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
  • B65D81/3876—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 insulating sleeves or jackets for cans, bottles, barrels, etc.
  • B65D81/3886—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 insulating sleeves or jackets for cans, bottles, barrels, etc. formed of different materials, e.g. laminated or foam filling between walls

Definitions

• the present invention relates to an insulating packaging for transporting foodstuffs in particular.
• thermos devices which, if they are not strictly speaking packaging, allow to store for several hours liquids or the like at a given temperature; these thermos are however very expensive and prove in any case unsuitable for the transport of foodstuffs themselves packaged.
• the present invention aims to remedy these disadvantages by proposing a heat-insulating packaging especially suitable for transporting food e ⁇ 'tional already packaged in boxes, t ..teilles or the like, characterized in that it comprises at least one central insulating sleeve around which a concentric and slightly tightening blind tube is arranged, of a height less than that of said sleeve, said packaging also comprising a cap mounted to slide on the part of the sleeve emerging from said blind tube, after its mounting around said sleeve.
• the packaging proposed by the present invention is very different from the packaging described in patent FR-1,388,978 in the name of the Company LINCR ⁇ STA.
• this latter patent describes a sealed package resistant to large and sudden temperature variations, characterized in that it comprises a tube made of a plastic material resistant to low temperatures, at least one of the ends of which is closed by a sliding plug provided with a seal, the other end being closed by a fixed or sliding plug; said plastic tube is housed in an outer cardboard tube with crimped bottoms, comprising a sealing layer of aluminum or cardboard impregnated with pitch, and an inner cardboard tube is also slipped inside said plastic tube.
• the outer and inner cardboard tubes protect said plastic tube from the risk of cracking.
• the heat-insulated packaging thus formed is cylindrical, that is to say that the central sleeve, the lower tube and the cap, themselves cylindrical, are generated respectively by a rectilinear generator displaced in parallel to itself along a plane directing curve.
• the director will be taken circular, oval or polygonal, but other forms are not excluded.
• the central insulating sleeve can be produced in many ways. For example, it can be composed of a cardboard tube inside which is added, or laminated, at least one layer of foam, asbestos or the like.
• the central cylindrical sleeve is formed by rolling, convolute or spiral, of at least one strip of cardboard and at least one strip of polyethylene foam.
• the foam and cardboard tube produced comprises at least two layers of cardboard laminated one on the other, then at least one layer of polyethylene foam, then at least two other layers of cardboard laminated l one on the other, the innermost cardboard layers not being glued to said layer of foam.
• the foam is held by pinching between the layers of cardboard.
• the foam and cardboard tube comprises at least two layers of cardboard laminated one on the other, then at least one layer of polyethylene foam, then at least two other layers of cardboard laminated one on top of the other, the innermost layers of cardboard being glued to said layer of foam.
• This bonding of the foam layer can also be done in two ways:
• the hot air blown through nozzles comes to cause at least superficial crosslinking of the strip of polyethylene foam on the one hand, and of the polyethylene layer cardboard / paper / polyethylene complex on the other hand; in this way, at the time of rolling which is normally carried out using an endless strip applying an adhesive pressure on the strips to be laminated, an autogenous welding takes place between the polyethylene foam and the cardboard strips. covered with the paper / polyethylene complex.
• the packaging shown in FIG. 1 first of all comprises a central heat-insulating cylindrical sleeve 1 enclosed in a blind cylindrical tube 2 acting as the bottom of the packaging.
• the tube 2 for example produced by rolling cardboard strips, is provided with a reinforced bottom 3 which is crimped at the lower end of said tube 2.
• the latter is, moreover, of a calculated internal diameter to allow it to be mounted by sliding around the sleeve 1; the tube 2 nevertheless slightly tightens the sleeve 1 and it is possible, moreover, to glue these two elements one against the other so as to secure them firmly.
• the length of the sleeve 1 is fairly markedly greater than that of the tube 2, so that the upper part 1a of the sleeve 1 can be capped by means of a cylindrical cap 4 which could be similar in all respects to the tube. lower 2.
• This cap 4 thus comprises a bottom 5, possibly reinforced and crimped at its upper end. Furthermore, the cap 4 is not glued against the sleeve 1 but slides frictionally around the latter, so that one can open and close the packaging quite easily.
• At least the bottom 5 of the cap 4 is provided with a wafer 6 of polyethylene foam, or of a similar insulating material, just engaging, at the closing the cap 4 on the upper part 1a, of the sleeve 1, in the neck of said sleeve 1; this wafer 6 has a small thickness which nevertheless suffices to isolate the packaging at the bottom 5.
• the same arrangement could of course be applied to the bottom 3 of the lower tube 2.
• the sleeve 1 is, for its part, manufactured by cutting of a composite cardboard and foam tube which it is advantageous to manufacture by rolling with contiguous turns of cardboard strips alternating with at least one polyethylene foam strip. Rolling can be convolute or spiral, the choice between these two techniques being made according to the mechanical characteristics required for packaging.
• a method of rolling tubes more particularly developed for the manufacture of heat-insulating composite tubes intended for the manufacture of packaging according to the present invention, consists, according to FIG. 2, in using at least one strip of crosslinked polyethylene foam 7 laminated to at least one strip 8 of a cardboard / paper / polyethylene complex which is common to use as a microbial barrier in certain food packaging.
• the composite tubes intended for the production of heat-insulating sleeves 1 are produced by spiraling with contiguous turns from seven superimposed strips 7 to 13 winding on a mandrel 14 in the following manner:
• these bands 8, 11 and -7 se. weld autogenously while cooling.
• hot air nozzles are arranged along the strip of foam 7. In this way, the contiguous turns formed by the latter on the mandrel 14 are welded also to each other by their slices.
• the heat-insulating tubes produced by the process of welding, by blowing with hot air, one or more strips of foam onto one or more strips of a complex, at least one face of which has a polyethylene film, can be used for any use other than that of sleeve 1 of a heat-insulating package as described with reference to FIG. 1.
• tubes of any cross-section obtainable by this latter process or by a similar rolling process, and having moreover, a priori any number of strips of foam and strips of cardboard find their use in the production of conduits, sheaths or heat-insulating pipes intended for the circulation of aerolic fluids.
• the heat-insulating packaging according to the invention is not expensive to manufacture, it is light and its cross section can be arbitrary. circular like that shown in the figures, oval, polygonal, without excluding any other shape better suited to the product to be preserved from heating.
• the case of a cylindrical packaging of circular section is well suitable for the transport of bottles to be kept fresh (services offered by caterers, etc.).

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Packages (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=9415115

Family Applications (1)

Country Status (4)

Cited By (1)

Family Cites Families (5)

• 1991
  • 1991-07-15 FR FR9108909A patent/FR2679208A1/fr active Granted
• 1992
  • 1992-07-15 CA CA 2113107 patent/CA2113107A1/fr not_active Abandoned
  • 1992-07-15 WO PCT/FR1992/000684 patent/WO1993001983A2/fr not_active Ceased
  • 1992-07-15 EP EP92916505A patent/EP0593673A1/fr not_active Withdrawn

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