EP1353860B1 - Erwärmbares lebensmittelpaket mit entlüftungsmittel - Google Patents

Erwärmbares lebensmittelpaket mit entlüftungsmittel Download PDF

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Publication number
EP1353860B1
EP1353860B1 EP01995818A EP01995818A EP1353860B1 EP 1353860 B1 EP1353860 B1 EP 1353860B1 EP 01995818 A EP01995818 A EP 01995818A EP 01995818 A EP01995818 A EP 01995818A EP 1353860 B1 EP1353860 B1 EP 1353860B1
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EP
European Patent Office
Prior art keywords
film
container
films
bottom film
perforations
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Expired - Lifetime
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EP01995818A
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English (en)
French (fr)
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EP1353860A1 (de
Inventor
Robert Jan Colenbrander
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Individual
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Individual
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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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • 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
    • B65D81/3438—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 by steaming
    • 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
    • B65D81/3446—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 by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • 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
    • B65D2205/00—Venting means

Definitions

  • the invention concerns a device for the packaging and preparation of food.
  • a device for the packaging and preparation of food.
  • Such a device is known from EP 0971849.
  • This known device particularly suitable for use in a microwave oven, comprises a plastic container, closed at the topside by means of a film sealed onto the container.
  • a part is made which functions as a valve.
  • a vapour pressure will develop in the container, by means of which the pressure within the container will rise to above atmospheric pressure. Therefore the temperature in the container will easily rise to above 100 °C, by which food can be prepared in a particularly fast manner, while all the wanted food properties are retained.
  • the valve is adjusted thereby such that vapour can escape through the valve at a desired pressure so that too high pressures and temperatures will be prevented.
  • This known device has the advantage that food can be packaged and transported in it easily, whereby the food stays fresh, is protected against influences from the outside and moreover it is prevented that moisture can leak away from the container. Moreover, the food can be prepared in it fast, with retention of, for example, aroma, texture, vitamins and such, while too high pressures are prevented.
  • the disadvantage of this device is that a relatively expensive valve has to be applied.
  • valve can become clogged up with food, as a result of which no vapour or at any rate only a limited amount of vapour can escape.
  • a further disadvantage is that the device has to be opened by the user rather quickly after heating since otherwise the device will be compressed together because of the pressure differences. When opening the container the risk exists that the user thereby gets into contact with the hot vapour which is still present.
  • EP 0 661 219 discloses a layered film for closing food containers, which layered film comprises two layers of film bonded to each other over a large part of the surface which, during use, closes the take out opening of the container, prior to closing the container. Venting channels are provided between said layers of film, whereby venting opening are provided at the edge of the film in the form of rip valves.
  • EP 0 967 160 discloses a similar layered film of at least two layers of film bonded to each other over most of the surface extending over the take out opening of a container.
  • This sticker should be removed by the user before heating. Disadvantage of it is that no quick pressure build-up takes place in the device and the user firstly has to manipulate the device before use.
  • a device according to the invention offers the advantage that the layers of film can be fastened in an easy manner, whereby during use a desired overpressure in the packaging can be obtained automatically and can be maintained, for example a pressure between 1.0 and 4.0 bar and preferably between 1.3 and 1.9 bar, as a result of the means for allowing the mentioned vapour to escape.
  • Vapour will only be able to escape when a certain, increased vapour pressure has been obtained. Because no valves are necessary, the above mentioned disadvantages are prevented.
  • the films can easily be fed in from a roll and be cut to size, by which also various sizes of containers can be applied easily. Moreover, in this way always a suitable combination of films and containers can be chosen, for example depending on the food to be packaged and prepared. Preparation should be understood in this context as at least preparing for consumption, including heating.
  • a device according to the invention is characterised by the measures according to claim 3.
  • the advantage is obtained that pressure can build up relatively fast between the bottom and the mentioned gastight and liquid tight film, whereby moreover also a fast build up of pressure to the desired level in the container is achieved.
  • multiple perforated films are envisaged, whereby in the direction away from the bottom layer the film or each film located above it has perforations with a total permeability surface which is smaller than that of the bottom film.
  • a device according to the invention is characterised by the measures according to claim 5.
  • Such a device vapour, entrapped between the two films can escape because the second film comes loose, at any rate partly, when the pressure between the films surpasses a certain increased preselected pressure.
  • Such a device can be manufactured particularly easy, while an automatic action is achieved immediately, whereby allowable overpressures can be set easily by the choice of the mentioned connections.
  • the film or each second film is implemented such that it tears when a certain pressure is surpassed to allow the release of the overpressure.
  • the perforations in the bottom film are relatively small, for example round with a diameter between 50 and 5000 ⁇ m, preferably between 100 and 750 ⁇ m or openings with a different shape but with a comparable surface.
  • a dimension between 200 and 500 ⁇ m is particularly suitable.
  • a favourable flow-through resistance for vapour is obtained with it, while such perforations can be manufactured relatively accurate.
  • the bottom film preferably is manufactured from a thermic stable laminate, particularly a laminate manufactured from polyester and polypropylene.
  • the bottom film or each film placed above the bottom film thereby preferably is a heat-sealable plastic film, particularly polyester, which can be peeled off.
  • film materials consisting of one or more layers could be chosen, depending on the application, which choice will be immediately obvious for a skilled worker.
  • the invention further concerns a method for the manufacture of a device for the packaging and preparation of food, characterised by the measures according to claim 14.
  • Such a method offers the advantage that a packaging can be manufactured in a particularly quick and easy manner in which food can be packaged, transported and prepared.
  • various films put on top of each other can be fed in, for example as a laminate, prior to the joining thereof with the container, while the films furthermore can be fed in separately from each other.
  • the films for example, can be fed in from a roll and directly be cut to size prior to or during the positioning. In this way a particularly great freedom of design can be obtained, whereby packaging of various sizes can be manufactured in an easy way.
  • the invention further concerns a method for the preparation of food, characterised by the measures according to claim 18.
  • the advantage is achieved that packaged food can be put directly into an oven, particularly a microwave oven or steam oven, in which the food can be heated and prepared quickly, without the quality of it being influenced negatively.
  • the quality of the food is retained in a particularly favourable manner. Particularly, it is prevented that the packaged food, for example, is drying out or is losing texture, colour, aromas or such, or at any rate that these qualities are influenced in an undesired way. Moreover, vitamins are retained in this manner.
  • FIG. 1 schematically in exploded perspective view, a packaging device 1 according to the invention.
  • This packaging device 1 comprises a dish-shaped container 4, for example manufactured from heat-sealable plastic, known from practice and suitable for use in a magnetron or steam oven.
  • This dish-shaped container 4 is provided at the topside with a take out opening 2, surrounded by a flat edge 6 which extends outwards.
  • This packaging device 1 further comprises a first bottom film 8 and a second, top film 10. Bottom should be understood in this context to be closest to the take out opening 2, top film as the film or each film at the side which is turned away from the take out opening 2 of the bottom film 8.
  • two films 8, 10 are provided, with a surface size approximately matching the topside of the container 4 as is determined by the lengthwise edge 6.
  • the films 8, 10 are manufactured from a material that can be fastened by means of heat sealing on the lengthwise edge 6.
  • the bottom film thereby preferably is manufactured from a thermic stable heat-sealable laminate, the top film 10 of a heat-sealable plastic, preferably a heat-sealable plastic which can be peeled off.
  • Figure 5 shows films 8, 10, above the lengthwise edge 6.
  • the bottom film 8 thereby consists of, for example a laminate manufactured from a first layer 14 of polypropylene with a thickness of for example between the 60 and the 120 ⁇ m and particularly 90 ⁇ m and a second layer 12 of polyester on top of it with, for example, a thickness between the 10 and 15 ⁇ m, particularly 12 ⁇ m.
  • the top film 10 thereby is manufactured, for example, from polyester with a thickness of approximately 25 ⁇ m, preferably 20 ⁇ m heat-sealable polyester which can be peeled off.
  • polyester with a thickness of approximately 25 ⁇ m, preferably 20 ⁇ m heat-sealable polyester which can be peeled off.
  • the materials and dimensions mentioned here are only presented as examples and should not be explained as being limiting as regards the scope of the invention.
  • the bottom film 8 is provided with a perforation pattern 16, in the embodiment shown are a number of perforations 18 with mainly circularly shaped cross sections.
  • This perforations have, for example, a diameter between 50 ⁇ m and 5000 ⁇ m, particularly between 200 and 500 ⁇ m, so that water droplets or at any rate vapour can pass through it when sufficient pressure exists within the container 4, as will still be described in more detail.
  • first sealing means 22 are schematically shown here by the hatching. It will be clear that any desired, suitable sealing method can be applied, for fastening of the first, bottom film 8 onto the lengthwise edge 6, or at any rate onto the container 4.
  • the second film 10 is fastened onto the bottom film 8 with the aid of second sealing means 24, in the embodiment shown directly above the first sealing means 22 and the lengthwise edge 6.
  • the first sealing means 22 and second sealing means 24 thereby are chosen such that the bottom film 8 is joined relatively tight with the lengthwise edge 6.
  • This connection, formed by the first sealing means 22, is stronger than the connection between the bottom film 8 and the second film 10, formed by the second sealing means 24.
  • the purpose for this will be elaborated on later in this document. It will be clear that in the drawing the thicknesses of the films 8, 10, the first and second sealing means 22, 24 and the dish-shaped container 4 are not shown in relation.
  • the packaging device 1 When food 20 is packaged in the manner shown in figure 2 in the packaging device 1 then it can be transported and stored in the device, while the packaging 1 with the food 20 can be placed in the closed condition in a microwave (magnetron) or steam oven or such. When the respective oven thereafter is switched on, the food 20 can be prepared with a method according to the invention, explained in more detail on basis of figure 3A - C. Preparation should be understood in this context as at least comprising the preparation for consumption, included heating up.
  • FIG 3A schematically shows the packaging 1 according to the invention in a relatively cold condition.
  • a relatively low temperature T 0 for example room temperature or lower
  • a relatively low pressure P 0 for example comparable to the atmospheric pressure P A outside the container 4.
  • a protective gas can be contained in the inside space of the container 4 to obtain a modified atmosphere. In occurring cases, the food 20 is still better protected by it.
  • the food 20 is heated, by which moisture present in the food 20 and possibly added moisture is heated and will evaporate. Because of it, the pressure in the container 4 will rise to a relatively high pressure P 1 , whereby the temperature will also increase to a relatively high temperature T 1 . As a consequence of the increase of pressure, vapour will be forced through the openings 18, as shown by the arrows 25. This vapour will flow between the bottom film 8 and the top film 10, but will be prevented from escaping by the second sealing means 24. Thus, the pressure will rise between the bottom film 8 and the top film 10 to a relatively high pressure P 2 , whereby the temperature will also increase somewhat to a temperature T 2 .
  • the food 20 will be heated relatively quickly, whereby the quality of the food will be retained, particularly does not dry out, being unwanted, and / or the texture, colour or taste changes, while moreover, for example, vitamins will be retained in a particularly suitable manner. Because the second sealing automatically, or at any rate partly is broken when the pressure P 2 between the layers of films 8, 10 increases, automatically a desired pressure is set, depending on for example, the amount of heating, the amount of vapour which develops, the inside volume of the container 4 under the bottom film 8 and the total permeability surface of the permeability openings 18 in the bottom film 8.
  • FIG 4 an alternative embodiment of a device 1 according to the invention is shown, whereby both the bottom film 8 and the top film 10 are fastened with aid of respectively the first sealing means 22 and second sealing means 24 directly onto the lengthwise edge 6.
  • the advantage is obtained thereby that a particularly good connection is obtained between the second film 10 and the rest of the container 4, also when the top layer of the bottom film 8 is not, or at any rate badly heat-sealable or else does not allow a relatively weak connection in a suitable manner.
  • the top film 10 and the bottom film 8 are fastened directly onto each other, whereby the bottom film 8 is directly fastened onto the lengthwise edge 6.
  • a weakening line 26 is manufactured in the top film 10, which initially is closed. When this packaging 4 with food 20 is put in an oven and is heated, vapour will flow between the first and second film 8, 10, in the manner as shown in figures 3 A and B, the volume in between the films will increase and a pressure P 2 will develop. The tear line 26 will tear open when the limit pressure P 2 is surpassed and vapour can escape to the surroundings.
  • the bottom film 8 and the top film 10 can stay connected to each other and when opening the packaging device 1, can be torn off and discarded together.
  • a mainly rectangular container 4 is applied.
  • a container with, for example, a round or oval shape with which a more steady heating can be obtained while moreover a more steady distribution of heating and vapour pressure can develop.
  • a dish-shaped container is for example manufactured from plastic or plastic laminated cardboard, manufactured by means of, for example vacuum forming, injection moulding or such techniques.
  • a dish-shaped container is applied, manufactured from a material that can be sealed with in itself known sealing methods, particularly heat sealing methods. Such materials which are applicable for it therefore are well-known from practice.
  • the perforations 16, 18 can also be put on in another way, for example in the form of a regular or irregular matrix of openings 18.
  • the number and size of the perforations can be chosen easily, depending on the products to be heated, surfaces, contents of the container and such. Such a choice will be apparent immediately for the skilled worker.
  • More than two films can also be applied, for example two perforated films on top of each other, possibly covered by a closed film, whereby preferably the perforations of the in-between film have a total permeability surface which is smaller than that of the perforations of the bottom film, or at any rate have a flow resistance which is higher than that of the bottom film.
  • pressure can be built up in a stepwise manner.
  • a container can be applied which is divided into various compartments, whereby at least the bottom film is also fastened onto a separation wall of the various compartments.
  • the perforations in the bottom film can be different thereby for each compartment, for obtaining different pressures and / or temperatures in those compartments.
  • Any suitable material is applicable within a packaging device according to the invention.
  • One or more of the films can also be fastened onto the container in another manner instead of the heat sealing technique, for example under application of a suitable gluing technique, welding technique or such.
  • the top film can also be implemented in such a way that it rips open when a certain or a desired maximal pressure is surpassed, in order to allow the escape of vapour.
  • These perforations in the above placed film are, for example, round and having a diameter between 10 and 1000 ⁇ m, preferably between 20 and 100 ⁇ m and particularly having a diameter between 40 and 60 ⁇ m. These perforations are made with a frequency of, for example, 10 to 1000 perforations per m 2 .
  • the object of this alternative embodiment is to increase the storage life of the food products packaged in the device, particularly that of plant material.
  • Such an assembly of perforated layers of film allow to adjust the O 2 and CO 2 levels during transport and storage.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Packages (AREA)
  • Package Specialized In Special Use (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Claims (19)

  1. Vorrichtung (1) für das Verpacken und das Zubereiten von Lebensmitteln (20), die mit einem schalenförmigen Behälter (4) ausgestattet ist, der an der Oberseite mit einer Entnahmeöffnung versehen ist, welche durch mindestens zwei Folienlagen verschlossen ist, welche übereinander angeordnet sind, wobei mindestens die untere Folie (8) mit Perforationen (18) versehen ist, wodurch Mittel bereitgestellt werden, dass während des Gebrauchs Dampf zwischen der unteren Folie (8) und einer darüber angeordneten Folie (10) entweicht, dadurch gekennzeichnet, dass die untere Folie (8) und die über ihr angeordnete Folie (10) miteinander und/oder auf dem Behälter (4) durch Abdichtungen (22, 24) ausschließlich an dem umlaufenden Rand (6) der Entnahmeöffnung (2) des Behälters (4) verbunden sind, wobei notwendigerweise die mindestens zwei Folienlagen (8, 10) über den gesamten Oberflächenbereich der Entnahmeöffnung (2) des Behälters (4) derart voneinander abgetrennt bleiben, dass dann, wenn während des Gebrauchs der Druck zwischen den beiden Folien (8, 10) einen oberen Grenzwert überschreitet, mindestens ein Teil der Abdichtung, welche die obere Folie mit dem Rand verbindet, durchbrochen wird und/oder die obere Folie (10) zerrissen wird, damit der Dampf zwischen den Folien (8, 10) entweicht.
  2. Vorrichtung nach Anspruch 1, wobei die Folien (8, 10), die aus mindestens zwei Lagen bestehen, auf einer Längskante des Behälters (4) abgedichtet sind.
  3. Vorrichtung nach Anspruch 1 oder 2, wobei mindestens eine Folie gasdicht und flüssigkeitsdicht ist.
  4. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei mindestens eine Folie (10), die über der unteren Folie (8) angeordnet ist, Perforationen (18) mit einer Gesamtdurchlässigkeitsfläche aufweist, die kleiner ist als die Gesamtdurchlässigkeitsfläche der Perforationen in der unteren Folie (8).
  5. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei die untere Folie (8) mit dem Behälter (4) und die Folie oder eine zweite Folie (10) mit der unteren Folie (8) vorzugsweise entlang deren Längskante verbunden ist, wobei die Verbindung zwischen der unteren Folie (8) und dem Behälter (4) fester ist als die Verbindung zwischen der unteren Folie (8) und der zweiten Folie (10), um die Mittel auszubilden, dass ein Entweichen des erwähnten Dampfes ermöglicht wird, und die eine sowie die andere derart sind, dass während eines Druckaufbaus im Behälter (4) Gas durch die Perforationen (18) in der unteren Folie (8) und zwischen die untere Folie (8) und die zweite Folie (10) strömen kann und die Verbindung zwischen der zweiten Folie (10) und der unteren Folie (8) wenigstens teilweise abreißen wird, wobei die Verbindung zwischen dem Behälter (4) und der unteren Folie (8) erhalten bleibt.
  6. Vorrichtung nach einem der Ansprüche 1 - 5, wobei die untere Folie (8) mit dem Behälter (4) und die Folie oder eine zweite Folie (10) mit der unteren Folie (8) vorzugsweise entlang deren Längskante verbunden ist, wobei die Verbindung zwischen der unteren Folie (8) und dem Behälter (4), die Verbindung zwischen der unteren Folie (8) und der zweiten Folie (10) und die Folienlagen derart gewählt werden, dass Gas während eines Druckaufbaus im Behälter (4) durch die Perforationen (18) in der unteren Folie (8) zwischen die untere Folie (8) und die zweite Folie (10) strömen kann und die Verbindung zwischen der zweiten Folie (10) und der unteren Folie (8) wenigstens teilweise abreißt und/oder eine Öffnung in der zweiten Folie (10) entsteht, um die Mittel auszubilden, dass ein Entweichen des erwähnten Dampfes für ein Ablassen des Druckes zwischen den Folien ermöglicht wird, wobei die Verbindung zwischen dem Behälter (4) und der unteren Folie (8) intakt bleibt.
  7. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei die Perforationen (18) in der unteren Folie (8) einen Durchmesser zwischen 50 µm und 5000 µm, vorzugsweise zwischen 100 und 750 µm, insbesondere zwischen 200 und 500 µm aufweisen.
  8. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei die untere Folie (8) aus einem thermisch stabilen Laminat, insbesondere einem Laminat aus Polyester und Polypropylen, aufgebaut ist.
  9. Vorrichtung nach einem der vorhergehenden Ansprüche, wobei die Folie oder eine beliebige Folie (8), die am Boden angebracht ist, eine Heißklebfolie, vorzugsweise eine Heißkleb-Kunststofffolie ist, die abgezogen werden kann; insbesondere ein Polyester.
  10. Vorrichtung nach einem der Ansprüche 1-9, wobei mehrere nur perforierte Folienlagen (8, 10) vorgesehen sind, wobei mindestens eine Folie (10), die über der unteren Folie (8) angebracht ist, Perforationen (18) mit einer Gesamtdurchlässigkeitsfläche aufweist, die kleiner ist als die Gesamtdurchlässigkeitsfläche der Perforationen in der unteren Folie.
  11. Vorrichtung nach einem der Ansprüche 1-10, wobei mehrere nur perforierte Folienlagen (8, 10) vorgesehen sind, wobei mindestens eine Folie (10), die über der unteren Folie (8) angebracht ist, Perforationen mit einem Durchmesser zwischen 10 - 1000 µm, vorzugsweise zwischen 20 - 100 µm und insbesondere einem Durchmesser zwischen 40 - 60 µm enthält.
  12. Vorrichtung nach einem der Ansprüche 1-11, wobei mehrere nur perforierte Folienlagen (8, 10) vorgesehen sind, wobei mindestens eine Folie (10), die über der unteren Folie (8) angebracht ist, Perforationen mit einer Dichte von 10 bis 1000 Perforationen pro m2 enthält.
  13. Vorrichtung nach einem der Ansprüche 1 - 12, wobei ein Behälter verwendet wird, der in verschiedene Abteilungen unterteilt ist, wobei mindestens die untere Folie (8) auch auf einer Trennwand der verschiedenen Abteilungen befestigt ist.
  14. Verfahren zum Herstellen einer Vorrichtung für das Verpacken und Zubereiten von Lebensmitteln, wobei ein Behälter (4) mit einer Lebensmittelportion (20) gefüllt wird, wonach der Behälter (4) hauptsächlich durch mindestens zwei übereinander angeordnete zwei Folien (8, 10), welche auf dem Behälter (4) befestigt sind, gasdicht und flüssigkeitsdicht verschlossen wird, wobei als die untere Folie (8) ein Folie (8) mit Perforationen (18) verwendet wird, durch welche Gas, wenigstens Dampf aus dem Behälter (4), während des Gebrauchs zwischen die Folien (8, 10) strömen kann, und zwar derart, dass es zu einem Druckaufbau zwischen den Folien kommt, dadurch gekennzeichnet, dass mindestens zwei Folien (8, 10) übereinander angeordnet und auf dem Behälter (4) ausschließlich an dem umlaufenden Rand (6) der Entnahmeöffnung (2) des Behälters (4) befestigt sind, wobei notwendigerweise die mindestens zwei Folienlagen (8, 10) über den gesamten Oberflächenbereich der Entnahmeöffnung (2) des Behälters (4) derart voneinander abgetrennt bleiben, dass dann, wenn während des Gebrauchs der Druck zwischen den beiden Folien (8, 10) einen oberen Grenzwert überschreitet, mindestens ein Teil der Abdichtung, welche die obere Folie mit dem Rand verbindet, durchbrochen und/oder die obere Folie zerrissen wird, so dass der Dampf zwischen den Folien entweicht.
  15. Verfahren nach Anspruch 14, wobei als die Folie oder als eine zweite Folie (10), die oben auf der unteren Folie (8) angeordnet ist, eine gasdichte und flüssigkeitsdichte Folie verwendet wird.
  16. Verfahren nach Anspruch 14 oder 15, wobei die Folienlagen (8, 10) auf dem Behälter (4) und/oder aufeinander befestigt, insbesondere abgedichtet sind, wobei die untere Folie (8) derart mit dem Behälter (4) verbunden ist, dass diese Verbindung fester ist als die Verbindung zwischen der Folie oder einer jeden über ihr angeordneten Folie (10) und der unteren Folie (8) und/oder dem Behälter (4), und die eine sowie die andere derart sind, dass sich die zweite Folie (10) beim Gebrauch infolge eines Druckaufbaus zwischen den Folien (8, 10) löst oder wenigstens teilweise löst, ohne dass sich die untere Folie (8) vom Behälter löst.
  17. Verfahren zum Herstellen einer Vorrichtung für das Verpacken und Zubereiten von Lebensmitteln nach einem der Ansprüche 14 - 16, wobei ein Behälter (4) verwendet wird, der in verschiedene Abteilungen unterteilt ist, wobei mindestens die untere Folie (8) auch auf einer Trennwand der verschiedenen Abteilungen befestigt ist.
  18. Verfahren zum Zubereiten von Lebensmitteln, wobei das Lebensmittel in einen Behälter (4) gelegt wird, der Behälter mit mindestens einer perforierten unteren Folie (8) und einer zweiten, oben auf ihr angeordneten Folie (10) verschlossen ist, wobei die untere Folie (8) und die zweite Folie (10) auf dem Behälter ausschließlich an dem umlaufenden Rand (6) der Entnahmeöffnung (2) des Behälters (4) befestigt sind, wobei notwendigerweise die mindestens zwei Folienlagen (8, 10) über den gesamten Oberflächenbereich der Entnahmeöffnung (2) des Behälters (4) voneinander abgetrennt bleiben, wonach der Behälter (4) in einem geschlossenen Zustand in einen Herd, vorzugsweise in einen Mikrowellenherd oder einen Dampfherd, gestellt wird, wonach das Lebensmittel derart erhitzt wird, dass sich in dem Behälter Dampf entwickelt, wobei der Dampf wenigstens zum Teil zwischen die perforierte Folie und die zweite Folie strömt und einen höheren Druck zwischen den Folien herbeiführt, wobei sich die zweite Folie wenigstens teilweise lockert und/oder in der Nähe des umlaufenden Randes reißt, so dass der aufgebaute Druck abgelassen wird, während die untere Folie am Behälter befestigt bleibt und der Druck im Behälter wenigstens etwas über dem Atmosphärendruck gehalten wird.
  19. Verfahren für die Zubereitung von Lebensmitteln, wobei das Lebensmittel in einen Behälter (4) gemäß Anspruch 18 gelegt und ein Behälter (4) verwendet wird, der in verschiedene Abteilungen unterteilt ist, wobei mindestens die untere Folie (8) auch auf einer Trennwand der verschiedenen Abteilungen befestigt ist.
EP01995818A 2000-12-22 2001-12-27 Erwärmbares lebensmittelpaket mit entlüftungsmittel Expired - Lifetime EP1353860B1 (de)

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NL1016978 2000-12-22
NL1016978A NL1016978C2 (nl) 2000-12-22 2000-12-22 Inrichting en werkwijze voor het verpakken en bereiden van voedsel en werkwijze voor het vervaardigen van een dergelijke inrichting.
PCT/NL2001/000943 WO2002051716A1 (en) 2000-12-22 2001-12-27 Heatable food package with venting means

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EP1353860B1 true EP1353860B1 (de) 2006-06-14

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NL1016978C2 (nl) 2002-06-25
ATE329854T1 (de) 2006-07-15
EP1353860A1 (de) 2003-10-22
WO2002051716A1 (en) 2002-07-04
DE60120763T2 (de) 2007-06-14
ES2266306T3 (es) 2007-03-01

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