EP0301148A1 - Insulated bag - Google Patents

Insulated bag Download PDF

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Publication number
EP0301148A1
EP0301148A1 EP87440055A EP87440055A EP0301148A1 EP 0301148 A1 EP0301148 A1 EP 0301148A1 EP 87440055 A EP87440055 A EP 87440055A EP 87440055 A EP87440055 A EP 87440055A EP 0301148 A1 EP0301148 A1 EP 0301148A1
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EP
European Patent Office
Prior art keywords
sheets
bag
face
polyethylene
bags
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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
EP87440055A
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German (de)
French (fr)
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EP0301148B1 (en
Inventor
Luigi Frateschi
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Individual
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Individual
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Publication date
Application filed by Individual filed Critical Individual
Priority to AT87440055T priority Critical patent/ATE70019T1/en
Publication of EP0301148A1 publication Critical patent/EP0301148A1/en
Application granted granted Critical
Publication of EP0301148B1 publication Critical patent/EP0301148B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/38—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation
    • B65D81/3888—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags
    • B65D81/3893—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents with thermal insulation wrappers or flexible containers, e.g. pouches, bags formed with double walls, i.e. hollow

Definitions

  • the present invention relates to bags intended for the transport of so-called frozen products, which must be carried out under isothermal conditions for the preservation of these products.
  • the most rustic realization comprises two paper bags housed one inside the other.
  • the air layer between the two bags is so thin that the real but very relative insulation provided by this means is only useful for very short transport in moderate climatic conditions.
  • a much more efficient embodiment consists in making a double-walled bag each consisting of two sheets of flexible plastic material, generally of polyethylene, separated by a layer of foam or fiber material, ensuring the spacing between the two sheets and the presence of air in the space separating them.
  • the effectiveness of these bags is satisfactory, but the presence of the spacer material has the disadvantage of making the walls of the bag relatively rigid, while it is desirable on the contrary, that a bag is flexible to conform to the trans products. - doors.
  • the present invention aims to eliminate all the drawbacks of previously known insulated bags, by proposing a new double-walled polyethylene bag, having both excellent insulation qualities and perfect flexibility. It also relates to a simple process for the manufacture of these new bags.
  • the new insulated bag has double walls made of polyethylene sheet, as is known, but the material ensuring the spacing between the two walls is constituted by a sheet of also known type, in the form of a thin polyethylene film on one side of which are distributed bubbles or blisters filled with air.
  • a sheet is used for wrapping and packaging fragile objects, because of its mechanical qualities, the bubbles exerting a protective action against shocks, but it had never been used for other applications.
  • such a sheet has a uniform thickness, equal to the thickness of the bubbles, therefore ensures in the bag according to the invention double walls separated by a layer of air of constant thickness, which guarantees uniform insulation properties. throughout the volume of the bag, and at the same time, it has the flexibility of the film carrying the bubbles, since these bubbles do not hinder the deformations of this film. Since the bubble sheet is much lighter than the previous foam or fiber material, such a bag is therefore both perfectly effective and more comfortable and pleasant to use than all the bags previously offered for this use.
  • the invention also relates to a simple process for the manufacture of these bags.
  • This process is of the continuous type, and consists in continuously simultaneously extruding two sheets of polyethylene, in folding together along their middle these two sheets, in simultaneously causing the welding and the cutting at equal longitudinal intervals of the product constituted by the two sheets. thus folded, to form blanks for bags to insert between the two walls a bubble wrap as defined above and finally to weld on the edges exterior of this blank reinforcement strips comprising handles, this weld immobilizing at the same time the corresponding edges of the bubble wrap.
  • This welding has a multiple role: to stiffen the two edges of the bags, to immobilize the edge of the films 3-4 to prevent them from sliding into the bottom of the space between the sheets 1-2, and ensure, by press stud systems 7-8, the closing of the top of the bags.
  • the final product C obtained at the end of the operation, conforms to that illustrated in section on a larger scale in FIG. 1.
  • the bag has a continuous double wall, the two faces of which are kept at constant distance by air bubbles 4, themselves providing thermal insulation, without affecting the flexibility of this wall, provided by the thinness of the film 3.

Abstract

Insulated bag of the type with a double wall, consisting of a pair of polyethylene sheets (1, 2) held apart by a material (3) ensuring the presence of a layer of air, characterised in that the said material is of the type formed by a thin and flexible film which carries, on one face, bubbles or blisters of constant thickness and which are uniformly distributed over this face. <IMAGE>

Description

La présente invention concerne les sacs destinés au transport des produits dits surgelés, qui doit s'effectuer en conditions isothermes pour la préservation de ces produits.The present invention relates to bags intended for the transport of so-called frozen products, which must be carried out under isothermal conditions for the preservation of these products.

Ces sacs sont de manière générale à "double paroi", l'air emprisonné entre les deux feuilles constituant chaque face de sac étant supposé assurer une isolation thermique suffisante.These bags are generally "double walled", the air trapped between the two sheets constituting each side of the bag being assumed to provide sufficient thermal insulation.

Toutefois, toutes les réalisations de ces sacs proposées au public souffrent de plusieurs inconvénients.However, all the achievements of these bags offered to the public suffer from several drawbacks.

La réalisation la plus rustique comporte deux sacs en papier logés l'un dans l'autre. La couche d'air entre les deux sacs est si mince que l'isolation réelle mais toute relative, procurée par ce moyen, n'est utile que pour un très court transport dans des conditions climatiques modérées.The most rustic realization comprises two paper bags housed one inside the other. The air layer between the two bags is so thin that the real but very relative insulation provided by this means is only useful for very short transport in moderate climatic conditions.

Une réalisation beaucoup plus efficace consiste à réaliser un sac à doubles parois constituées chacune de deux feuilles de matériau plastique souple, généralement de polyéthylène, séparées par une couche de matériau en mousse ou en fibres, assurant l'écartement entre les deux feuilles et la présence d'air dans l'espace les séparant. L'efficacité de ces sacs est satisfaisante, mais la présence du matériau d'écartement a pour inconvénient de rendre les parois du sac relativement rigides, alors qu'il est souhaitable au contraire, qu'un sac soit souple pour se conformer aux produits trans- portés.A much more efficient embodiment consists in making a double-walled bag each consisting of two sheets of flexible plastic material, generally of polyethylene, separated by a layer of foam or fiber material, ensuring the spacing between the two sheets and the presence of air in the space separating them. The effectiveness of these bags is satisfactory, but the presence of the spacer material has the disadvantage of making the walls of the bag relatively rigid, while it is desirable on the contrary, that a bag is flexible to conform to the trans products. - doors.

La présente invention vise à éliminer tous les incon­vénients des sacs isothermes antérieurement connus, en pro­posant un nouveau sac à doubles parois en polyéthylène, possédant à la fois d'excellentes qualités d'isolation et une souplesse parfaite. Elle vise également un procédé simple pour la fabrication de ces nouveaux sacs.The present invention aims to eliminate all the drawbacks of previously known insulated bags, by proposing a new double-walled polyethylene bag, having both excellent insulation qualities and perfect flexibility. It also relates to a simple process for the manufacture of these new bags.

Selon l'invention, le nouveau sac isotherme comporte des doubles parois en feuille de polyéthylène, comme il est connu, mais le matériau assurant l'écartement entre les deux parois est constitué par une feuille de type également connu, se pré­sentant sous forme d'une pellicule mince de polyéthylène sur une face de laquelle sont réparties des bulles ou boursouflures remplies d'air. Une telle feuille est utilisée pour l'emballage et le conditionnement d'objets fragiles, en raison de ses qualités mécaniques, les bulles exerçant une action protectrice contre les chocs, mais elle n'avait jamais encore été utilisée pour d'autres applications.According to the invention, the new insulated bag has double walls made of polyethylene sheet, as is known, but the material ensuring the spacing between the two walls is constituted by a sheet of also known type, in the form of a thin polyethylene film on one side of which are distributed bubbles or blisters filled with air. Such a sheet is used for wrapping and packaging fragile objects, because of its mechanical qualities, the bubbles exerting a protective action against shocks, but it had never been used for other applications.

Or une telle feuille présente une épaisseur uniforme, égale à l'épaisseur des bulles, donc assure dans le sac selon l'invention des doubles parois séparées par une couche d'air d'épaisseur constante, ce qui garantit des propriétés d'iso­lation uniformes dans tout le volume du sac, et en même temps, elle possède la souplesse de la pellicule portant les bulles, puisque ces bulles ne gênent nullement les déformations de cette pellicule. La feuille à bulles étant au surplus beaucoup plus légère que le matériau en mousse ou en fibres antérieur, un tel sac est donc à la fois parfaitement efficace et d'un usage plus commode et agréable que tous les sacs antérieurement proposés à cet usage.However, such a sheet has a uniform thickness, equal to the thickness of the bubbles, therefore ensures in the bag according to the invention double walls separated by a layer of air of constant thickness, which guarantees uniform insulation properties. throughout the volume of the bag, and at the same time, it has the flexibility of the film carrying the bubbles, since these bubbles do not hinder the deformations of this film. Since the bubble sheet is much lighter than the previous foam or fiber material, such a bag is therefore both perfectly effective and more comfortable and pleasant to use than all the bags previously offered for this use.

L'invention vise également un procédé simple pour la fabrication de ces sacs. Ce procédé est du type continu, et consiste à extruder en continu simultanément deux feuilles de polyéthylène, à replier ensemble le long de leur milieu ces deux feuilles, à provoquer simultanément la soudure et la coupe à intervalles longitudinaux égaux du produit constitué par les deux feuilles ainsi repliées, pour constituer des ébauches de sacs à insérer entre les deux parois une pellicule à bulles telle que définie ci-dessus et enfin à souder sur les bords extérieurs de cette ébauche des bandes de renforcement comportant des poignées, cette soudure immobilisant en même temps les bords correspondants des pellicules à bulles.The invention also relates to a simple process for the manufacture of these bags. This process is of the continuous type, and consists in continuously simultaneously extruding two sheets of polyethylene, in folding together along their middle these two sheets, in simultaneously causing the welding and the cutting at equal longitudinal intervals of the product constituted by the two sheets. thus folded, to form blanks for bags to insert between the two walls a bubble wrap as defined above and finally to weld on the edges exterior of this blank reinforcement strips comprising handles, this weld immobilizing at the same time the corresponding edges of the bubble wrap.

On comprendra mieux l'invention en se référant à la description suivante illustrée par le dessin annexé, sur lequel:

  • - la figure 1 représente en coupe transversale un sac selon l'invention, et
  • - la figure 2 illustre schématiquement le procédé selon l'invention.
The invention will be better understood by referring to the following description illustrated by the appended drawing, in which:
  • FIG. 1 represents in cross section a bag according to the invention, and
  • - Figure 2 schematically illustrates the method according to the invention.

Sur ce dessin, on a représenté en 1 et 2 les deux feuilles de polyéthylène destinées à constituer les doubles parois d'un sac C, arrivant parallèlement d'une tête d'extrusion (non représentée). Ces deux feuilles sont progressivement repliées le long de leur axe longitudinal XX', de manière à former un prôduit plat P, qui est alors soumis à intervalles longitudinaux égaux à une soudure-coupe, schématisée par S, donnant naissance à des ébauches de sacs E, à double paroi continue, 1-2. Entre les feuilles 1 et 2, on insère alors des pellicules 3 portant des bulles ou boursouflures et occupant la totalité de l'espace entre les feuilles 1 et 2. Enfin, sur les bords extérieurs des ébauches E, on soude des bandes 5, comportant des poignées 6. Cette soudure a un rôle multiple : rigidifier les deux bords des sacs, immobiliser le bord des pellicules 3-4 pour les empêcher de glisser au fond de l'espace entre les feuilles 1-2, et assurer, par des systèmes à boutons-pressions 7-8 la fermeture du haut des sacs.In this drawing, there are shown in 1 and 2 the two polyethylene sheets intended to constitute the double walls of a bag C, arriving in parallel with an extrusion head (not shown). These two sheets are progressively folded along their longitudinal axis XX ′, so as to form a flat product P, which is then subjected to longitudinal welds equal to a weld-cut, shown diagrammatically by S, giving rise to blanks of bags E , double wall continuous, 1-2. Between the sheets 1 and 2, films 3 are then inserted bearing bubbles or blisters and occupying the entire space between the sheets 1 and 2. Finally, on the outer edges of the blanks E, strips 5 are welded, comprising handles 6. This welding has a multiple role: to stiffen the two edges of the bags, to immobilize the edge of the films 3-4 to prevent them from sliding into the bottom of the space between the sheets 1-2, and ensure, by press stud systems 7-8, the closing of the top of the bags.

Le produit final C, obtenu en fin d'opération, est conforme à celui illustré en coupe à plus grande échelle sur la figure 1. Le sac possède une double paroi continue dont les deux faces sont maintenues à distance constante par les bulles d'air 4, assurant elles mêmes l'isolation thermique, sans nuire à la souplesse de cette paroi, assurée par la minceur de la pellicule 3.The final product C, obtained at the end of the operation, conforms to that illustrated in section on a larger scale in FIG. 1. The bag has a continuous double wall, the two faces of which are kept at constant distance by air bubbles 4, themselves providing thermal insulation, without affecting the flexibility of this wall, provided by the thinness of the film 3.

Claims (3)

1. Sac isotherme, du type à double paroi constitué par un couple de feuilles de polyéthylène maintenues écartées par un matériau assurant la présence d'une couche d'air, caractérisé en ce que ledit matériau est du type formé par une pellicule mince et souple portant sur une face des bulles ou boursouflures d'épaisseur constante et régulièrement réparties sur cette face.1. Insulated bag, of the double wall type constituted by a pair of polyethylene sheets kept apart by a material ensuring the presence of an air layer, characterized in that said material is of the type formed by a thin and flexible film bearing on one face bubbles or blisters of constant thickness and regularly distributed on this face. 2. Sac selon la revendication 1, caractérisé en ce que le rebord supérieur de chaque face du sac est constitué par une bande de polyéthylène soudée à la fois aux deux feuilles extérieurs constituant la paroi et à la pellicule à bulles.2. Bag according to claim 1, characterized in that the upper rim of each face of the bag consists of a polyethylene strip welded to both the two outer sheets constituting the wall and to the bubble wrap. 3. Procédé pour la fabrication du sac selon les revendications 1 et 2 caractérisé en ce qu"il consiste à extruder en continu simultanément deux feuilles de polyéthylène, à replier ensemble le long de leur milieu ces deux feuilles, à provoquer simultanément la soudure et la coupe à intervalles longitudinaux égaux du produit constitué par les deux feuilles ainsi repliées, pour constituer des ébauches de sacs à insérer entre les deux feuilles une pellicule à bulles telle que définie ci-dessus et enfin à souder sur les bords extérieurs de cette ébauche des bandes de renforcement com­portant des poignées, cette soudure immobilisant en même temps les bords correspondants des pellicules à bulles.3. A method for manufacturing the bag according to claims 1 and 2 characterized in that it consists in simultaneously simultaneously extruding two sheets of polyethylene, in folding together along their middle these two sheets, in simultaneously causing the welding and the cutting at equal longitudinal intervals of the product constituted by the two sheets thus folded, to constitute blanks of bags to insert between the two sheets a bubble wrap as defined above and finally to weld on the outer edges of this blank strips reinforcement comprising handles, this weld immobilizing at the same time the corresponding edges of the bubble wrap.
EP87440055A 1987-07-31 1987-09-17 Insulated bag Expired - Lifetime EP0301148B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87440055T ATE70019T1 (en) 1987-07-31 1987-09-17 INSULATION BAG.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8711085A FR2618765B1 (en) 1987-07-31 1987-07-31 COOLER BAG
FR8711085 1987-07-31

Publications (2)

Publication Number Publication Date
EP0301148A1 true EP0301148A1 (en) 1989-02-01
EP0301148B1 EP0301148B1 (en) 1991-12-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP87440055A Expired - Lifetime EP0301148B1 (en) 1987-07-31 1987-09-17 Insulated bag

Country Status (6)

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EP (1) EP0301148B1 (en)
JP (1) JPS6458684A (en)
AT (1) ATE70019T1 (en)
DE (1) DE3775056D1 (en)
FR (1) FR2618765B1 (en)
MC (1) MC1842A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710608A1 (en) * 1994-11-01 1996-05-08 Oria Seeff Insulated carrying container
US5595320A (en) * 1994-12-01 1997-01-21 Aghassipour; Xerxes K. Insulated bag for beer keg
US5706969A (en) * 1995-03-27 1998-01-13 Nippon Sanso Corporation Insulated container, insulating material, and manufacturing method of the insulated container
US6200029B1 (en) * 2000-01-05 2001-03-13 David G. Bonta Heat retaining container and method of forming same
FR2845352A1 (en) * 2002-10-08 2004-04-09 Papiers Paviot Package and procedure for conserving perishable products uses pouches on each side of central pouch to contain substance maintaining conservation temperature
WO2006095038A2 (en) * 2005-03-11 2006-09-14 Sensigrade Limited Isothermal container comprising a refrigeration element

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0356543U (en) * 1989-10-03 1991-05-30
JPH1047712A (en) * 1996-08-06 1998-02-20 Kansai Electric Power Co Inc:The Cooling and heating system
CN104603021B (en) * 2012-08-06 2019-08-06 宝洁公司 The method for manufacturing flexible container
JP6569028B2 (en) * 2017-10-05 2019-08-28 奈津子 小川 Cold insulation packaging material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2394390A1 (en) * 1977-06-16 1979-01-12 Peckre Freres Et Turpin Ets METHOD OF MANUFACTURING A FLAT MULTI-LAYER PACKAGING AND PACKAGING THUS MANUFACTURED
EP0085534A1 (en) * 1982-01-28 1983-08-10 The British Petroleum Company p.l.c. Insulating container, especially insulating carrier or insulating bag
EP0174159A2 (en) * 1984-08-30 1986-03-12 Douglas Kitchener Gatward Insulated carrier bag
EP0251757A2 (en) * 1986-06-30 1988-01-07 Nomix Manufacturing Co. Limited Flexible containers for liquids

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2394390A1 (en) * 1977-06-16 1979-01-12 Peckre Freres Et Turpin Ets METHOD OF MANUFACTURING A FLAT MULTI-LAYER PACKAGING AND PACKAGING THUS MANUFACTURED
EP0085534A1 (en) * 1982-01-28 1983-08-10 The British Petroleum Company p.l.c. Insulating container, especially insulating carrier or insulating bag
EP0174159A2 (en) * 1984-08-30 1986-03-12 Douglas Kitchener Gatward Insulated carrier bag
EP0251757A2 (en) * 1986-06-30 1988-01-07 Nomix Manufacturing Co. Limited Flexible containers for liquids

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0710608A1 (en) * 1994-11-01 1996-05-08 Oria Seeff Insulated carrying container
US5624048A (en) * 1994-11-01 1997-04-29 Sander; Ronen Insulated carrying container
AU694152B2 (en) * 1994-11-01 1998-07-16 Seeff, Oria Insulated carrying container
US5595320A (en) * 1994-12-01 1997-01-21 Aghassipour; Xerxes K. Insulated bag for beer keg
US5706969A (en) * 1995-03-27 1998-01-13 Nippon Sanso Corporation Insulated container, insulating material, and manufacturing method of the insulated container
US6200029B1 (en) * 2000-01-05 2001-03-13 David G. Bonta Heat retaining container and method of forming same
FR2845352A1 (en) * 2002-10-08 2004-04-09 Papiers Paviot Package and procedure for conserving perishable products uses pouches on each side of central pouch to contain substance maintaining conservation temperature
WO2004033338A1 (en) * 2002-10-08 2004-04-22 Papiers A Paviot Method for packaging perishable products and package for perishable products
WO2006095038A2 (en) * 2005-03-11 2006-09-14 Sensigrade Limited Isothermal container comprising a refrigeration element
WO2006095038A3 (en) * 2005-03-11 2006-11-02 Sensigrade Ltd Isothermal container comprising a refrigeration element

Also Published As

Publication number Publication date
ATE70019T1 (en) 1991-12-15
DE3775056D1 (en) 1992-01-16
FR2618765A1 (en) 1989-02-03
EP0301148B1 (en) 1991-12-04
MC1842A1 (en) 1988-09-30
JPS6458684A (en) 1989-03-06
FR2618765B1 (en) 1990-01-26

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