EP0192589B1 - Paper bag, especially for packaging powdery or granular material - Google Patents

Paper bag, especially for packaging powdery or granular material Download PDF

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Publication number
EP0192589B1
EP0192589B1 EP19860420034 EP86420034A EP0192589B1 EP 0192589 B1 EP0192589 B1 EP 0192589B1 EP 19860420034 EP19860420034 EP 19860420034 EP 86420034 A EP86420034 A EP 86420034A EP 0192589 B1 EP0192589 B1 EP 0192589B1
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EP
European Patent Office
Prior art keywords
bag
paper
glueing
produced
gusset
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Expired
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EP19860420034
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German (de)
French (fr)
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EP0192589A1 (en
Inventor
Philippe Mougel
Michel Roche
Jean-Pierre Tavan
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Mondi Lembacel SAS
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Lembacel SA
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Publication of EP0192589A1 publication Critical patent/EP0192589A1/en
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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
    • B65D33/00—Details of, or accessories for, sacks or bags

Definitions

  • the present invention relates to a paper bag, in particular for the packaging of powdered or granulated products, such as cement, plaster, or even food products such as powdered sugar or flour.
  • the bag in question is more especially a medium capacity bag, less than or equal to 10 kg, which must be easy to handle for the user, whose gripping must advantageously be carried out using a handle, which must have a stable support on one of its bottoms for its presentation in store, which must have a good seal in order to avoid the flow of products dirtying the external surface and altering the presentation, and which must finally have an appropriate spout with the possibility of splitting the emptying of the contents of the bag.
  • medium capacity bags include a crossed bottom which may include a filling valve, and another bottom closed by sewing. This technique allows the production of a bag having a triangular vertical section. Therefore, the ratio between the quantity of packaged products and the paper surface is not very interesting, the aesthetics are average, and the triangular shape makes it difficult to palletize full bags during their transport.
  • the closure by sewing provides a poor seal to the bag, the sewing holes allowing the passage of the product which comes to stain the outer faces of the packaging, which harms the presentation thereof, and in particular the decorative pattern. .
  • the present invention aims to remedy these drawbacks.
  • the bag it relates to, of the type produced from a bellows tube, that is to say from a tubular element comprising, when it is flat, two symmetrical folds towards the inside at its two edges, and the ends of which are closed by two bottoms, one of the two bottoms is produced by bonding the tubular element over a certain length, at the interior face of this element, this bonding being carried out between the walls facing the flat bag, including at the folds of the bellows, by bonding on the two facing walls of the tubular element of a paper reinforcing sheet, folded in half, of width less than the distance between the two bellows of the bag and of height at least equal to half the width of the bag, the fold of this sheet being located on the side of the closed end of the bag, the bottom closing being finally completed by a bonding bond between each fold of a bellows and the corresponding face of the bag, along an oblique line extending from the closed end of the bag towards the middle of the latter and from the central reinforcement sheet towards
  • This packaging has the advantage of being able to be filled from its end situated on the side opposite the bottom which has just been defined.
  • the sheet of paper forms a bridge which protects the transverse weld located at the end of the bag, and which avoids any risk of delamination of the latter under the effect of the pressure of the material.
  • the bottom takes a substantially rectangular shape, and gives the filled bag a substantially parallelepiped shape.
  • this bag is advantageous in the sense that the packaging is perfectly sealed, avoiding any leakage of products which may soil the outside face of the bag and in particular the advertising inscriptions carried thereon.
  • the parallelepiped shape is very advantageous because it allows the bag to stand upright, as well as the stacking of filled bags for transport.
  • the bridge sheet can be fixed against the inner tubular wall, or between two tubular walls corresponding to two different layers of the bag.
  • At least one handle is positioned so that its free ends are located between the sheet forming the reinforcement and one of the inner walls of the tube.
  • the various closings of the bottom considered of the bag are produced by reactivation of an adhesive of the “hot melt” type deposited on the internal face of the tubular element during the production of the latter.
  • the transverse end closure is produced using ribbed jaws transverse to the direction of the bag, ensuring the formation of stiffening grooves in the assembly.
  • a precut is formed, along the transverse closure zone and on the two flaps of the bellows, the opposite faces of the two flaps of the bellows for their part coated with permanent glue.
  • the bag is made from two layers of paper, is made at the glued end, a bonding reserve between the two thicknesses of paper directly above one oblique bonding lines, a vertical precut extending to the oblique bonding line, in the paper layer on the inside.
  • the user just has to move aside the outer layers of paper to access the inner ones, cut them out according to the precut, the inner sheets continuing to tear along the gluing lines to form the spout, after peeling of the two folds of the bellows which are in this case still coated with permanent adhesive.
  • the bag shown in the drawing is a medium capacity bag, that is to say intended to contain less than 10 kg of powdered or granulated products.
  • This bag (2) comprises a tubular body (3) having two lateral bellows (4) each of which consists of two flaps (5) connected to one another by a central fold (6) and each connected to the one of the side faces (7) by a fold (8).
  • One (9) of the bottoms is a square bottom equipped with an automatic filling valve, while the other bottom (10) of shape corresponding to that of the bottom (9) is equipped with a grip handle (12 ). From a practical point of view, the inner face of the tubular element forming the bag is coated, on the bottom side (10) over a height greater than half the width of the bottom to be obtained, with an adhesive (13 ) of the “hot melt” type.
  • a paper sheet (14), of reinforcement, of width at most equal to the distance between the folds (6) of the two bellows (4) is placed inside the bag, such so that its central fold (15) is disposed on the side of the open end thereof, but set back about 2 cm from the opening.
  • the free ends (16) of the handle are also slid inside the bag, for example between the reinforcing sheet (14) and the inside wall of the latter.
  • the bag is closed by reactivating the adhesive (13) by pinching between jaws.
  • the jaws are shaped to form a bonding of ribs (17) with care on a strip (18) extending over the entire width of the bag, at the free end thereof.
  • the jaws are also shaped to reactivate the glue at the reinforcement sheet (14) to ensure the fixing of the latter on the inside of the bag.
  • the adhesive is reactivated along two oblique lines (19) each extending between a flap (5) of a bellows (4) and the corresponding side wall (7), each oblique line being inclined from the line (18) towards the middle of the bag and from the central fold (6) of the bellows considered towards the corresponding fold (8).
  • a perfectly waterproof bag is thus obtained, which can be filled by its bottom (9) and which takes, during filling, a parallelepiped shape, this without risk of deterioration of the bonding (18), which is perfectly protected by the reinforcement sheet (14).
  • the two flaps (5) of a bellows (4) have a pre-cut line (20) disposed below the adhesive strip (18).
  • the walls opposite the flaps (5) are coated, in the zone corresponding to the glued strip (18), with dots of permanent glue (22).
  • the user need only tear the precut (20) and take off the flaps (5) to provide a pouring spout (23). If the contents of the bag are not emptied during a single operation, the spout (23) can be retracted inward and the two upper edges of the bellows, coated with permanent adhesive, reapplied one against the other.
  • Figures 8 and 9 show an alternative embodiment of the spout in the case of a bag consisting of two layers of paper.
  • the invention brings a great improvement to the existing technique by providing a bag whose tight closure, and obtained simply, allows the production of an extremely resistant parallelepiped bag.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)

Description

La présente invention a pour objet un sac en papier, notamment pour le conditionnement de produits pulvérulents ou granulés, tels que ciment, plâtre, ou encore produits alimentaires tels que sucre en poudre ou farine.The present invention relates to a paper bag, in particular for the packaging of powdered or granulated products, such as cement, plaster, or even food products such as powdered sugar or flour.

Le sac dont il s'agit est plus spécialement un sac de moyenne contenance, inférieure ou égale à 10 kg, qui doit être d'une manipulation aisée pour l'utilisateur, dont la préhension doit avantageusement être réalisée à l'aide d'une poignée, qui doit disposer d'un appui stable sur l'un de ses fonds en vue de sa présentation en magasin, qui doit posséder une bonne étanchéité afin d'éviter les écoulements de produits salissant la surface extérieure et altérant la présentation, et qui doit enfin posséder un bec verseur approprié avec possibilité de fractionnement du vidage du contenu du sac.The bag in question is more especially a medium capacity bag, less than or equal to 10 kg, which must be easy to handle for the user, whose gripping must advantageously be carried out using a handle, which must have a stable support on one of its bottoms for its presentation in store, which must have a good seal in order to avoid the flow of products dirtying the external surface and altering the presentation, and which must finally have an appropriate spout with the possibility of splitting the emptying of the contents of the bag.

En outre, il est souhaitable qu'un tel sac permette un ensachage rapide des produits et qu'il soit susceptible d'être palettisé lors de son expédition.In addition, it is desirable that such a bag allows rapid bagging of the products and that it is capable of being palletized during its dispatch.

Les sacs de grande contenance, tels que les sacs de ciment de 50 kg, possèdent deux fonds croisés. Cette solution ne permet pas la tenue en position debout du sac sur l'un de ses fonds, ne permet pas le montage d'une poignée de préhension et ne permet pas le vidage fractionné du sac avec fermeture entre deux opérations de prélèvement.Large capacity bags, such as 50 kg cement bags, have two crossed bottoms. This solution does not allow the bag to be held in a standing position on one of its bottoms, does not allow the mounting of a grip handle and does not allow fractional emptying of the bag with closure between two sampling operations.

Généralement, les sacs de moyenne contenance comprennent un fond croisé pouvant comporter une valve de remplissage, et un autre fond fermé par couture. Cette technique permet la réalisation d'un sac possédant une section verticale triangulaire. De ce fait, le rapport entre la quantité de produits conditionnés et la surface de papier est peu intéressant, l'esthétique est moyenne, et la forme triangulaire rend difficile la palettisation des sacs pleins lors de leur transport.Generally, medium capacity bags include a crossed bottom which may include a filling valve, and another bottom closed by sewing. This technique allows the production of a bag having a triangular vertical section. Therefore, the ratio between the quantity of packaged products and the paper surface is not very interesting, the aesthetics are average, and the triangular shape makes it difficult to palletize full bags during their transport.

En outre, la fermeture par couture procure une mauvaise étanchéité au sac, les trous de couture permettant le passage du produit qui vient souiller les faces extérieures de l'emballage, ce qui nuit à la présentation de celui-ci, et notamment du motif décoratif.In addition, the closure by sewing provides a poor seal to the bag, the sewing holes allowing the passage of the product which comes to stain the outer faces of the packaging, which harms the presentation thereof, and in particular the decorative pattern. .

Pour réaliser le vidage du sac, il est procédé à l'ouverture d'une partie de la couture, ce qui est une solution assez médiocre.To empty the bag, part of the seam is opened, which is a fairly poor solution.

La présente invention vise à remédier à ces inconvénients.The present invention aims to remedy these drawbacks.

A cet effet, dans le sac qu'elle concerne, du type réalisé à partir d'un tube à soufflets, c'est-à-dire d'un élément tubulaire comprenant, lorsqu'il est à plat, deux replis symétriques vers l'intérieur au niveau de ses deux bords, et dont les extrémités sont obturées par deux fonds, l'un des deux fonds est réalisé par un collage sur une certaine longueur de l'élément tubulaire, au niveau de la face intérieure de cet élément, ce collage étant réalisé entre les parois en regard du sac à plat, y compris au niveau des plis des soufflets, par un collage sur les deux parois en regard de l'élément tubulaire d'une feuille de renfort en papier, pliée en deux, de largeur inférieure à la distance entre les deux soufflets du sac et de hauteur au moins égale à la moitié de la largeur du sac, le pli de cette feuille étant situé du côté de l'extrémité fermée du sac, la fermeture du fond étant enfin complétée par une liaison par collage entre chaque pli d'un soufflet et la face correspondante du sac, selon une ligne oblique s'étendant depuis l'extrémité fermée du sac vers le milieu de celui-ci et depuis la feuille centrale de renfort vers le bord extérieur correspondant du sac.To this end, in the bag it relates to, of the type produced from a bellows tube, that is to say from a tubular element comprising, when it is flat, two symmetrical folds towards the inside at its two edges, and the ends of which are closed by two bottoms, one of the two bottoms is produced by bonding the tubular element over a certain length, at the interior face of this element, this bonding being carried out between the walls facing the flat bag, including at the folds of the bellows, by bonding on the two facing walls of the tubular element of a paper reinforcing sheet, folded in half, of width less than the distance between the two bellows of the bag and of height at least equal to half the width of the bag, the fold of this sheet being located on the side of the closed end of the bag, the bottom closing being finally completed by a bonding bond between each fold of a bellows and the corresponding face of the bag, along an oblique line extending from the closed end of the bag towards the middle of the latter and from the central reinforcement sheet towards the corresponding outer edge of the bag.

Cet emballage présente l'intérêt de pouvoir être rempli à partir de son extrémité située du côté opposé au fond qui vient d'être défini. Lors du remplissage, la feuille de papier forme un pont qui vient protéger la soudure transversale située à l'extrémité du sac, et qui évite tout risque de délamination de celle-ci sous l'effet de la pression de la matière.This packaging has the advantage of being able to be filled from its end situated on the side opposite the bottom which has just been defined. During filling, the sheet of paper forms a bridge which protects the transverse weld located at the end of the bag, and which avoids any risk of delamination of the latter under the effect of the pressure of the material.

En outre, lors du remplissage, et notamment compte tenu de la présence des lignes de collage obliques, le fond prend une forme sensiblement rectangulaire, et confère au sac rempli une forme sensiblement parallèlépipèdique.In addition, during filling, and in particular taking into account the presence of oblique bonding lines, the bottom takes a substantially rectangular shape, and gives the filled bag a substantially parallelepiped shape.

La structure de ce sac est intéressante en ce sens que l'emballage est parfaitement étanche, évitant toute fuite de produits pouvant salir la face extérieure du sac et notamment les inscriptions publicitaires portées sur celle-ci.The structure of this bag is advantageous in the sense that the packaging is perfectly sealed, avoiding any leakage of products which may soil the outside face of the bag and in particular the advertising inscriptions carried thereon.

En outre, la forme parallèlépipèdique est très avantageuse car permettant une bonne tenue du sac debout, ainsi que le gerbage des sacs remplis pour leur transport.In addition, the parallelepiped shape is very advantageous because it allows the bag to stand upright, as well as the stacking of filled bags for transport.

Dans la mesure où le sac est réalisé à partir de plusieurs feuilles de papier superposées, la feuille formant pont peut être fixée contre la paroi tubulaire intérieure, ou entre deux parois tubulaires correspondant à deux couches différentes du sac.Insofar as the bag is produced from several superposed sheets of paper, the bridge sheet can be fixed against the inner tubular wall, or between two tubular walls corresponding to two different layers of the bag.

Avantageusement, avant fermeture du sac, au moins une poignée est positionnée de telle sorte que ses extrémités libres soient situées entre la feuille formant renfort et l'une des parois intérieures du tube.Advantageously, before closing the bag, at least one handle is positioned so that its free ends are located between the sheet forming the reinforcement and one of the inner walls of the tube.

Selon une autre caractéristique, les différentes fermetures du fond considéré du sac sont réalisées par réactivation d'une colle de type « hot melt déposée sur la face intérieure de l'élément tubulaire lors de la réalisation de celui-ci.According to another characteristic, the various closings of the bottom considered of the bag are produced by reactivation of an adhesive of the “hot melt” type deposited on the internal face of the tubular element during the production of the latter.

Avantageusement, la fermeture transversale d'extrémité est réalisée à l'aide de mors nervurés transversalement à la direction du sac, assurant la formation de cannelures de rigidification de l'assemblage.Advantageously, the transverse end closure is produced using ribbed jaws transverse to the direction of the bag, ensuring the formation of stiffening grooves in the assembly.

Selon une autre caractéristique de l'invention, sur au moins l'un des deux soufflets, est ménagée une prédécoupe, le long de la zone de fermeture transversale et sur les deux volets du soufflet, les faces en regard des deux volets du soufflet étant pour leur part revêtues de colle permanente.According to another characteristic of the invention, on at least one of the two bellows, a precut is formed, along the transverse closure zone and on the two flaps of the bellows, the opposite faces of the two flaps of the bellows for their part coated with permanent glue.

Pour verser une certaine quantité du produit contenu dans le sac, il suffit à l'utilisateur d'exercer une pression le long de la ligne prédécoupée, pour déchirer celle-ci, de décoller l'un de l'autre les deux volets du soufflet et de tirer les deux volets vers l'extérieur en dessous de la prédécoupe pour former un bec verseur.To pour a certain quantity of the product contained in the bag, it suffices for the user to exert pressure along the pre-cut line, to tear it, to peel off the two flaps of the bellows and pull the two flaps outwards below the pre-cut to form a spout.

Si la totalité du contenu du sac n'est pas utilisée en une fois, il suffit de replier le bec vers l'intérieur et de remettre en contact les deux plis du soufflet au niveau des zones revêtues de colle _ permanente pour assurer une bonne fermeture du sac.If the entire contents of the bag are not used at once, simply fold the spout inward and bring the two folds of the bellows back into contact at the areas coated with permanent glue to ensure proper closure from the bag.

Selon une autre possibilité, et dans la mesure où le sac est réalisé à partir de deux couches de papier, est réalisée au niveau de l'extrémité collée, une réserve de collage entre les deux épaisseurs de papier à l'aplomb de l'une des lignes de collage obliques, une prédécoupe verticale s'étendant jusqu'à la ligne de collage oblique, dans la couche de papier située du côté intérieur.According to another possibility, and insofar as the bag is made from two layers of paper, is made at the glued end, a bonding reserve between the two thicknesses of paper directly above one oblique bonding lines, a vertical precut extending to the oblique bonding line, in the paper layer on the inside.

Il suffit à l'utilisateur d'écarter les couches de papier extérieures pour accéder à celles intérieures, de découper celles-ci selon la prédécoupe, les feuilles intérieures continuant de se déchirer le long des lignes de collage pour former le bec verseur, après décollement des deux plis du soufflet qui sont dans ce cas encore revêtus de colle permanente.The user just has to move aside the outer layers of paper to access the inner ones, cut them out according to the precut, the inner sheets continuing to tear along the gluing lines to form the spout, after peeling of the two folds of the bellows which are in this case still coated with permanent adhesive.

De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, deux formes d'exécution de ce sac :

  • Figure 1 est une vue en perspective de ce sac en conditions d'utilisation ;
  • Figure 2 en est une vue en coupe, à échelle agrandie, selon la ligne II-II de figure 1 ;
  • Figure 3 est une vue en perspective de l'une de ses extrémités en position ouverte ;
  • Figure 4 est une vue en perspective de l'une des extrémités après fermeture, le sac étant à plat ;
  • Figure 5 est une vue schématique représentant les zones de collage ;
  • Figure 6 est une vue en perspective d'un angle de l'emballage fermé ;
  • Figure 7 est une vue en perspective du même angle après réalisation d'un bec verseur ;
  • Figures 8 et 9 sont deux vues en perspective d'une variante d'un angle de cet emballage, respectivement avant et après ouverture du bec verseur.
In any case, the invention will be clearly understood with the aid of the description which follows, with reference to the appended schematic drawing representing, by way of nonlimiting examples, two embodiments of this bag:
  • Figure 1 is a perspective view of this bag in conditions of use;
  • Figure 2 is a sectional view, on an enlarged scale, along the line II-II of Figure 1;
  • Figure 3 is a perspective view of one of its ends in the open position;
  • Figure 4 is a perspective view of one of the ends after closure, the bag being flat;
  • Figure 5 is a schematic view showing the bonding areas;
  • Figure 6 is a perspective view of a corner of the closed package;
  • Figure 7 is a perspective view of the same angle after completion of a spout;
  • Figures 8 and 9 are two perspective views of a variant of an angle of this packaging, respectively before and after opening the pouring spout.

Le sac représenté au dessin est un sac de moyenne contenance, c'est-à-dire destiné à contenir moins de 10 kg de produits pulvérulents ou granulés.The bag shown in the drawing is a medium capacity bag, that is to say intended to contain less than 10 kg of powdered or granulated products.

Ce sac (2) comprend un corps tubulaire (3) présentant deux soufflets latéraux (4) dont chacun est constitué par deux volets (5) reliés l'un à l'autre par un pli central (6) et reliés chacun à l'une des faces latérales (7) par un pli (8). L'un (9) des fonds est un fond carré équipé d'une valve automatique de remplissage, tandis que l'autre fond (10) de forme correspondant à celle du fond (9) est équipé d'une poignée de préhension (12). D'un point de vue pratique, la face intérieure de l'élément tubulaire formant le sac est enduite, du côté du fond (10) sur une hauteur supérieure à la moitié de la largeur du fond à obtenir, d'une colle (13) de type « hot melt ».This bag (2) comprises a tubular body (3) having two lateral bellows (4) each of which consists of two flaps (5) connected to one another by a central fold (6) and each connected to the one of the side faces (7) by a fold (8). One (9) of the bottoms is a square bottom equipped with an automatic filling valve, while the other bottom (10) of shape corresponding to that of the bottom (9) is equipped with a grip handle (12 ). From a practical point of view, the inner face of the tubular element forming the bag is coated, on the bottom side (10) over a height greater than half the width of the bottom to be obtained, with an adhesive (13 ) of the “hot melt” type.

En pratique, avant formation du fond, une feuille en papier (14), de renfort, de largeur au plus égale à la distance entre les plis (6) des deux soufflets (4) est disposée à l'intérieur du sac, de telle sorte que son pli central (15) soit disposé du côté de l'extrémité ouverte de celui-ci, mais en retrait d'environ 2 cm de l'ouverture.In practice, before the bottom is formed, a paper sheet (14), of reinforcement, of width at most equal to the distance between the folds (6) of the two bellows (4) is placed inside the bag, such so that its central fold (15) is disposed on the side of the open end thereof, but set back about 2 cm from the opening.

Les extrémités libres (16) de la poignée sont également glissées à l'intérieur du sac, par exemple entre la feuille de renfort (14) et la paroi intérieure de celui-ci. La fermeture du sac est réalisée par réactivation de la colle (13) par pincement entre des mors.The free ends (16) of the handle are also slid inside the bag, for example between the reinforcing sheet (14) and the inside wall of the latter. The bag is closed by reactivating the adhesive (13) by pinching between jaws.

Les mors sont conformés pour réaliser un collage avec ménagement de nervures (17) sur une bande (18) s'étendant sur toute la largeur du sac, à l'extrémité libre de celui-ci. Les mors sont également conformés pour réaliser la réactivation de la colle au niveau de la feuille de renfort (14) pour assurer la fixation de celle-ci sur la face intérieure du sac. Enfin, la colle est réactivée selon deux lignes obliques (19) s'étendant chacune entre un volet (5) d'un soufflet (4) et la paroi latérale (7) correspondante, chaque ligne oblique étant inclinée depuis la ligne (18) vers le milieu du sac et depuis le pli central (6) du soufflet considéré vers le pli (8) correspondant.The jaws are shaped to form a bonding of ribs (17) with care on a strip (18) extending over the entire width of the bag, at the free end thereof. The jaws are also shaped to reactivate the glue at the reinforcement sheet (14) to ensure the fixing of the latter on the inside of the bag. Finally, the adhesive is reactivated along two oblique lines (19) each extending between a flap (5) of a bellows (4) and the corresponding side wall (7), each oblique line being inclined from the line (18) towards the middle of the bag and from the central fold (6) of the bellows considered towards the corresponding fold (8).

Il est ainsi obtenu un sac parfaitement étanche, qui peut être rempli par son fond (9) et qui prend, au remplissage, une forme parallèlépipèdique, ceci sans risque de détérioration du collage (18), qui est parfaitement protégé par la feuille de renfort (14).A perfectly waterproof bag is thus obtained, which can be filled by its bottom (9) and which takes, during filling, a parallelepiped shape, this without risk of deterioration of the bonding (18), which is perfectly protected by the reinforcement sheet (14).

Dans la forme d'exécution représentée aux figures 1 à 7, les deux volets (5) d'un soufflet (4) comportent une ligne de prédécoupe (20) disposée en dessous de la bande de collage (18).In the embodiment shown in Figures 1 to 7, the two flaps (5) of a bellows (4) have a pre-cut line (20) disposed below the adhesive strip (18).

En outre, les parois en regard des volets (5) sont revêtues, dans la zone correspondant à la bande collée (18), de points de colle permanente (22).In addition, the walls opposite the flaps (5) are coated, in the zone corresponding to the glued strip (18), with dots of permanent glue (22).

En pratique, il suffit à l'utilisateur de déchirer la prédécoupe (20) et de décoller les volets (5) pour ménager un bec verseur (23). Si le contenu du sac n'est pas vidé au cours d'une seule opération, le bec (23) peut être rentré vers l'intérieur et les deux bords supérieurs du soufflet, revêtus de colle permanente, réappliqués l'un contre l'autre.In practice, the user need only tear the precut (20) and take off the flaps (5) to provide a pouring spout (23). If the contents of the bag are not emptied during a single operation, the spout (23) can be retracted inward and the two upper edges of the bellows, coated with permanent adhesive, reapplied one against the other.

Les figures 8 et 9 représentent une variante de réalisation du bec verseur dans le cas d'un sac constitué par deux couches de papier.Figures 8 and 9 show an alternative embodiment of the spout in the case of a bag consisting of two layers of paper.

Dans une zone (24) située à l'aplomb de l'une des lignes obliques (19), les deux couches de papier ne sont pas collées l'une sur l'autre, et la couche centrale comporte une prédécoupe (25) s'étendant jusqu'à la ligne oblique (19). Pour ouvrir le sac, il suffit de réaliser une découpe à l'emplacement de la prédécoupe, la poursuite de la traction se traduisant par une déchirure (26) de la couche de papier intérieure qui permet la formation d'un bec verseur (27).In a zone (24) located at the base of one of the oblique lines (19), the two layers of paper are not glued to each other, and the central layer has a precut (25) s 'extending to the oblique line (19). To open the bag, it suffices to make a cut at the location of the precut, the continued pulling resulting in a tear (26) of the inner layer of paper which allows the formation of a spout (27).

Comme il ressort de ce qui précède, l'invention apporte une grande amélioration à la technique existante en fournissant un sac dont la fermeture étanche, et obtenue simplement, permet la réalisation d'un sac parallèlépipèdique extrêmement résistant.As is apparent from the above, the invention brings a great improvement to the existing technique by providing a bag whose tight closure, and obtained simply, allows the production of an extremely resistant parallelepiped bag.

Comme il va de soi, l'invention ne se limite pas aux seules formes d'exécution de ce sac, décrites ci-dessus à titre d'exemples ; elle en embrasse, au contraire, toutes les variantes de réalisation.It goes without saying that the invention is not limited to the sole embodiments of this bag, described above by way of examples; on the contrary, it embraces all of its variant embodiments.

Claims (6)

1. A paper bag of the type produced from a tube with gussets, that is to say a tubular unit (3) that when it is flat comprises two symmetrical folds (4) towards the interior in the proximity of its two edges, and the extremities of which are sealed off by two ends, characterized in that one of the two ends is produced by a glued joint (18) along a certain length of the internal face of the tubular unit, this adhesion being effected between opposite walls of the flat bag, including the gusset fold areas, and by glueing to the two opposite walls of the tubular unit a reinforcing sheet of paper (14) folded into two, of width less than the distance between the two gussets of the bag and of length at least equal to half the width of the bag, the fold (15) of this sheet being situated facing the closed end of the bag, closing the end being then finally completed by a glued joint between each fold of a gusset and the corresponding face of the bag, along an oblique line (19) extending from the closed extremity of the bag towards its centre and from the central reinforcing sheet towards the corresponding external edge of the bag.
2. A bag according to Claim 1, characterized in that at least one handle (12) is positioned in such a way that its free ends (16) are situated between one of the internal walls of the tube and the sheet (14) forming the reinforcement.
3. A bag according to one of Claims 1 and 2, characterized in that the different seals (18, 19) of the bag end in question are obtained by reactivation of a « hot melt type adhesive deposited on the internal surface of the tubular unit during its manufacture.
4. A bag according to Claim 3, characterized in that the transverse sealing of the extremity (18) is obtained by means of joints ribbed transversely to the direction of the bag, ensuring the formation of striations stiffening the assembly.
5. A bag according to any of Claims 1 to 4, characterized in that a pre-cut (20) is produced on at least one of the two gussets (4) along the zone of transverse sealing (18) and on the two wings (5) of the gusset, the opposite faces of the two wings of the gusset being themselves coated with permanent adhesive.
6. A bag according to any of Claims 1 to 4, characterized in that should the bag be produced from two layers of paper glueing (24) is omitted between the two thicknesses of paper at the glued extremity vertically to the end of one of the oblique glueing lines (19), a vertical pre-cut (25) in the inner layer of paper extending as far as the oblique glueing line.
EP19860420034 1985-02-05 1986-02-04 Paper bag, especially for packaging powdery or granular material Expired EP0192589B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8501994A FR2576878B1 (en) 1985-02-05 1985-02-05 PAPER BAG, ESPECIALLY FOR THE PACKAGING OF POWDER PRODUCTS OR GRANULES
FR8501994 1985-02-05

Publications (2)

Publication Number Publication Date
EP0192589A1 EP0192589A1 (en) 1986-08-27
EP0192589B1 true EP0192589B1 (en) 1987-09-09

Family

ID=9316196

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860420034 Expired EP0192589B1 (en) 1985-02-05 1986-02-04 Paper bag, especially for packaging powdery or granular material

Country Status (4)

Country Link
EP (1) EP0192589B1 (en)
DE (1) DE3660002D1 (en)
ES (1) ES292005Y (en)
FR (1) FR2576878B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012006581U1 (en) 2012-07-07 2013-09-17 Bischof + Klein Gmbh & Co. Kg Bags of flexible material, in particular of paper or paper composite material

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2197490A (en) * 1936-04-16 1940-04-16 Benjamin C Betner Company Sealed bag and method of producing it
FR1050640A (en) * 1952-02-08 1954-01-08 Further training in the manufacture of packaging bags
US3484037A (en) * 1968-04-19 1969-12-16 Emanuel Kugler Bag with unfolding insert
GB1237350A (en) * 1968-06-14 1971-06-30 Heinz Focke Bag of plastics sheeting, for containing tobacco or the like
US3663239A (en) * 1969-04-07 1972-05-16 Nabisco Inc Toaster packages having four spouts
DE1923783A1 (en) * 1969-05-09 1970-11-19 Labek Dr Alfred Carrying bag with flap
FR2093218A5 (en) * 1970-06-05 1972-01-28 Flexico France Sarl
FR2543110B1 (en) * 1983-03-21 1986-06-06 Vygon PACKAGING PACKAGING OF STERILE PRODUCTS

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202012006581U1 (en) 2012-07-07 2013-09-17 Bischof + Klein Gmbh & Co. Kg Bags of flexible material, in particular of paper or paper composite material

Also Published As

Publication number Publication date
EP0192589A1 (en) 1986-08-27
FR2576878A1 (en) 1986-08-08
ES292005Y (en) 1987-01-16
FR2576878B1 (en) 1987-04-17
ES292005U (en) 1986-05-16
DE3660002D1 (en) 1987-10-15

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