Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • 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
  • B65D81/3897—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 of different materials, e.g. laminated or foam filling between walls
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
  • B31B2155/00—Flexible containers made from webs
• • 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
  • B31B2170/00—Construction of flexible containers
  • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined

Definitions

• Isothermal packaging which makes it possible to maintain hot or cold food products at an acceptable temperature for a certain period of time.
• These packaging are generally used to transport a hot or cold product from the place where it is bought to the place where it is consumed or to the place (fridges, freezers, etc.) where it is kept or stored before being consumed .
• the subject of the present invention is an isothermal packaging which makes it possible at least to double, whatever conditions and proportions are kept, the time during which the product is maintained at an acceptable temperature, that is to say lying above or below. depending on the case of the critical temperature.
• This packaging which is constituted by an envelope provided with an opening for the introduction and the withdrawal of the product, is characterized in that the walls of the envelope are each formed of several sheets delimiting between them at least one closed space. filled with a fluid.
• the attached drawing shows schematically and by way of nonlimiting example an embodiment of the object of the invention and illustrates a method of manufacturing this embodiment of the packaging according to the invention.
• Figure 1 is a plan view of the empty packaging.
• Figure 2 is a section through line II-II of the figure similar to Figure 2, of the package containing a product.
• Figure 4 / Figures 5 to 9 illustrate the various operations of the manufacturing process of this packaging.
• the packaging shown in FIGS. 1 to 4 consists of a flat, flexible envelope 10, of rectangular shape, the two walls 11 and 12 of which are welded on three sides so as to provide an opening 13 for the introduction and removal of the product.
• the walls 11 and 12 are each provided with two sheets 14, 15 which limit between them pockets 16 and 17 filled with air or a gas with low heat transmission power at a pressure slightly higher than atmospheric pressure.
• the pockets 16 and 17 are connected together, on the side opposite to the opening 13 by a passage 18.
• the sheets 14, 15, which are found in the c ⁇ merce, are constituted by a plastic layer 19 and by a metallized layer 20.
• the product to be transported is introduced into the packaging through the opening 13 then the envelope is wound from this opening until the product is well held, then the wound part is fixed with one or two clips optionally with ad hoc closing means incorporated or not in the packaging, these means being able to be equipped with a gripping device.
• the thickness of the air layer increases more or less depending on the volume of the product.
• the thermal barrier formed by this layer of air and by the double thickness of the walls they are made up of isothermal sheets allows products transported or stored to be kept for several hours at temperatures close to their conservation temperatures. It will be noted that this thermal barrier does not present a solution of continuity at the bottom of the packaging thanks to the passage 18. This is particularly important in view of the fact that the bottom of known isothermal packaging is generally the place where the heat exchanges - from outside to inside or vice versa - are the largest.
• the isothermal packaging thus produced may be stored in refrigerated enclosures before being used so as to make it possible to significantly extend the period during which the product. is kept at an acceptable temperature.
• the packaging manufacturing process illustrated in Figures 5 to 9 is particularly economical.
• This process consists of superimposing these two sheets, plastic layer against plastic layer, by coinciding from two rectangular sheets of the type represented in FIG. 4, one of which A is longer and wider than the other B (FIG. 5). their short sides and forming a corrugation C to absorb the excess length of the sheet A (figure 6), to heat weld the two sheets along strips D (figure 7), to fold one against the other the two halves of the two sheets thus welded (fig. 8), to heat weld the corresponding edges E of the sheet A, to blow during this last operation air or a suitable gas in the pockets 16 and 18 in formation .
• the welding operations can be grouped together (fig. 7 and 9) in a single operation after having folded down, by positioning them suitably, the two sheets A and B (fig. 8).

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Packages (AREA)
• Bag Frames (AREA)
• Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
• Optical Record Carriers And Manufacture Thereof (AREA)

Priority Applications (1)

Applications Claiming Priority (1)

Publications (2)

Family

ID=4541145

Family Applications (1)

Country Status (6)

Families Citing this family (15)

Family Cites Families (16)

• 1984
  • 1984-10-30 WO PCT/CH1984/000174 patent/WO1986002619A1/fr not_active Ceased
  • 1984-10-30 DE DE8484903944T patent/DE3482105D1/de not_active Expired - Lifetime
  • 1984-10-30 EP EP84903944A patent/EP0199716B1/de not_active Expired - Lifetime
  • 1984-10-30 AT AT84903944T patent/ATE53812T1/de not_active IP Right Cessation
  • 1984-10-30 US US06/887,836 patent/US4755064A/en not_active Expired - Fee Related
  • 1984-10-30 JP JP59503915A patent/JPS62501064A/ja active Pending

Non-Patent Citations (1)

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