EP0817751B1 - Food package - Google Patents

Food package Download PDF

Info

Publication number
EP0817751B1
EP0817751B1 EP96909987A EP96909987A EP0817751B1 EP 0817751 B1 EP0817751 B1 EP 0817751B1 EP 96909987 A EP96909987 A EP 96909987A EP 96909987 A EP96909987 A EP 96909987A EP 0817751 B1 EP0817751 B1 EP 0817751B1
Authority
EP
European Patent Office
Prior art keywords
package
valve aperture
food
joining seam
internal volume
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.)
Expired - Lifetime
Application number
EP96909987A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0817751A1 (en
Inventor
Hans Jorgen Blokmann
Peter Togeskov
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.)
Amcor Flexibles Otto Nielsen AS
Original Assignee
Danisco Flexible Otto Nielsen AS
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Danisco Flexible Otto Nielsen AS filed Critical Danisco Flexible Otto Nielsen AS
Publication of EP0817751A1 publication Critical patent/EP0817751A1/en
Application granted granted Critical
Publication of EP0817751B1 publication Critical patent/EP0817751B1/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
    • 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
    • B65D33/01—Ventilation or drainage of 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
    • 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
    • B65D81/34—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 for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3415—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 for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated in hot water, e.g. boil pouches

Definitions

  • the present invention relates to a food package of the kind set forth in the preamble of claim 1.
  • US patent publication No. 3,806,618 discloses a package of the kind referred to initially, in which the means for liberating vapours and gases are constituted by a meltable seal, melting when heated under water and allowing vapour to escape from the interior of the package.
  • the mechanical connection between the two packaging elements should ensure that water does not penetrate into the package.
  • This construction is relatively complicated, having several turned-in edges and flaps in mutual engagement, and it cannot be used in connection with relatively flexible packaging elements, with which the mechanical protection against water penetrating into the package will not be sufficiently reliable.
  • US patent publication No. 4,834,554 discloses a package of the kind referred to initially, in which the means for liberating vapours and gases are constituted by a normally closed valve.
  • the valve can be sealed by means of a tape strip, to be removed prior to heating of the food product in the package.
  • This publication refers solely to microwave heating. If this package is used for heating in hot or boiling water, the normally closed valve will require a certain excess pressure in the package before it opens, causing the package to be inflated and to float at a relatively high level in the surface of the water. This reduces substantially the contact surface for the transfer of heat from the water to the package with its contents.
  • the valve aperture preferably being opened by tearing-open a first part of the joining seam, ensures that even a small increase in the pressure will cause gas/vapour from the interior of the package to escape.
  • the buoyancy member ensures that the valve aperture will at all times be situated at a level above the liquid surface when the package with its contents is heated in hot or boiling water, so that liquid will not penetrate into the interior of the package via the valve aperture.
  • the joining seam By arranging the joining seam in a suitable manner it is possible to delimit the buoyancy member between the two packaging elements. This makes it possible to manufacture the package in a particularly simple manner, because the buoyancy member is produced at the same time as the joining seam, thus not requiring any separate process during the packaging of the food product.
  • the result of the measures set forth in the claim 3 is that the buoyancy member is inflated by the vapours produced by the heating, as these vapours have to pass through the buoyance member before escaping.
  • the measure set forth in claim 4 ensures that the preliminary tearing-open of the joining seam with a view to opening the valve aperture does not inadvertently become too great, because the opening is easily provided by means of a small force, and any further tearing-open requires a somewhat greater force to be exerted.
  • the food package shown in figure 1 comprises two packaging elements in the form of substantially identical foil sheets, assembled by hot welding along a tearable seam 1 extending substantially along the periphery of the two sheet elements so as to delimit in an air-tight manner an internal volume 2 for receiving the packaged food product.
  • the seam 1 is in a conventional manner made in the form of a tearable joining seam, the two sheet elements having been welded to each other in a manner known per se.
  • the means for liberating vapours and gases are constituted by a valve aperture 3, at which the joining seam is made in the form of a specially weakened part of the latter comprising gripping flaps so as to make it easy to open this valve aperture 3.
  • a buoyancy member 4 is arranged along one side edge of the package adjacent the valve aperture 3.
  • the buoyancy member 4 is in the form of a channel-shaped space extending along a side edge of the packaging elements and at one end communicating with the valve aperture 3, and at a location 5 at a distance from the latter communicating with the internal volume 2 of the package.
  • the food product is packaged in a conventional manner in the packaging elements, the latter being joined around the food product along the joining seam 1.
  • the food product can be treated in an autoclave, and if so, ensuring an external pressure at least equal to the internal pressure in the internal volume 2 of the package will avoid the package bursting during this process.
  • the food product having been packaged in this food package is suited for long-term storage of the food product, and when the latter is to be used, it is heated in the following manner:
  • the food package is opened at the valve aperture 3 by tearing the gripping flaps away from each other without opening the joining seam beyond the valve aperture 3 itself.
  • the strengthened part of the joining seam beyond the valve aperture 3 contributes to this limited opening of the joining seam.
  • the food package containing the food product is placed in hot or boiling water in order to heat or cook respectively the food product in the package.
  • the buoyancy member 4 will ensure that the valve aperture 3 faces upwardly and thus will be above the surface of the hot or boiling water, so that the latter does not penetrate into the food package via the valve aperture 3.
  • vapours are liberated from the food product in the package, so that the pressure in the latter increases slightly, causing vapours and/or gases from the package to escape to the surroundings through the valve aperture 3.
  • pressure above atmospheric in the package will tend to inflate the buoyancy member 4, thus further enhancing the function of the latter.
  • the food package with its contents is removed from the boiling/hot water, and the tearable seam 1 is torn open completely to enable the food product to be removed from the package.
  • the buoyancy member 4 may be in the form of a separate volume not communicating with the internal volume 2 of the food package and the valve aperture 3 respectively, but solely adjacent to this valve aperture 3, so that the buoyancy member 4 ensures that the valve aperture 3 is situated above the surface of the hot or boiling water being used for heating the food product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)
  • Packages (AREA)
EP96909987A 1995-04-07 1996-04-03 Food package Expired - Lifetime EP0817751B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK39795 1995-04-07
DK39795A DK171818B1 (da) 1995-04-07 1995-04-07 Fødevareemballage
PCT/DK1996/000164 WO1996031410A1 (en) 1995-04-07 1996-04-03 Food package

Publications (2)

Publication Number Publication Date
EP0817751A1 EP0817751A1 (en) 1998-01-14
EP0817751B1 true EP0817751B1 (en) 1998-12-23

Family

ID=8093067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96909987A Expired - Lifetime EP0817751B1 (en) 1995-04-07 1996-04-03 Food package

Country Status (6)

Country Link
EP (1) EP0817751B1 (da)
AU (1) AU5332696A (da)
DE (1) DE69601219T2 (da)
DK (2) DK171818B1 (da)
ES (1) ES2129263T3 (da)
WO (1) WO1996031410A1 (da)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0795482A3 (en) * 1996-03-12 1997-11-12 Fuji Techno Co., Ltd. Food product packaging bag
WO1999032373A1 (de) 1997-12-18 1999-07-01 Karl Keller Lebensmittelverpackung und garverfahren für lebensmittel
US20090181132A1 (en) * 2008-01-11 2009-07-16 Conopco, Inc., D/B/A Unilever Package
JP2015199497A (ja) * 2014-04-04 2015-11-12 凸版印刷株式会社 包装体
CN115924322B (zh) * 2022-12-20 2025-07-11 泰安市海之润食品有限公司 一种大块固体熟食类软罐头的蒸煮袋

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3027261A (en) * 1957-02-21 1962-03-27 Jake G Samara Packaging and reconstituting food products
US3806618A (en) * 1971-02-21 1974-04-23 Robalex Inc Method of heating a package of food
US4834554A (en) * 1987-11-16 1989-05-30 J. C. Brock Corp. Plastic bag with integral venting structure
GB2251420A (en) * 1990-12-12 1992-07-08 Courtaulds Packaging Ltd Package in which foodstuff may be heated and/or cooked
GB9115420D0 (en) * 1991-07-17 1991-09-04 Unilever Plc Infusion bag

Also Published As

Publication number Publication date
WO1996031410A1 (en) 1996-10-10
DK0817751T3 (da) 1999-08-23
ES2129263T3 (es) 1999-06-01
DK39795A (da) 1996-10-08
AU5332696A (en) 1996-10-23
DK171818B1 (da) 1997-06-23
DE69601219D1 (de) 1999-02-04
EP0817751A1 (en) 1998-01-14
DE69601219T2 (de) 1999-08-12

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