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WO2011073593A1 - Integral metal lid having parallelogram-shaped predetermined break-off line - Google Patents

Integral metal lid having parallelogram-shaped predetermined break-off line Download PDF

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Publication number
WO2011073593A1
WO2011073593A1 PCT/FR2010/052793 FR2010052793W WO2011073593A1 WO 2011073593 A1 WO2011073593 A1 WO 2011073593A1 FR 2010052793 W FR2010052793 W FR 2010052793W WO 2011073593 A1 WO2011073593 A1 WO 2011073593A1
Authority
WO
WIPO (PCT)
Prior art keywords
line
transverse section
transverse
gripping member
breaking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/FR2010/052793
Other languages
French (fr)
Inventor
Jean-Marc Legresy
Patrick Oudart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trivium Packaging Group Netherlands BV
Original Assignee
Impress Group BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Impress Group BV filed Critical Impress Group BV
Priority to KR1020127014174A priority Critical patent/KR101835804B1/en
Priority to JP2012543885A priority patent/JP5695663B2/en
Priority to EP10807620.9A priority patent/EP2512940B1/en
Priority to BR112012014472A priority patent/BR112012014472A2/en
Priority to ES10807620.9T priority patent/ES2550763T3/en
Priority to PL10807620T priority patent/PL2512940T3/en
Publication of WO2011073593A1 publication Critical patent/WO2011073593A1/en
Priority to MA34868A priority patent/MA33750B1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/404—Details of the lines of weakness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/28—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness
    • B65D17/401—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall
    • B65D17/4011—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions at lines or points of weakness characterised by having the line of weakness provided in an end wall for opening completely by means of a tearing tab
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/001—Action for opening container
    • B65D2517/0016—Action for opening container pivot tab, push-down and pull-out tear panel

Definitions

  • the present invention relates to metal lids for containers, in particular metal containers of the type can. It relates more particularly to one-piece covers comprising (i) a peripheral portion for its assembly on the container body and (ii) a central shutter panel portion comprising a removable portion by tearing a breaking initiation line.
  • Some metal containers mainly cans for food packaging, are often equipped with a lid with an "easy" opening system, avoiding the use of a can opener.
  • a particularly interesting solution consists of a one-piece metal cover having a peripheral portion associated with a central panel provided with a portion or removable portion.
  • this removable portion is, on the one hand, delimited by a peripheral rupture initiation line, and on the other hand, equipped with a gripping and traction member, commonly called "opening ring”.
  • This gripping member conventionally comprises two parts or zones extending along its longitudinal axis: a peripheral part comprising a "nose” fixed to the removable portion of the central panel, close to the breaking initiation line, and an inner loop-shaped part which, before its traction operation for the opening, is pressed against the upper surface of this removable portion.
  • the user grasps the gripping member, generally by its free inner area, and then it away from the central panel.
  • the gripping member then forms a lever, the beak-shaped peripheral end of which causes a local break of the breaking initiation line over a small part of its length, called the "initial rupture zone".
  • the removable portion of the panel is then folded locally inward, along a fold line oriented perpendicularly, or approximately perpendicularly, with respect to the longitudinal axis of the gripping member.
  • the user exerts traction on the gripping member, so as to continue tearing the tear initiation line and dissociate the removable portion relative to the lid.
  • the gripping member therefore allows the transmission of the force applied by the user, and the energy generated, to the removable portion of the central panel, so as to ensure the tearing of the metal along the peripheral rupture initiation line.
  • the ease of opening is defined by the level of force and energy required to break this breakaway line.
  • This phenomenon can come from a poor efficiency in the transmission of the force and traction energy exerted by the user.
  • lids comprising a general parallelogram-shaped rupture initiation line (square or rectangular shape with rounded corners, viewed from above), consisting of rectilinear sections marrying the peripheral assembly part to ensure optimum and maximum opening of the lid.
  • US-A-2006/0042982 discloses a container equipped with a metal lid provided with a breaking initiation line consisting of four rectilinear sections arranged lozenge. One of the angles of this breaking initiation line is equipped with the opening ring.
  • Such a container has the advantage of offering some reduction in the effort to open, but no longer allows optimal access to the packaged product.
  • the first straight transverse section of the rupture initiation line makes it necessary to make a choice between (i) a reduction in the effort at opening but a reduced access to the packaged product. and (ii) optimal access to the packaged product but increased opening effort.
  • lids of this type to reduce the level of force and energy required for opening (good feeling of opening), while maintaining a maximum opening percentage to maintain easy access. to the packaged product.
  • the present invention therefore aims to meet this need.
  • the subject of the invention is a metal cover comprising (i) a central portion forming a central shutter panel, and (ii) a peripheral portion adapted to be secured to a container body; this central part comprises a removable part delimited by a break-off line in the general shape of a parallelogram, which breakaway line is composed of two longitudinal sections and two transverse sections; this removable portion is equipped, at one of its surfaces, with a gripping member composed of two parts or zones through which passes a longitudinal axis: a first portion secured to said removable portion and a second portion of grasping proper; the first part of the gripping member is secured at a junction angle corresponding to the junction between a first longitudinal section and a first transverse section of said breaking initiation line; which first longitudinal section and which first transverse section of said line of initiation of rupture, each comprise two portions (i) an upstream portion arranged at said junction angle, intended to be torn by an initial pivoting operation of said gripping member and (ii) a downstream portion remote from said junction angle,
  • this particular lid is characterized in that the downstream portion of the first transverse section of the rupture initiation line extends in such a way that, throughout its length, the lines which are tangents define an outside angle a greater than 45 °, and preferably between 46 ° and 49 ° at least at startup, with a straight line perpendicular to the longitudinal axis of the gripping member.
  • this external angle has increased, advantageously progressively, along the length of the downstream portion of the transverse section of the rupture initiation line, starting from its upstream portion.
  • the downstream portion of the first transverse section of the breaking initiation line comprises, on the side of the upstream portion, a portion of length, advantageously in the general shape of a circular arc, whose angle
  • the exterior has evolved, advantageously gradually or at least approximately progressively, from an initial value of between 46 ° and 49 °, to a final value of the order of 67 ° to 68 °.
  • the downstream portion of the first transverse section of the breaking initiation line is of generally curved shape; in this case, this downstream portion is advantageously constituted by a succession of radii and / or straight segments.
  • the peripheral portion of the lid is also in the general shape of a parallelogram, composed of two longitudinal edges and two transverse edges; and the rupture initiation line extends along said lid peripheral portion.
  • the first transverse section of the rupture initiation line is advantageously arranged close to a first transversal edge of the peripheral portion of the cover, such that the distance between said first transverse section of the rupture initiation line; and said first transverse edge of the peripheral portion is between 1 and 15 mm, and preferably between 1 and 10 mm;
  • the second transverse section of the breaking initiation line is advantageously of curved shape, adapted to also reduce the level of force and energy required for the final separation between the detachable portion and the remainder of the metal cover, so that particularly to reduce the phenomenon of spring effect;
  • this second transverse section of the breaking initiation line is advantageously constituted by a line in the form of an arc of a circle, a plurality of radii or a succession of line segments or a combination of such elements; again in this case, the second transverse section of the breaking initiation line is advantageously arranged near a second transversal edge of the peripheral part of the lid, so that the distance between said second transverse section of the line of the rupture primer and said second transverse edge facing the peripheral portion is between 1 and 15 mm, and preferably between 1 and 10 mm.
  • the present invention also relates to a container, in particular of the kind metal tin can, equipped with a metal lid as detailed above.
  • FIG. 1 is a general view from above of a one-piece cover according to the invention, with a gripping member;
  • FIG. 2 is an enlarged and partial view of the lid of Figure 1, the side of the gripping member (not shown for the sake of simplicity).
  • the lid 1, as shown in Figure 1, is intended to be assembled with the upper edge of a metal container body (not shown) of generally parallelepipedal shape with rounded corners.
  • This lid 1, and the associated metal container body are intended to form a tin generally in parallelepiped shape, often referred to as "club box".
  • the container body 1 usually consists of a side wall belt (generally square or rectangular section) whose bottom edge is extended by a bottom member.
  • connection between this lid 1 and the container body is performed by an assembly technique chosen by those skilled in the art, for example by a crimping technique.
  • the lid 1 according to the invention consists of a one-piece metal part, advantageously manufactured by a stamping technique from a sheet of metal material of the aluminum, steel, etc. type.
  • This lid 1 has, seen from above, a general shape of parallelogram, in this case a generally rectangular shape with rounded corners.
  • the peripheral ring 2 of generally rectangular shape, comprises two longitudinal edges 2a1 and 2a2 opposite, connected by two transverse edges 2b1 and 2b2 facing each other.
  • This ring 2 advantageously comprises a molding allowing its assembly by crimping on the container body.
  • the central shutter panel 3 is also of generally rectangular overall shape, with a longitudinal axis of symmetry 3 ', oriented parallel to the longitudinal edges 2a of the peripheral ring 2.
  • This shutter panel 3 is provided with a breaking initiation line 4, also called “incision line”, which delimits a central portion 5 equipped with a gripping member 7.
  • this central portion 5 then constitutes a removable portion or portion, by breaking the breaking initiation line 4.
  • the breaking initiation line 4 (hereinafter referred to as "incision line” for the sake of simplification) is also of generally rectangular overall shape, seen from above.
  • This incision line 4 is made by a thinning of the material, obtained by the implementation of a suitable tool during the manufacture of the lid.
  • the incision line 4 is here closed, or in other words complete, that is to say that it extends all around the removable part 5; alternatively, it could be only partial.
  • This line of incision 4 extends in this case along and near the peripheral ring 2; it comprises in this case two longitudinal sections 4a1 and 4a2 opposite (arranged along the longitudinal edges 2a1 and 2a2 of the ring 2), connected at their ends by two transverse sections 4b1 and 4b2 (on the side of the two transverse edges 2b1 and 2b2 of the ring 2).
  • the two longitudinal sections 4a1 and 4a2 opposite here are rectilinear.
  • the two opposite transverse sections 4b1 and 4b2 each have a generally curved shape in order to improve the level of force and energy required to open the lid, as developed below.
  • the removable portion 5 is equipped, at its upper surface, the gripping member 7 whose manipulation by the user will allow easy opening of the lid 1 (that is to say, a separation, total or partial of the removable portion 5 relative to the remainder of the cover 1 by tearing the incision line 4).
  • this manipulation of the gripping member 7 conventionally comprises two steps: a first step of initiating tearing of the incision line 4, by manual pivoting / tilting of the gripping member 7, and a step of continuing the tearing of the rupture line 4, by manual pulling on this member 7.
  • the gripping member 7 is known to those skilled in the art under the name of "opening ring”.
  • the opening ring 7 is shown schematically here. It is fixed here at a junction angle 4c_ of the incision line 4, formed by the junction between a first transverse section 4b1 and a first longitudinal section 4a2 of the said break line 4.
  • This joining angle 4c_ will form an initial breaking or tearing zone of the incision line 4, appearing during the initial pivoting of the opening ring 7.
  • This opening ring 7 comprises two parts or zones, arranged along a longitudinal axis 7 'oriented coaxially with the bisector of the initial tear zone 4c_, namely:
  • the first transverse section 4b1 and the first longitudinal section 4a2 of the incision line 4 then each comprise two portions: (i) an upstream portion 4b1 1 and 4a21, intended to be torn by the initial pivoting operation of the gripping member 7 (these two portions 4b1 1 and 4a21 then together define the initial break zone 4c_ of the line d incision 4), and
  • upstream portions 4b1 1 and 4a21, on the one hand, and downstream 4b12 and 4a22, on the other hand, are here separated by a line designated by the reference 8 in FIG.
  • this separation line 8 extends perpendicular to the longitudinal axis 7 'of the gripping member 7, and corresponds at least approximately to the fold line of the removable portion 5 following the initial pivoting of this gripping member 7.
  • the downstream portion 4b12 of the first transverse section 4b1 of the incision line 4 is shaped so that along its length, its tangents 9 (only one of these tangents is drawn in FIG. 1 by way of illustration) define an outside angle a greater than 45 °, with the line 8 perpendicular to the axis longitudinal 7 'of the gripping member 7.
  • exital angle a is more precisely meant the time angle defined in FIG. 1 between, on the one hand, the tangents 9 to the downstream portion 4b12 of the first transverse section 4b1 of the incision line 4 and, d on the other hand, the segment 8a of the perpendicular line 8, situated outside the removable portion 5.
  • this downstream portion 4b12 of the first transverse section 4b1 is further arranged so that the outside angle has increased starting from the upstream portion 4b1 1 of said first transverse section 4b1 and that towards said second longitudinal section 4a1 associated.
  • the outside angle a is advantageously between 46 ° and 90 °.
  • the downstream portion 4b12 of the first transverse section 4b1 is advantageously curved.
  • this downstream portion 4b12 of the first transverse section 4b1 can be divided into two parts:
  • the radius of the first part is significantly greater than the radius of the second part.
  • This downstream portion 4b12 of the first transverse section 4b1 thus advantageously has a convex internal curvature (curvature continuously oriented inwards).
  • the first part in an elliptical arc, corresponds to approximately between 2/3 and 3/4 of the length of the first transverse section 4b1.
  • the second part in an arc, constitutes the remaining length of said first transverse section 4b1, ie between 1/3 and 1/4 of the length of said first transverse section 4b1.
  • downstream portion 4b12 of the first transverse section 4b1 is composed of several radii.
  • this downstream portion 4b12 here comprises rays between 15 and 100 mm.
  • the upstream portion 4b1 1 of said first transverse section 4b1 already forms an angle a at its end located on the side of the following downstream portion 4b12.
  • the angle defined by the tangents 9 to the downstream portion 4b12 of the first transverse section 4b1 and the longitudinal axis 7 'of the gripping member 7 has a value which remains less than 45 ° (this angle is counterclockwise in Figures 1 and 2).
  • the angle ⁇ defined by the tangents 9 to the downstream portion 4b12 of the first transverse section 4b1 and a line 10 extending at 45 ° with respect to the longitudinal axis 7 'of the gripping member (extending here again along the transverse border facing 2b1 of the ring 2) has a value greater than 0 ° (this angle ⁇ is clockwise in FIG. 2).
  • this angle ⁇ is illustrated by the successive angles ⁇ 1 to ⁇ 10 in FIG. 2, spaced apart in pairs of 3 mm, and respectively have the following values of the order of 1, 5 °, 3 °, 6 °, 9 °, 1 °, 14 °, 16 °, 22 °, 31 ° and 42 °.
  • This angle ⁇ thus progresses to a value of the order of 90 ° at the second longitudinal section 4a1.
  • this downstream portion 4b12 could consist of a succession of line segments or a combination of curve segments and line segments.
  • these segments each have a length of the order of 5 mm.
  • this distance increases progressively along the downstream portion 4b12 of the first transverse section 4b1, from a distance of the order of 0.6 to 2 mm, up to a maximum distance of about 15 mm. preferably between 5 and 10 mm.
  • downstream portion 4a22 of the first longitudinal section 4a2 here defines an external angle ⁇ of the order of 45 ° with the aforementioned line 8 perpendicular to the longitudinal axis 7 'of the gripping member 7 .
  • the upstream portions 4b1 1 and 4a21, constituting the initial break zone 4c_, extend for their part at an angle of the order of 90 ° relative to each other; and they are connected by a curved junction portion in an arc.
  • the second transverse section 4b2 is also generally curved, here in the general shape of a circular arc.
  • this second transverse section 4b2 is formed near the second transverse edge 2b2 facing the ring 2, so that the distance e between these two sections 4b2 and 2b2 is advantageously between 1 and 15 mm, and preferably between 1 and 10 mm.
  • the user grasps the free portion 7b of the gripping member 7, so as to move it away from the detachable portion 5.
  • the separation of the detachable portion 5 continues with a second step in which the user exerts a pull on the gripping member 7, so as to continue the tearing of the incision line 4.
  • the opening ring 7 progresses at least approximately along the length and facing a general traction line.
  • this traction line January 1 comprises two portions along its length, namely:
  • a proximal portion 11a located on the side of the initial rupture zone 4c of the incision initiation line 4, and oriented coaxially or at least substantially coaxially with respect to the longitudinal axis 7 'of the gripping 7, and
  • a distal portion 11b located on the side of the distal zone 4b2 of the incision initiation line 4, and oriented coaxially or at least substantially coaxially with respect to the central axis 3 'of the central panel 3.
  • the efficiency of the force and traction energy applied by the user, to initiate the tearing of the incision line 4 during this traction step, is significantly improved compared to the usual covers, thanks to the particular conformation of the downstream portion 4b12 of the first transverse section 4b1.
  • the traction on the gripping member 7 is continued in a conventional manner along a distal portion 1 1b of the pulling line 1 1, so as to tear the incision line 4 in the direction of the second transverse section 4b2.
  • the final tear of the second transverse section 4b2 of the incision line 4 will be facilitated by its particular curved shape, which also aims to optimize the efficiency of the force and the traction energy.
  • This particular structure makes it possible to limit the spring effect phenomenon often observed on the detached portion 5.
  • the assembly ring 2 of the lid 1 could have any other shape, seen from above, adapted to the section of the receiving body (for example oval, circular or polygonal).
  • the lid according to the invention has the advantage of having a good opening feeling and an improved recovery value, while maintaining a maximum opening area.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Containers Opened By Tearing Frangible Portions (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Abstract

The invention relates to a metal lid for a container body, in particular for a container such as a metal can, said lid (1) including: (i) a central portion (3) forming a central sealing panel, including a removable portion (5) defined by an predetermined break-off line (4) in the general shape of a parallelogram and provided with a gripping member (7) having a longitudinal axis (7'); and (ii) a peripheral portion (2) in the general shape of a parallelogram, suitable for being secured to said container body. According to the invention, the predetermined break-off line (4) comprises a first transverse section (4b11) in which a downstream portion (4b12), at a distance from the joining angle (4c) on which the gripping member (7) is mounted, extends such that, along the entire length thereof, the lines (9) that are tangential thereto (9) define an outer angle (α) of more than 45° with a straight line (8) perpendicular to the longitudinal axis (7') of the gripping member (7), said angle increasing over the length of said downstream portion (4b12), so as to improve the efficiency of the force and energy exerted by the user in order to tear the predetermined break-off line (4).

Description

COUVERCLE METALLIQUE MONOBLOC AVEC LIGNE D'AMORCE DE RUPTURE EN FORME DE PARALLELOGRAMME  MONOBLOC METAL COVER WITH PARALLELOGRAM FORMED RUPTURE PRIMER LINE

La présente invention concerne les couvercles métalliques pour contenants, en particulier les contenants métalliques du genre boîte de conserve. Elle concerne plus particulièrement les couvercles monoblocs comportant (i) une partie périphérique pour son assemblage sur le corps de contenant et (ii) une partie formant panneau central d'obturation comprenant une partie amovible par déchirage d'une ligne d'amorce de rupture.  The present invention relates to metal lids for containers, in particular metal containers of the type can. It relates more particularly to one-piece covers comprising (i) a peripheral portion for its assembly on the container body and (ii) a central shutter panel portion comprising a removable portion by tearing a breaking initiation line.

Certains contenants métalliques, principalement les boîtes de conserve pour le conditionnement de denrées alimentaires, sont souvent équipés d'un couvercle muni d'un système d'ouverture « facile », évitant l'utilisation d'un outil du type ouvre-boîtes.  Some metal containers, mainly cans for food packaging, are often equipped with a lid with an "easy" opening system, avoiding the use of a can opener.

Une solution particulièrement intéressante consiste en un couvercle métallique monobloc comportant une partie périphérique associée à un panneau central muni d'une portion ou partie amovible. Pour cela, cette portion amovible est, d'une part, délimitée par une ligne d'amorce de rupture périphérique, et d'autre part, équipée d'un organe de préhension et de traction, couramment dénommé « anneau d'ouverture ».  A particularly interesting solution consists of a one-piece metal cover having a peripheral portion associated with a central panel provided with a portion or removable portion. For this, this removable portion is, on the one hand, delimited by a peripheral rupture initiation line, and on the other hand, equipped with a gripping and traction member, commonly called "opening ring".

Cet organe de préhension comprend classiquement deux parties ou zones s'étendant le long de son axe longitudinal : - une partie périphérique comportant un « bec », fixée à la portion amovible du panneau central, à proximité de la ligne d'amorce de rupture, et - une partie intérieure en forme de boucle qui, avant sa manœuvre par traction pour l'ouverture, est plaquée contre la surface supérieure de cette portion amovible.  This gripping member conventionally comprises two parts or zones extending along its longitudinal axis: a peripheral part comprising a "nose" fixed to the removable portion of the central panel, close to the breaking initiation line, and an inner loop-shaped part which, before its traction operation for the opening, is pressed against the upper surface of this removable portion.

En général, pour ouvrir un tel couvercle, l'utilisateur est amené à manœuvrer l'organe de préhension selon deux opérations successives et distinctes.  In general, to open such a lid, the user is made to maneuver the gripping member in two successive and distinct operations.

Tout d'abord, dans une première étape d'amorce de l'ouverture, l'utilisateur saisit l'organe de préhension, en général par sa zone intérieure libre, puis il l'écarté du panneau central.  First, in a first step of initiating the opening, the user grasps the gripping member, generally by its free inner area, and then it away from the central panel.

L'organe de préhension forme alors un levier, dont l'extrémité périphérique en forme de bec provoque une cassure locale de la ligne d'amorce de rupture sur une petite partie de sa longueur, dite « zone de rupture initiale ». La portion amovible du panneau est alors pliée localement vers l'intérieur, selon une ligne de pliage orientée perpendiculairement, ou approximativement perpendiculairement, par rapport à l'axe longitudinal de l'organe de préhension.  The gripping member then forms a lever, the beak-shaped peripheral end of which causes a local break of the breaking initiation line over a small part of its length, called the "initial rupture zone". The removable portion of the panel is then folded locally inward, along a fold line oriented perpendicularly, or approximately perpendicularly, with respect to the longitudinal axis of the gripping member.

Dans une seconde étape de l'ouverture, l'utilisateur exerce une traction sur l'organe de préhension, de sorte à poursuivre la déchirure de la ligne d'amorce de rupture et dissocier la portion amovible par rapport au couvercle.  In a second step of the opening, the user exerts traction on the gripping member, so as to continue tearing the tear initiation line and dissociate the removable portion relative to the lid.

L'organe de préhension permet donc la transmission de la force appliquée par l'utilisateur, et de l'énergie générée, vers la portion amovible du panneau central, de sorte à assurer la déchirure du métal le long de la ligne d'amorce de rupture périphérique. The gripping member therefore allows the transmission of the force applied by the user, and the energy generated, to the removable portion of the central panel, so as to ensure the tearing of the metal along the peripheral rupture initiation line.

La facilité de l'ouverture est définie par le niveau de force et d'énergie requis pour rompre cette ligne d'amorce de rupture.  The ease of opening is defined by the level of force and energy required to break this breakaway line.

Et il est bien connu qu'un niveau de force et d'énergie réduit à l'ouverture constitue un élément important pour les utilisateurs manipulant une telle boîte de conserve. And it is well known that a reduced level of force and energy at the opening is an important element for users handling such a can.

Or, encore à ce jour, certains couvercles, équipés d'un organe de préhension et de traction nécessitent un niveau de force et d'énergie relativement élevé pour assurer leur ouverture.  However, still to date, some lids, equipped with a gripping member and traction require a relatively high level of force and energy to ensure their opening.

Ce phénomène peut provenir d'un mauvais rendement dans la transmission de la force et de l'énergie de traction exercées par l'utilisateur. This phenomenon can come from a poor efficiency in the transmission of the force and traction energy exerted by the user.

C'est en particulier le cas des couvercles comportant une ligne d'amorce de rupture en forme générale de parallélogramme (forme carrée ou rectangulaire avec coins arrondis, vue par dessus), constituée de tronçons rectilignes épousant la partie périphérique d'assemblage pour assurer une ouverture optimale et maximale du couvercle.  This is particularly the case of the lids comprising a general parallelogram-shaped rupture initiation line (square or rectangular shape with rounded corners, viewed from above), consisting of rectilinear sections marrying the peripheral assembly part to ensure optimum and maximum opening of the lid.

Il s'avère qu'une telle ligne de rupture nécessite normalement un niveau de force et d'énergie relativement important, notamment à l'amorçage de l'étape de déchirure par traction.  It turns out that such a breaking line normally requires a relatively high level of force and energy, especially at the initiation of the tensile tearing step.

Le document US-A-2006/0042982 décrit un contenant équipé d'un couvercle métallique muni d'une ligne d'amorce de rupture constituée de quatre tronçons rectilignes agencés en losange. L'un des angles de cette ligne d'amorce de rupture est équipé de l'anneau d'ouverture.  The document US-A-2006/0042982 discloses a container equipped with a metal lid provided with a breaking initiation line consisting of four rectilinear sections arranged lozenge. One of the angles of this breaking initiation line is equipped with the opening ring.

Un tel contenant a l'intérêt d'offrir une certaine réduction de l'effort à l'ouverture, mais ne permet plus un accès optimal au produit conditionné.  Such a container has the advantage of offering some reduction in the effort to open, but no longer allows optimal access to the packaged product.

Ainsi, dans les contenants de l'art antérieur, le premier tronçon transversal rectiligne de la ligne d'amorce de rupture oblige à faire un choix entre (i) une réduction de l'effort à l'ouverture mais un accès réduit au produit conditionné et (ii) l'accès optimal au produit conditionné mais un effort à l'ouverture accru.  Thus, in the containers of the prior art, the first straight transverse section of the rupture initiation line makes it necessary to make a choice between (i) a reduction in the effort at opening but a reduced access to the packaged product. and (ii) optimal access to the packaged product but increased opening effort.

II existe ainsi un besoin, pour des couvercles de ce type, de réduire le niveau de force et d'énergie nécessaire à l'ouverture (bonne sensation d'ouverture), tout en conservant un pourcentage d'ouverture maximal pour maintenir un accès aisé au produit conditionné.  There is thus a need, for lids of this type, to reduce the level of force and energy required for opening (good feeling of opening), while maintaining a maximum opening percentage to maintain easy access. to the packaged product.

La présente invention a donc pour objectif de répondre à ce besoin.  The present invention therefore aims to meet this need.

Ainsi, l'objet concerné par l'invention est un couvercle métallique comprenant (i) une partie centrale formant panneau central d'obturation, et (ii) une partie périphérique adaptée pour être solidarisée sur un corps de contenant ; cette partie centrale comprend une partie amovible délimitée par une ligne d'amorce de rupture en forme générale de parallélogramme, laquelle ligne d'amorce de rupture est composée de deux tronçons longitudinaux et de deux tronçons transversaux ; cette portion amovible est équipée, au niveau de l'une de ses surfaces, d'un organe de préhension composé de deux parties ou zones au travers desquelles passe un axe longitudinal : - une première partie solidarisée avec ladite portion amovible et une seconde partie de préhension proprement dite ; la première partie de l'organe de préhension est solidarisée au niveau d'un angle de jonction correspondant à la jonction entre un premier tronçon longitudinal et un premier tronçon transversal de ladite ligne d'amorce de rupture ; lequel premier tronçon longitudinal et lequel premier tronçon transversal de ladite ligne d'amorce de rupture, comprennent chacun deux portions (i) une portion amont agencée au niveau dudit angle de jonction, destinée à être déchirée par une opération de pivotement initial dudit organe de préhension et (ii) une portion aval à distance dudit angle de jonction, constituée par la longueur restante dudit tronçon et destinée à être déchirée par une opération suivante de traction sur l'organe de préhension. Thus, the subject of the invention is a metal cover comprising (i) a central portion forming a central shutter panel, and (ii) a peripheral portion adapted to be secured to a container body; this central part comprises a removable part delimited by a break-off line in the general shape of a parallelogram, which breakaway line is composed of two longitudinal sections and two transverse sections; this removable portion is equipped, at one of its surfaces, with a gripping member composed of two parts or zones through which passes a longitudinal axis: a first portion secured to said removable portion and a second portion of grasping proper; the first part of the gripping member is secured at a junction angle corresponding to the junction between a first longitudinal section and a first transverse section of said breaking initiation line; which first longitudinal section and which first transverse section of said line of initiation of rupture, each comprise two portions (i) an upstream portion arranged at said junction angle, intended to be torn by an initial pivoting operation of said gripping member and (ii) a downstream portion remote from said junction angle, constituted by the remaining length of said section and intended to be torn by a subsequent traction operation on the gripping member.

Conformément à l'invention, ce couvercle particulier est caractérisé par le fait que la portion aval du premier tronçon transversal de la ligne d'amorce de rupture s'étend de telle sorte que, tout au long de sa longueur, les lignes qui lui sont tangentes définissent un angle extérieur a supérieur à 45°, et de préférence compris entre 46° et 49° au moins au démarrage, avec une droite perpendiculaire à l'axe longitudinal de l'organe de préhension. De plus, cet angle extérieur a augmente, avantageusement progressivement, sur la longueur de la portion aval du tronçon transversal de la ligne d'amorce de rupture, partant de sa portion amont.  According to the invention, this particular lid is characterized in that the downstream portion of the first transverse section of the rupture initiation line extends in such a way that, throughout its length, the lines which are tangents define an outside angle a greater than 45 °, and preferably between 46 ° and 49 ° at least at startup, with a straight line perpendicular to the longitudinal axis of the gripping member. In addition, this external angle has increased, advantageously progressively, along the length of the downstream portion of the transverse section of the rupture initiation line, starting from its upstream portion.

Le demandeur démontre que cette conformation de la ligne d'amorce de rupture apporte une réduction significative du niveau de force et d'énergie nécessaire à l'ouverture, par un meilleur rendement de transmission d'effort et d'énergie sur la ligne d'amorce de rupture (en particulier au début de la seconde étape d'ouverture par traction sur l'anneau), tout en permettant de préserver un large accès au produit conditionné (sans zones difficiles d'accès et/ou cachées sous la matière restant du couvercle après ouverture).  The applicant demonstrates that this conformation of the line of initiation of rupture brings a significant reduction of the level of force and energy necessary for the opening, by a better efficiency of transmission of effort and energy on the line of fracture initiation (especially at the beginning of the second step of opening by traction on the ring), while allowing to preserve a wide access to the packaged product (without areas difficult to access and / or hidden under the remaining material of the lid after opening).

Selon un mode de réalisation particulier, la portion aval du premier tronçon transversal de la ligne d'amorce de rupture comporte, du côté de la portion amont, une partie de longueur, avantageusement en forme générale d'arc de cercle, dont l'angle extérieur a évolue, avantageusement progressivement ou au moins approximativement progressivement, depuis une valeur initiale comprise entre 46° et 49°, jusqu'à une valeur finale de l'ordre de 67° à 68°.  According to a particular embodiment, the downstream portion of the first transverse section of the breaking initiation line comprises, on the side of the upstream portion, a portion of length, advantageously in the general shape of a circular arc, whose angle The exterior has evolved, advantageously gradually or at least approximately progressively, from an initial value of between 46 ° and 49 °, to a final value of the order of 67 ° to 68 °.

Selon une autre caractéristique de l'invention, la portion aval du premier tronçon transversal de la ligne d'amorce de rupture est de forme générale courbe ; dans ce cas, cette portion aval est avantageusement constituée d'une succession de rayons et/ou de segments de droite. Selon un mode particulier de réalisation, la partie périphérique du couvercle est également en forme générale de parallélogramme, composé de deux bordures longitudinales et de deux bordures transversales ; et la ligne d'amorce de rupture s'étend le long de ladite partie périphérique de couvercle. According to another characteristic of the invention, the downstream portion of the first transverse section of the breaking initiation line is of generally curved shape; in this case, this downstream portion is advantageously constituted by a succession of radii and / or straight segments. According to a particular embodiment, the peripheral portion of the lid is also in the general shape of a parallelogram, composed of two longitudinal edges and two transverse edges; and the rupture initiation line extends along said lid peripheral portion.

Dans ce cadre :  In this context:

- le premier tronçon transversal de la ligne d'amorce de rupture est avantageusement agencé à proximité d'une première bordure transversale de la partie périphérique de couvercle, de telle sorte que la distance entre ledit premier tronçon transversal de la ligne d'amorce de rupture et ladite première bordure transversale de la partie périphérique est comprise entre 1 et 15 mm, et de préférence entre 1 et 10 mm ;  the first transverse section of the rupture initiation line is advantageously arranged close to a first transversal edge of the peripheral portion of the cover, such that the distance between said first transverse section of the rupture initiation line; and said first transverse edge of the peripheral portion is between 1 and 15 mm, and preferably between 1 and 10 mm;

- le second tronçon transversal de la ligne d'amorce de rupture est avantageusement de forme courbe, adaptée pour réduire également le niveau de force et d'énergie nécessaire à la séparation finale entre la portion détachable et le reste du couvercle métallique, de sorte en particulier à réduire le phénomène d'effet ressort ; dans ce cas, ce second tronçon transversal de la ligne d'amorce de rupture est avantageusement constitué d'une ligne en arc de cercle, de plusieurs rayons ou d'une succession de segments de droite ou d'une combinaison de tels éléments ; encore dans ce cas, le second tronçon transversal de la ligne d'amorce de rupture est agencé avantageusement à proximité d'une seconde bordure transversale de la partie périphérique du couvercle, de telle sorte que la distance entre ledit second tronçon transversal de la ligne d'amorce de rupture et ladite seconde bordure transversale en regard de la partie périphérique est comprise entre 1 et 15 mm, et de préférence entre 1 et 10 mm.  the second transverse section of the breaking initiation line is advantageously of curved shape, adapted to also reduce the level of force and energy required for the final separation between the detachable portion and the remainder of the metal cover, so that particularly to reduce the phenomenon of spring effect; in this case, this second transverse section of the breaking initiation line is advantageously constituted by a line in the form of an arc of a circle, a plurality of radii or a succession of line segments or a combination of such elements; again in this case, the second transverse section of the breaking initiation line is advantageously arranged near a second transversal edge of the peripheral part of the lid, so that the distance between said second transverse section of the line of the rupture primer and said second transverse edge facing the peripheral portion is between 1 and 15 mm, and preferably between 1 and 10 mm.

La présente invention concerne encore un contenant, en particulier du genre boîte de conserve métallique, équipé d'un couvercle métallique tel que détaillé ci- dessus.  The present invention also relates to a container, in particular of the kind metal tin can, equipped with a metal lid as detailed above.

L'invention va maintenant être illustrée, sans être aucunement limitée, par la description suivante d'un mode de réalisation particulier, en relation avec les dessins annexés dans lesquels :  The invention will now be illustrated, without being limited in any way, by the following description of a particular embodiment, with reference to the accompanying drawings in which:

- la figure 1 est une vue générale de dessus d'un couvercle monobloc selon l'invention, avec organe de préhension ; - Figure 1 is a general view from above of a one-piece cover according to the invention, with a gripping member;

- la figure 2 est une vue agrandie et partielle du couvercle de la figure 1 , du côté de l'organe de préhension (non représenté par souci de simplification).  - Figure 2 is an enlarged and partial view of the lid of Figure 1, the side of the gripping member (not shown for the sake of simplicity).

Le couvercle 1 , tel que représenté sur la figure 1 , est destiné à être assemblé avec la bordure supérieure d'un corps de contenant métallique (non représenté) de forme générale parallélépipédique avec coins arrondis.  The lid 1, as shown in Figure 1, is intended to be assembled with the upper edge of a metal container body (not shown) of generally parallelepipedal shape with rounded corners.

Ce couvercle 1 , et le corps de contenant métallique associé, sont destinés à former une boîte de conserve en général de forme parallélépipédique, souvent dénommée « boîte club ». Le corps de contenant 1 se compose habituellement d'une ceinture de parois latérales (à section globalement carrée ou rectangulaire) dont la bordure inférieure est prolongée par un élément de fond. This lid 1, and the associated metal container body, are intended to form a tin generally in parallelepiped shape, often referred to as "club box". The container body 1 usually consists of a side wall belt (generally square or rectangular section) whose bottom edge is extended by a bottom member.

La liaison entre ce couvercle 1 et le corps de contenant s'effectue par une technique d'assemblage choisie par l'homme du métier, par exemple par une technique de sertissage.  The connection between this lid 1 and the container body is performed by an assembly technique chosen by those skilled in the art, for example by a crimping technique.

Le couvercle 1 selon l'invention consiste en une pièce métallique monobloc, avantageusement fabriquée par une technique d'emboutissage à partir d'une tôle en matériau métallique du type aluminium, acier, etc.  The lid 1 according to the invention consists of a one-piece metal part, advantageously manufactured by a stamping technique from a sheet of metal material of the aluminum, steel, etc. type.

Ce couvercle 1 présente, vu de dessus, une forme générale de parallélogramme, en l'occurrence une forme générale rectangulaire avec coins arrondis.  This lid 1 has, seen from above, a general shape of parallelogram, in this case a generally rectangular shape with rounded corners.

Il se compose, de manière bien connue de l'homme du métier, de deux parties qui ont globalement chacune une forme générale de parallélogramme :  It is composed, in a manner well known to those skilled in the art, of two parts which generally have each a general shape of parallelogram:

(i) une partie périphérique 2, formant une bague d'assemblage pour la fixation sur le corps d'un contenant, et  (i) a peripheral portion 2, forming an assembly ring for attachment to the body of a container, and

(ii) une partie centrale 3, entourée par la partie périphérique 2 et formant un panneau central d'obturation.  (ii) a central portion 3, surrounded by the peripheral portion 2 and forming a central shutter panel.

La bague périphérique 2, de forme globalement rectangulaire, comprend deux bordures longitudinales 2a1 et 2a2 en regard, reliées par deux bordures transversales 2b1 et 2b2 en regard.  The peripheral ring 2, of generally rectangular shape, comprises two longitudinal edges 2a1 and 2a2 opposite, connected by two transverse edges 2b1 and 2b2 facing each other.

Cette bague 2 comporte avantageusement une moulure permettant son assemblage par sertissage sur le corps de contenant.  This ring 2 advantageously comprises a molding allowing its assembly by crimping on the container body.

Le panneau central d'obturation 3 est lui aussi de forme générale globalement rectangulaire, avec un axe longitudinal de symétrie 3', orienté parallèlement aux bordures longitudinales 2a de la bague périphérique 2.  The central shutter panel 3 is also of generally rectangular overall shape, with a longitudinal axis of symmetry 3 ', oriented parallel to the longitudinal edges 2a of the peripheral ring 2.

Ce panneau d'obturation 3 est muni d'une ligne d'amorce de rupture 4, dénommée encore « ligne d'incision », qui délimite une partie centrale 5 équipée d'un organe de préhension 7.  This shutter panel 3 is provided with a breaking initiation line 4, also called "incision line", which delimits a central portion 5 equipped with a gripping member 7.

Comme développé ci-après, cette partie centrale 5 constitue alors une partie ou portion amovible, par cassure de la ligne d'amorce de rupture 4.  As developed hereinafter, this central portion 5 then constitutes a removable portion or portion, by breaking the breaking initiation line 4.

La ligne d'amorce de rupture 4 (dénommée par la suite « ligne d'incision » par souci de simplification) est également de forme générale globalement rectangulaire, vue de dessus.  The breaking initiation line 4 (hereinafter referred to as "incision line" for the sake of simplification) is also of generally rectangular overall shape, seen from above.

Cette ligne d'incision 4 est réalisée par un amincissement de la matière, obtenu par la mise en œuvre d'un outil adapté lors de la fabrication du couvercle.  This incision line 4 is made by a thinning of the material, obtained by the implementation of a suitable tool during the manufacture of the lid.

La ligne d'incision 4 est ici fermée, ou autrement dit complète, c'est-à-dire qu'elle s'étend sur tout le pourtour de la partie amovible 5 ; de manière alternative, elle pourrait être uniquement partielle. Cette ligne d'incision 4 s'étend en l'occurrence le long et à proximité de la bague périphérique 2 ; elle comprend en l'occurrence deux tronçons longitudinaux 4a1 et 4a2 en regard (agencés le long des bordures longitudinales 2a1 et 2a2 de la bague 2), reliés à leurs extrémités par deux tronçons transversaux 4b1 et 4b2 (du côté des deux bordures transversales 2b1 et 2b2 de la bague 2). The incision line 4 is here closed, or in other words complete, that is to say that it extends all around the removable part 5; alternatively, it could be only partial. This line of incision 4 extends in this case along and near the peripheral ring 2; it comprises in this case two longitudinal sections 4a1 and 4a2 opposite (arranged along the longitudinal edges 2a1 and 2a2 of the ring 2), connected at their ends by two transverse sections 4b1 and 4b2 (on the side of the two transverse edges 2b1 and 2b2 of the ring 2).

Les deux tronçons longitudinaux 4a1 et 4a2 en regard sont ici rectilignes. Les deux tronçons transversaux 4b1 et 4b2 en regard ont quant à eux chacun une forme générale courbe afin d'améliorer le niveau de force et d'énergie nécessaire à l'ouverture du couvercle, tel que développé ci-après.  The two longitudinal sections 4a1 and 4a2 opposite here are rectilinear. The two opposite transverse sections 4b1 and 4b2 each have a generally curved shape in order to improve the level of force and energy required to open the lid, as developed below.

La portion amovible 5 est équipée, au niveau de sa surface supérieure, de l'organe de préhension 7 dont la manipulation par l'utilisateur va permettre une ouverture facile du couvercle 1 (c'est-à-dire une désolidarisation, totale ou partielle de la portion amovible 5 par rapport au reste du couvercle 1 par déchirure de la ligne d'incision 4).  The removable portion 5 is equipped, at its upper surface, the gripping member 7 whose manipulation by the user will allow easy opening of the lid 1 (that is to say, a separation, total or partial of the removable portion 5 relative to the remainder of the cover 1 by tearing the incision line 4).

Comme détaillé ci-après, cette manipulation de l'organe de préhension 7 comprend classiquement deux étapes : - une première étape d'amorce de déchirure de la ligne d'incision 4, par pivotement/basculement manuel de l'organe de préhension 7, et - une étape de poursuite de la déchirure de la ligne de rupture 4, par traction manuelle sur cet organe 7.  As detailed below, this manipulation of the gripping member 7 conventionally comprises two steps: a first step of initiating tearing of the incision line 4, by manual pivoting / tilting of the gripping member 7, and a step of continuing the tearing of the rupture line 4, by manual pulling on this member 7.

L'organe de préhension 7 est connu de l'homme du métier sous l'appellation d'« anneau d'ouverture ».  The gripping member 7 is known to those skilled in the art under the name of "opening ring".

L'anneau d'ouverture 7 est ici représenté de manière schématique. Il est fixé ici au niveau d'un angle de jonction 4ç_ de la ligne d'incision 4, formé par la jonction entre un premier tronçon transversal 4b1 et un premier tronçon longitudinal 4a2 de ladite ligne de rupture 4.  The opening ring 7 is shown schematically here. It is fixed here at a junction angle 4c_ of the incision line 4, formed by the junction between a first transverse section 4b1 and a first longitudinal section 4a2 of the said break line 4.

Cet angle de jonction 4ç_ va former une zone de cassure ou de déchirure initiale de la ligne d'incision 4, apparaissant lors du pivotement initial de l'anneau d'ouverture 7.  This joining angle 4c_ will form an initial breaking or tearing zone of the incision line 4, appearing during the initial pivoting of the opening ring 7.

Cet anneau d'ouverture 7 comporte deux parties ou zones, agencées selon un axe longitudinal 7' orienté coaxialement à la bissectrice de la zone de déchirure initiale 4ç_, à savoir :  This opening ring 7 comprises two parts or zones, arranged along a longitudinal axis 7 'oriented coaxially with the bisector of the initial tear zone 4c_, namely:

(i) une partie périphérique 7a comportant un bec (non visible), fixée à la portion amovible 5, à proximité de la ligne d'incision 4, et  (i) a peripheral portion 7a having a spout (not visible), attached to the removable portion 5, near the incision line 4, and

(ii) une partie intérieure 7b en forme de boucle de préhension, qui est à l'origine plaquée contre la surface supérieure de la portion amovible 5.  (ii) a gripping loop-shaped inner portion 7b, which is originally pressed against the upper surface of the removable portion 5.

Tenant compte de l'agencement de cet anneau d'ouverture 7 et de son pivotement initial lors de l'ouverture du couvercle, le premier tronçon transversal 4b1 et le premier tronçon longitudinal 4a2 de la ligne d'incision 4 comportent alors chacune deux portions : (i) une portion amont 4b1 1 et 4a21 , destinée à être déchirée par l'opération initiale de pivotement de l'organe de préhension 7 (ces deux portions 4b1 1 et 4a21 définissent alors ensemble la zone de cassure initiale 4ç_ de la ligne d'incision 4), et Taking into account the arrangement of this opening ring 7 and its initial pivoting when opening the lid, the first transverse section 4b1 and the first longitudinal section 4a2 of the incision line 4 then each comprise two portions: (i) an upstream portion 4b1 1 and 4a21, intended to be torn by the initial pivoting operation of the gripping member 7 (these two portions 4b1 1 and 4a21 then together define the initial break zone 4c_ of the line d incision 4), and

(ii) une portion aval 4b12 et 4a22, dans le prolongement de la zone de cassure initiale 4ç_, constituant la longueur restante des deux tronçons 4b1 et 4a2 correspondants, destinée à être déchirée par l'étape de traction sur l'organe de préhension 7.  (ii) a downstream portion 4b12 and 4a22, in the extension of the initial break zone 4c_, constituting the remaining length of the two corresponding sections 4b1 and 4a2, intended to be torn by the traction step on the gripping member 7 .

Ces portions amont 4b1 1 et 4a21 , d'une part, et aval 4b12 et 4a22, d'autre part, sont ici séparées par une ligne désignée par le repère 8 sur la figure 1 .  These upstream portions 4b1 1 and 4a21, on the one hand, and downstream 4b12 and 4a22, on the other hand, are here separated by a line designated by the reference 8 in FIG.

Comme développé par la suite, cette ligne de séparation 8 s'étend perpendiculairement à l'axe longitudinal 7' de l'organe de préhension 7, et correspond au moins approximativement à la ligne de pliage de la partie amovible 5 suite au pivotement initial de cet organe de préhension 7. As developed subsequently, this separation line 8 extends perpendicular to the longitudinal axis 7 'of the gripping member 7, and corresponds at least approximately to the fold line of the removable portion 5 following the initial pivoting of this gripping member 7.

Conformément à l'invention, pour améliorer le niveau de force et d'énergie nécessaires à l'initiation de l'étape de traction, la portion aval 4b12 du premier tronçon transversal 4b1 de la ligne d'incision 4 est conformée de telle sorte que, tout au long de sa longueur, ses tangentes 9 (seule l'une de ces tangentes est dessinée sur la figure 1 à titre d'illustration) définissent un angle extérieur a supérieur à 45°, avec la ligne 8 perpendiculaire à l'axe longitudinal 7' de l'organe de préhension 7.  According to the invention, to improve the level of force and energy required for the initiation of the traction step, the downstream portion 4b12 of the first transverse section 4b1 of the incision line 4 is shaped so that along its length, its tangents 9 (only one of these tangents is drawn in FIG. 1 by way of illustration) define an outside angle a greater than 45 °, with the line 8 perpendicular to the axis longitudinal 7 'of the gripping member 7.

Par « angle extérieur a », on entend plus précisément l'angle horaire défini sur la figure 1 entre, d'une part, les tangentes 9 à la portion aval 4b12 du premier tronçon transversal 4b1 de la ligne d'incision 4 et, d'autre part, le segment 8a de la ligne perpendiculaire 8, situé à l'extérieur de la portion amovible 5.  By "external angle a" is more precisely meant the time angle defined in FIG. 1 between, on the one hand, the tangents 9 to the downstream portion 4b12 of the first transverse section 4b1 of the incision line 4 and, d on the other hand, the segment 8a of the perpendicular line 8, situated outside the removable portion 5.

En l'occurrence, cette portion aval 4b12 du premier tronçon transversal 4b1 est agencée encore de sorte que l'angle extérieur a augmente partant de la portion amont 4b1 1 dudit premier tronçon transversal 4b1 et cela en direction dudit second tronçon longitudinal 4a1 associé.  In this case, this downstream portion 4b12 of the first transverse section 4b1 is further arranged so that the outside angle has increased starting from the upstream portion 4b1 1 of said first transverse section 4b1 and that towards said second longitudinal section 4a1 associated.

De préférence encore, l'angle extérieur a est avantageusement compris entre 46° et 90°.  More preferably, the outside angle a is advantageously between 46 ° and 90 °.

La portion aval 4b12 du premier tronçon transversal 4b1 est avantageusement courbe.  The downstream portion 4b12 of the first transverse section 4b1 is advantageously curved.

Selon la forme de réalisation illustrée, cette portion aval 4b12 du premier tronçon transversal 4b1 peut être divisée en deux parties :  According to the illustrated embodiment, this downstream portion 4b12 of the first transverse section 4b1 can be divided into two parts:

- une première partie en forme générale d'arc d'ellipse ou d'arc de cercle, du côté de la portion amont 4b1 1 , dont l'angle extérieur a évolue progressivement, ou au moins quasi-progressivement, depuis une valeur initiale comprise entre 46° et 49°, jusqu'à une valeur finale de l'ordre de 67° à 68°, et  a first portion in the general shape of an arc of an ellipse or an arc of a circle, on the side of the upstream portion 4b1 1, the external angle of which has progressively changed, or at least almost progressively, since an initial value included between 46 ° and 49 °, to a final value of the order of 67 ° to 68 °, and

- une seconde partie en forme générale d'arc de cercle, pour le raccordement avec le second tronçon longitudinal 4a1 . Le rayon de la première partie est significativement supérieur au rayon de la seconde partie. - A second portion in the general shape of a circular arc, for connection with the second longitudinal section 4a1. The radius of the first part is significantly greater than the radius of the second part.

Cette portion aval 4b12 du premier tronçon transversal 4b1 présente ainsi avantageusement une courbure interne convexe (courbure continûment orientée vers l'intérieur).  This downstream portion 4b12 of the first transverse section 4b1 thus advantageously has a convex internal curvature (curvature continuously oriented inwards).

En l'espèce, la première partie, en arc d'ellipse, correspond à environ entre 2/3 et 3/4 de la longueur du premier tronçon transversal 4b1 .  In this case, the first part, in an elliptical arc, corresponds to approximately between 2/3 and 3/4 of the length of the first transverse section 4b1.

La seconde partie, en arc de cercle, constitue la longueur restante dudit premier tronçon transversal 4b1 , soit environ entre 1/3 et 1/4 de la longueur dudit premier tronçon transversal 4b1 .  The second part, in an arc, constitutes the remaining length of said first transverse section 4b1, ie between 1/3 and 1/4 of the length of said first transverse section 4b1.

De préférence encore, la portion aval 4b12 du premier tronçon transversal 4b1 est composée de plusieurs rayons.  More preferably, the downstream portion 4b12 of the first transverse section 4b1 is composed of several radii.

Par exemple, cette portion aval 4b12 comporte ici des rayons compris entre 15 et 100 mm.  For example, this downstream portion 4b12 here comprises rays between 15 and 100 mm.

La portion amont 4b1 1 dudit premier tronçon transversal 4b1 forme déjà un angle a au niveau de son extrémité située du côté de la portion aval 4b12 suivante.  The upstream portion 4b1 1 of said first transverse section 4b1 already forms an angle a at its end located on the side of the following downstream portion 4b12.

Encore autrement dit, l'angle défini par les tangentes 9 à la portion aval 4b12 du premier tronçon transversal 4b1 et l'axe longitudinal 7' de l'organe de préhension 7, présente une valeur qui reste inférieure à 45° (cet angle est anti-horaire sur les figures 1 et 2).  In other words, the angle defined by the tangents 9 to the downstream portion 4b12 of the first transverse section 4b1 and the longitudinal axis 7 'of the gripping member 7 has a value which remains less than 45 ° (this angle is counterclockwise in Figures 1 and 2).

Selon encore un autre référentiel illustré sur la figure 2, l'angle γ défini par les tangentes 9 à la portion aval 4b12 du premier tronçon transversal 4b1 et une droite 10 s'étendant à 45° par rapport à l'axe longitudinal 7' de l'organe de préhension (s'étendant ici encore le long de la bordure transversale en regard 2b1 de la bague 2), présente une valeur supérieure à 0° (cet angle γ est horaire sur la figure 2).  According to yet another reference illustrated in FIG. 2, the angle γ defined by the tangents 9 to the downstream portion 4b12 of the first transverse section 4b1 and a line 10 extending at 45 ° with respect to the longitudinal axis 7 'of the gripping member (extending here again along the transverse border facing 2b1 of the ring 2) has a value greater than 0 ° (this angle γ is clockwise in FIG. 2).

En l'occurrence et uniquement à titre d'exemple, cet angle γ est illustré par les angles successifs γ1 à γ10 sur la figure 2, espacés deux à deux de 3 mm, et présentent respectivement les valeurs suivantes de l'ordre de 1 ,5°, 3°, 6°, 9°, 1 1 °, 14°, 16°, 22°, 31 ° et 42°. Cet angle γ progresse ainsi jusqu'à une valeur de l'ordre de 90° au niveau du second tronçon longitudinal 4a1 .  In this case and only by way of example, this angle γ is illustrated by the successive angles γ1 to γ10 in FIG. 2, spaced apart in pairs of 3 mm, and respectively have the following values of the order of 1, 5 °, 3 °, 6 °, 9 °, 1 °, 14 °, 16 °, 22 °, 31 ° and 42 °. This angle γ thus progresses to a value of the order of 90 ° at the second longitudinal section 4a1.

De manière alternative, cette portion aval 4b12 pourrait être constituée d'une succession de segments de droites ou d'une combinaison de segments de courbe et de segments de droite.  Alternatively, this downstream portion 4b12 could consist of a succession of line segments or a combination of curve segments and line segments.

Par exemple, ces segments ont chacun une longueur de l'ordre de 5 mm.  For example, these segments each have a length of the order of 5 mm.

De plus, ce premier tronçon transversal 4b1 de la ligne d'incision 4 est ménagé à proximité de la bague d'assemblage 2 de telle sorte que la distance d entre ledit premier tronçon transversal 4b1 et la bordure transversale en regard 2b1 de cette bague 2 soit comprise entre 1 et 15 mm, et de préférence encore comprise entre 1 et Plus précisément, cette « distance d » correspond à la longueur du segment de droite, d'une part, s'étendant perpendiculairement à la tangente 9 de la portion aval 4b12 du premier tronçon transversal 4b1 et, d'autre part, délimité par ladite portion aval 4b12 et par la bordure transversale en regard 2b1 de la bague 2. In addition, this first transverse section 4b1 of the incision line 4 is formed close to the assembly ring 2 so that the distance d between said first transverse section 4b1 and the transverse border opposite 2b1 of this ring 2 between 1 and 15 mm, and more preferably between 1 and More precisely, this "distance d" corresponds to the length of the line segment, on the one hand, extending perpendicularly to the tangent 9 of the downstream portion 4b12 of the first transverse section 4b1 and, on the other hand, delimited by said downstream portion 4b12 and the transverse border facing 2b1 of the ring 2.

En l'occurrence, cette distance augmente progressivement le long de la portion aval 4b12 du premier tronçon transversal 4b1 , depuis une distance de l'ordre de 0,6 à 2 mm, jusqu'à une distance maximale de l'ordre de 15 mm, de préférence entre 5 et 10 mm.  In this case, this distance increases progressively along the downstream portion 4b12 of the first transverse section 4b1, from a distance of the order of 0.6 to 2 mm, up to a maximum distance of about 15 mm. preferably between 5 and 10 mm.

Cette distance d permet de conserver une ouverture maximale du couvercle 1 , et de limiter la distance de la bande de matière résiduelle après détachement de la partie amovible 5.  This distance d makes it possible to maintain a maximum opening of the lid 1, and to limit the distance of the strip of residual material after detachment of the removable part 5.

On obtient ainsi un compromis optimal entre la restitution du produit et la facilité d'ouverture.  This gives an optimal compromise between the return of the product and the ease of opening.

D'autre part, la portion aval 4a22 du premier tronçon longitudinal 4a2 définit ici quant à elle un angle extérieur β de l'ordre de 45° avec la ligne 8 précitée perpendiculaire à l'axe longitudinal 7' de l'organe de préhension 7.  On the other hand, the downstream portion 4a22 of the first longitudinal section 4a2 here defines an external angle β of the order of 45 ° with the aforementioned line 8 perpendicular to the longitudinal axis 7 'of the gripping member 7 .

Par « angle extérieur β », on entend plus précisément l'angle anti-horaire défini sur la figure 1 entre, d'une part, la portion aval 4a22 du premier tronçon longitudinal 4a2 de la ligne d'incision 4 et, d'autre part, le segment 8b de la ligne de séparation 8, situé à l'extérieur de la ligne d'incision 4.  By "external angle β" is meant more precisely the anti-clockwise angle defined in FIG. 1 between, on the one hand, the downstream portion 4a22 of the first longitudinal section 4a2 of the incision line 4 and, on the other hand, 8b of the separation line 8, located outside the incision line 4.

Les portions amont 4b1 1 et 4a21 , constitutives de la zone de cassure initiale 4ç_, s'étendent quant à elles selon un angle de l'ordre de 90° l'une par rapport à l'autre ; et elles sont reliées par une portion de jonction courbe en arc de cercle.  The upstream portions 4b1 1 and 4a21, constituting the initial break zone 4c_, extend for their part at an angle of the order of 90 ° relative to each other; and they are connected by a curved junction portion in an arc.

Par ailleurs, le second tronçon transversal 4b2 est également de forme générale courbe, ici en forme générale d'arc de cercle.  Moreover, the second transverse section 4b2 is also generally curved, here in the general shape of a circular arc.

De manière alternative, ce second tronçon transversal 4b2 pourrait être constitué d'une succession de rayons ou d'une pluralité de segments de droites.  Alternatively, this second transverse section 4b2 could consist of a succession of rays or a plurality of straight segments.

Là encore, ce second tronçon transversal 4b2 est ménagé à proximité de la seconde bordure transversale 2b2 en regard de la bague 2, de telle sorte que la distance e entre ces deux tronçons 4b2 et 2b2 soit avantageusement comprise entre 1 et 15 mm, et de préférence entre 1 et 10 mm.  Again, this second transverse section 4b2 is formed near the second transverse edge 2b2 facing the ring 2, so that the distance e between these two sections 4b2 and 2b2 is advantageously between 1 and 15 mm, and preferably between 1 and 10 mm.

Là encore, cette distance particulière permet de limiter l'encombrement de la bande de matière du panneau central 3 restante après le retrait de la portion amovible 5 du couvercle 1 .  Here again, this particular distance makes it possible to limit the bulk of the material strip of the remaining central panel 3 after the removal of the removable portion 5 of the cover 1.

En pratique, l'anneau d'ouverture 7 permet à l'utilisateur d'exercer une traction sur la portion détachable 5, de manière à rompre la ligne d'incision 4 depuis la zone de cassure initiale 4ç_ (attenante à l'organe de préhension 7), jusqu'à une zone distale ou aval située à l'opposée dudit anneau d'ouverture 7. Cette zone distale correspond ici au second tronçon transversal 4b2 de la ligne d'incision 4. De manière classique, la manœuvre de l'anneau 7 est mise en œuvre en deux temps distincts, pour assurer l'ouverture du couvercle 1 . In practice, the opening ring 7 allows the user to exert traction on the detachable portion 5, so as to break the incision line 4 from the initial break zone 4c_ (adjacent to the 7), to a zone distal or downstream located opposite the opening ring 7. This distal zone here corresponds to the second transverse section 4b2 of the incision line 4. Conventionally, the operation of the ring 7 is implemented in two distinct times, to ensure the opening of the lid 1.

Dans la première étape d'amorce de rupture, l'utilisateur saisit la partie libre 7b de l'organe de préhension 7, de sorte à l'écarter de la portion détachable 5.  In the first step of initiation of rupture, the user grasps the free portion 7b of the gripping member 7, so as to move it away from the detachable portion 5.

L'organe de préhension forme alors un levier, mis en rotation par l'utilisateur ; cela provoque, d'une part, une cassure locale de la ligne d'incision 4 au niveau de sa zone de cassure initiale 4ç_ et, d'autre part, le pliage local vers l'intérieur d'une partie du panneau détachable 5 selon la ligne de séparation 8 (qui s'étend perpendiculairement à l'axe longitudinal 7' de l'organe de préhension 7). The gripping member then forms a lever, rotated by the user; this causes, on the one hand, a local break of the incision line 4 at its initial breaking zone 4c_ and, on the other hand, the local folding inward of a part of the detachable panel 5 according to the separation line 8 (which extends perpendicularly to the longitudinal axis 7 'of the gripping member 7).

Lors de cette première étape, la portion amont 4b1 1 du premier tronçon transversal 4b1 et la portion amont 4a21 du premier tronçon longitudinal 4a2 de la ligne d'incision 4, sont déchirées.  During this first step, the upstream portion 4b1 1 of the first transverse section 4b1 and the upstream portion 4a21 of the first longitudinal section 4a2 of the incision line 4 are torn.

La séparation de la portion détachable 5 se poursuit par une seconde étape dans laquelle l'utilisateur exerce une traction sur l'organe de préhension 7, de sorte à continuer la déchirure de la ligne d'incision 4.  The separation of the detachable portion 5 continues with a second step in which the user exerts a pull on the gripping member 7, so as to continue the tearing of the incision line 4.

Lors de cette traction, l'anneau d'ouverture 7 progresse au moins approximativement sur la longueur et en regard d'une ligne générale de traction.  During this traction, the opening ring 7 progresses at least approximately along the length and facing a general traction line.

Cette ligne de traction est illustrée sur la figure 1 par une ligne discontinue 1 1 correspondant à sa projection sur le panneau central 3 ; cette ligne de traction 1 1 s'étend entre la zone de rupture initiale 4ç_ et le second tronçon transversal 4b2 de la ligne d'incision 4. This pulling line is illustrated in FIG. 1 by a discontinuous line 1 1 corresponding to its projection on the central panel 3; this pulling line 1 1 extends between the initial fracture zone 4c and the second transverse section 4b2 of the incision line 4.

En l'occurrence, cette ligne de traction 1 1 comprend deux portions sur sa longueur, à savoir :  In this case, this traction line January 1 comprises two portions along its length, namely:

- une portion proximale 1 1 a située du côté de la zone de rupture initiale 4ç de la ligne d'amorce d'incision 4, et orientée coaxialement ou au moins sensiblement coaxialement par rapport à l'axe longitudinal 7' de l'organe de préhension 7, et  a proximal portion 11a located on the side of the initial rupture zone 4c of the incision initiation line 4, and oriented coaxially or at least substantially coaxially with respect to the longitudinal axis 7 'of the gripping 7, and

- une portion distale 1 1 b située du côté de la zone distale 4b2 de la ligne d'amorce d'incision 4, et orientée coaxialement ou au moins sensiblement coaxialement par rapport à l'axe médian 3' du panneau central 3.  a distal portion 11b located on the side of the distal zone 4b2 of the incision initiation line 4, and oriented coaxially or at least substantially coaxially with respect to the central axis 3 'of the central panel 3.

Ces deux portions 1 1 a et 1 1 b de la ligne de traction 1 1 forment ici un angle, l'une par rapport à l'autre, en raison de la position de l'anneau 7 dans un angle de la ligne d'amorce d'incision 4. Elles sont reliées par une portion de jonction 1 1ç_, en forme générale d'arc de cercle : l'anneau d'ouverture 7 passe progressivement de la portion proximale 1 1 a à la portion distale 1 1 b. These two portions 1 1 a and 1 1 b of the traction line 1 1 form here an angle, relative to each other, because of the position of the ring 7 in an angle of the line of incision primer 4. They are connected by a junction portion 1 1c_, generally circular arc shape: the opening ring 7 passes gradually from the proximal portion 1 1a to the distal portion 1 1b.

Au cours de cette seconde étape de déchirure, la traction est donc initiée par l'opérateur dans une direction orientée selon l'axe longitudinal 7' de l'organe de préhension 7, correspondant à la portion proximale 1 1 a de la ligne de traction 1 1 .  During this second tearing step, the traction is initiated by the operator in a direction oriented along the longitudinal axis 7 'of the gripping member 7, corresponding to the proximal portion 11a of the traction line. 1 1.

Le rendement de la force et de l'énergie de traction appliquées par l'utilisateur, pour initier la déchirure de la ligne d'incision 4 lors de cette étape de traction, est significativement amélioré par rapport aux couvercles habituels, cela grâce à la conformation particulière de la portion aval 4b12 du premier tronçon transversal 4b1 . The efficiency of the force and traction energy applied by the user, to initiate the tearing of the incision line 4 during this traction step, is significantly improved compared to the usual covers, thanks to the particular conformation of the downstream portion 4b12 of the first transverse section 4b1.

Toujours au cours de cette seconde étape, la traction sur l'organe de préhension 7 se poursuit de manière classique selon une portion distale 1 1 b de la ligne de traction 1 1 , cela de sorte à déchirer la ligne d'incision 4 en direction du second tronçon transversal 4b2.  Still during this second step, the traction on the gripping member 7 is continued in a conventional manner along a distal portion 1 1b of the pulling line 1 1, so as to tear the incision line 4 in the direction of the second transverse section 4b2.

La déchirure finale du second tronçon transversal 4b2 de la ligne d'incision 4 va être facilitée par sa forme courbe particulière, qui vise aussi à optimiser le rendement de la force et de l'énergie de traction.  The final tear of the second transverse section 4b2 of the incision line 4 will be facilitated by its particular curved shape, which also aims to optimize the efficiency of the force and the traction energy.

Cette structure particulière permet de limiter le phénomène d'effet ressort souvent observé sur la portion détachée 5.  This particular structure makes it possible to limit the spring effect phenomenon often observed on the detached portion 5.

A titre indicatif, des essais avec le couvercle tel que représenté sur la figure 1 montrent que, pour son ouverture complète, il est nécessaire d'appliquer une force totale de 21 ,8 N et une énergie de 1 ,12 J, alors qu'un couvercle muni d'une ligne d'amorce de rupture classique, nécessite pour son ouverture complète une force de 32,4 N et une énergie de 1 ,41 J.  As an indication, tests with the cover as shown in Figure 1 show that for its full opening, it is necessary to apply a total force of 21.8 N and an energy of 1.12 J, while a lid provided with a conventional breaking initiation line, requires for its full opening a force of 32.4 N and an energy of 1.41 J.

De manière générale, la bague d'assemblage 2 du couvercle 1 pourrait présenter toute autre forme, vue de dessus, adaptée à la section du corps de réception (par exemple ovale, circulaire ou polygonale).  In general, the assembly ring 2 of the lid 1 could have any other shape, seen from above, adapted to the section of the receiving body (for example oval, circular or polygonal).

Le couvercle selon l'invention a l'intérêt de présenter une bonne sensation d'ouverture et une valeur de reprise améliorée, tout en maintenant une surface d'ouverture maximale.  The lid according to the invention has the advantage of having a good opening feeling and an improved recovery value, while maintaining a maximum opening area.

Claims

- REVENDICATIONS - 1 .- Couvercle métallique pour un corps de contenant, en particulier pour un contenant du genre boîte de conserve métallique, lequel couvercle (1 ) comprend (i) une partie centrale (3) formant un panneau central d'obturation, et (ii) une partie périphérique (2) adaptée pour être solidarisée sur ledit corps de contenant, laquelle partie centrale (3) comprend une partie amovible (5) délimitée par une ligne d'amorce de rupture (4) en forme générale de parallélogramme, et laquelle ligne d'amorce de rupture (4) est composée de deux tronçons longitudinaux (4a) et de deux tronçons transversaux (4b), laquelle partie amovible (5) du couvercle (1 ) est équipée, au niveau de l'une de ses surfaces, d'un organe de préhension (7) composé de deux parties (7a, 7b) par lesquelles passe un axe longitudinal (7') : - une première partie (7a) solidarisée avec ladite partie amovible (5) et une seconde partie (7b) de préhension proprement dite, laquelle première partie (7a) de l'organe de préhension (7) est solidarisée au niveau d'un angle de jonction (4ç) correspondant à jonction entre un premier tronçon longitudinal (4a2) et un premier tronçon transversal (4b1 ) de ladite ligne d'amorce de rupture (4), lequel premier tronçon longitudinal (4a2) et lequel premier tronçon transversal (4b1 ) de ladite ligne d'amorce de rupture (4), comprenant chacun deux parties : (i) une portion amont (4a21 , 4b1 1 ) agencée au niveau dudit angle de jonction (4ç_), destinée à être déchirée par une opération de pivotement initial dudit organe de préhension (7) et (ii) une portion aval (4a22, 4b12), à distance dudit angle de jonction (4ç_), constituée par la longueur restante dudit tronçon (4a2, 4b1 ) et destinée à être déchirée par une opération suivante de traction sur l'organe de préhension (7), caractérisé en ce que ladite portion aval (4b12) du premier tronçon transversal (4b1 ) de la ligne d'amorce de rupture (4) s'étend de telle sorte que, tout au long de sa longueur, les tangentes (9) à celle-ci définissent un angle extérieur (a) qui est supérieur à 45°, avec une droite (8) perpendiculaire audit axe longitudinal (7') de l'organe de préhension (7), lequel angle extérieur (a) augmente sur la longueur de la portion aval (4b12) du tronçon transversal (4b1 ) de la ligne d'amorce de rupture (4), partant de sa portion amont (4b1 1 ). - 1 .- Metal lid for a container body, in particular for a container of the metal cans type, which cover (1) comprises (i) a central portion (3) forming a central obturation panel, and (ii) a peripheral portion (2) adapted to be secured to said container body, which central portion (3) comprises a removable portion (5) delimited by a generally parallelogram-shaped breaking line (4), and which breaking initiation line (4) is composed of two longitudinal sections (4a) and two transverse sections (4b), which removable part (5) of the cover (1) is equipped, at one of its surfaces, a gripping member (7) consisting of two parts (7a, 7b) through which passes a longitudinal axis (7 '): - a first portion (7a) secured to said removable portion (5) and a second gripping portion (7b) itself, which first by tie (7a) of the gripping member (7) is secured at a junction angle (4c) corresponding to a junction between a first longitudinal section (4a2) and a first transverse section (4b1) of said line of rupture primer (4), which first longitudinal section (4a2) and which first transverse section (4b1) of said failure initiation line (4), each comprising two parts: (i) an upstream portion (4a21, 4b1 1 ) arranged at said junction angle (4c_), intended to be torn by an initial pivoting operation of said gripping member (7) and (ii) a downstream portion (4a22, 4b12), away from said junction angle (4c_). ), constituted by the remaining length of said section (4a2, 4b1) and intended to be torn by a subsequent traction operation on the gripping member (7), characterized in that said downstream portion (4b12) of the first transverse section ( 4b1) of the breaking initiation line (4) extends from tell so that, along its length, the tangents (9) thereon define an outside angle (a) which is greater than 45 °, with a line (8) perpendicular to said longitudinal axis (7 ') of the gripping member (7), which external angle (a) increases along the length of the downstream portion (4b12) of the transverse section (4b1) of the breaking initiation line (4), starting from its upstream portion (4b1) 1). 2.- Couvercle métallique selon la revendication 1 , caractérisé en ce que la portion aval (4b12) du premier tronçon transversal (4b1 ) de la ligne d'amorce de rupture (4) comporte, du côté de la portion amont (4b1 1 ), une partie de longueur dont l'angle extérieur (a) évolue depuis une valeur initiale comprise entre 46° et 49°, jusqu'à une valeur finale de l'ordre de 67° à 68°.  2. Metal cover according to claim 1, characterized in that the downstream portion (4b12) of the first transverse section (4b1) of the breaking initiation line (4) comprises, on the side of the upstream portion (4b1 1). , a portion of length whose outer angle (a) changes from an initial value between 46 ° and 49 °, to a final value of the order of 67 ° to 68 °. 3.- Couvercle métallique selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que la portion aval (4b12) du premier tronçon transversal (4b1 ) de la ligne d'amorce de rupture (4) est de forme générale courbe. 3. Metal cover according to any one of claims 1 or 2, characterized in that the downstream portion (4b12) of the first transverse section (4b1) of the breaking line (4) is generally curved. 4. - Couvercle métallique selon la revendication 3, caractérisé en ce que la portion aval (4b12) du premier tronçon transversal (4b1 ) de la ligne d'amorce de rupture (4) est constituée d'une succession de rayons. 4. - Metal lid according to claim 3, characterized in that the downstream portion (4b12) of the first transverse section (4b1) of the breaking initiation line (4) consists of a succession of spokes. 5. - Couvercle métallique selon la revendication 3, caractérisé en ce que la portion aval (4b12) du premier tronçon transversal (4b1 ) de la ligne d'amorce de rupture (4) est constituée d'une succession de segments de droite.  5. - metal cover according to claim 3, characterized in that the downstream portion (4b12) of the first transverse section (4b1) of the breaking initiation line (4) consists of a succession of straight segments. 6. - Couvercle métallique selon l'une quelconque des revendications 1 à 5, caractérisé en ce que la partie périphérique (2) du couvercle (1 ) est en forme générale de parallélogramme, composé de deux bordures longitudinales (2a) et de deux bordures transversales (2b), et en ce que la ligne d'amorce de rupture (4) s'étend le long de ladite partie périphérique du couvercle (2).  6. - metal lid according to any one of claims 1 to 5, characterized in that the peripheral portion (2) of the lid (1) is in the general shape of a parallelogram, consisting of two longitudinal edges (2a) and two borders transverse (2b), and in that the breaking initiation line (4) extends along said peripheral portion of the cover (2). 7. - Couvercle métallique selon la revendication 6, caractérisé en ce que le premier tronçon transversal (4b1 ) de la ligne d'amorce de rupture (4) est agencé à proximité d'une première bordure transversale (2b1 ) de la partie périphérique (2) de couvercle (1 ), de telle sorte que la distance (d) entre ledit premier tronçon transversal (4b1 ) de la ligne d'amorce de rupture (4) et ladite première bordure transversale (2b1 ) de la partie périphérique (2) est comprise entre 1 et 15 mm.  7. - metal cover according to claim 6, characterized in that the first transverse section (4b1) of the breaking initiation line (4) is arranged near a first transverse edge (2b1) of the peripheral part ( 2), so that the distance (d) between said first transverse section (4b1) of the breaking initiation line (4) and said first transversal edge (2b1) of the peripheral portion (2) ) is between 1 and 15 mm. 8 - Couvercle métallique selon l'une quelconque des revendications 6 ou 7, caractérisé en ce que le second tronçon transversal (4b2) de la ligne d'amorce de rupture (4) est de forme courbe.  8 - Metal cover according to any one of claims 6 or 7, characterized in that the second transverse section (4b2) of the breaking initiation line (4) is curved. 9. - Couvercle métallique selon la revendication 8, caractérisé en ce que le second tronçon transversal (4b2) de la ligne d'amorce de rupture (4) est agencé à proximité de la seconde bordure transversale (2b2) de la partie périphérique (2) du couvercle (1 ), de telle sorte que la distance (e) entre ledit second tronçon transversal (4b2) de la ligne d'amorce de rupture (4) et ladite bordure transversale (2b2) en regard de la partie périphérique (2) est comprise entre 1 et 15 mm.  9. - Metal lid according to claim 8, characterized in that the second transverse section (4b2) of the breaking initiation line (4) is arranged near the second transverse edge (2b2) of the peripheral portion (2). ) of the cover (1), so that the distance (e) between said second transverse section (4b2) of the breaking initiation line (4) and said transverse border (2b2) facing the peripheral part (2 ) is between 1 and 15 mm. 10. - Contenant, en particulier du genre boîte de conserve métallique, équipé d'un couvercle métallique (1 ) selon l'une quelconque des revendications 1 à 9.  10. - Container, in particular of the kind metal tin, equipped with a metal lid (1) according to any one of claims 1 to 9.
PCT/FR2010/052793 2009-12-17 2010-12-17 Integral metal lid having parallelogram-shaped predetermined break-off line Ceased WO2011073593A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
KR1020127014174A KR101835804B1 (en) 2009-12-17 2010-12-17 Integral metal lid having parallelogram-shaped predetermined break-off line
JP2012543885A JP5695663B2 (en) 2009-12-17 2010-12-17 Integrated metal lid with a parallelogram-shaped predetermined break line
EP10807620.9A EP2512940B1 (en) 2009-12-17 2010-12-17 Integral metal lid having parallelogram-shaped predetermined break-off line
BR112012014472A BR112012014472A2 (en) 2009-12-17 2010-12-17 integral metal cap having predetermined breaking line in parallelogram form
ES10807620.9T ES2550763T3 (en) 2009-12-17 2010-12-17 Monobloc metal lid with parallelogram shaped break start line
PL10807620T PL2512940T3 (en) 2009-12-17 2010-12-17 Integral metal lid having parallelogram-shaped predetermined break-off line
MA34868A MA33750B1 (en) 2009-12-17 2012-05-14 Monolithic metallic lid with parallel-shaped starting line

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0906115A FR2954290B1 (en) 2009-12-17 2009-12-17 MONOBLOC METAL COVER WITH PARALLELOGRAM FORMED RUPTURE PRIMER LINE
FR0906115 2009-12-17

Publications (1)

Publication Number Publication Date
WO2011073593A1 true WO2011073593A1 (en) 2011-06-23

Family

ID=42027717

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FR2010/052793 Ceased WO2011073593A1 (en) 2009-12-17 2010-12-17 Integral metal lid having parallelogram-shaped predetermined break-off line

Country Status (10)

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EP (1) EP2512940B1 (en)
JP (1) JP5695663B2 (en)
KR (1) KR101835804B1 (en)
BR (1) BR112012014472A2 (en)
CL (1) CL2012001388A1 (en)
ES (1) ES2550763T3 (en)
FR (1) FR2954290B1 (en)
MA (1) MA33750B1 (en)
PL (1) PL2512940T3 (en)
WO (1) WO2011073593A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR450848A (en) * 1912-10-25 1913-04-04 Biscuits Olibet Soc D Device for closing and opening a metal box with a welded cover
FR1241919A (en) * 1959-10-22 1960-09-23 Kelsey Hayes Compnay Opening device for sealed containers
USRE27017E (en) * 1969-09-25 1970-12-29 Fraze can end with folded full tab
FR2103632A1 (en) * 1970-08-31 1972-04-14 Aluminum Co Of America
EP0061980A1 (en) * 1981-03-20 1982-10-06 Cebal Easily openable can with pull tab and score line
US20060042982A1 (en) 2004-09-01 2006-03-02 Goodwin G W Jr Welding rod container

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR450848A (en) * 1912-10-25 1913-04-04 Biscuits Olibet Soc D Device for closing and opening a metal box with a welded cover
FR1241919A (en) * 1959-10-22 1960-09-23 Kelsey Hayes Compnay Opening device for sealed containers
USRE27017E (en) * 1969-09-25 1970-12-29 Fraze can end with folded full tab
FR2103632A1 (en) * 1970-08-31 1972-04-14 Aluminum Co Of America
EP0061980A1 (en) * 1981-03-20 1982-10-06 Cebal Easily openable can with pull tab and score line
US20060042982A1 (en) 2004-09-01 2006-03-02 Goodwin G W Jr Welding rod container

Also Published As

Publication number Publication date
JP2013514241A (en) 2013-04-25
JP5695663B2 (en) 2015-04-08
MA33750B1 (en) 2012-11-01
BR112012014472A2 (en) 2017-03-14
FR2954290A1 (en) 2011-06-24
EP2512940B1 (en) 2015-07-29
KR20120115968A (en) 2012-10-19
EP2512940A1 (en) 2012-10-24
PL2512940T3 (en) 2015-12-31
KR101835804B1 (en) 2018-03-08
CL2012001388A1 (en) 2012-10-12
FR2954290B1 (en) 2012-03-23
ES2550763T3 (en) 2015-11-12

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