DK171818B1

DK171818B1 - food Packaging

Info

Publication number: DK171818B1
Application number: DK39795A
Authority: DK
Inventors: Hans Joergen Blokman; Peter Togeskov
Original assignee: Nielsen Emballage
Priority date: 1995-04-07
Filing date: 1995-04-07
Publication date: 1997-06-23
Also published as: EP0817751B1; DK0817751T3; DE69601219T2; DE69601219D1; EP0817751A1; AU5332696A; ES2129263T3; DK39795A; WO1996031410A1

Description

DK 171818 B1 Nærværende opfindelse angår en fødevareemballage af den i indledningen til krav 1 angivne art.The present invention relates to a food packaging of the kind specified in the preamble of claim 1.

Fra US-patentskrift nr. 3.806.618 kendes en emballage af den indledningsvis nævnte art, hvor organerne til fri-5 givelse af dampe og gasser udgøres af en smeltelig forsegling, som smelter ved opvarmning under vand og tillader damp at undslippe fra emballagens indre. Ifølge dette skrift skulle den mekaniske forbindelse mellem de to emballageemner sikre mod indtrængning af vand. Denne konstruktion er for-10 holdsvis kompleks, med adskillige ombukkede kanter og flige i indbyrdes indgreb, og kan ikke anvendes i forbindelse med relativt fleksible emballageemner, hvor den mekaniske sikring mod vandindtrængning ikke vil være tilstrækkeligt sikker.U.S. Patent No. 3,806,618 discloses a package of the kind mentioned above, wherein the means for releasing vapors and gases are formed by a meltable seal which melts upon heating under water and permits steam to escape from the interior of the package. According to this document, the mechanical connection between the two packaging items was to ensure water penetration. This construction is relatively complex, with several folded edges and tabs mutually engaged, and cannot be used in connection with relatively flexible packaging blanks where the mechanical protection against water ingress will not be sufficiently secure.

Fra US-patentskrift nr. 4.834.554 kendes en emballage 15 af den indledningsvis nævnte art, hvor organerne til frigørelse af dampe og gasser udgøres af en normalt lukket ventil. Ventilen kan være forseglet ved hjælp af en tapestrimmel, som fjernes før opvarmning af fødevaren i emballagen. Skriftet omtaler alene mikrobølgeopvarmning.US Patent No. 4,834,554 discloses a package 15 of the kind mentioned above, wherein the means for releasing vapors and gases are a normally closed valve. The valve may be sealed by a tape strip which is removed before heating the food in the package. The script mentions microwave heating alone.

20 Det er på baggrund af denne kendte teknik hensigten med opfindelsen at tilvejebringe en fødevareemballage af den indledningsvis nævnte art, som også i forbindelse med forholdsvis fleksible emballageemnematerialer sikrer dels en frigivelse af dampe og gasser fra det indre af emballagen, 25 dels en undgåelse af indtrængning af væske fra omgivelserne til det indre af emballagen. Dette opnås ifølge opfindelsen ved de i den kendetegnende del af krav 1 angivne foranstaltninger .In view of this prior art, it is the object of the invention to provide a food packaging of the kind mentioned above which also ensures, in connection with relatively flexible packaging blank materials, a release of vapors and gases from the interior of the packaging, and partly an avoidance of penetration. of liquid from the surroundings to the interior of the package. This is achieved according to the invention by the measures specified in the characterizing part of claim 1.

Ventilåbningen, der fortrinsvis åbnes ved oprivning 30 af en første del af samlingssømmen, sikrer, at selv en lille forøgelse af trykket vil forårsage udslip af gas/damp fra emballagens indre. Opdriftslegemet sikrer, at ventilåbningen til enhver tid vil være beliggende over væskeoverfladen, ved opvarmning af emballagen med indhold i varmt eller kogen-35 de vand, således at væske ikke vil trænge ind i emballagens indre via ventilåbningen.The valve opening, which is preferably opened by tearing 30 of a first portion of the joint seam, ensures that even a slight increase in pressure will cause gas / vapor to escape from the interior of the package. The buoyancy body ensures that the valve opening will at all times be located above the liquid surface by heating the package with contents in hot or boiled water so that liquid will not enter the interior of the package via the valve opening.

2 DK 171818 B12 DK 171818 B1

Ved en passende udformning af samlingssømmen kan opdriftslegemet afgrænses mellem de to emballageemner. Herved opnås en særlig enkel fremstilling af emballagen, idet opdriftslegemet fremstilles samtidigt med samlingssømmen og 5 således ikke kræver nogen separat proces ved emballeringen af fødevaren.By an appropriate design of the joint seam, the buoyancy body can be delimited between the two packaging items. Hereby a particularly simple preparation of the packaging is obtained, the buoyancy body being produced simultaneously with the joint seam and thus requiring no separate process in the packaging of the food.

Ved de i krav 4 angivne foranstaltninger opnås, at opdriftslegemet oppustes af de ved opvarmningen frembragte dampe, som, før de undslipper, skal passere opdriftslegemet.By the measures set out in claim 4, it is achieved that the buoyancy body is inflated by the vapors produced by the heating, which, before escaping, must pass the buoyancy body.

10 Ved den i krav 5 angivne foranstaltning sikres det, at den indledningsvise oprivning af samlingssømmen, for åbning af ventilåbningen, ikke utilsigtet bliver for stor, idet åbningen let tilvejebringes ved en lille kraft og videre oprivning kræver en noget større kraftpåvirkning.By the measure of claim 5, it is ensured that the initial tearing of the joint seam, for opening the valve opening, does not inadvertently become too large, since the opening is easily provided by a small force and further tearing requires a somewhat greater force influence.

15 Opfindelsen forklares i det følgende nærmere ved hjælp af et udførelseseksempel under henvisning til tegningen , hvor:The invention will now be explained in more detail by way of example with reference to the accompanying drawings, in which:

Fig. 1 viser en foretrukken udførelsesform for emballagen ifølge opfindelsen.FIG. 1 shows a preferred embodiment of the packaging according to the invention.

20 Den i fig. 1 viste fødevareemballage omfatter to emballageemner i form af i det væsentlige ens folieark, som langs en oprivelig samlingssøm 1, der forløber i det væsentlige langs periferien af de to emneark, er samlede ved varme-svejsning til lufttæt afgrænsning af et indre volumen 2 til 25 optagelse af den emballerede fødevare. Samlingssømmen 1 er på sædvanlig vis udformet som en oprivelig samlingssøm, idet sammensvejsningen af de to emneark er foretaget på i og for sig kendt vis. I den viste udførelsesform er organerne til frigivelse af dampe og gasser udformet som en ventilåb-30 ning 3, hvor samlingssømmen er udformet som en særligt svækket del af denne med gribeflige til let at åbne denne ventilåbning 3. Til at undgå indtrængning af væske fra omgivelserne er der langs den ene sidekant af emballagen udformet et opdriftslegeme 4 i tilstødning til ventilåbningen 3.The embodiment of FIG. 1, the food packaging shown in Fig. 1 comprises two packaging blanks in the form of substantially identical foil sheets which, along a riveted joint seam 1 extending substantially along the periphery of the two blanks, are assembled by heat welding to air tightly define an internal volume 2 to 25 uptake of the packaged food. The joint seam 1 is in the usual way formed as an upright joint seam, the welding of the two work sheets being made in a manner known per se. In the illustrated embodiment, the means for releasing vapors and gases are formed as a valve opening 3, wherein the joint seam is formed as a particularly weakened portion thereof with gripping tabs to easily open this valve opening 3. To avoid penetration of liquid from the environment a buoyant body 4 is formed along one side edge of the package adjacent to the valve opening 3.

35 Opdriftslegemet 4 er i den viste udførelsesform udformet som et kanalformet volumen, som forløber langs en sidekant DK 171818 B1 3 af emballageemnerne, som ved sin ene ende står i forbindelse med vent il åbningen 3 og ved en position 5, som er beliggende i afstand fra denne, står i forbindelse med emballagens indre volumen 2.In the illustrated embodiment, the buoyant body 4 is formed as a channel-shaped volume which extends along a side edge DK 171818 B1 3 of the packaging items, which at one end communicates with the vent 1 in the opening 3 and at a distance 5 located from this, relates to the inner volume of the packaging 2.

5 Ved anvendelse af fødevareemballagen ifølge opfindel sen emballeres fødevaren på sædvanlig vis i emballageemneme, idet disse samles omkring fødevaren langs samlingssømmen 1. Fødevaren kan herefter om nødvendigt autoklaveres, idet der ved autoklaveringen sikres et udvendigt tryk som i det mind-10 ste er lige så stort som det indvendige tryk i emballagens indre volumen 2, hvorved man undgår sprængning af emballagen under autoklaveringen. Herefter er fødevaren, som er emballeret i denne fødevareemballage, egnet til langtidsopbevaring af fødevaren og ved anvendelse af fødevaren opvarmes denne 15 på følgende vis: Fødevareemballagen åbnes ved ventilåbningen 3 ved at rive gribefligene fra hinanden, idet man undlader at åbne samlingssømmen ud over selve ventilåbningen 3. Denne begrænsede åbning af samlingssømmen understøttes af den efter ventilåbningen 3 følgende forstærkede del af samlings-20 sømmen. Fødevareemballagen med den i denne indeholdte fødevare anbringes derefter i varmt eller kogende vand for opvarmning henholdsvis kogning af fødevaren i emballagen. Med udformningen af fødevareemballagen som angivet vil opdriftslegemet 4 sikre, at ventilåbningen 3 vender opad og således 25 befinder sig over væskeoverfladen i det varme eller kogende vand, således at dette ikke trænger ind i fødevareemballagen via ventilåbningen 3. Under opvarmningen frigøres dampe fra fødevaren i emballagen, hvorved trykket i denne stiger en smule, således at ventilåbningen 3 frigiver dampe og/eller 30 gasser fra emballagen til omgivelserne. Med en passende udformning af ventilåbningen 3 vil der være en tendens til, at et overtryk i emballagen vil oppuste opdriftslegemet 4, hvorved dettes funktion yderligere understøttes.5 Using the food packaging according to the invention, the food is usually packaged in the packaging blanks, which are assembled around the food along the stitching seam 1. The food can then be autoclaved, whereby an external pressure at least equal to the autoclaving is ensured. large as the internal pressure of the inner volume 2 of the packaging, thereby avoiding bursting of the packaging during autoclaving. Thereafter, the food packaged in this food packaging is suitable for long-term storage of the food and, when using the food, it is heated as follows: The food packaging is opened at the valve opening 3 by tearing the gripping tabs apart, failing to open the joint seam beyond the valve opening itself. 3. This limited opening of the joint seam is supported by the reinforced portion of the joint 20 following the valve opening 3. The food packaging with the food contained in it is then placed in hot or boiling water to heat or boil the food in the packaging, respectively. With the design of the food packaging as indicated, the buoyancy body 4 will ensure that the valve opening 3 faces upwards and thus 25 is above the liquid surface in the hot or boiling water, so that this does not enter the food packaging via the valve opening 3. During the heating, vapors are released from the food in the packaging. whereby the pressure therein increases slightly so that the valve opening 3 releases vapors and / or 30 gases from the packaging to the surroundings. With a suitable design of the valve opening 3, there will be a tendency for an overpressure in the packaging to inflate the buoyancy body 4, thereby further supporting its function.

Efter opvarmning/kogning af fødevaren i emballagen 35 tages fødevareemballagen med indhold ud af det kogende/varme vand og den oprivelige samlingssøm 1 oprives fuldstændigt 4 DK 171818 B1 for udtagning af fødevaren af emballagen.After heating / boiling the food in the packaging 35, the food packaging containing the contents of the boiling / hot water is removed and the tear-off stitch 1 is completely listed 4 for removing the food from the packaging.

Selv om fødevareemballagen i det foregående er beskrevet ved hjælp af en foretrukken udførelsesform vil det være klart at eksempelvis opdriftslegemet 4 kan være udformet 5 som et separat volumen uden forbindelse med fødevareemballagens indre volumen 2 henholdsvis ventilåbningen 3, men blot i tilstødning til denne ventilåbning 3, således at opdriftslegemet 4 sikrer, at ventilåbningen 3 er beliggende over væskeoverfladen af det varme eller kogende vand, som 10 anvendes til opvarmning af fødevaren.Although the food packaging is described above by a preferred embodiment, it will be clear that, for example, the buoyant body 4 may be formed 5 as a separate volume without connection to the inner volume 2 of the food packaging 2 or the valve opening 3, but merely adjacent to this valve opening 3, so that the buoyancy body 4 ensures that the valve opening 3 is located above the liquid surface of the hot or boiling water which 10 is used to heat the food.

Claims

A food packaging comprising two packaging items which along an upright joint seam (1) extending substantially along the periphery of the two packaging items, are combined, for example by heat welding, for airtight delimitation of an inner volume (2) the packaged food, wherein the packaging is primarily intended for boiling or heating the food in the packaging, by placing it in hot or boiling water, and wherein the packaging, 10, in order to avoid bursting by the overpressure of vapors provided in the heating; / or gases in the package, are provided with a valve opening (3) which is opened before heating the food in the package, for releasing vapors and gases from the interior of the package 15 to the surroundings and means for preventing the penetration of liquid from the surroundings to the interior of the package, via the valve opening (3) for the release of vapor, characterized in that the means for avoiding entry Liquid from the environment comprises a buoyancy body (4) located adjacent to the valve opening (3).

Food packaging according to claim 1, characterized in that the valve opening (3) is opened by tearing a first part (3) of the joint seam. 25

Food packaging according to claim 1 or 2, characterized in that the buoyancy body (4) is constituted by a volume which, by a suitable design of the joint seam (1), is delimited between the two packaging items. 30

Food packaging according to any one of the preceding claims, characterized in that the buoyant body (4) consists of a channel-shaped volume extending along a side edge of the packaging articles, which at one end communicates with the valve opening (3) and at a position (5), spaced apart from it, communicates with the inner volume (2) of the packaging.

Food packaging according to any one of the preceding claims, characterized in that the first part of the joint seam to be opened for opening the valve opening (3) is constituted by a particularly weakened part of the joint seam, which is followed by a particular tear in the direction of tearing. reinforced part of the seam.