EP1332967A1 - Double-ply paper bag, method for production and use of said bag - Google Patents

Double-ply paper bag, method for production and use of said bag Download PDF

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Publication number
EP1332967A1
EP1332967A1 EP03370005A EP03370005A EP1332967A1 EP 1332967 A1 EP1332967 A1 EP 1332967A1 EP 03370005 A EP03370005 A EP 03370005A EP 03370005 A EP03370005 A EP 03370005A EP 1332967 A1 EP1332967 A1 EP 1332967A1
Authority
EP
European Patent Office
Prior art keywords
bag
strip
webs
fold
welding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03370005A
Other languages
German (de)
French (fr)
Other versions
EP1332967B1 (en
Inventor
Corinne Petit
Pierre Deleporte
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.)
Roland Emballages Sas
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Roland Emballages Sas
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Filing date
Publication date
Application filed by Roland Emballages Sas filed Critical Roland Emballages Sas
Publication of EP1332967A1 publication Critical patent/EP1332967A1/en
Application granted granted Critical
Publication of EP1332967B1 publication Critical patent/EP1332967B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/18—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements
    • B65B61/188—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for making package-opening or unpacking elements by applying or incorporating profile-strips, e.g. for reclosable bags
    • 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
    • B65D31/04—Bags or like containers made of paper and having structural provision for thickness of contents with multiple walls
    • 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
    • B65D33/16—End- or aperture-closing arrangements or devices
    • B65D33/25—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners
    • B65D33/2508—Riveting; Dovetailing; Screwing; using press buttons or slide fasteners using slide fasteners with interlocking members having a substantially uniform section throughout the length of the fastener; Sliders therefor
    • 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
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • 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
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813—Applying closures
    • B31B70/8131—Making bags having interengaging closure elements
    • B31B70/8132—Applying the closure elements in the machine direction
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/55—Tamper-indicating means based on a change or a contrast in colour

Definitions

  • the invention relates to the technical field of paper packaging for products containing fatty substances, these products being in granules or in powder and being sensitive to the environment (light and atmosphere), such as especially food for domestic animals or farm animals, dry food or phytosanitary products in grain or powder.
  • the invention relates more particularly to bellows packaging and rectangular bottom of small and medium capacity type, corresponding to a weight of the order of five hundred grams to fifteen kilograms approximately.
  • a third drawback is linked to the use of two layers of paper. strong for the realization of the packaging body. Under the effect of fatty substances contained in food, the internal sheet of strong paper may get smears and, in the long run, the outer leaf also smears. The packaging will then present a less favorable aspect to the sale. Furthermore, under the effect claws of cats or dogs, the packaging can be punctured or split, with the drawbacks mentioned earlier.
  • WO-A-97/46461 describes a packaging for food, in particular for pet food, consisting of a bag paper with bellows and handles, this packaging being provided with loop bands and hook band as marketed under the Velcro ® brand.
  • a first strip is placed on the inside of a first long side of the bag, at the near the upper free edge of this first long side.
  • the second strip is placed on the external face of a second large side of the bag, this second large side being provided on its upper free edge with a notch placed in look of the first hanging strip.
  • a fold line allows the flap from the mouth of the bag the two hanging bands then coming opposite across said notch.
  • Document FR-A-2 791 040 describes a bellows bag for the packaging of bulk products such as animal feed.
  • the bag can be stored flat, filled and closed without requiring any modification of the corresponding workstation.
  • the bag is made using a sheath made of synthetic material such as polyethylene.
  • the bag is devoid of means allowing it to be closed, a drain opening being formed by a pre-cut line placed in a corner of the bottom of bag, opposite the bag handle.
  • the invention relates, according to a first aspect, to a bag made of single or, advantageously, double-folded paper, provided in the vicinity of its opening, of a strip supporting closing means, this strip forming two sails substantially opposite one another, only one of the two sails being fixed on the inside of the inside fold of the bag before filling and its closure.
  • the invention relates, according to a second aspect, to a bag such as presented above, this bag being closed and filled, the second veil of the strip supporting the closure means being fixed on the internal face of the fold inside the bag.
  • the invention relates, according to a fourth aspect, to the use of a bag as previously presented for the packaging of food products for animals.
  • a bag such as presented above can be used for other purposes such as for example the packaging of animal bedding or food products phytosanitary in grains or powder, dry or not very humid.
  • the bag 1 is of the double fold type.
  • the bag 1 includes two unassembled sheets of paper over their entire surface area contact but fixed to each other on their edges, especially their top edges and low.
  • the two sheets are fixed one to the other by an adhesive.
  • the outside sheet or fold is printable, the inside sheet or fold forming a barrier to fat.
  • the interior fold is paper-based brown kraft to which polyethylene is applied, in particular by extrusion.
  • the bag is provided on the periphery of its mouth of two sails 2,3, whose external faces 2a, 3a are able to be attached to the inside of the inside fold of the bag.
  • the sails 2,3 are made of basic polymer material polyolefin, suitable for being welded to the extruded polyethylene of the inner fold of the bag.
  • the sails can be welded by heating, by ultrasound or high frequencies.
  • the bag is provided with reversible zip-type closing means.
  • the male 4 and female 5 sections of this type of closure are shown diagrammatically on the Figure 1, it being understood that a large number of profiles exist per se on the market and can be used here.
  • the shapes of the sections 4.5 in FIG. 1 do not must therefore be seen only as schematic.
  • a cursor 6 allows the opening and closing of the zip, by separation male and female sections 4.5.
  • the bag includes first witness means opening such as, in particular, frangible bridge connecting the cursor and one of the profiles 4,5, this frangible bridge being broken during the first opening manual zip.
  • first witness means opening such as, in particular, frangible bridge connecting the cursor and one of the profiles 4,5, this frangible bridge being broken during the first opening manual zip.
  • the two internal faces 2b, 3b can, if necessary, be welded together so as to form a peelable assembly, for example by application to these two internal sides of a repositionable adhesive, a message pre-printed on the sails being unmasked as a result of the peeling.
  • the two internal faces 2b, 3b cannot be welded between except for a colored strip of assembly by welding, the separation of veils 2,3 unmask this colored band in plain view of the consumer.
  • One of the sails 3 is welded to the inside fold of the bag while the other veil 2 remains free.
  • the bags can be delivered flat and filled in the factory according to the technique conventional: unstacking of the bag and conveying to the filling station where clips hold the mouth of the bag open.
  • the zip closure does not interfere in no way the flow of products to be packaged in the bags.
  • the bags can be closed in a single operation: a hot welding will ensure both the attachment to the internal fold of the veil bag which remained free 2, and the peelable fixing or the possible welding of the two sails 2.3 between them.
  • Profiles 4.5 extend over substantially the entire width of the mouth of the bag 1, the sails 2,3 being hidden from view by the two folds of the bag 1.
  • the bags are unstacked and brought up to a first post, by a conveyor.
  • the bag is then opened thanks to the engagement clips in the bag.
  • the zip-cursors are unwound from a reel, the strip of zip being provided with zones 7 in which the sections 4.5 are crushed and welded together. These zones 7 are substantially equidistant from a length slightly less than the width L of a large side of the bag.
  • the zip coil is unwound step by step and cut at the right of each zone 7.
  • the cut zip provided with its cursor, is then deposited in the bag and one of the sails 2,3 is fixed on the internal face of the inside fold of the bag.
  • the fixing of the veil is carried out at a temperature of the order of 230 ° C, under a pressure of the order of 0.4N for 15mm2, the welding time being of the order of 1.5 seconds.
  • the clamps that held the bag open are removed, the bag being laid flat for stacking and palletizing.
  • the bag 1 can be provided with handles, to facilitate its gripping, especially for weights over three kilograms. These handles, in paper, rope or plastic, are maintained, by gluing, welding or stapling, in particular between the two folds of the bag, as is known per se.

Abstract

A single-ply or double-ply paper bag is provided in the vicinity of its opening with a strip supporting closure mechanism. The strip forms two webs (2, 3) facing each other. Only one of the two webs is fixed to the inside face of the inner ply of the bag prior to the bag being filled and closed. An Independent claim is also included for a method of manufacturing a bag by unreeling stepwise a reel of strips comprising closure mechanism; cutting a length from the reel that is slightly shorter than the width of the opening of the bag; and fixing a single one of the two webs of the cut-off length of strip to the inside face of the inner ply of the bag, wherein the fixing step is performed while the bag is held open by spacers, e.g. clamps.

Description

L'invention se rapporte au domaine technique des emballages en papier pour produits contenant des corps gras, ces produits étant en granulés ou en poudre et étant sensibles à l'environnement (lumière et atmosphère), tels qu'en particulier les aliments pour animaux domestiques ou animaux d'élevage, produits alimentaires ou phytosanitaires secs en grains ou en poudre.The invention relates to the technical field of paper packaging for products containing fatty substances, these products being in granules or in powder and being sensitive to the environment (light and atmosphere), such as especially food for domestic animals or farm animals, dry food or phytosanitary products in grain or powder.

L'utilisation de papier pour la réalisation de tels emballages présente certains avantages : facilité d'impression, rendant l'emballage attractif pour le consommateur, prix plus faible que les multicouches et complexes tels que ceux décrits dans les documents US-A-6 333 061, WO-A-00/77300, WO-A-01/26897.The use of paper for the production of such packaging presents certain advantages: ease of printing, making the packaging attractive for consumer, lower price than multilayers and complexes such as those described in documents US-A-6,333,061, WO-A-00/77300, WO-A-01/26897.

L'invention se rapporte plus particulièrement à des emballages à soufflets et fond rectangulaire de type petite et moyenne contenance, correspondant à un poids de l'ordre de cinq cent grammes à quinze kilogrammes environ.The invention relates more particularly to bellows packaging and rectangular bottom of small and medium capacity type, corresponding to a weight of the order of five hundred grams to fifteen kilograms approximately.

On connaít déjà, dans l'art antérieur, des emballages pour aliments secs pour animaux domestiques, notamment chiens et chats, formés par le collage de deux couches de papier fort. Le cas échéant, des anses, également en papier, sont insérées entre les deux couches de papier fort. Ces sacs, d'une contenance habituelle de deux à quatre kilogrammes, sont en général scellage à chaud ou par une couture pratiquée après remplissage du sac.We already know, in the prior art, packaging for dry food for pets, especially dogs and cats, formed by bonding of two layers of strong paper. If necessary, handles, also in paper, are inserted between the two layers of strong paper. These bags, of a usual capacity of two to four kilograms, are generally sealing hot or by sewing after filling the bag.

De tels sacs présentent de nombreux inconvénients.Such bags have many disadvantages.

Un premier inconvénient est lié au fait que le sac ne peut être refermé de manière sûre, alors que la consommation des quelques kilogrammes de nourriture peut correspondre à plusieurs semaines de ration pour le ou les animaux. De ce premier inconvénient découlent de nombreux désagréments :

  • l'animal est tenté de renverser l'emballage, et de se servir lui même, ce qui peut être dangereux pour sa santé lorsque l'aliment est hyper-calorique ou prescrit par un vétérinaire ;
  • l'emballage laisse échapper des odeurs qui ne sont pas toujours agréables à l'homme, mais peuvent être agréables à certains insectes pouvant infester le contenu du sac et mettre en danger la santé des animaux ;
  • les aliments restant dans le sac sont progressivement dégradés, pouvant être dédaignés par l'animal et jetés. Le consommateur peut se méprendre sur l'origine de cette perte d'appétence et incriminer l'aliment à tort, pour se tourner vers une autre marque.
A first drawback is linked to the fact that the bag cannot be closed securely, while the consumption of a few kilograms of food can correspond to several weeks of ration for the animal or animals. Many inconveniences arise from this first drawback:
  • the animal is tempted to reverse the packaging, and to serve himself, which can be dangerous for his health when the food is high in calories or prescribed by a veterinarian;
  • the packaging releases odors which are not always pleasant for humans, but which may be pleasant to certain insects which can infest the contents of the bag and endanger the health of animals;
  • the food remaining in the bag is gradually degraded, which can be disdained by the animal and discarded. The consumer can be mistaken about the origin of this loss of palatability and incriminate the food wrongly, to turn to another brand.

Un deuxième inconvénient est lié à la difficulté pratique dans l'ouverture du sac fermé par couture. Certains sacs sont certes pourvus d'une fermeture cousue comprenant une boucle et une chaínette réalisées en des fils de couleur différente pour pouvoir facilement les distinguer. Malgré cela, beaucoup d'utilisateurs n'ont pas la patience suffisante pour s'accommoder de cette bouche de sac cousue et déchirent l'une des faces du sac, par exemple le long de la couture ou le découpe avec des ciseaux ou au cutter. De ce deuxième inconvénient découlent de nombreux désagréments :

  • risques de blessures lors de la découpe ;
  • difficulté de réalisation d'un goulot assez grand pour permettre un bon écoulement des aliments, notamment en grains, et assez petit pour permettre l'emploi d'un moyen d'obturation approximatif tel que pince à linge par exemple.
A second drawback is linked to the practical difficulty in opening the bag closed by sewing. Certain bags are certainly provided with a sewn closure comprising a loop and a chain made of threads of different color to be able to easily distinguish them. Despite this, many users do not have the patience to get used to this sewn bag mouth and tear off one side of the bag, for example along the seam or cutting it with scissors or a cutter. . From this second drawback arise many inconveniences:
  • risk of injury during cutting;
  • difficulty in making a neck large enough to allow good flow of food, especially in grains, and small enough to allow the use of an approximate sealing means such as clothespin for example.

Un troisième inconvénient est lié à l'emploi de deux couches de papier fort pour la réalisation du corps de l'emballage. Sous l'effet des corps gras contenus dans les aliments, il est possible que la feuille interne de papier fort se macule et, à la longue, que la feuille externe se macule également. L'emballage présentera alors un aspect moins favorable à la vente. Par ailleurs, sous l'effet des griffes de chats ou de chiens, l'emballage peut être perforé ou fendu, avec les inconvénients dont il a été fait mention auparavant.A third drawback is linked to the use of two layers of paper. strong for the realization of the packaging body. Under the effect of fatty substances contained in food, the internal sheet of strong paper may get smears and, in the long run, the outer leaf also smears. The packaging will then present a less favorable aspect to the sale. Furthermore, under the effect claws of cats or dogs, the packaging can be punctured or split, with the drawbacks mentioned earlier.

Aucune solution n'a jusqu'ici été apportée pour résoudre d'un coup tous ces problèmes, sans entraíner une augmentation prohibitive du prix de vente du sac, et sans modifier son mode de remplissage en usine. Il convient de noter à cet égard que les sacs en papier fort du domaine technique de l'invention sont conventionnellement livrés à plat (et non en rouleaux ou en bandes), chacun des sacs unitaires étant entraíné en dessous d'un conduit d'alimentation avant d'être refermés.No solution has so far been provided to resolve all of a sudden these problems, without causing a prohibitive increase in the selling price of bag, and without changing its factory filling mode. It should be noted at This regard that the strong paper bags of the technical field of the invention are conventionally delivered flat (and not in rolls or strips), each unit bags being driven below a front supply duct to be closed.

Quelques documents de l'art antérieur vont maintenant être présentés, afin d'illustrer les problèmes non encore résolus.Some documents of the prior art will now be presented, to illustrate the problems that have not yet been resolved.

Le document WO-A-97/46461 décrit un emballage pour aliments, en particulier pour aliments pour animaux domestiques, constitué d'un sac en papier à soufflet et à anses, cet emballage étant pourvu de bandes à boucles et bande à crochets telles que commercialisées sous la marque Velcro ®. Une première bande est placée en face interne d'un premier grand côté du sac, au voisinage du bord libre supérieur de ce premier grand côté. La deuxième bande est placée en face externe d'un second grand côté du sac, ce second grand côté étant pourvu sur son bord libre supérieur d'une échancrure placée en regard de la première bande d'accrochage. Une ligne de pliage permet le rabat de la bouche du sac les deux bandes d'accrochage venant alors en regard au travers de ladite échancrure.WO-A-97/46461 describes a packaging for food, in particular for pet food, consisting of a bag paper with bellows and handles, this packaging being provided with loop bands and hook band as marketed under the Velcro ® brand. A first strip is placed on the inside of a first long side of the bag, at the near the upper free edge of this first long side. The second strip is placed on the external face of a second large side of the bag, this second large side being provided on its upper free edge with a notch placed in look of the first hanging strip. A fold line allows the flap from the mouth of the bag the two hanging bands then coming opposite across said notch.

La réalisation décrite dans le document WO-A-97/46461 ne garantit par une fermeture sensiblement étanche du sac et implique de nombreuses opérations supplémentaires lors de la fabrication du sac : mise en place de deux bandes d'accrochage, d'une échancrure et d'une ligne de pliage supplémentaire pour le rabat de la bouche du sac. Un positionnement précis des deux parties des organes d'accrochage, de l'échancrure et de la ligne de pliage est nécessaire pour que le rabat puisse être effectué.The embodiment described in document WO-A-97/46461 does not guarantee a substantially waterproof closure of the bag and involves numerous additional operations during the production of the bag: installation of two hooking strips, a notch and a fold line extra for the flap of the mouth of the bag. Precise positioning of the two parts of the fastening members, the notch and the line of folding is necessary for the flap to be carried out.

La réalisation décrite dans le document WO-A-97/46461 n'apporte aucune sécurité vis à vis d'une ouverture malveillante, le sac n'étant pourvu d'aucun témoin de première ouverture.The embodiment described in document WO-A-97/46461 does not provide no security against a malicious opening, the bag being provided no first opening witness.

Le document FR-A-2 791 040 décrit un sac à soufflets pour le conditionnement de produits en vrac tels qu'aliments pour animaux. Le sac peut être stocké à plat, rempli, puis fermé sans nécessiter aucune modification du poste de travail correspondant. Document FR-A-2 791 040 describes a bellows bag for the packaging of bulk products such as animal feed. The bag can be stored flat, filled and closed without requiring any modification of the corresponding workstation.

La réalisation décrite dans le document FR-A-2 791 040 présente de nombreux inconvénients. En premier lieu, le sac est réalisé en employant une gaine en matière synthétique telle que polyéthylène. En second lieu, le sac est dépourvu de moyens permettant qu'il soit refermé, une ouverture de vidage étant formée par une ligne de pré-découpe placée dans un angle du fond de sac, à l'opposé de la poignée du sac.The embodiment described in document FR-A-2 791 040 presents many disadvantages. First, the bag is made using a sheath made of synthetic material such as polyethylene. Second, the bag is devoid of means allowing it to be closed, a drain opening being formed by a pre-cut line placed in a corner of the bottom of bag, opposite the bag handle.

L'invention vise à fournir un emballage à base de papier pour produits gras en grains ou poudre, sensibles à l'environnement (lumière et atmosphère), tels qu'en particulier les aliments pour animaux domestiques ou animaux d'élevage, cet emballage ne présentant pas les inconvénients de ceux connus antérieurement et permettant tout à la fois :

  • de refermer le sac, pour utiliser son contenu en plusieurs fois, les risques de dégradation du contenu du sac étant réduits ;
  • de faciliter l'ouverture et la fermeture du sac ;
  • de disposer d'un témoin de première ouverture du sac ;
  • d'éviter que le papier du sac ne soit maculé par les graisses contenues par les aliments pour animaux ou tout autre produit équivalent ;
  • de faciliter le portage manuel du sac, à l'aide d'une poignée, sans risque de déchirure du sac, et ce en dépit d'un poids de l'ordre de quelques kilogrammes d'aliments ou autre produits équivalents ;
et ceci sans modifier le processus de transport de ces sacs, livrables à plat, et sans modifier le processus de remplissage de ces sacs.The invention aims to provide a paper-based packaging for fatty products in grain or powder, sensitive to the environment (light and atmosphere), such as in particular food for domestic animals or farm animals, this packaging does not not having the drawbacks of those known previously and allowing all at the same time:
  • to close the bag, to use its contents several times, the risks of degradation of the contents of the bag being reduced;
  • facilitate the opening and closing of the bag;
  • to have a witness for the first opening of the bag;
  • to prevent the paper in the bag from being smeared by the fats contained in animal feed or any other equivalent product;
  • to facilitate the manual carrying of the bag, using a handle, without risk of tearing the bag, despite a weight of the order of a few kilograms of food or other equivalent products;
and this without modifying the transport process of these bags, which can be delivered flat, and without modifying the filling process of these bags.

A ces fins, l'invention se rapporte, selon un premier aspect, à un sac en papier à simple ou, avantageusement, à double pli, pourvu, au voisinage de son ouverture, d'une bande supportant des moyens de fermeture, cette bande formant deux voiles sensiblement en regard l'un de l'autre, seul un des deux voiles étant fixé sur la face interne du pli intérieur du sac avant son remplissage et sa fermeture.For these purposes, the invention relates, according to a first aspect, to a bag made of single or, advantageously, double-folded paper, provided in the vicinity of its opening, of a strip supporting closing means, this strip forming two sails substantially opposite one another, only one of the two sails being fixed on the inside of the inside fold of the bag before filling and its closure.

Le sac présente, selon diverses réalisations, les caractères suivants, éventuellement combinés :

  • la face interne du pli intérieur du sac est revêtue d'un matériau polymère, ce revêtement assurant une barrière contre les graisses et réduisant les risques de déchirure et perforation du sac ;
  • la bande formant deux voiles et supportant les moyens de fermeture est réalisée en un matériau polymère ;
  • le voile de la bande fixée sur la face interne du pli intérieur du sac avant son remplissage est fixé sur ce pli intérieur par soudage à chaud ou soudage haute fréquence ou soudage ultra sons ;
  • le voile de la bande fixée sur la face interne du pli intérieur et le revêtement polymère de la face interne de ce pli intérieur sont en polyéthylène et sont soudables entre eux à chaud sous pression ;
  • les moyens de fermeture comprennent un profilé mâle et un profilé femelle définissant un zip ;
  • ces profilés mâle et femelle saillent légèrement au dessus du bord supérieur du double pli du sac, de sorte à être apparents à la vue. Il n'est ainsi pas nécessaire de découper le sac aux ciseaux ou au cutter, pour pouvoir l'ouvrir ;
  • les profilés mâle et femelle s'étendent sur une longueur légèrement inférieure à celle de la largeur du sac, de sorte à permettre l'ouverture, suivant les besoins, d'une partie de la bouche du sac, formant ainsi goulot d'écoulement, ou bien encore de toute la bouche du sac lorsqu'un grand débit est souhaité ;
  • les profilés mâle et femelle peuvent être imbriqués l'un dans l'autre et séparés l'un de l'autre par l'actionnement d'un curseur coulissant, actionné manuellement ;
  • le curseur coulissant d'ouverture est relié, avant première ouverture, à l'un des profilés mâle ou femelle par un pont frangible, assurant témoin de première ouverture ;
  • le sac est pourvu de soufflets latéraux.
The bag has, according to various embodiments, the following characters, possibly combined:
  • the inner face of the inner fold of the bag is coated with a polymeric material, this coating providing a barrier against grease and reducing the risk of tearing and perforation of the bag;
  • the strip forming two webs and supporting the closure means is made of a polymer material;
  • the web of the band fixed on the internal face of the inner fold of the bag before filling is fixed on this inner fold by hot welding or high frequency welding or ultrasonic welding;
  • the web of the strip fixed to the internal face of the internal ply and the polymer coating of the internal face of this internal ply are made of polyethylene and are heat-weldable under pressure;
  • the closure means comprise a male section and a female section defining a zip;
  • these male and female sections project slightly above the upper edge of the double fold of the bag, so as to be visible to the eye. It is thus not necessary to cut the bag with scissors or a cutter, to be able to open it;
  • the male and female sections extend over a length slightly less than that of the width of the bag, so as to allow the opening, as required, of a part of the mouth of the bag, thus forming a neck of flow, or even the whole mouth of the bag when a large flow is desired;
  • the male and female profiles can be nested one inside the other and separated from each other by the actuation of a sliding cursor, actuated manually;
  • the sliding opening slider is connected, before first opening, to one of the male or female profiles by a frangible bridge, ensuring the first opening indicator;
  • the bag is provided with side gussets.

L'invention se rapporte, selon un deuxième aspect, à un sac tel que présenté ci-dessus, ce sac étant fermé et rempli, le deuxième voile de la bande supportant les moyens de fermeture étant fixé sur la face interne du pli intérieur du sac.The invention relates, according to a second aspect, to a bag such as presented above, this bag being closed and filled, the second veil of the strip supporting the closure means being fixed on the internal face of the fold inside the bag.

Selon diverses réalisations, le sac fermé présente les caractères suivants, éventuellement combinés :

  • les deux voiles de la bande supportant les moyens de fermeture sont soudés entre eux ;
  • les deux voiles de la bande supportant les moyens de fermeture sont assemblés entre eux par le biais d'un adhésif repositionnable tel que commercialisé par exemple par la société 3M ® ;
  • les deux voiles de la bande supportant les moyens de fermeture sont assemblés de manière pelable ;
  • la première séparation des deux voiles est décelable à l'oeil par dégagement d'une zone colorée ou imprimée masquée à la vue avant ouverture du sac.
According to various embodiments, the closed bag has the following characters, possibly combined:
  • the two webs of the strip supporting the closure means are welded together;
  • the two webs of the strip supporting the closure means are assembled together by means of a repositionable adhesive as sold for example by the company 3M ®;
  • the two webs of the strip supporting the closure means are peeled together;
  • the first separation of the two sails is visible to the eye by clearing a colored or printed area hidden from view before opening the bag.

L'invention se rapporte, selon un troisième aspect, à un procédé de fabrication d'un sac tel que présenté ci-dessus, ce procédé comprenant :

  • une étape de déroulement pas à pas d'une bobine de bande supportant les moyens de fermeture ;
  • puis une étape de découpe, à partir de cette bobine, d'une largeur de bande légèrement inférieure à la largeur de l'ouverture du sac ;
  • puis une étape de fixation d'un seul des deux voiles de la bande découpée sur la face interne du pli intérieur du sac, cette fixation étant effectuée alors que le sac est maintenu ouvert par des moyens d'écartement tels que des pinces.
The invention relates, according to a third aspect, to a method of manufacturing a bag as presented above, this method comprising:
  • a step of step-by-step unwinding of a tape reel supporting the closing means;
  • then a step of cutting, from this reel, a strip width slightly less than the width of the opening of the bag;
  • then a step of fixing only one of the two webs of the cut strip on the internal face of the inside fold of the bag, this fixing being carried out while the bag is kept open by spacing means such as clamps.

Selon diverses mises en oeuvre, ce procédé présente les caractères suivants, éventuellement combinés :

  • après fixation d'un seul des deux voiles de la bande, les moyens d'écartement sont désactivés et le sac remis à plat pour être ultérieurement réouvert et rempli ;
  • le sac est rempli après fixation d'un seul des deux voiles de la bande découpée, les moyens d'écartement maintenant la bouche du sac en position d'ouverture ;
  • après remplissage du sac, le deuxième voile de la bande découpée est fixé sur la face interne du pli intérieur qui lui est placé en regard ;
  • les deux voiles de la bande découpée sont assemblés entre eux par soudage ;
  • le soudage des deux voiles entre eux est assuré au moins en partie en même temps que la fixation du deuxième voile de la bande découpée ;
  • les deux opérations de soudage sont effectuées à chaud sous pression, la bande supportant les moyens de fermeture et le revêtement de la face interne du pli intérieur du sac étant réalisés en un matériau polymère tel que polyéthylène ;
  • les opérations de soudage du deuxième voile et des deux voiles entre eux sont réalisées sur la chaíne de remplissage des sacs, à la volée et en temps masqué, lors du convoyage des sacs après remplissage ;
  • la bande supportant les moyens de fermeture et les moyens de fermeture sont venus de matière ou assemblés.
According to various implementations, this process has the following characteristics, possibly combined:
  • after fixing only one of the two webs of the strip, the spacing means are deactivated and the bag laid flat to be subsequently reopened and filled;
  • the bag is filled after fixing only one of the two webs of the cut strip, the spacing means keeping the mouth of the bag in the open position;
  • after filling the bag, the second veil of the cut strip is fixed on the internal face of the inner fold which is placed opposite it;
  • the two webs of the cut strip are joined together by welding;
  • the two webs are welded together at least in part at the same time as the fixing of the second web of the cut strip;
  • the two welding operations are carried out under pressure under heat, the strip supporting the closing means and the coating of the internal face of the inner ply of the bag being made of a polymer material such as polyethylene;
  • the welding operations of the second web and the two webs between them are carried out on the bag filling line, on the fly and in masked time, during the conveying of the bags after filling;
  • the strip supporting the closing means and the closing means came in one piece or assembled.

L'invention se rapporte, selon un quatrième aspect, à l'utilisation d'un sac tel que présenté auparavant pour le conditionnement de produits alimentaires pour animaux. Ainsi que le comprendra l'homme du métier, un sac tel que présenté ci-dessus pourra être utilisé à d'autres fins telles que par exemple le conditionnement de litières pour animaux, ou produits alimentaires phytosanitaires en grains ou en poudre, secs ou peu humides.The invention relates, according to a fourth aspect, to the use of a bag as previously presented for the packaging of food products for animals. As will be understood by a person skilled in the art, a bag such as presented above can be used for other purposes such as for example the packaging of animal bedding or food products phytosanitary in grains or powder, dry or not very humid.

D'autres objets et avantages de l'invention apparaítront au cours de la description suivante de modes de réalisation, description qui va être réalisée en se référant aux dessins annexés, dans lesquels :

  • la figure 1 est une vue schématique en coupe de la partie supérieure d'un sac selon un mode de réalisation ;
  • la figure 2 est une vue de dessus d'un sac à soufflets, mis en volume, selon un mode de réalisation de l'invention.
Other objects and advantages of the invention will appear during the following description of embodiments, a description which will be made with reference to the accompanying drawings, in which:
  • Figure 1 is a schematic sectional view of the upper part of a bag according to one embodiment;
  • Figure 2 is a top view of a bellows bag, set in volume, according to one embodiment of the invention.

Le sac 1 est de type à double pli. En d'autres termes, le sac 1 comprend deux feuilles de papier non assemblées sur la totalité de leurs surfaces de contact mais fixées l'une à l'autre sur leurs bords, notamment leurs bords haut et bas.The bag 1 is of the double fold type. In other words, the bag 1 includes two unassembled sheets of paper over their entire surface area contact but fixed to each other on their edges, especially their top edges and low.

Dans un mode de mise en oeuvre, les deux feuilles sont fixées l'une à l'autre par un adhésif.In one embodiment, the two sheets are fixed one to the other by an adhesive.

La feuille ou pli extérieur est imprimable, la feuille ou pli intérieur formant barrière à la graisse.The outside sheet or fold is printable, the inside sheet or fold forming a barrier to fat.

Dans un mode de mise en oeuvre, le pli intérieur est à base de papier kraft brun sur lequel est appliqué du polyéthylène, notamment par extrusion.In one embodiment, the interior fold is paper-based brown kraft to which polyethylene is applied, in particular by extrusion.

Ainsi qu'il apparaít en figure 2, le sac est pourvu sur le pourtour de sa bouche de deux voiles 2,3, dont les faces externes 2a,3a sont aptes à être fixées sur la face interne du pli intérieur du sac.As it appears in Figure 2, the bag is provided on the periphery of its mouth of two sails 2,3, whose external faces 2a, 3a are able to be attached to the inside of the inside fold of the bag.

Dans une réalisation, les voiles 2,3 sont en matériau polymère base polyoléfine, apte à être soudé sur le polyéthylène extrudé du pli intérieur du sac.In one embodiment, the sails 2,3 are made of basic polymer material polyolefin, suitable for being welded to the extruded polyethylene of the inner fold of the bag.

Ainsi que le reconnaítra l'homme du métier, en fonction de la nature des matériaux polymères employés pour l'extrusion sur le pli intérieur du sac et pour les voiles 2,3, la soudure des voiles pourra être réalisée par chauffage, par ultrasons ou hautes fréquences.As will be recognized by those skilled in the art, depending on the nature of the polymer materials used for extrusion on the inside fold of the bag and for sails 2, 3, the sails can be welded by heating, by ultrasound or high frequencies.

Le sac est pourvu de moyens de fermeture réversibles de type zip. Les profilés mâles 4 et femelle 5 de ce type de fermeture sont schématisés sur la figure 1, étant entendu qu'un grand nombre de profils existent en soi sur le marché et peuvent être utilisés ici. Les formes des profilés 4,5 de la figure 1 ne doivent donc être vues que comme schématiques.The bag is provided with reversible zip-type closing means. The male 4 and female 5 sections of this type of closure are shown diagrammatically on the Figure 1, it being understood that a large number of profiles exist per se on the market and can be used here. The shapes of the sections 4.5 in FIG. 1 do not must therefore be seen only as schematic.

Un curseur 6 permet l'ouverture et la fermeture du zip, par séparation des profilés mâle et femelle 4,5.A cursor 6 allows the opening and closing of the zip, by separation male and female sections 4.5.

Le sac comprend des moyens formant témoins de première ouverture tels que, notamment, pont frangible reliant le curseur et un des profilés 4,5, ce pont frangible étant brisé lors de la première ouverture manuelle du zip. The bag includes first witness means opening such as, in particular, frangible bridge connecting the cursor and one of the profiles 4,5, this frangible bridge being broken during the first opening manual zip.

Les deux faces internes 2b,3b sont, le cas échéant, soudables entre elles de sorte à former un assemblage pelable, par exemple par application sur ces deux faces internes d'un adhésif repositionnable, un message pré-imprimé sur les voiles étant démasqué par suite du pelage.The two internal faces 2b, 3b can, if necessary, be welded together so as to form a peelable assembly, for example by application to these two internal sides of a repositionable adhesive, a message pre-printed on the sails being unmasked as a result of the peeling.

En variante, les deux faces internes 2b,3b ne sont pas soudables entre elles sauf sur une bande colorée d'assemblage par soudage, la séparation des voiles 2,3 démasquant cette bande colorée à la vue du consommateur.As a variant, the two internal faces 2b, 3b cannot be welded between except for a colored strip of assembly by welding, the separation of veils 2,3 unmask this colored band in plain view of the consumer.

On se reporte maintenant plus particulièrement à la figure 2.We now refer more particularly to FIG. 2.

L'un des voiles 3 est soudé sur le pli intérieur du sac tandis que l'autre voile 2 reste libre.One of the sails 3 is welded to the inside fold of the bag while the other veil 2 remains free.

Les sacs peuvent être livrés à plat et remplis en usine selon la technique conventionnelle : dépilage du sac et convoyage jusqu'au poste de remplissage où des pinces maintiennent ouverte la bouche du sac. La fermeture zip ne gêne en rien l'écoulement des produits à conditionner dans les sacs. De plus, après leur remplissage, les sacs peuvent être refermés en une seule opération : un soudage à chaud assurera à la fois la fixation sur le pli interne du sac du voile qui restait libre 2, et la fixation pelable ou le soudage éventuel des deux voiles 2,3 entre eux.The bags can be delivered flat and filled in the factory according to the technique conventional: unstacking of the bag and conveying to the filling station where clips hold the mouth of the bag open. The zip closure does not interfere in no way the flow of products to be packaged in the bags. Furthermore, after their filling, the bags can be closed in a single operation: a hot welding will ensure both the attachment to the internal fold of the veil bag which remained free 2, and the peelable fixing or the possible welding of the two sails 2.3 between them.

Les améliorations apportées au sac n'ont ainsi aucun impact sur la structure de machine de remplissage et fermeture.Improvements to the bag therefore have no impact on the filling and closing machine structure.

Les profilés 4,5 s'étendent sur sensiblement toute la largeur de la bouche du sac 1, les voiles 2,3 étant masqués à la vue par les deux plis du sac 1.Profiles 4.5 extend over substantially the entire width of the mouth of the bag 1, the sails 2,3 being hidden from view by the two folds of the bag 1.

Un mode de mise en place de cette fermeture zip va maintenant être présenté.A method of fitting this zip closure will now be present.

Dans une première étape, les sacs sont dépilés et apportés jusqu'à un premier poste, par un convoyeur. Le sac est alors ouvert grâce à l'engagement de pinces dans le sac. Les zip-curseurs sont déroulés d'une bobine, la bande de zip étant pourvue de zones 7 dans lesquelles les profilés 4,5 sont écrasés et soudés l'un contre l'autre. Ces zones 7 sont sensiblement équidistantes d'une longueur légèrement inférieure à la largeur L d'un grand côté du sac. In a first step, the bags are unstacked and brought up to a first post, by a conveyor. The bag is then opened thanks to the engagement clips in the bag. The zip-cursors are unwound from a reel, the strip of zip being provided with zones 7 in which the sections 4.5 are crushed and welded together. These zones 7 are substantially equidistant from a length slightly less than the width L of a large side of the bag.

La bobine de zip est déroulée pas à pas et est découpée au droit de chaque zone 7. Le zip découpé, pourvu de son curseur, est alors déposé dans le sac et un des voiles 2,3 est fixé sur la face interne du pli intérieur du sac.The zip coil is unwound step by step and cut at the right of each zone 7. The cut zip, provided with its cursor, is then deposited in the bag and one of the sails 2,3 is fixed on the internal face of the inside fold of the bag.

Dans un mode de mise en oeuvre, la fixation du voile est effectuée à une température de l'ordre de 230°C, sous une pression de l'ordre de 0.4N pour 15mm2, le temps de soudure étant de l'ordre de 1,5 seconde.In one embodiment, the fixing of the veil is carried out at a temperature of the order of 230 ° C, under a pressure of the order of 0.4N for 15mm2, the welding time being of the order of 1.5 seconds.

Une fois la soudure du voile effectuée, les pinces qui maintenaient le sac ouvert se retirent, le sac étant remis à plat pour empilage et palettisation.Once the veil has been welded, the clamps that held the bag open are removed, the bag being laid flat for stacking and palletizing.

Le sac 1 peut être muni de poignées, pour faciliter sa préhension, notamment pour des poids supérieurs à trois kilogrammes. Ces poignées, en papier, corde ou plastique, sont maintenues, par collage, soudage ou agrafage, notamment entre les deux plis du sac, ainsi qu'il est connu en soi.The bag 1 can be provided with handles, to facilitate its gripping, especially for weights over three kilograms. These handles, in paper, rope or plastic, are maintained, by gluing, welding or stapling, in particular between the two folds of the bag, as is known per se.

Le sac selon l'invention présente de nombreux avantages :

  • il est possible de le refermer, pour utiliser son contenu en plusieurs fois, les risques de dégradation du contenu du sac étant réduits, par suite de la relative étanchéité assurée par le contact des profilés du zip ;
  • il ne laisse pas facilement échapper d'odeurs dégagées par les produits qu'il contient ;
  • il est pourvu de témoins de première ouverture du sac ;
  • le revêtement de son pli interne permet d'éviter qu'il soit maculé par les graisses contenues par les aliments pour animaux ou tout autre produit équivalent ;
  • son portage manuel est facile, à l'aide d'une ou deux poignées, sans risque de déchirure, et ce en dépit d'un poids de l'ordre de quelques kilogrammes d'aliments ou autre produits équivalents ;
  • restant à base papier, son recyclage pose moins de problème que celui de complexes ou multicouches et son prix reste modique ;
  • son utilisation n'implique pas la transformation de la structure des machines de remplissage ;
  • il reste livrable à plat, en palettes usuelles.
The bag according to the invention has many advantages:
  • it is possible to close it, to use its contents several times, the risks of deterioration of the contents of the bag being reduced, as a result of the relative tightness ensured by the contact of the profiles of the zip;
  • it does not easily allow odors from the products it contains to escape;
  • it is provided with witnesses of the first opening of the bag;
  • the coating of its internal fold makes it possible to prevent it from being smeared by the fats contained in animal feed or any other equivalent product;
  • its manual carrying is easy, using one or two handles, without risk of tearing, and this despite a weight of the order of a few kilograms of food or other equivalent products;
  • remaining paper-based, recycling is less of a problem than that of complex or multi-layer and its price remains low;
  • its use does not imply the transformation of the structure of the filling machines;
  • it remains available flat, in usual pallets.

Claims (26)

Sac en papier à simple ou double pli, caractérisé en ce qu'il est pourvu, au voisinage de son ouverture, d'une bande supportant des moyens de fermeture, cette bande formant deux voiles (2,3) sensiblement en regard l'un de l'autre, seul un des deux voiles étant fixé sur la face interne du pli intérieur du sac avant son remplissage et sa fermeture.Single or double fold paper bag, characterized in that it is provided, in the vicinity of its opening, with a strip supporting closure means, this strip forming two sails (2,3) substantially facing one on the other, only one of the two sails being attached to the inner face of the inner fold of the bag before it is filled and closed. Sac en papier selon la revendication 1, caractérisé en ce que la face interne du pli intérieur du sac est revêtue d'un matériau polymère.Paper bag according to claim 1, characterized in that the inner face of the inner fold of the bag is coated with a polymeric material. Sac selon la revendication 1 ou 2, caractérisé en ce que la bande formant deux voiles (2,3) et supportant les moyens de fermeture est réalisée en un matériau polymère.Bag according to claim 1 or 2, characterized in that the strip forming two sails (2,3) and supporting the closure means is made of a polymer material. Sac selon la revendication 2 et 3, caractérisé en ce que le voile de la bande fixée sur la face interne du pli intérieur du sac avant son remplissage est fixée sur ce pli intérieur par soudage à chaud ou soudage haute fréquence ou soudage ultra sons.Bag according to claim 2 and 3, characterized in that the web of the strip fixed on the internal face of the internal fold of the bag before its filling is fixed on this internal fold by hot welding or high frequency welding or ultrasonic welding. Sac selon la revendication 4, caractérisé en ce que le voile de la bande fixée sur la face interne du pli intérieur et le revêtement polymère de la face interne de ce pli intérieur sont en polyéthylène et sont soudables entre eux à chaud sous pression.Bag according to claim 4, characterized in that the web of the strip fixed on the internal face of the internal ply and the polymer coating of the internal face of this internal ply are made of polyethylene and are heat-weldable under pressure. Sac selon l'une quelconque des revendications 1 à 5, caractérisé en ce que les moyens de fermeture comprennent un profilé mâle et un profilé femelle (4,5) définissant un zip. Bag according to any one of claims 1 to 5, characterized in that the closure means comprise a male section and a female section (4,5) defining a zip. Sac selon la revendication 6, caractérisé en ce que ces profilés mâle et femelle (4,5) saillent légèrement au dessus du bord supérieur du double pli du sac, de sorte à être apparents à la vue.Bag according to claim 6, characterized in that these male and female sections (4,5) project slightly above the upper edge of the double fold of the bag, so as to be visible to the view. Sac selon la revendication 6 ou 7, caractérisé en ce que les profilés mâle et femelle (4,5) s'étendent sur une longueur légèrement inférieure à celle de la largeur du sac.Bag according to claim 6 or 7, characterized in that the male and female sections (4,5) extend over a length slightly less than that of the width of the bag. Sac selon l'une quelconque des revendications 6 à 8, caractérisé en ce que les profilés mâle et femelle (4,5) peuvent être imbriqués l'un dans l'autre et séparés l'un de l'autre par l'actionnement d'un curseur coulissant (6).Bag according to any one of claims 6 to 8, characterized in that the male and female sections (4,5) can be nested one inside the other and separated from each other by actuation d 'a sliding cursor (6). Sac selon la revendication 9, caractérisé en ce que le curseur coulissant (6) d'ouverture est relié, avant première ouverture, à l'un des profilés mâle ou femelle (4,5) par un pont frangible.Bag according to claim 9, characterized in that the sliding opening slider (6) is connected, before first opening, to one of the male or female sections (4,5) by a frangible bridge. Sac selon l'une quelconque des revendications 1 à 10, caractérisé en ce qu'il est pourvu de soufflets latéraux.Bag according to any one of Claims 1 to 10, characterized in that it is provided with lateral bellows. Sac selon l'une quelconque des revendications 1 à 11, ce sac étant fermé, le deuxième voile de la bande supportant les moyens de fermeture étant fixé sur la face interne du pli intérieur du sac.Bag according to any one of Claims 1 to 11, this bag being closed, the second web of the strip supporting the closing means being attached to the inside of the inside fold of the bag. Sac selon la revendication 12, caractérisé en ce que les deux voiles de la bande supportant les moyens de fermeture sont soudés entre eux.Bag according to claim 12, characterized in that the two webs of the strip supporting the closure means are welded together. Sac selon la revendication 12, caractérisé en ce que les deux voiles de la bande supportant les moyens de fermeture sont assemblés entre eux par le biais d'un adhésif repositionnable. Bag according to claim 12, characterized in that the two webs of the strip supporting the closure means are assembled together by means of a repositionable adhesive. Sac selon la revendication 12, caractérisé en ce que les deux voiles de la bande supportant les moyens de fermeture sont assemblés de manière pelable.Bag according to claim 12, characterized in that the two webs of the strip supporting the closure means are assembled in a peelable manner. Sac selon l'une quelconque des revendications 13 à 15, caractérisé en ce que la première séparation des deux voiles (2,3) est décelable à l'oeil par dégagement d'une zone colorée ou imprimée masquée à la vue avant ouverture du sac.Bag according to any one of claims 13 to 15, characterized in that the first separation of the two sails (2,3) is visible to the eye by clearing a colored or printed area hidden from view before opening the bag . Procédé de fabrication d'un sac tel que présenté dans l'une quelconque des revendications 1 à 16, caractérisé en ce qu'il comprend : une étape de déroulement pas à pas d'une bobine de bande supportant les moyens de fermeture ; puis une étape de découpe, à partir de cette bobine, d'une largeur de bande légèrement inférieure à la largeur de l'ouverture du sac ; puis une étape de fixation d'un seul des deux voiles de la bande découpée sur la face interne du pli intérieur du sac, cette fixation étant effectuée alors que le sac est maintenu ouvert par des moyens d'écartement tels que des pinces. Method for manufacturing a bag as presented in any one of Claims 1 to 16, characterized in that it comprises: a step of step-by-step unwinding of a tape reel supporting the closing means; then a step of cutting, from this reel, a strip width slightly less than the width of the opening of the bag; then a step of fixing only one of the two webs of the cut strip on the internal face of the inside fold of the bag, this fixing being carried out while the bag is kept open by spacing means such as clamps. Procédé selon la revendication 17, caractérisé en ce qu'après fixation d'un seul des deux voiles (2,3) de la bande, les moyens d'écartement sont désactivés et le sac remis à plat pour être ultérieurement réouvert et rempli.Method according to claim 17, characterized in that after fixing only one of the two webs (2,3) of the strip, the spacing means are deactivated and the bag laid flat to be subsequently reopened and filled. Procédé selon la revendication 17,caractérisé en ce que le sac (1) est rempli après fixation d'un seul des deux voiles (2,3) de la bande découpée, les moyens d'écartement maintenant la bouche du sac en position d'ouverture.Method according to claim 17, characterized in that the bag (1) is filled after fixing only one of the two webs (2,3) of the cut strip, the spacing means keeping the mouth of the bag in the position of opening. Procédé selon la revendication 18 ou 19, caractérisé en ce que, après remplissage du sac, le deuxième voile de la bande découpée est fixé sur la face interne du pli intérieur qui lui est placé en regard. Method according to claim 18 or 19, characterized in that , after filling the bag, the second veil of the cut strip is fixed on the internal face of the inner fold which is placed opposite it. Procédé selon la revendication 20, caractérisé en ce que les deux voiles de la bande découpée sont assemblés entre eux par soudage.Method according to claim 20, characterized in that the two webs of the cut strip are joined together by welding. Procédé selon la revendication 21, caractérisé en ce que le soudage des deux voiles entre eux est assuré au moins en partie en même temps que la fixation du deuxième voile de la bande découpée.Method according to claim 21, characterized in that the welding of the two webs to one another is provided at least in part at the same time as the fixing of the second web of the cut strip. Procédé selon la revendication 22, caractérisé en ce que les deux opérations de soudage sont effectuées à chaud sous pression, la bande supportant les moyens de fermeture et le revêtement de la face interne du pli intérieur du sac étant réalisée en un matériau polymère tel que polyéthylène.Method according to claim 22, characterized in that the two welding operations are carried out under hot pressure, the strip supporting the closure means and the coating of the internal face of the inner fold of the bag being made of a polymer material such as polyethylene . Procédé selon l'une quelconque des revendications 20 à 23, caractérisé en ce que les opérations de soudage du deuxième voile et des deux voiles entre eux sont réalisées sur la chaíne de remplissage des sacs, à la volée, lors du convoyage des sacs après remplissage.Method according to any one of claims 20 to 23, characterized in that the operations of welding the second web and the two webs between them are carried out on the bag filling line, on the fly, during the conveying of the bags after filling . Procédé selon l'une quelconque des revendications 17 à 24, caractérisé en ce que la bande supportant les moyens de fermeture et les moyens de fermeture sont venus de matière ou assemblés.Method according to any one of claims 17 to 24, characterized in that the strip supporting the closing means and the closing means have come in one piece or assembled. Utilisation d'un sac tel que présenté dans l'une quelconque des revendications 1 à 16 pour le conditionnement de produits alimentaires, le conditionnement de produits phytosanitaires en grains ou en poudre, secs ou peu humides.Use of a bag as presented in any of the claims 1 to 16 for the packaging of food products, the packaging of phytosanitary products in grain or powder, dry or not very humid.
EP03370005A 2002-01-22 2003-01-21 Double-ply paper bag, method for production and use of said bag Expired - Lifetime EP1332967B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0200776A FR2834970B1 (en) 2002-01-22 2002-01-22 DOUBLE-FOLD PAPER BAG, METHOD FOR MANUFACTURING SUCH A BAG, AND USE OF SUCH A BAG FOR PACKAGING FOOD PRODUCTS FOR ANIMALS
FR0200776 2002-01-22

Publications (2)

Publication Number Publication Date
EP1332967A1 true EP1332967A1 (en) 2003-08-06
EP1332967B1 EP1332967B1 (en) 2005-06-29

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EP03370005A Expired - Lifetime EP1332967B1 (en) 2002-01-22 2003-01-21 Double-ply paper bag, method for production and use of said bag

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US (1) US20030138168A1 (en)
EP (1) EP1332967B1 (en)
AT (1) ATE298702T1 (en)
DE (1) DE60300896T2 (en)
ES (1) ES2243880T3 (en)
FR (1) FR2834970B1 (en)

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DE102019132879A1 (en) * 2019-12-03 2021-06-10 Henkel Ag & Co. Kgaa Paper packaging with child-proof closure

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Also Published As

Publication number Publication date
US20030138168A1 (en) 2003-07-24
EP1332967B1 (en) 2005-06-29
FR2834970A1 (en) 2003-07-25
DE60300896T2 (en) 2006-05-11
FR2834970B1 (en) 2004-11-19
DE60300896D1 (en) 2005-08-04
ES2243880T3 (en) 2005-12-01
ATE298702T1 (en) 2005-07-15

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