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EP0686568A2 - Récipient pourvu d'un élément de fermeture insérable - Google Patents

Récipient pourvu d'un élément de fermeture insérable Download PDF

Info

Publication number
EP0686568A2
EP0686568A2 EP95810281A EP95810281A EP0686568A2 EP 0686568 A2 EP0686568 A2 EP 0686568A2 EP 95810281 A EP95810281 A EP 95810281A EP 95810281 A EP95810281 A EP 95810281A EP 0686568 A2 EP0686568 A2 EP 0686568A2
Authority
EP
European Patent Office
Prior art keywords
opening
container
closure unit
lip
potential
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.)
Granted
Application number
EP95810281A
Other languages
German (de)
English (en)
Other versions
EP0686568B1 (fr
EP0686568A3 (fr
Inventor
Paul Tragardh
Elmar Mock
Matthias Hell
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance SA
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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Publication of EP0686568A2 publication Critical patent/EP0686568A2/fr
Publication of EP0686568A3 publication Critical patent/EP0686568A3/xx
Application granted granted Critical
Publication of EP0686568B1 publication Critical patent/EP0686568B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/70—Break-in flaps, or members adapted to be torn-off, to provide pouring openings
    • B65D5/708—Separate tearable flexible elements covering a discharge opening of a container, e.g. adhesive tape
    • 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
    • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
    • B65D5/42—Details of containers or of foldable or erectable container blanks
    • B65D5/72—Contents-dispensing means
    • B65D5/74—Spouts
    • B65D5/746—Spouts formed separately from the container
    • 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
    • B65D2231/00—Means for facilitating the complete expelling of the contents
    • B65D2231/02—Precut holes or weakened zones

Definitions

  • the invention is in the field of the packaging industry and relates to a combination according to the preamble of the first independent claim, consisting of a container and a closure unit which can be inserted into the container wall.
  • Containers made of plastic-coated cardboard are usually opened to pour out the contents by either opening a seam of the container or tearing off a corner. In both cases, the container cannot be closed again, which means that once opened, the container can no longer be easily transported and that the contents must be used up quickly if it spoils in contact with the outside air.
  • Containers which do not have the disadvantages described above are equipped, for example, with closure units which are attached via an opening in the container wall and which consist of a pouring part and a closing part, the closing part closing the pouring opening of the pouring part and being removable therefrom.
  • Containers equipped in this way are relatively expensive to manufacture.
  • the closure unit is usually in the material for the container wall before it is folded into the container and welded or at least before the container is filled, and it must therefore meet the same hygienic and antiseptic conditions as the inside of the container wall.
  • the combination usually comes onto the market with the closure unit adhering to the side of the container, in the same way that containers with drinking straws come onto the market.
  • the potential opening in the container is a predetermined point, which is designed such that it can be opened by the consumer simply by removing a pull-off strip and / or by breaking a predetermined breaking point in the container wall or in at least one layer of the container wall when the closure unit is inserted , creating an opening with a given shape.
  • Such a plug-in closure unit has inner and outer holding means and, if it is positioned in the container opening, the edge of the container wall is held between these holding means.
  • the publication EP-A2-291112 describes a combination of container and plug-in closure unit which more or less fulfills the above-mentioned conditions.
  • the closure unit of the combination described consists of a pouring part and a closure part are connected to one another by a hinge, the closure part having an opening lip which is arranged opposite the hinge and is used to open the closure unit.
  • the above conditions for the opening in the container wall and for the flatness of the closure unit are well met, but in favor of the flatness the pouring properties of the closure unit are poor, such that they have to be supported by a protruding edge on the container.
  • the closure unit of the combination described is mounted on the container by positioning it on the opening and then pressing it into the opening with a force which acts essentially perpendicular to the container wall.
  • a catch runs around the entire circumference of the pouring part, which serves as an internal holding means.
  • the outermost edge of the catch (catch edge) delimits an area which has essentially the same shape as the opening in the container wall, but is larger than this.
  • the catch is pressed through the container wall opening and then holds the closure unit firmly in the opening.
  • the container wall is stretched around the opening and at least temporarily deformed.
  • the force required to insert the locking unit is rather large.
  • the entire container wall is pressed against the inside of the container, which can result in the contents overflowing.
  • the opening properties and tightness of the known combination of container and insertable closure unit are satisfactory, at least for short-term use with the closure unit inserted. If the container with the closure unit inserted is in use for a long time, the cardboard layer of the container wall in the area of the opening where the coating is interrupted is soaked with liquid. As a result, the tightness between the container and the closure unit deteriorates and it also does not look nice.
  • the inner holding means function precisely the combination.
  • the inner holding means are designed such that they do not regularly run around the circumference of the pouring part, but that they are pronounced where forces act on the container and pouring part when opening and closing the inserted closure unit, and that they are not present where there are no such forces.
  • the force required to insert the closure unit into the container opening is further reduced by not designing the entire inner holding means as a catch, but only a minimal part of it, while the remaining part is designed as a holding lip or lips which are not pressed into the opening, but pushed laterally under the edge of the container wall, which also further minimizes the deformation of this edge.
  • the edge of the container wall around the opening is improved, in particular for a container made of coated cardboard, in that the coating is guided completely around this edge. This prevents liquid from being sucked up in the region of this edge.
  • Figures 1 to 3 show the principle of the closure unit (shown in the closed state) according to the prior art.
  • the sealing unit is not shown in all details, only the important parts are shown.
  • Figure 1 shows the closure unit as a plan view, only the outline of the closure part 1 with hinge 11 and opposite opening lip 12 is shown and as dashed lines A and B the edge of the container wall around the opening into which the closure unit is inserted, and the circumference of the inner holding means (B) which protrude from this opening inside the container.
  • the two lines A and B run essentially parallel to each other.
  • the elongated shape of the opening in the container wall (and the pouring opening in the pouring part of the closure unit) with the hinge and the opening lip arranged opposite one another along the length of the elongated shape enable good pouring.
  • Figures 2 and 3 are sections through the closure unit according to Figure 1, cut along section line II-II ( Figure 2) and along section line III-III ( Figure 3) of Figure 1, that is cut through the hinge position and opening lip position ( Figure 2) and in the middle and perpendicular to it ( Figure 3). They show the closure unit with closure part 1 and pouring part 2 connected by a hinge 11.
  • the closure unit is inserted into an opening in a container wall 3.
  • the pouring part 2 has a neck 21, around which the edge 31 of the container wall 3 lies tightly.
  • the pouring part 2 also has inner holding means in the form of a catch 22 which projects beyond the opening on the inside of the container.
  • the catch 22 shows a sliding surface 23, a locking edge 24 (line B in FIG. 1) and a holding surface 25 which leads against the neck 21.
  • the pouring part also has outer holding means, which the opening on the outside of the container tower over. Since the outer holding means do not influence the plug-in characteristics of the closure unit, they do not have to be described in detail here.
  • the inner holding surface 25 and the outer holding means together determine the position of the container wall relative to the pouring part (inner and outer holding surfaces C and C ').
  • the opening in the container wall before inserting the closure unit is slightly smaller than the cross-section of the neck, such that the edge 31 of the container wall 3 is pressed against the neck of the inserted closure unit, thereby increasing the tightness.
  • FIGS. 2 and 3 show that the inner holding means of the plug-in closure unit according to the prior art run around the outer circumference of the closure unit in the same shape.
  • the closure unit is inserted into the container opening by positioning the inner edge of the sliding surface in the opening and then pressing the closure unit into the opening with a force which acts essentially in the center of the closure unit and acts essentially perpendicular to the container wall.
  • FIGS. 4 to 6 show the closure unit of a combination according to the invention in the same representation, in which Figures 1 to 3 show the closure unit according to the prior art.
  • the same parts are identified by the same reference numbers.
  • the most important feature of the closure unit according to FIGS. 4 to 6 are the inner holding means, which are provided only in the hinge position and in the opening lip position relative to the hinge position. This means that the pouring part of the inserted closure unit only projects beyond the container opening in these two positions. This can be seen from the lines A (edge of the container wall) and B (inner holding means which protrude beyond the opening) of FIG. 4. It can also be seen from a comparison of FIG. 5, in which parts (inner holding means) of the pouring part 2 inside of the container reach over the opening, and FIG. 6, in which no parts extend inside the container over the opening.
  • FIG. 5 shows a retaining lip 26 in the opening lip position and a catch 22 in the hinge position.
  • the holding lip 26 differs from the catch 22 in that it protrudes further over the opening and in that it has no sliding surface.
  • a closure unit with a retaining lip 26 and a catch 22 is inserted into the container wall opening by first pushing the retaining lip 22 laterally under the wall edge and then pressing the catch 22 into the opening. Since the catch is narrow (extension parallel to the edge of the container wall), this type of insertion requires only a small force and therefore leads to only a slight wall deformation, so that overflow of the container contents can be avoided.
  • the different design of the inner holding means in the hinge and in the opening lip position is not an essential feature of the closure unit of the combination according to the invention.
  • the inner holding means can also be designed as a catch in both positions.
  • the closure unit according to FIGS. 4 to 6 has very good pouring properties if the pouring opening and the container opening have an elongated shape, as shown in FIGS. 1 to 6.
  • differently shaped openings for example round openings, are also conceivable.
  • FIGS. 7 and 8 show in detail an exemplary embodiment of a plug-in closure unit in which the principles described with reference to FIGS. 4 to 6 are applied and further developed for further advantageous properties.
  • FIG. 7 shows the closure unit in section (section analogous to FIG. 5, ie through the hinge and opening lip position) and shows the closure part 1 and the pouring part 2.
  • the inner holding means are again designed as holding lip 26 and catch 22 with sliding surface 23, the inner holding means determine the inner holding level C.
  • the pouring part also has outer holding means which define an outer holding plane C '. It is advantageous to design the outer holding means such that the inner (C) and the outer (C ′) holding plane are not parallel to one another such that the neck 21 is higher in the hinge or position of the detent than in the opening lips - or holding lip position and thus in the hinge position offers enough space for a more deformed container wall edge. With a neck designed in this way, the position of the inserted closure unit is defined with sufficient precision and yet it is unlikely that the edge of the container wall will be deformed to such an extent that it covers the catch, which would have a negative effect on the tightness between the closure unit and the container wall in this area.
  • the pouring part extends less far into the container in the opening lip position than in the hinge position, that is, a plane D which delimits the pouring part inside the container does not run parallel to the inner holding plane C, ie not parallel to the container wall.
  • the pouring part in the opening lip position can be equipped with a pouring lip 27 which rises less and less above the container wall against the hinge position. Such a pouring lip 27 considerably improves the pouring properties of the closure unit.
  • closure part 1 and pouring part 2 such that the closed, inserted closure unit on the outside of the container is essentially delimited by a plane E, the plane E being parallel to the plane D and the hinge 11 parallel to the cutting line of the outer holding plane C 'and the plane E is arranged.
  • FIG. 8 further illustrates the closure unit according to FIG. 7, wherein it is shown here in the open state, viewed from above (against the outside of the container).
  • the same parts are identified by the same reference numbers as in the preceding figures. Figure 8 needs no further explanation.
  • the closure unit for the combination of container and closure unit according to the invention advantageously consists of a thermoplastic material and is produced using an injection molding process.
  • the hinge 11 is designed as a thin and therefore sufficiently flexible material zone, a so-called film hinge.
  • the inner side of the pouring lip 27 can be equipped with channels 28 which favor the backflow of liquid remaining on the lip.
  • the sliding surface 23 of the catch 22 can be interrupted for a ventilation opening 29, which improves the pouring properties.
  • FIG. 9 shows the circumference A of the neck cross section projected one above the other and the container opening F before the closure unit is inserted.
  • the opening is generally smaller than the neck cross-section.
  • the edge of the container wall is pressed against the neck of the inserted closure unit, thereby guaranteeing tightness.
  • the two lines A and F are not parallel to each other. While the shape of the opening (line F) consists of two arches with different radii and two straight sections, the The circumference of the neck cross-section does not consist of straight parts, but only consists of arches with different radii. It has been shown that such a shape of the neck cross section is advantageous since regions in which an arc adjoins a straight line tensions the edge of the container wall more strongly.
  • the size difference between the opening and the neck cross-section has to be adapted to the quality of the container wall.
  • the figure shows an opening of 21mm length in a container made of coated cardboard with 250ml content (magnification approx. 1: 6.4).
  • the opening in the container wall is also improved, in particular for containers made of coated cardboard.
  • FIG. 10 shows a cross section through such a container wall in the area of a potential opening, as is known from containers made of coated cardboard.
  • the wall material is a laminated material and consists, for example, of 5 layers: outer cover layer 4, cardboard 5, intermediate layer 6, gas and aroma barrier layer 7 and inner cover layer 8.
  • the cardboard 5 gives the container wall the necessary mechanical strength.
  • the cover layers 4 and 8 are usually made of polyethylene and make the wall liquid-tight.
  • the gas and aroma barrier layer 7 consists, for example, of aluminum and is fastened to the cardboard 5 by means of the intermediate layer 6 (for example made of polyethylene). Layers 6 and 7 may also be missing.
  • the potential opening according to the prior art is produced by punching out an opening in the cardboard (layer 5 or layers 5, 6 and 7) before the cover layers are laminated on. Between punching In the opening and the lamination of the cover layers 4 and 8, a piece of film 9 (for example aluminum foil) is usually welded over the inside of the opening. After the covering layers 4 and 8 have been laminated on, a peel-off strip 10 is applied on the outside over the potential opening, this being welded onto the outer covering layer 4 (weld 100).
  • the opening is usually made in the area of a container edge. The peel strip 10 extends over this edge, while the weld 100 only extends to the edge, in such a way that the peel strip can be gripped to tear open the opening.
  • the pull-off strip 10 is torn away, a part of the outer covering layer 4, a part of the inner covering layer 8 and the aluminum foil 9 being entrained. It is obvious that the edge 51 of the carton 5 is thereby exposed and in particular is exposed to disadvantageous contact with the contents of the container.
  • FIG. 11 shows an improved container wall with a potential opening.
  • the wall again consists of the layers 4 to 8 already described.
  • a first opening is punched into the cardboard layer 5.
  • the other layers (4, 6, 7, 8) are laminated together with the perforated cardboard.
  • the further layers 4 and 6-8 span the first opening and adhere to one another in their regions as well as in other regions of the laminated material.
  • a line-shaped weak point 41 is then embossed into the layers stretched over the first opening, which runs inside and essentially parallel to the first opening and outlines a potential second opening that is smaller than the first opening.
  • This potential second opening is opened by breaking the layers stretched over the first opening along the weak point 41, when the closure unit is pressed against it.
  • the edge of the box remains covered with at least one cover layer, so that no liquid can be sucked into the box.
  • FIG. 12 shows a further embodiment of a container wall with a potential opening.
  • the laminated wall material is the same as already shown in Figures 10 and 11 (layers 4 to 8).
  • a first opening is punched into layers 5 to 7, then cover layers 4 and 8 are laminated on both sides, then a line-shaped weak point 41 is embossed, which defines a potential second opening, which second opening is smaller than the first.
  • the potential second opening is covered with a pull tab 10. Care must be taken to ensure that the peel strip 10 is only welded to the outer cover layer 4 within the weak point 41. When the peel strip 10 is torn off, the two covering layers 4 and 8 are broken along the weak point 41 and the piece within the weak point is removed with the peel strip.
  • FIG. 13 shows a further embodiment of a container wall with a potential opening.
  • the opening is made by punching a first opening into the cardboard (layers 5, 6, 7), then laminating the cover layers 4 and 8 over the first opening, punching a second opening into the layers stretched over the first opening, the second The opening is smaller than the first opening, and the second opening is reclosed by welding a peel strip 10 onto the outer cover layer 4 in the region between the first and the second opening.
  • care must be taken that the peel strip adheres less to the cover layer 4 than it does to the inner cover layer 8, since this is the only way to ensure that when the pull-off strip 10 is torn away, neither the cover layers 4 and 8 nor their connection around the second opening are damaged and the cardboard edge is thus exposed.
  • This can be achieved, for example, by the pulling strip 10 or at least that layer of the pulling strip which is directed against the container being made of aluminum which adheres less strongly to polyethylene than polyethylene to polyethylene (layers 4 and 8).
  • FIG. 14 shows a further way of attaching a pull-off strip 10.1 in the area of a potential opening, for example, as shown, at the potential opening according to FIG. 12.
  • the pull-off strip 10.1 has a peeling film 102, the characteristic of which, facing the container wall that it adheres only so strongly to the outer cover layer that it can be detached from it by a peeling movement, while it adheres more strongly to the material of the pull-off strip.
  • the peeling film has an opening in a central position of the pull-off strip, which is smaller than the potential second opening in the container wall.
  • the peel strip is now attached to the potential second opening in such a way that the opening in the peeling film comes to lie within the weak point 41.
  • Such a peeling strip is peeled off from the container wall, the covering layers 4 and 8, which are broken along the weak point 41, being removed with it in the region of the peeling film opening.
  • the cardboard edge remains covered by the cover layers 4 and 8.
  • FIGS. 11 to 14 can also be combined with one another in a different way than described.
  • the described improvements regarding a potential opening in a container wall are not only advantageous for laminated container wall materials that contain a cardboard layer, but generally for such materials that contain a layer that is sensitive to contact with the contents of the container or that can have a negative influence on the contents of the container. If the potential opening described is used, direct contact between this layer and the contents of the container is avoided in any case.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cartons (AREA)
  • Closures For Containers (AREA)
EP95810281A 1994-06-10 1995-04-28 Récipient pourvu d'un élément de fermeture insérable Expired - Lifetime EP0686568B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH01837/94A CH687252A5 (de) 1994-06-10 1994-06-10 Gebinde mit einsteckbarer Verschlusseinheit.
CH1837/94 1994-06-10
CH183794 1994-06-10

Publications (3)

Publication Number Publication Date
EP0686568A2 true EP0686568A2 (fr) 1995-12-13
EP0686568A3 EP0686568A3 (fr) 1996-01-10
EP0686568B1 EP0686568B1 (fr) 1999-07-14

Family

ID=4219762

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810281A Expired - Lifetime EP0686568B1 (fr) 1994-06-10 1995-04-28 Récipient pourvu d'un élément de fermeture insérable

Country Status (9)

Country Link
US (1) US5632440A (fr)
EP (1) EP0686568B1 (fr)
JP (1) JP3509295B2 (fr)
AT (1) ATE182114T1 (fr)
AU (1) AU694182B2 (fr)
CA (1) CA2151167A1 (fr)
CH (1) CH687252A5 (fr)
DE (1) DE59506381D1 (fr)
RU (1) RU2146215C1 (fr)

Cited By (3)

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Publication number Priority date Publication date Assignee Title
WO1997038910A1 (fr) * 1996-04-16 1997-10-23 Tetra Laval Holdings & Finance S.A. Agencement d'ouverture destine a des contenants d'emballage
WO1998018684A1 (fr) * 1996-10-31 1998-05-07 Tetra Laval Holdings & Finance S.A. Dispositif d'ouverture fourni sur un materiau d'emballage en feuille
EP1125851A1 (fr) * 2000-01-31 2001-08-22 Friesland Brands B.V. Bec verseur avec prévention de l'obstruction

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US6467238B1 (en) * 2000-06-15 2002-10-22 Tetra Laval Holdings & Finance, Sa Direct injection molded closure and method therefor
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IT1320858B1 (it) * 2000-12-12 2003-12-10 Tetra Laval Holdings & Finance Confezione sigillata di tipo perfezionato per prodotti alimentariversabili.
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DE4015119A1 (de) * 1989-07-10 1991-01-31 Pkl Verpackungssysteme Gmbh Quaderfoermige giebelpackung mit im bereich des flachdachs angebrachtem ausgiesser
US5065938A (en) * 1989-09-11 1991-11-19 Champion International Corporation Gable top carton with resealable pour spout
US5108029A (en) * 1990-02-16 1992-04-28 Capitol Spouts, Inc. Reclosable attachment for containers
DK0577867T3 (da) * 1992-07-06 1996-05-06 Procter & Gamble Aseptiske væskeemballeringsbeholdere med genoplukkelig åbning

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997038910A1 (fr) * 1996-04-16 1997-10-23 Tetra Laval Holdings & Finance S.A. Agencement d'ouverture destine a des contenants d'emballage
WO1998018684A1 (fr) * 1996-10-31 1998-05-07 Tetra Laval Holdings & Finance S.A. Dispositif d'ouverture fourni sur un materiau d'emballage en feuille
RU2198120C2 (ru) * 1996-10-31 2003-02-10 Тетра Лаваль Холдингз Энд Файнэнс С.А. Открывное приспособление для прикрепления к отверстию на листе упаковочного материала и упаковочный контейнер
CN1105067C (zh) * 1996-10-31 2003-04-09 利乐拉瓦尔集团及财务有限公司 设置在包装片材上的开口装置和包装容器
EP1125851A1 (fr) * 2000-01-31 2001-08-22 Friesland Brands B.V. Bec verseur avec prévention de l'obstruction

Also Published As

Publication number Publication date
AU1783995A (en) 1995-12-21
US5632440A (en) 1997-05-27
JPH0853150A (ja) 1996-02-27
AU694182B2 (en) 1998-07-16
CA2151167A1 (fr) 1995-12-11
EP0686568B1 (fr) 1999-07-14
JP3509295B2 (ja) 2004-03-22
RU2146215C1 (ru) 2000-03-10
ATE182114T1 (de) 1999-07-15
DE59506381D1 (de) 1999-08-19
EP0686568A3 (fr) 1996-01-10
CH687252A5 (de) 1996-10-31

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