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EP3250465B1 - Method of manufacturing a bag with a rigid frame - Google Patents

Method of manufacturing a bag with a rigid frame Download PDF

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Publication number
EP3250465B1
EP3250465B1 EP16705229.9A EP16705229A EP3250465B1 EP 3250465 B1 EP3250465 B1 EP 3250465B1 EP 16705229 A EP16705229 A EP 16705229A EP 3250465 B1 EP3250465 B1 EP 3250465B1
Authority
EP
European Patent Office
Prior art keywords
bag
bellows
rigid frame
walls
wall
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.)
Active
Application number
EP16705229.9A
Other languages
German (de)
French (fr)
Other versions
EP3250465A1 (en
Inventor
Eric Valette
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.)
Coveris Flexibles France SA
Original Assignee
Coveris Flexibles France 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 Coveris Flexibles France SA filed Critical Coveris Flexibles France SA
Priority to PL16705229T priority Critical patent/PL3250465T3/en
Publication of EP3250465A1 publication Critical patent/EP3250465A1/en
Application granted granted Critical
Publication of EP3250465B1 publication Critical patent/EP3250465B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/16—End- or aperture-closing arrangements or devices
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2072—Mechanical means
    • B65D77/2076—Mechanical means provided by the cover itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/84—Forming or attaching means for filling or dispensing contents, e.g. valves or spouts
    • B31B70/844—Applying rigid valves, spouts, or filling tubes
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/20—Shape of flexible containers with structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming

Definitions

  • the invention relates to the technical sector of plastic packaging bags.
  • the invention relates to a preformed flexible plastic bag of thickness less than 200 microns, comprising a front wall and a rear wall assembled at their lateral sides, in combination with bellows, and delimiting a bottom and a filling opening.
  • these preformed bags are made, continuously, from a single plastic film, such as PE with or without PP, or PE added with PET, or any other material perfectly known to a man of the art. profession, employed in the field of food packaging, in particular.
  • the plastic film is subjected, continuously, to successive operations of folding and welding to produce a bag with a bottom, two walls joined with bellows, and a filling opening opposite to the bottom.
  • the outer plies are usually joined by weld lines.
  • the bottom of the bag can be formed continuously, by welding, being folded down and fixed on one of the walls of the bag. Other embodiments may be envisaged.
  • the document FR 2 929 247 also discloses a method of manufacturing a bag from a plastic film, wherein the film is subjected to successive bending operations, to achieve lateral bellows between two walls; cross-cutting the film according to the desired height of the bag; externally flap the open transverse end of one of the walls, so as to open the bellows and position them flat forming a triangle; the inner face of the folded wall portion is attached to and fixed on the inner face of the bellows arranged in a triangle and on the internal face of the other wall, a plate capable of acting as a bottom and presenting means for temporary opening and closing from which the contents of the bag can be emptied.
  • the problem to be solved by the invention is to be able to equip a bag, which is already preformed and made of a flexible plastic material, with a rigid frame.
  • the invention applies to all types of bags, preformed, made of flexible plastic material, with a thickness of less than 200 microns, and obtained from a roll of film unrolled continuously, and subjected to various operations of bends and welds, made automatically.
  • the packaging bag is made before being filled, in opposition to the plastic bags obtained on a machine of the FFS type, that is to say, made from a vertical sheath, the bag as such, being made as filling.
  • the bag designated as a whole by (1) and produced, as indicated, in all types of flexible plastics with a thickness of less than 200 microns and comprises a front wall (1a) and a rear wall (1b). assembled at their lateral sides, in combination with bellows (1c) and (1d).
  • the bag (1) has a bottom (1e) and a filling opening (1f).
  • part of the bag (1) which is therefore preformed, has arrangements for fixing a rigid frame (2), able to define an opening in communication with the inside of the bag.
  • the frame (2) can advantageously be equipped with a closure means (2a).
  • the frame (2) is fixed at the opening (1f). Not covered by the invention is the attachment of the frame (2), in relation to the bottom (the) ( figure 4 ), or with one of the walls (1a) and / or (1b), which in this case has (or) in the case of weakening cutouts to create an opening corresponding to the geometry of the frame (2).
  • the frame (2) is advantageously equipped, as indicated, with a closure means (2a), of the cover type.
  • a closure means (2a) of the cover type.
  • the rigid frame (2) is fixed at the filling opening of the bag.
  • the plastic film is continuously subjected to successive welding operations to produce the bag with the bottom (1c) and the two walls (1a) and (1b) joined by the bellows (1c) and (1d). ).
  • a cross section (3) of one of the walls (1b) is produced at a determined distance from the bottom corresponding to the desired height of the bag.
  • the open transverse end of the wall (1b) is then externally folded so as to open the bellows (1c) and (1d) and position them flat, forming a triangle, (1c1) and (1d1).
  • the frame (2) is then attached and fixed, by any known and appropriate means, on the edge of the inner face (1b1) of the folded wall (1b) on the edges of the inner face of the bellows arranged in a triangle (1c1) and (1d1), and on the edge of the inner face along the bottom (1e), of the uncut wall (1a).
  • the frame (2) has a generally rectangular shape. Its length substantially corresponds to the width of the bag, while its width substantially corresponds to the width of the bellows (1c) and (1d).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

L'invention se rattache au secteur technique des sacs d'emballage en matière plastique.The invention relates to the technical sector of plastic packaging bags.

Plus particulièrement, l'invention concerne un sac préformé en matière plastique flexible, d'épaisseur inférieure à 200 Microns, comprenant une paroi avant et une paroi arrière assemblées au niveau de leurs côtés latéraux, en combinaison avec des soufflets, et délimitant un fond et une ouverture de remplissage. Généralement, ces sacs préformés sont réalisés, en continu, à partir d'un seul film en matière plastique, tels que du PE additionné ou non de PP, ou bien du PE additionné de PET, ou toutes autres matières parfaitement connues pour un homme du métier, employées dans le domaine de l'emballage alimentaire, notamment.More particularly, the invention relates to a preformed flexible plastic bag of thickness less than 200 microns, comprising a front wall and a rear wall assembled at their lateral sides, in combination with bellows, and delimiting a bottom and a filling opening. Generally, these preformed bags are made, continuously, from a single plastic film, such as PE with or without PP, or PE added with PET, or any other material perfectly known to a man of the art. profession, employed in the field of food packaging, in particular.

Le film en matière plastique est soumis, en continu, à des opérations successives de pliage et de soudage pour réaliser un sac avec un fond, deux parois réunies avec des soufflets, et une ouverture de remplissage opposée au fond. Les plis externes sont généralement assemblés par des lignes de soudures. Le fond du sac peut être formé en continu, par soudure, en étant rabattu et fixé sur l'une des parois du sac. D'autres modes de réalisation peuvent être envisagés.The plastic film is subjected, continuously, to successive operations of folding and welding to produce a bag with a bottom, two walls joined with bellows, and a filling opening opposite to the bottom. The outer plies are usually joined by weld lines. The bottom of the bag can be formed continuously, by welding, being folded down and fixed on one of the walls of the bag. Other embodiments may be envisaged.

On a proposé également, dans le domaine de l'emballage, d'équiper l'ouverture de remplissage du sac, ou parfois le fond, d'un couvercle en plastique rigide. Toutefois, cette solution est limitée à des sacs en matière plastique rigide, ou en papier renforcé, ou encore, à des sacs en matière plastique, flexible ou rigide, réalisés, non pas en continu à partir d'un seul film en matière plastique, comme indiqué, mais sur une machine de remplissage, du type FFS, à partir d'un film de matière plastique.It has also been proposed, in the field of packaging, to equip the filling opening of the bag, or sometimes the bottom, with a rigid plastic lid. However, this solution is limited to rigid plastic bags, or reinforced paper, or to plastic bags, flexible or rigid, made, not continuously from a single plastic film, as shown, but on a filling machine, type FFS, from a plastic film.

On peut citer, par exemple, l'enseignement des documents WO 2009/021156 et WO 2010/054226 .For example, the teaching of documents WO 2009/021156 and WO 2010/054226 .

Le document FR 2 929 247 décrit aussi un procédé de fabrication d'un sac à partir d'un film en matière plastique, selon lequel on soumet le film à des opérations de pliages successifs, pour réaliser des soufflets latéraux entre deux parois; on coupe transversalement le film en fonction de la hauteur désirée du sac; on rabat extérieurement l'extrémité transversale ouverte de l'une des parois, de manière à ouvrir les soufflets et les positionner à plat en formant un triangle; on rapporte et on fixe sur la face interne de la partie de paroi rabattue, sur la face interne des soufflets disposés en triangle et sur la face interne de l'autre paroi, une plaque apte à faire office de fond et présentant des moyens d'ouverture et de fermeture temporaires à partir desquels peut être vidé le contenu du sac.The document FR 2 929 247 also discloses a method of manufacturing a bag from a plastic film, wherein the film is subjected to successive bending operations, to achieve lateral bellows between two walls; cross-cutting the film according to the desired height of the bag; externally flap the open transverse end of one of the walls, so as to open the bellows and position them flat forming a triangle; the inner face of the folded wall portion is attached to and fixed on the inner face of the bellows arranged in a triangle and on the internal face of the other wall, a plate capable of acting as a bottom and presenting means for temporary opening and closing from which the contents of the bag can be emptied.

A partir de cet état de la technique, le problème que se propose de résoudre l'invention est de pouvoir équiper un sac, qui est déjà préformé et réalisé dans une matière plastique flexible, d'un cadre rigide.From this state of the art, the problem to be solved by the invention is to be able to equip a bag, which is already preformed and made of a flexible plastic material, with a rigid frame.

L'invention concerne, par conséquent, un procédé de fabrication d'un sac équipé d'un cadre rigide, à partir d'un film en matière plastique, notamment en PET/PE, d'épaisseur inférieure à 200 Microns, procédé selon lequel :

  • on soumet en continu le film en matière plastique à des opérations successives de pliage et de soudage, pour réaliser un sac avec un fond et deux parois réunies par des soufflets,
  • on réalise, à une distance déterminée du fond correspondant à la hauteur souhaitée du sac, une coupe transversale de l'une des parois et des soufflets,
  • on rabat extérieurement l'extrémité transversale ouverte de la paroi découpée, de manière à ouvrir les soufflets et à les positionner à plat en formant un triangle,
  • on rapporte et on fixe le cadre rigide sur les bords de la face interne de la paroi rabattue, sur les bords de la face interne des soufflets disposés en triangle, et sur le bord de la face interne de la paroi non découpée considéré le long du fond d'un sac suivant.
The invention therefore relates to a method of manufacturing a bag equipped with a rigid frame, from a plastic film, in particular PET / PE, with a thickness of less than 200 microns, according to which process:
  • the plastic film is continuously subjected to successive operations of folding and welding, to produce a bag with a bottom and two walls joined by bellows,
  • at a determined distance from the bottom corresponding to the desired height of the bag, a transverse section of one of the walls and the bellows is produced,
  • the open transverse end of the cut wall is externally folded so as to open the bellows and to position them flat in a triangle,
  • the rigid frame is attached to and fixed on the edges of the internal face of the folded wall, on the edges of the internal face of the bellows arranged in a triangle, and on the edge of the internal face of the undivided wall considered along the bottom of a next bag.

Il résulte de ces caractéristiques que la mise en place du cadre rigide s'effectue pendant l'opération de formation du sac.It follows from these characteristics that the establishment of the rigid frame is performed during the bag forming operation.

L'invention est exposée ci-après plus en détail à l'aide des figures des dessins annexés dans lesquels :

  • la figure 1 est une vue en perspective d'un sac préformé en matière plastique flexible obtenu par un procédé de fabrication en continu, et avant mise en place d'un cadre rigide, au niveau de son ouverture de remplissage,
  • la figure 2 est une vue correspondant à la figure 1, après mise en place du cadre rigide,
  • la figure 3 est une vue correspondant à la figure 2, montrant l'ouverture d'un couvercle équipant le cadre rigide,
  • la figure 4 est une vue en perspective d'un sac préformé en matière plastique flexible, dont le fond est équipé d'un cadre rigide.
  • Les figures 5, 6 et 7 sont des figures à caractère schématique, montrant le principe de pose et de fixation du cadre rigide, au niveau de l'ouverture du sac, et au fur et à mesure de sa formation en continu.
The invention is described below in more detail with reference to the figures of the accompanying drawings, in which:
  • the figure 1 is a perspective view of a preformed flexible plastic bag obtained by a continuous manufacturing process, and before the introduction of a rigid frame, at its filling opening,
  • the figure 2 is a view corresponding to the figure 1 after setting up the rigid frame,
  • the figure 3 is a view corresponding to the figure 2 , showing the opening of a lid equipping the rigid frame,
  • the figure 4 is a perspective view of a preformed flexible plastic bag, whose bottom is equipped with a rigid frame.
  • The Figures 5, 6 and 7 are figures of a schematic nature, showing the principle of laying and fixing the rigid frame, at the opening of the bag, and as and when its formation continuously.

Comme indiqué, l'invention s'applique à tous types de sacs, préformés, en matière plastique flexible, d'épaisseur inférieure à 200 Microns, et obtenus à partir d'une bobine de film déroulé en continu, et soumis à différentes opérations de pliages et de soudures, réalisés en automatique.As indicated, the invention applies to all types of bags, preformed, made of flexible plastic material, with a thickness of less than 200 microns, and obtained from a roll of film unrolled continuously, and subjected to various operations of bends and welds, made automatically.

Autrement dit, avec ce procédé de fabrication, le sac d'emballage est réalisé avant d'être rempli, en opposition aux sacs en matière plastique obtenus sur une machine du type FFS, c'est-à-dire, réalisés à partir d'une gaine verticale, le sac en tant que tel, étant réalisé au fur et à mesure du remplissage.In other words, with this manufacturing method, the packaging bag is made before being filled, in opposition to the plastic bags obtained on a machine of the FFS type, that is to say, made from a vertical sheath, the bag as such, being made as filling.

De manière parfaitement connue, le sac désigné dans son ensemble par (1) et réalisé, comme indiqué, dans tous types de matières plastiques flexibles d'épaisseur inférieures à 200 Microns et comprend une paroi avant (1a) et une paroi arrière (1b) assemblées au niveau de leurs côtés latéraux, en combinaison avec des soufflets (1c) et (1d). En outre, le sac (1) présente un fond (1e) et une ouverture de remplissage (1f).In a perfectly known manner, the bag designated as a whole by (1) and produced, as indicated, in all types of flexible plastics with a thickness of less than 200 microns and comprises a front wall (1a) and a rear wall (1b). assembled at their lateral sides, in combination with bellows (1c) and (1d). In addition, the bag (1) has a bottom (1e) and a filling opening (1f).

Selon l'invention, une partie du sac (1), qui par conséquent est préformé, présente des agencements pour la fixation d'un cadre rigide (2), apte à délimiter une ouverture en communication avec l'intérieur du sac. Le cadre (2) peut, avantageusement, être équipé d'un moyen d'obturation (2a).According to the invention, part of the bag (1), which is therefore preformed, has arrangements for fixing a rigid frame (2), able to define an opening in communication with the inside of the bag. The frame (2) can advantageously be equipped with a closure means (2a).

Le cadre (2) est fixé, au niveau de l'ouverture (1f). Non couvert par l'invention est la fixation du cadre (2), en relation avec le fond (le) (figure 4), ou avec l'une des parois (1a) et/ou (1b), laquelle ou lesquelles présente(nt) dans ce cas des découpes d'affaiblissement pour créer une ouverture correspondant à la géométrie du cadre (2).The frame (2) is fixed at the opening (1f). Not covered by the invention is the attachment of the frame (2), in relation to the bottom (the) ( figure 4 ), or with one of the walls (1a) and / or (1b), which in this case has (or) in the case of weakening cutouts to create an opening corresponding to the geometry of the frame (2).

Le cadre (2) est avantageusement équipé, comme indiqué, d'un moyen d'obturation (2a), du type couvercle. On renvoie aux figures 1, 2 et 3.The frame (2) is advantageously equipped, as indicated, with a closure means (2a), of the cover type. We refer to Figures 1, 2 and 3 .

Un procédé non couvert par l'invention pour équiper un sac préformé, à partir d'un film en matière plastique flexible, par exemple en PET/PE, d'épaisseur inférieure à 200 Microns, d'un cadre rigide (2) comprend les étapes essentielles suivantes :

  • on soumet en continu le film en matière plastique à des opérations successives de pliage et de soudage, pour réaliser le sac (1) avec le fond (1e) et les deux parois (1a) et (1b), réunies par les soufflets (1c) et (1d), et une ouverture de remplissage (1f), opposée au fond (le).
  • on agence l'ouverture de remplissage (1f), ou le fond (1e), ou l'une quelconque des parois (1a) et (1b), pour permettre la fixation du cadre rigide (2).
A method not covered by the invention for equipping a preformed bag, from a flexible plastic film, for example PET / PE, less than 200 microns thick, a rigid frame (2) comprises the following essential steps:
  • the plastic film is continuously subjected to successive operations of folding and welding, to produce the bag (1) with the bottom (1e) and the two walls (1a) and (1b), joined by the bellows (1c) and (1d), and a filling opening (1f), opposite the bottom (the).
  • arranging the filling opening (1f), or the bottom (1e), or any of the walls (1a) and (1b), to allow the fixing of the rigid frame (2).

Dans une autre forme de réalisation avantageuse selon l'invention, le cadre rigide (2) est fixé au niveau de l'ouverture de remplissage du sac.In another advantageous embodiment according to the invention, the rigid frame (2) is fixed at the filling opening of the bag.

Dans ce but, on soumet en continu le film en matière plastique à des opérations successives de soudage pour réaliser le sac avec le fond (le) et les deux parois (1a) et (1b) réunies par les soufflets (1c) et (1d).For this purpose, the plastic film is continuously subjected to successive welding operations to produce the bag with the bottom (1c) and the two walls (1a) and (1b) joined by the bellows (1c) and (1d). ).

On réalise à une distance déterminée du fond correspondant à la hauteur souhaitée du sac, une coupe transversale (3) de l'une des parois (1b).A cross section (3) of one of the walls (1b) is produced at a determined distance from the bottom corresponding to the desired height of the bag.

On rabat ensuite extérieurement l'extrémité transversale ouverte de la paroi (1b), de manière à ouvrir les soufflets (1c) et (1d) et les positionner à plat, en formant un triangle, (1c1) et (1d1). Le cadre (2) est ensuite rapporté et fixé, par tous moyens connus et appropriés, sur le bord de la face interne (1b1) de la paroi rabattue (1b) sur les bords de la face interne des soufflets disposés en triangle (1c1) et (1d1), et sur le bord de la face interne le long du fond (1e), de la paroi non découpée (1a). On renvoie aux figures 5, 6 et 7.The open transverse end of the wall (1b) is then externally folded so as to open the bellows (1c) and (1d) and position them flat, forming a triangle, (1c1) and (1d1). The frame (2) is then attached and fixed, by any known and appropriate means, on the edge of the inner face (1b1) of the folded wall (1b) on the edges of the inner face of the bellows arranged in a triangle (1c1) and (1d1), and on the edge of the inner face along the bottom (1e), of the uncut wall (1a). We refer to Figures 5, 6 and 7 .

Le cadre (2) a une forme générale rectangulaire. Sa longueur correspond sensiblement à la largeur du sac, tandis que sa largeur correspond sensiblement à la largeur des soufflets (1c) et (1d).The frame (2) has a generally rectangular shape. Its length substantially corresponds to the width of the bag, while its width substantially corresponds to the width of the bellows (1c) and (1d).

Il résulte donc de ce procédé de fabrication, que la mise en place du cadre rigide s'effectue au fur et à mesure de la formation en continu du sac, après découpe de l'une des parois et après avoir ouvert les soufflets au niveau de la découpe transversale réalisée sur l'une des parois seulement du sac.It follows therefore from this manufacturing process, that the setting up of the rigid frame takes place as and when the continuous formation of the bag, after cutting one of the walls and after opening the bellows at the level of the transverse cut made on one of the walls only of the bag.

Il apparaît, donc, que la mise en place du cadre rigide (2) s'effectue en continu au fur et à mesure de la formation du sac réalisé dans une matière plastique flexible, d'épaisseur inférieure à 200 Microns.It appears, therefore, that the establishment of the rigid frame (2) is carried out continuously as the formation of the bag made of a flexible plastic material, less than 200 microns thick.

Les avantages ressortent bien de la description.The advantages are apparent from the description.

Claims (1)

  1. Method for manufacturing a bag (1) equipped with a rigid frame (2), from a flexible plastic film, in particular of PET/PE, with a thickness of less than 200 Microns, method wherein:
    - the plastic film is continuously subjected to successive folding and sealing operations to produce a bag with a bottom (1e), two walls (1a) and (1b) joined by bellows (1c) and (1d),
    - a cross cut (3) of one of the walls (1b) and bellows (1c) and (1d) is made at a determined distance from the bottom (le) corresponding to the desired height of the bag,
    - the open transverse end of the cut-out wall (1b) is folded down externally so as to open the bellows (1c) and (1d) and position them flat to form a triangle (1c1) and (1d1),
    - the rigid frame (2) is fixed on the edges of the inner side (1b1) of the folded-down wall (1b), on the edges of the inner side of the bellows arranged in a triangle (1c1) and (1d1), and on the edge of the inner side of the uncut wall (1a) considered along the bottom (le) of a subsequent bag.
EP16705229.9A 2015-01-29 2016-01-25 Method of manufacturing a bag with a rigid frame Active EP3250465B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL16705229T PL3250465T3 (en) 2015-01-29 2016-01-25 Method of manufacturing a bag with a rigid frame

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1550697A FR3032185B1 (en) 2015-01-29 2015-01-29 PREFORM BAG OF FLEXIBLE PLASTIC MATERIAL, IN PARTICULAR PET / PE, THICKER THAN 200 MIRONS
PCT/FR2016/050140 WO2016120550A1 (en) 2015-01-29 2016-01-25 Preformed bag made of flexible plastic material and methods for providing a preformed bag from a film made of flexible plastic material with a rigid frame

Publications (2)

Publication Number Publication Date
EP3250465A1 EP3250465A1 (en) 2017-12-06
EP3250465B1 true EP3250465B1 (en) 2019-05-08

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP16705229.9A Active EP3250465B1 (en) 2015-01-29 2016-01-25 Method of manufacturing a bag with a rigid frame

Country Status (13)

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US (1) US20180002092A1 (en)
EP (1) EP3250465B1 (en)
AU (1) AU2016211097A1 (en)
BR (1) BR112017016015A2 (en)
CA (1) CA2975207A1 (en)
DK (1) DK3250465T3 (en)
ES (1) ES2728427T3 (en)
FR (1) FR3032185B1 (en)
PL (1) PL3250465T3 (en)
PT (1) PT3250465T (en)
RU (1) RU2017126663A (en)
TR (1) TR201907177T4 (en)
WO (1) WO2016120550A1 (en)

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Also Published As

Publication number Publication date
FR3032185B1 (en) 2019-05-17
ES2728427T3 (en) 2019-10-24
EP3250465A1 (en) 2017-12-06
RU2017126663A (en) 2019-01-28
TR201907177T4 (en) 2019-06-21
US20180002092A1 (en) 2018-01-04
PT3250465T (en) 2019-05-31
AU2016211097A1 (en) 2017-08-17
PL3250465T3 (en) 2019-09-30
FR3032185A1 (en) 2016-08-05
BR112017016015A2 (en) 2018-03-20
DK3250465T3 (en) 2019-05-20
WO2016120550A1 (en) 2016-08-04
CA2975207A1 (en) 2016-08-04

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