EP2039619B1 - Method of manufacturing a bag using a reel of film made from plastic material - Google Patents

Method of manufacturing a bag using a reel of film made from plastic material Download PDF

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Publication number
EP2039619B1
EP2039619B1 EP08300270A EP08300270A EP2039619B1 EP 2039619 B1 EP2039619 B1 EP 2039619B1 EP 08300270 A EP08300270 A EP 08300270A EP 08300270 A EP08300270 A EP 08300270A EP 2039619 B1 EP2039619 B1 EP 2039619B1
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EP
European Patent Office
Prior art keywords
bag
gussets
strip
walls
plastic film
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EP08300270A
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German (de)
French (fr)
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EP2039619A1 (en
Inventor
Patrick Alaux
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Veriplast Flexible SA
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Veriplast Flexible SA
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    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
    • 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
    • B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames

Definitions

  • the invention relates to the technical sector of plastic packaging bags.
  • the invention relates to the bags of the type having, on their lateral edges, bellows able to increase the capacity of the bag and to improve its stability, in a vertical position.
  • the invention relates to those which make it possible to produce the bags continuously from a single plastic film.
  • the film is subjected to successive bending operations to achieve lateral bellows between two walls.
  • the outer plies thus produced are generally assembled by welding operations.
  • the bottom of the bag is also made continuously by welding, then folded down and attached to one of the walls of the bag.
  • the spacing of the bellows gives volume to the entire bag, and participates in maintaining it in a vertical or substantially vertical position.
  • the bag is intended to receive products of a certain weight, such as animal pellets, after filling the bag can remain in a vertical position.
  • the bag has, on at least one of its walls, a marking line capable of constituting a predetermined fold zone to form and delimit the bottom relative to the walls, in order to improve and facilitate the formation of the support base under the effect of spacing the bellows.
  • a marking line capable of constituting a predetermined fold zone to form and delimit the bottom relative to the walls, in order to improve and facilitate the formation of the support base under the effect of spacing the bellows.
  • the document DE1611680 shows a process corresponding to the preamble of claim 1.
  • process claim 6 of this document one is to position a bottom strip on the inner face of the walls and bellows arranged flat in triangle, then fix it in this position by folding on the outer face of the bottom strip, fixing tabs provided at the lower ends of the walls and bellows.
  • the object of the invention is to remedy these disadvantages in a simple, safe, effective and rational manner.
  • the problem to be solved by the invention is to be able to produce, continuously, from a single plastic film, a bag having, during its manufacture, directly the the bellows while aiming to achieve a bottom that does not have extra thickness to ensure perfect stability in the vertical position of the bag, both empty and after filling with very light products.
  • the bag thus produced after fixing the bottom strip, is made in the middle portion of the strip, over its entire length, a folding line parallel to said bottom.
  • the assemblies are made by flat welding lines.
  • the invention applies to the production of packaging bags (1) obtained from a reel of plastic film, which film is subjected, continuously, to various operations including folding and welding performed automatically.
  • the plastics material used may be, for example, PE added with OPP, or PE added with PET, or any material used in the field of packaging, including food.
  • the film is cut transversely according to the height of the desired bag.
  • the bag therefore has two open transverse ends (1e) and (If).
  • One of the open ends (1e) is shaped and arranged to form the closed upper portion of the bag with or without means for opening and closing.
  • the other open end (1f) is arranged to form the bottom of the bag.
  • the inner face (lbl) of the folded wall (1b) is attached and fixed on the internal face of the bellows arranged in a triangle (1c3), (1d3), and on the internal face (1a1).
  • a strip (2) adapted to act as a bottom.
  • This band (2) has a generally rectangular shape whose length substantially corresponds to the width of the bag, while its width corresponds to the width of the bellows (1c) and (1d).
  • the external folds of the bellows (1c) and (1d) are assembled by a weld line (3).
  • the weld lines (3) are formed on only a portion of the height of the bag at a distance (d) from the transverse end (1f) to be folded. This distance (d) corresponds to the width of a fold of the bellows (1c) and (1d).
  • the bag has a bottom (2) perfectly flat ( figure 2 ), in opposition to the same type of bag obtained according to the state of the art ( figure 1 ) where it is seen that the bottom is made by welding the walls to be folded down and fixed on one of said walls constituting an extra thickness.
  • this extra thickness makes it possible to obtain a bag with a perfectly flat bottom giving it great stability, thus making it possible to fill it with products having a very low weight.
  • a fold line (2a) parallel to said bottom is made in the middle portion of said strip, over its entire length, thus making it possible to package flat. the bag before use.
  • a marking line parallel to the bottom can be made on at least one of the walls, a marking line parallel to the bottom. This marking line is located at a distance from the bottom (2) substantially corresponding to the width of a fold of the bellows.
  • the bottom strip (2) may be made of the same material as the plastic film constituting the bag, or in a different kind of material.

Abstract

The method involves subjecting a plastic film to successive folding operations for forming lateral gussets (1c, 1d) between two walls (1a, 1b). The film is transversely cut according to a desired height of a packaging bag (1). A transversal opened end of the wall (1b) is externally folded to open the gussets and flatly position the gussets by forming a triangle. A plastic band (2), which serves as a bottom, is fixed on an internal surface of a part of the wall (1b), an internal surface of the gussets arranged in the triangle and on an internal surface of the wall (1a).

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 les sacs du type de ceux présentant, sur leurs bords latéraux, des soufflets aptes à augmenter la capacité du sac et à améliorer sa stabilité, en position verticale.More particularly, the invention relates to the bags of the type having, on their lateral edges, bellows able to increase the capacity of the bag and to improve its stability, in a vertical position.

Parmi les différentes possibilités de fabrication, l'invention concerne celles qui permettent de réaliser les sacs en continu à partir d'un seul film en matière plastique. Dans ce cas, d'une manière parfaitement connue pour un homme du métier, le film est soumis à des opérations de pliages successifs pour réaliser des soufflets latéraux entre deux parois. Les plis externes ainsi réalisés sont assemblés généralement par des opérations de soudure. Le fond du sac est également réalisé en continu par soudure, puis rabattu et fixé sur l'une des parois du sac.Among the various manufacturing possibilities, the invention relates to those which make it possible to produce the bags continuously from a single plastic film. In this case, in a manner perfectly known to those skilled in the art, the film is subjected to successive bending operations to achieve lateral bellows between two walls. The outer plies thus produced are generally assembled by welding operations. The bottom of the bag is also made continuously by welding, then folded down and attached to one of the walls of the bag.

L'écartement des soufflets, par exemple, donne du volume à l'ensemble du sac, et participe à son maintien en position verticale ou sensiblement verticale. Lorsque le sac est destiné à recevoir des produits d'un certain poids, tels que des granulés pour animaux, après remplissage le sac peut demeurer en position verticale.The spacing of the bellows, for example, gives volume to the entire bag, and participates in maintaining it in a vertical or substantially vertical position. When the bag is intended to receive products of a certain weight, such as animal pellets, after filling the bag can remain in a vertical position.

Par contre, ce n'est pas le cas lorsque le sac est destiné à être garni de produits très légers tels que, par exemple, des céréales. En effet, en considérant la fabrication automatique du sac et la réalisation du fond qui est rabattu et fixé sur l'une des parois du sac, cette opération de rabattement constitue une surépaisseur nuisant à la stabilité du sac. On renvoie à la figure 1 qui montre un sac avec un fond qui, selon l'état antérieur de la technique, constitue une surépaisseur.By cons, this is not the case when the bag is intended to be lined with very light products such as, for example, cereals. Indeed, considering the automatic manufacture of the bag and the realization of the bottom which is folded down and fixed on one of the walls of the bag, this folding operation is an extra thickness that adversely affects the stability of the bag. We refer to the figure 1 which shows a bag with a bottom which, according to the prior art, constitutes an extra thickness.

C'est ainsi qu'il a été constaté qu'en l'absence de remplissage et après ouverture du sac pour la formation du fond, ce dernier n'est pas stable verticalement, ce qui pose des problèmes importants, non seulement pour son remplissage en automatique sur un convoyeur, mais également après remplissage de produits ne présentant pas un poids suffisant.Thus it was found that in the absence of filling and after opening the bag for the formation of the bottom, it is not vertically stable, which poses significant problems, not only for its filling in automatic on a conveyor, but also after filling of products not having a sufficient weight.

Pour tenter d'améliorer la stabilité du sac en position verticale, notamment lors de son remplissage, une solution ressort de l'enseignement du brevet FR 2833928 dont le demandeur de la présente est également titulaire.In an attempt to improve the stability of the bag in an upright position, particularly during its filling, a solution emerges from the teaching of the patent FR 2833928 which the applicant hereby also holds.

Dans ce but, le sac présente, sur au moins une de ses parois, une ligne de marquage apte à constituer une zone de pliure déterminée pour former et délimiter le fond par rapport aux parois, afin d'améliorer et faciliter la formation de l'embase d'appui sous l'effet d'écartement du soufflet. Toutefois, avec cette solution, le fond du sac en tant que tel constitue toujours une surépaisseur étant donné qu'il résulte d'une partie rabattue fixée sous l'une des parois du sac. Cette solution n'est donc pas satisfaisante, lorsque le sac est destiné à contenir, comme indiqué, des produits très légers tels que des céréales.For this purpose, the bag has, on at least one of its walls, a marking line capable of constituting a predetermined fold zone to form and delimit the bottom relative to the walls, in order to improve and facilitate the formation of the support base under the effect of spacing the bellows. However, with this solution, the bottom of the bag as such is always an extra thickness since it results from a folded portion fixed under one of the walls of the bag. This solution is therefore not satisfactory, when the bag is intended to contain, as indicated, very light products such as cereals.

On a également proposé de réaliser des sacs en matière plastique avec un fond rapporté comme il ressort de l'enseignement des brevets DE 1611680 , JP 2002211582 et EP 0217982 . En particulier It has also been proposed to produce plastic bags with an attached bottom as is apparent from the teaching of patents DE 1611680 , JP 2002211582 and EP 0217982 . In particular

le document DE1611680 montre un procédé correspondant au préambule de la revendication 1. Parmi toutes les variantes possibles que définit la revendication de procédé 6 de ce document, l' une consiste à positionner une bande de fond sur la face interne des parois et des soufflets disposés à plat en triangle, puis de la fixer dans cette position en rabattant sur la face externe de la bande de fond, des languettes de fixation pourvues aux extrémités inférieures des parois et des soufflets.the document DE1611680 shows a process corresponding to the preamble of claim 1. Of all the possible variants defined in process claim 6 of this document, one is to position a bottom strip on the inner face of the walls and bellows arranged flat in triangle, then fix it in this position by folding on the outer face of the bottom strip, fixing tabs provided at the lower ends of the walls and bellows.

L'invention s'est fixée pour but de remédier à ces inconvénients d'une manière simple, sûre, efficace et rationnelle.The object of the invention is to remedy these disadvantages in a simple, safe, effective and rational manner.

A partir de cet état de la technique, le problème que se propose de résoudre l'invention est de pouvoir réaliser, en continu, à partir d'un seul film en matière plastique, un sac présentant, lors de sa fabrication, directement le ou les soufflets tout en ayant pour objectif de réaliser un fond qui ne présente pas de surépaisseur afin d'assurer une parfaite stabilité en position verticale du sac, aussi bien à vide qu'après remplissage avec des produits très légers.From this state of the art, the problem to be solved by the invention is to be able to produce, continuously, from a single plastic film, a bag having, during its manufacture, directly the the bellows while aiming to achieve a bottom that does not have extra thickness to ensure perfect stability in the vertical position of the bag, both empty and after filling with very light products.

Pour résoudre un tel problème, il a été conçu et mis au point un procédé de fabrication d'un sac à partir d'une bobine de film en matière plastique selon les différentes étapes de la revendication 1.To solve such a problem, it has been designed and developed a method of manufacturing a bag from a reel of plastic film according to the different steps of claim 1.

Pour résoudre le problème posé de pouvoir conditionner parfaitement à plat le sac ainsi réalisé, après fixation de la bande de fond, on réalise, dans la partie médiane de la bande, sur la totalité de sa longueur, une ligne de pliage parallèle audit fond.To solve the problem posed of being able to perfectly flat condition the bag thus produced, after fixing the bottom strip, is made in the middle portion of the strip, over its entire length, a folding line parallel to said bottom.

Pour résoudre le problème posé d'améliorer la formation du fond, sous l'effet de l'écartement des soufflets, on réalise, sur l'une au moins des parois, une ligne de marquage parallèle au fond et à une distance dudit fond correspondant sensiblement à la largeur d'un pli des soufflets.To solve the problem of improving the formation of the bottom, under the effect of the spacing of the bellows, is made on at least one of the walls, a marking line parallel to the bottom and at a distance from said corresponding bottom substantially the width of a fold of the bellows.

D'une manière connue, les assemblages sont réalisés par des lignes de soudure à plat.In a known manner, the assemblies are made by flat welding lines.

A partir de cette conception de base :

  • soit la bande de fond est dans le même matériau que le film plastique ;
  • soit la bande de fond est dans un matériau de nature différente de celui du film plastique.
From this basic design:
  • either the bottom strip is in the same material as the plastic film;
  • either the bottom strip is in a material of a different nature from that of the plastic film.

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 exemple de réalisation d'un sac d'emballage selon l'état antérieur de la technique montrant la surépaisseur formée au niveau du fond ;
  • la figure 2 est une vue semblable à la figure 1 montrant le même type de sac d'emballage en matière plastique présentant, selon le procédé de l'invention, un fond parfaitement plat ;
  • la figure 3 est une vue de face montrant la formation des soufflets latéraux du sac, représenté avant formation du fond ;
  • la figure 4 montre le pliage de l'une des extrémités ouvertes du sac avant fixation de la bande de fond ;
  • la figure 5 est une vue correspondant à la figure 4, après fixation de la bande de fond ;
  • la figure 6 est une vue en coupe transversale d'un sac résultant du procédé de fabrication selon l'invention.
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 an exemplary embodiment of a packaging bag according to the prior art showing the extra thickness formed at the bottom;
  • the figure 2 is a view similar to the figure 1 showing the same type of plastic packaging bag having, according to the method of the invention, a perfectly flat bottom;
  • the figure 3 is a front view showing the formation of the lateral bellows of the bag, shown before formation of the bottom;
  • the figure 4 shows the folding of one of the open ends of the bag before fixing the bottom strip;
  • the figure 5 is a view corresponding to the figure 4 after fixing the bottom band;
  • the figure 6 is a cross-sectional view of a bag resulting from the manufacturing method according to the invention.

Comme indiqué, l'invention s'applique à la réalisation de sacs d'emballage (1) obtenus à partir d'une bobine de film en matière plastique, lequel film est soumis, en continu, à différentes opérations notamment de pliage et de soudure réalisées en automatique. La matière plastique utilisée peut être, par exemple, du PE additionné d'OPP, ou bien du PE additionné de PET, ou toute matière employée dans le domaine de l'emballage, alimentaire notamment.As indicated, the invention applies to the production of packaging bags (1) obtained from a reel of plastic film, which film is subjected, continuously, to various operations including folding and welding performed automatically. The plastics material used may be, for example, PE added with OPP, or PE added with PET, or any material used in the field of packaging, including food.

Ces différentes opérations permettent de réaliser un sac (1) présentant deux parois (1a) et (1b) réunies par des soufflets latéraux (1c) et (1d). Chaque soufflet (1c) et (1d) est formé par deux plis symétriques identiques (1c1), (1c2) et (1d1), (1d2). L'opération de formation des soufflets latéraux est réalisée à partir de la bobine de film en matière plastique, c'est-à-dire sans être obligé de rapporter des éléments indépendants. Ces différentes étapes sont parfaitement connues pour un homme du métier.These various operations make it possible to produce a bag (1) having two walls (1a) and (1b) joined by side gussets (1c) and (1d). Each bellows (1c) and (1d) is formed by two identical symmetrical folds (1c1), (1c2) and (1d1), (1d2). The operation of forming the lateral bellows is carried out from the reel of plastic film, that is to say without having to report independent elements. These different steps are well known to a person skilled in the art.

Dans le process de fabrication, le film est découpé transversalement en fonction de la hauteur du sac désiré. On renvoie à la figure 3. A ce niveau, le sac présente donc deux extrémités transversales ouvertes (1e) et (If). L'une des extrémités ouvertes (1e) est conformée et agencée pour constituer la partie supérieure fermée du sac équipé ou non de moyens d'ouverture et de fermeture temporaire. L'autre extrémité ouverte (1f) est agencée pour constituer le fond du sac.In the manufacturing process, the film is cut transversely according to the height of the desired bag. We refer to the figure 3 . At this level, the bag therefore has two open transverse ends (1e) and (If). One of the open ends (1e) is shaped and arranged to form the closed upper portion of the bag with or without means for opening and closing. The other open end (1f) is arranged to form the bottom of the bag.

Selon une caractéristique à la base de l'invention, comme le montre notamment la figure 4, on rabat extérieurement l'extrémité transversale ouverte (1f) de l'une des parois (1b), de manière à ouvrir les soufflets (1c) et (1d) et les positionner à plat en formant un triangle (1c3), (1d3).According to a characteristic which is the basis of the invention, as shown in particular by figure 4 the outer transverse end (1f) of one of the walls (1b) is folded externally so as to open the bellows (1c) and (1d) and position them flat forming a triangle (1c3), (1d3 ).

Selon l'invention, on rapporte et on fixe, sur la face interne (lbl) de la paroi rabattue (1b), sur la face interne des soufflets disposés en triangle (lc3), (1d3), et sur la face interne (1a1) de la paroi (1a), une bande (2) apte à faire office de fond. Cette bande (2) a une forme générale rectangulaire dont la longueur correspond sensiblement à la largeur du sac, tandis que sa largeur correspond à la largeur des soufflets (1c) et (1d).According to the invention, the inner face (lbl) of the folded wall (1b) is attached and fixed on the internal face of the bellows arranged in a triangle (1c3), (1d3), and on the internal face (1a1). ) of the wall (1a), a strip (2) adapted to act as a bottom. This band (2) has a generally rectangular shape whose length substantially corresponds to the width of the bag, while its width corresponds to the width of the bellows (1c) and (1d).

On rappelle par ailleurs que les plis externes des soufflets (1c) et (1d) sont assemblés par une ligne de soudure (3). Selon l'invention, et comme le montre la figure 3, les lignes de soudure (3) sont réalisées sur une partie seulement de la hauteur du sac à une certaine distance (d) de l'extrémité transversale (1f) destinée à être rabattue. Cette distance (d) correspond à la largeur d'un pli des soufflets (1c) et (1d). Cette solution est avantageuse étant donné qu'elle permet de fixer la bande de fond (2) sur la totalité de la largeur du sac en supprimant tout rebord périphérique.It is also recalled that the external folds of the bellows (1c) and (1d) are assembled by a weld line (3). According to the invention, and as shown by figure 3 , the weld lines (3) are formed on only a portion of the height of the bag at a distance (d) from the transverse end (1f) to be folded. This distance (d) corresponds to the width of a fold of the bellows (1c) and (1d). This solution is advantageous since it makes it possible to fix the bottom strip (2) over the entire width of the bag by eliminating any peripheral rim.

Compte tenu des caractéristiques à la base de l'invention, il en résulte qu'après écartement des soufflets, le sac présente un fond (2) parfaitement plat (figure 2), en opposition au même type de sac obtenu selon l'état de la technique (figure 1) où l'on voit que le fond est réalisé par soudure des parois pour être rabattu et fixé sur l'une desdites parois en constituant une surépaisseur.Given the basic characteristics of the invention, it follows that after separation of the bellows, the bag has a bottom (2) perfectly flat ( figure 2 ), in opposition to the same type of bag obtained according to the state of the art ( figure 1 ) where it is seen that the bottom is made by welding the walls to be folded down and fixed on one of said walls constituting an extra thickness.

Selon l'invention, la suppression de cette surépaisseur permet d'obtenir un sac avec un fond parfaitement plat lui conférant une grande stabilité en permettant, par conséquent, de le remplir de produits présentant un très faible poids. C'est ainsi que ce sac peut trouver une application avantageuse pour le conditionnement de céréales. On note également que ce fond plat assure une stabilité verticale du sac, y compris avant remplissage.According to the invention, the removal of this extra thickness makes it possible to obtain a bag with a perfectly flat bottom giving it great stability, thus making it possible to fill it with products having a very low weight. This is how this bag can find an advantageous application for the packaging of cereals. It is also noted that this flat bottom provides vertical stability of the bag, including before filling.

Selon une autre caractéristique, après fixation de la bande de fond (2), on réalise, dans la partie médiane de ladite bande, sur la totalité de sa longueur, une ligne de pliage (2a) parallèle audit fond permettant ainsi de conditionner à plat le sac avant utilisation.According to another characteristic, after attachment of the bottom strip (2), a fold line (2a) parallel to said bottom is made in the middle portion of said strip, over its entire length, thus making it possible to package flat. the bag before use.

En outre, d'une manière connue, afin de faciliter la formation du sac au moment de l'écartement des soufflets, on peut réaliser sur l'une au moins des parois, une ligne de marquage parallèle au fond. Cette ligne de marquage est située à une distance du fond (2) correspondant sensiblement à la largeur d'un pli des soufflets.In addition, in a known manner, to facilitate the formation of the bag at the time of separation of the bellows, can be made on at least one of the walls, a marking line parallel to the bottom. This marking line is located at a distance from the bottom (2) substantially corresponding to the width of a fold of the bellows.

A noter que la bande de fond (2) peut être réalisée dans le même matériau que le film plastique constitutif du sac, ou dans un matériau de nature différente.Note that the bottom strip (2) may be made of the same material as the plastic film constituting the bag, or in a different kind of material.

Les avantages ressortent bien de la description, en particulier on souligne et on rappelle la réalisation d'un fond parfaitement plat, sans aucune surépaisseur dans le cas de la fabrication en continu d'un sac en matière plastique présentant directement des soufflets latéraux lors de sa fabrication.The advantages are apparent from the description, in particular it emphasizes and reminds the realization of a perfectly flat bottom, without any extra thickness in the case of the continuous manufacture of a plastic bag having directly side bellows at its manufacturing.

Claims (6)

  1. Method of manufacturing a bag from a reel of plastic film according to which:
    - the film is subjected to successive folding operations, in order to make lateral gussets (1c) and (1d) between two walls (1a) and (1b);
    - the film is cut crosswise as a function of the required height of the bag;
    - the transverse open end (1f) of one of the walls (1b) is folded back externally, so as to open the gussets and place them flat forming a triangle (1c3) and (1d3);
    - to the internal face of the folded back wall part (1f), to the internal face of the gussets arranged in a triangle (1c3) and (1d3) and to the internal face of the other wall (1a), is added and secured a strip (2) capable of acting as a bottom;
    characterised in that:
    - the external folds of the gussets (1c) and (1d) are assembled on a part of the height of the bag up to a certain distance (d) from the transverse end for folding back, said distance corresponding to the width of a fold of the gussets.
  2. Method as claimed in claim 1, characterised in that after securing the bottom strip (2), a fold line parallel to said bottom is implemented in the median part of the strip, over the entire length thereof.
  3. Method as claimed in claim 1, characterised in that, on at least one of the walls (1a) and/or (1b) a marking line is implemented parallel to the bottom (2) and at a distance from said bottom corresponding substantially to the width of a fold of the gussets.
  4. Method as claimed in any one of the claims 1 and 3, characterised in that the structures are implemented by flat weld lines.
  5. Method as claimed in any one of claims 1 to 4, characterised in that the bottom strip (2) is made out of the same material as the plastic film.
  6. Method as claimed in any one of claims 1 to 4, characterised in that the bottom strip (2) is made out of a material of a different type from that of the plastic film.
EP08300270A 2007-09-21 2008-09-18 Method of manufacturing a bag using a reel of film made from plastic material Active EP2039619B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0757775A FR2921298B1 (en) 2007-09-21 2007-09-21 METHOD FOR MANUFACTURING A BAG FROM A PLASTIC FILM COIL AND THE OBTAINED BAG

Publications (2)

Publication Number Publication Date
EP2039619A1 EP2039619A1 (en) 2009-03-25
EP2039619B1 true EP2039619B1 (en) 2010-07-21

Family

ID=39310017

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08300270A Active EP2039619B1 (en) 2007-09-21 2008-09-18 Method of manufacturing a bag using a reel of film made from plastic material

Country Status (5)

Country Link
EP (1) EP2039619B1 (en)
AT (1) ATE474782T1 (en)
DE (1) DE602008001848D1 (en)
ES (1) ES2348654T3 (en)
FR (1) FR2921298B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014116820A1 (en) * 2014-11-18 2016-05-19 Mondi Consumer Packaging Technologies Gmbh Side gusseted bag and method of making a gusseted bag
FR3032185B1 (en) * 2015-01-29 2019-05-17 Coveris Flexibles France PREFORM BAG OF FLEXIBLE PLASTIC MATERIAL, IN PARTICULAR PET / PE, THICKER THAN 200 MIRONS
IT201600073754A1 (en) * 2016-07-14 2018-01-14 C C M Cooperativa Cartai Modenese Soc Cooperativa Bag
FR3109370B1 (en) * 2019-05-22 2022-10-14 Coveris Flexibles France Easy-to-recycle packaging bag
FR3096360B1 (en) * 2019-05-22 2021-07-16 Coveris Flexibles France Easy-to-recycle packaging bag

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1611680A1 (en) * 1967-08-03 1971-01-14 Roti Gmbh Anilindruck U Papier Pleated bag and method of making the same
EP0217982B1 (en) * 1985-08-12 1990-11-28 Mobil Oil Corporation A thermoplastic bag, method and system for its manufacture
JP3716206B2 (en) * 2001-12-03 2005-11-16 株式会社細川洋行 Manufacturing method of free-standing bags
FR2833928B1 (en) 2001-12-26 2004-02-13 Autobar Flexible France PACKAGING BAG WITH PREFORMED FONF

Also Published As

Publication number Publication date
FR2921298B1 (en) 2010-04-09
EP2039619A1 (en) 2009-03-25
DE602008001848D1 (en) 2010-09-02
FR2921298A1 (en) 2009-03-27
ATE474782T1 (en) 2010-08-15
ES2348654T3 (en) 2010-12-10

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