EP0214287B1 - Receptacle, particularly for the carrying of food - Google Patents

Receptacle, particularly for the carrying of food Download PDF

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Publication number
EP0214287B1
EP0214287B1 EP86902357A EP86902357A EP0214287B1 EP 0214287 B1 EP0214287 B1 EP 0214287B1 EP 86902357 A EP86902357 A EP 86902357A EP 86902357 A EP86902357 A EP 86902357A EP 0214287 B1 EP0214287 B1 EP 0214287B1
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EP
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Prior art keywords
layer
receptacle according
dish
plastics
blank
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EP86902357A
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German (de)
French (fr)
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EP0214287A1 (en
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Aldo Artusi
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    • 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
    • B65D81/343—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 a conventional oven, e.g. a gas or electric resistance oven
    • 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
    • B65D77/04—Articles or materials enclosed in two or more containers disposed one within another
    • B65D77/0413—Articles or materials enclosed in two or more containers disposed one within another the inner and outer containers being rigid or semi-rigid and the outer container being of polygonal cross-section formed by folding or erecting one or more blanks, e.g. carton
    • B65D77/0433—Articles or materials enclosed in two or more containers disposed one within another the inner and outer containers being rigid or semi-rigid and the outer container being of polygonal cross-section formed by folding or erecting one or more blanks, e.g. carton the inner container being a tray or like shallow container, not formed by folding or erecting one or more blanks
    • 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

Definitions

  • the invention relates to a receptacle with a one-piece shell made of a thermoplastic material with an approximately horizontally projecting edge collar, an otherwise separate cut from end and side walls and a bottom being connected to the side edge collar of the shell only via laterally horizontally projecting edge strips and a plastic film or a cover formed from cardboard or plastic coated cardboard is sealed onto the edge collar.
  • a shell is known from European Patent 0 012 026, in which a heat-resistant plastic layer is a layer of a composite material which consists at least of a further layer of a heat-resistant material which cannot be changed by the radiation, as a support or support structure for the layer of plastic consists.
  • This container has the essential advantage that it can be pushed together with its contents into an oven without the plastic interior coating melting or the contents being caked on the plastic interior coating.
  • a packaging container for example, which is to be hermetically sealed, cannot be produced from such a composite material using the deep-drawing process.
  • fibrous layers in particular cardboard, have the considerable advantage that they consist of a material which cannot be changed by electron radiation, but on the other hand can be printed very easily.
  • a container that consists solely of the o. G. thermoplastic or from such a multilayer plastic is unsuitable for its use in an oven or the like.
  • the edge collars of containers which have been sealed in connection with a device according to the German patent application P 32 43 634.3 are so affected by the heat in the oven that they curl. This not only gives the container an unsightly appearance, but in the negative case can also adversely affect the tightness between the sealing film or lid and the container.
  • FR-A 2 051 643 shows a thermoplastic plastic shell in which the plastic shell itself has an edge collar and the side walls are covered with a reinforcing blank.
  • FR-A 2 141 254 shows a container which consists of a multi-layer material.
  • the inner surface of the container bottom and the container wall is formed by a layer of polyolefin and the outer surface of the container bottom and the container walls of a layer made of a synthetic, thermoplastic high heat resistance.
  • a layer of a chemical agent which brings these layers together is arranged between the material layers mentioned.
  • the container wall is bent outwards, so that either an outwardly pointing, horizontally running, flange-like mouth edge is created, or that a mouth roll is formed when the mouth edge is bent even further.
  • a flat cover can be sealed onto the mouth area.
  • a plastic shell according to the preamble of claim 1 is shown in GB-A 1 246 811.
  • this does not offer higher heat resistance and therefore cannot be exposed to an oven temperature.
  • the shell is surrounded by a blank and the edge collar is partially underlaid by the blank.
  • the inventor has set itself the goal of providing a heat-resistant container of the abovementioned.
  • the edge strips of two opposite walls are provided on both sides with extensions that connect to the non-extended edge strips of the other two sides to form a gapless corner area, and that the plastic layer for the shell to increase the temperature resistance of an energy-rich, electrons - Or has been exposed to electromagnetic radiation, which is designed so that the thermoplastic layer tolerates a permanent load of over 200 ° C (oven temperature).
  • the shell can be formed from a heat-resistant polyester or from a thermoplastic layer, for example from polyethylene, which has been exposed to high-energy, electron or electromagnetic radiation to increase its temperature resistance, which was designed so that the thermoplastic layer guarantees a permanent Endures a load of over 200 ° C (oven temperature).
  • Heat-resistant polyester can withstand 200 ° C within certain limits, but there are considerable temperature fluctuations in an oven due to insufficient control.
  • this blank can be inserted into the drawer known from DE-OS 32 10 566. After inserting the blank into the drawer, the shell is also inserted and the sealing device is lowered onto the edge collar resting on the edge strips. If desired, this can be used to seal with or without a sealing film or lid. It has been shown in practice that the edge strips of the blank have the effect that the edge collar does not curl. This means that the container maintains its desired original shape, but is now cut to size as a supporting and supporting structure. There are no leaks with a sealed film or a lid.
  • the blank preferably consists of a layer of fibrous material with a plastic inner coating.
  • This plastic inner coating can on the one hand bond well with the thermoplastic plastic layer of the edge collar when sealing, while on the other hand the fiber layer is suitable for printing or labeling. Since the blank is only produced by folding along folding lines, there is also no warping of the fibrous layer with respect to the plastic inner coating, as was observed in deep-drawn container production. Since the plastic inner coating does not come into contact with the contents, it does not matter whether it melts at the oven temperature. Therefore inexpensive non-irradiated polyethylene, hot melt or thermo lacquer can be used.
  • the fibrous layer may preferably consist of recycled cellulose-containing material or cardboard.
  • the shell itself can in turn consist entirely of a single layer of polyester or a cross-linked, thermoplastic.
  • polyethylene is an option here.
  • the thermoplastic material should form the inner skin and the further layer the outer skin, it being possible for further layers to be arranged between the two layers.
  • An outer skin made of heat-resistant polystyrene is preferred. As mentioned above, however, materials that cannot be changed by radiation or other thermoplastic materials can also be used as outer skin, if desired.
  • a film or a cover made of cardboard for example, can be sealed onto the bowl. If the above-mentioned sealing machines are used, the film is sealed onto the edge collar of the shell, on the other hand, the edge strip of the blank.
  • the container is very stable and in particular also dimensionally stable, very inexpensive to manufacture, since both the polyethylene used and the recycled fiber layers are cheap.
  • the blank can easily be imprinted. Even after a longer period of time in the oven at the oven temperature, the container does not change, and in particular there is no caking of the contents on the dish.
  • a sealable packaging container R consists of three parts, namely a cardboard blank 1, a shell 2 and a sealing film 3.
  • the cardboard blank 1 has a base part 4 and two sides or end walls 7 and 8 separated from the base part 4 by means of fold lines 5 and 6. From the sides or End walls 7 and 8 are edge strips 9 and 10 separated by further folding lines 11 and 12 respectively. To improve the bend along the fold lines 5, 6, 11, 12, these are provided with longitudinal slots 13.
  • the blank Due to the wedge-shaped shape of the side or end walls 7 and 8 and an overlap area 20 of the edge strips 10, the blank forms a container in the position of use in which the corner areas are also closed.
  • the shell 2 is made in one piece from plastic shaped and has a circumferential edge collar 14 which is completely undercut by the edge strips 9 and 10 and the overlap region 20 in the position of use.
  • sealing film 3 One of the commercially available sealable plastic films is used as the sealing film 3, but any other sealable cover, such as a cardboard box or a cardboard box coated with plastic, can also be used here.
  • the cardboard blank 1 consists of an outwardly facing fibrous layer 16, which is coated with a plastic inner coating 17, preferably made of polyethylene.
  • the shell 2 has an outer skin 18 made of a plastic, preferably made of polystyrene, and an inner skin 19 made of a crosslinkable plastic, preferably polyethylene.
  • the sealing film 3 does not consist of a composite material.
  • edge collar 14 is not only connected to the sealing foil 3, but also to the edge strips 9 and 10 of the cardboard blank 1.
  • the cardboard blank 1 is particularly suitable for being placed in a drawer of a sealing machine shown in DE-OS 32 10 566 or DE-OS 32 43 634.3. After inserting the shell 2 in the cardboard blank, the sealing film 3 is sealed.

Abstract

A receptacle, particularly for the carrying of food and similar items, moulded of at least one layer of heat-resistant plastic. The basin (2) thus formed is enclosed in another layer (1) cut to fit its outside dimensions, which is at least partially bonded to the basin (2) itself.

Description

Die Erfindung betrifft einen Aufnahmebehälter mit einer einstückigen Schale aus einem thermoplastischen Kunststoff mit einem etwa horizontal abstehenden Randkragen, wobei ein ansonsten von der Schale getrennter Zuschnitt aus Stirn-und Seitenwänden und einem Boden nur über seitlich horizontal abstehende Randstreifen mit dem seitlichen Randkragen der Schale verbunden und eine Kunststoffolie oder ein aus Karton oder Kunststoff beschichteter Karton geformter Deckel auf die Randkragen aufgesiegelt ist.The invention relates to a receptacle with a one-piece shell made of a thermoplastic material with an approximately horizontally projecting edge collar, an otherwise separate cut from end and side walls and a bottom being connected to the side edge collar of the shell only via laterally horizontally projecting edge strips and a plastic film or a cover formed from cardboard or plastic coated cardboard is sealed onto the edge collar.

Aus dem Europäischen Patent 0 012 026 ist eine Schale bekannt, bei der eine hitzebeständige Kunststoffschicht eine Schicht eines Verbundwerkstoffes ist, der zumindest aus einer weiteren Schicht aus einem hitzebeständigen, von der Strahlung nicht veränderbaren Werkstoff als Träger- bzw. Stützgerüst für die Schicht aus Kunststoff besteht. Dieser Behälter hat den wesentlichen Vorteil, daß er zusammen mit seinem Füllgut in einen Backofen geschoben werden kann, ohne daß es zum Aufschmelzen der Kunststoffinnenbeschichtung kommt oder zu einem Anbacken des Füllgutes an der Kunststoffinnenbeschichtung.A shell is known from European Patent 0 012 026, in which a heat-resistant plastic layer is a layer of a composite material which consists at least of a further layer of a heat-resistant material which cannot be changed by the radiation, as a support or support structure for the layer of plastic consists. This container has the essential advantage that it can be pushed together with its contents into an oven without the plastic interior coating melting or the contents being caked on the plastic interior coating.

Andererseits bereitet die Herstellung eines Behälters aus einem derartigen Verbundwerkstoff dann Schwierigkeiten, wenn beispielsweise als zweite Schicht eine Faserstofflage Anwendung findet. Aus einem derartigen Verbundwerkstoff kann beispielsweise ein Verpackungsbehälter, der hermetisch verschlossen werden soll, nicht im Tiefziehverfahren hergestellt werden. Andererseits weisen gerade Faserstofflagen, insbesondere Karton, den erheblichen Vorteil auf, daß sie aus einem durch die Elektronenstrahlung nicht veränderbaren Werkstoff bestehen, andererseits aber sehr leicht bedruckt werden können.On the other hand, the production of a container from such a composite material is difficult if, for example, a fiber layer is used as the second layer. A packaging container, for example, which is to be hermetically sealed, cannot be produced from such a composite material using the deep-drawing process. On the other hand, fibrous layers, in particular cardboard, have the considerable advantage that they consist of a material which cannot be changed by electron radiation, but on the other hand can be printed very easily.

Weiterhin hat sich herausgestellt, daß ein Behälter, der allein aus dem o. g. thermoplastischen Kunststoff oder aus einem derartigen Mehrschichtkunststoff besteht, für seine Verwendung in einem Backofen od. dgl. ungeeignet ist. So werden beispielsweise die Randkragen von Behältern, welche im Zusammenhang mit einer Vorrichtung nach der deutschen Patentanmeldung P 32 43 634.3 versiegelt wurden, durch die Hitzeeinwirkung im Backofen so beeinflußt, daß sie sich wellen. Dies gibt dem Behälter nicht nur ein unschönes Aussehen, sondern kann im negativen Fall auch die Dichtigkeit zwischen Siegelfolie bzw. Deckel und Behälter ungünstig beeinflussen.Furthermore, it has been found that a container that consists solely of the o. G. thermoplastic or from such a multilayer plastic, is unsuitable for its use in an oven or the like. For example, the edge collars of containers which have been sealed in connection with a device according to the German patent application P 32 43 634.3 are so affected by the heat in the oven that they curl. This not only gives the container an unsightly appearance, but in the negative case can also adversely affect the tightness between the sealing film or lid and the container.

In der FR-A 2 051 643 wird eine thermoplastische Kunststoffschale gezeigt, bei der zwar die Kunststoffschale selbst einen Randkragen besitzt und die Seitenwände mit einem verstärkendem Zuschnitt bedeckt sind.FR-A 2 051 643 shows a thermoplastic plastic shell in which the plastic shell itself has an edge collar and the side walls are covered with a reinforcing blank.

Allerdings handelt es sich hier nicht um eine Schale aus bestrahltem Kunststoff. Ferner wird der Randkragen nicht unterlegt. Aus diesem Grunde sinkt der Randkragen bei Beaufschlagung mit Backofentemperatur ab, wodurch in jedem Fall ein Dichthalten zwischen Folie und Schale nicht mehr gewährleistet ist.However, this is not a bowl made of irradiated plastic. Furthermore, the collar is not underlaid. For this reason, the edge collar drops when the oven temperature is applied, which means that sealing between the film and the tray is no longer guaranteed.

In der FR-A 2 141 254 wird ein Behälter gezeigt, welcher aus einem mehrschichtigen Werkstoff besteht. Die Innenfläche des Behälter bodens und der Behälterwand wird durch eine Schicht aus Polyolefin und die Außenfläche des Behälterbodens und der Behälterwände aus einer Schicht aus einem synthetischen, thermoplastischen Kunststoff hoher Wärmebeständigkeit gebildet. Zwischen den genannten Werkstoffschichten ist eine den Verbund dieser Schichten bewirkende Schicht aus einem chemischen Mittel angeordnet. Im Bereich der Bechermündung ist die Behälterwand nach außen gebogen, so daß entweder ein nach außen weisender, horizontal verlaufender, flanschartiger Mündungsrand entsteht, oder daß bei noch weiterem Umbiegen des Mündungsrandes eine Mundrolle gebildet wird. Auf den Mündungsbereich kann ein planer Deckel aufgesiegelt werden.FR-A 2 141 254 shows a container which consists of a multi-layer material. The inner surface of the container bottom and the container wall is formed by a layer of polyolefin and the outer surface of the container bottom and the container walls of a layer made of a synthetic, thermoplastic high heat resistance. A layer of a chemical agent which brings these layers together is arranged between the material layers mentioned. In the area of the cup mouth, the container wall is bent outwards, so that either an outwardly pointing, horizontally running, flange-like mouth edge is created, or that a mouth roll is formed when the mouth edge is bent even further. A flat cover can be sealed onto the mouth area.

Auch hier wird infolge der Nichtunterstützung dieses Randkragens bzw. Mündungsrandes das Problem des Dichthaltens zwischen Randkragen und aufgesiegeltem Deckel bestehen bleiben. Ferner kann auch bei wärmebeständigem Kunststoff nicht vermieden werden, daß die Seitenwände, da sie keinerlei Unterstützung besitzen, bei Beaufschlagung mit Backofentemperatur einfallen.Here too, due to the non-support of this edge collar or mouth edge, the problem of keeping tight between the edge collar and the sealed lid will remain. Furthermore, even in the case of heat-resistant plastic, it cannot be avoided that the side walls, since they have no support at all, collapse when the oven temperature is applied.

Eine Kunststoffschale entsprechend dem Oberbegriff von Anspruch 1 wird in der GB-A 1 246 811 gezeigt. Diese bietet allerdings keine höhere Wärmebeständigkeit und kann deswegen nicht einer Backofentemperatur ausgesetzt werden. Andererseits wird dort die Schale von einem Zuschnitt umfangen und der Randkragen zum Teil von dem Zuschnitt unterlegt. In der Praxis hat sich aber erwiesen, daß ein nur teilweises Unterlegen des Randkragens zu erheblichen Leckagen zwischen der aufgesiegelten Folie und dem Randkragen führt. Bereits beim Aufsiegeln der Folie selbst kommt es in diesem Bereich zu einem geringfügigen Einfall des Randkragens, so daß keine abdichtende Verbindung zwischen Folie und Randkragen hergestellt wird.A plastic shell according to the preamble of claim 1 is shown in GB-A 1 246 811. However, this does not offer higher heat resistance and therefore cannot be exposed to an oven temperature. On the other hand, the shell is surrounded by a blank and the edge collar is partially underlaid by the blank. In practice, however, it has been found that only partially underlaying the edge collar leads to considerable leakages between the sealed film and the edge collar. Even when the film itself is sealed, the marginal collar collapses slightly in this area, so that no sealing connection is made between the film and the marginal collar.

Der Erfinder hat sich zum Ziel gesetzt, einen hitzebeständigen Behälter der o. g. Art zu entwikkeln, bei welchem die o. g. Nachteile nicht auftreten, welcher insbesondere sehr stabil ist und bei Temperaturbeaufschlagung stabil und dicht bleibt, der andererseits leicht zu beschriften bzw. zu bedrucken ist und in einer aus der DE-OS 32 10 566 bzw. DE-OS 32 43 634 bekannten Vorrichtung Anwendung finden kann.The inventor has set itself the goal of providing a heat-resistant container of the abovementioned. Develop type in which the above-mentioned. Disadvantages do not occur, which in particular is very stable and remains stable and tight when exposed to temperature, which on the other hand is easy to label or print and can be used in a device known from DE-OS 32 10 566 or DE-OS 32 43 634 can.

Zur Lösung dieser Aufgabe führt, daß die Randstreifen zweier gegenüberliegender Wände beidseitig mit Verlängerungen versehen sind, die an die nicht verlängerten Randstreifen der anderen beiden Seiten unter Ausbildung eines lückenlosen Eckbereiches anschließen, und daß die Kunststoffschicht für die Schale zur Erhöhung der Temperaturbelastbarkeit einer energiereichen, elektronen- oder elektromagnetischen Bestrahlung ausgesetzt worden ist, welche so ausgebildet ist, daß die thermoplastische Kunststoffschicht eine dauernde Belastung von über 200°C (Backofentemperatur) verträgt.To solve this problem, the edge strips of two opposite walls are provided on both sides with extensions that connect to the non-extended edge strips of the other two sides to form a gapless corner area, and that the plastic layer for the shell to increase the temperature resistance of an energy-rich, electrons - Or has been exposed to electromagnetic radiation, which is designed so that the thermoplastic layer tolerates a permanent load of over 200 ° C (oven temperature).

Dieser Zuschnitt bewirkt, daß die Schale ein Stützgerüst erhält. Dabei kann die Schale erfindungsgemäß aus einem hitzebeständigen Polyester oder aus einer thermoplastischen Kunststoffschicht, beispielsweise aus Polyäthylen geformt sein, welche zur Erhöhung ihrer Temperaturbelastbarkeit einer energiereichen, elektronen- oder elektromagnetischen Bestrahlung ausgesetzt worden ist, die so ausgelegt war, daß die thermoplastische Kunststoffschicht garantiert eine dauernde Belastung von über 200°C (Backofentemperatur) erträgt. Hitzebeständiger Polyester erträgt zwar auch in bestimmten Grenzen 200°C, jedoch herrschen in einem Backofen wegen ungenügender Regelung erhebliche Temperaturschwankungen.This cut ensures that the shell receives a support structure. According to the invention, the shell can be formed from a heat-resistant polyester or from a thermoplastic layer, for example from polyethylene, which has been exposed to high-energy, electron or electromagnetic radiation to increase its temperature resistance, which was designed so that the thermoplastic layer guarantees a permanent Endures a load of over 200 ° C (oven temperature). Heat-resistant polyester can withstand 200 ° C within certain limits, but there are considerable temperature fluctuations in an oven due to insufficient control.

Diese bevorzugte Ausführungsform ermöglicht einmal ein sehr einfaches Herstellen des Zuschnitts, zum anderen kann dieser Zuschnitt in die aus der DE-OS 32 10 566 bekannte Schublade eingelegt werden. Nach Einlegen des Zuschnitts in die Schublade wird auch die Schale eingelegt und die Siegelvorrichtung auf den den Randstreifen aufliegenden Randkragen angesenkt. Damit kann, wenn gewünscht, ein Siegeln mit oder ohne Siegelfolie bzw. Deckel vorgenommen werden. Es hat sich in der Praxis gezeigt, daß die Randstreifen des Zuschnitts die Wirkung haben, daß sich der Randkragen nicht wellt. Das bedeutet, daß der Behälter seine gewünschte ursprüngliche Form einhält, jetzt jedoch mit dem Zuschnitt als Stütz-und Traggerüst versehen ist. Leckagen bei einer aufgesiegelten Folie bzw. einem Deckel treten nicht auf.This preferred embodiment enables a very simple production of the blank, on the other hand, this blank can be inserted into the drawer known from DE-OS 32 10 566. After inserting the blank into the drawer, the shell is also inserted and the sealing device is lowered onto the edge collar resting on the edge strips. If desired, this can be used to seal with or without a sealing film or lid. It has been shown in practice that the edge strips of the blank have the effect that the edge collar does not curl. This means that the container maintains its desired original shape, but is now cut to size as a supporting and supporting structure. There are no leaks with a sealed film or a lid.

Bevorzugt besteht der Zuschnitt aus einer Faserstofflage mit einer Kunststoffinnenbeschichtung. Diese Kunststoffinnenbeschichtung kann sich einerseits gut mit der thermoplastischen Kunststoffschicht des Randkragens beim Aufsiegeln verbinden, während andererseits die Faserstofflage zum Bedrucken bzw. Beschriften geeignet ist. Da der Zuschnitt lediglich durch Knicken entlang von Knicklinien hergestellt wird, findet auch kein Verziehen der Faserstofflage gegenüber der Kunststoffinnenbeschichtung statt, wie dies bei einer Behälterherstellung durch Tiefziehen beobachtet wurde. Da die Kunststoffinnenbeschichtung auch nicht mit dem Füllgut in Berührung kommt, ist es gleichgültig, ob sie bei Backofentemperatur aufschmilzt. Deshalb kann billiges unbestrahltes Polyäthylen, Hotmelt oder Thermolack Anwendung finden.The blank preferably consists of a layer of fibrous material with a plastic inner coating. This plastic inner coating can on the one hand bond well with the thermoplastic plastic layer of the edge collar when sealing, while on the other hand the fiber layer is suitable for printing or labeling. Since the blank is only produced by folding along folding lines, there is also no warping of the fibrous layer with respect to the plastic inner coating, as was observed in deep-drawn container production. Since the plastic inner coating does not come into contact with the contents, it does not matter whether it melts at the oven temperature. Therefore inexpensive non-irradiated polyethylene, hot melt or thermo lacquer can be used.

Die Faserstofflage kann bevorzugt aus rezykliertem, Zellulose enthaltendem Material bzw. Karton bestehen.The fibrous layer may preferably consist of recycled cellulose-containing material or cardboard.

Da dieses in der Regel beschriftet, bedruckt, mit einem Aufkleber od. dgl. versehen wird, ist es unschädlich, wenn derartiges Abfallmaterial Anwendung findet. Die Kosten werden dadurch selbstverständlich wesentlich geringer gehalten.Since this is generally labeled, printed, provided with a sticker or the like, it is harmless if such waste material is used. Of course, the costs are kept considerably lower.

Die hier gemachten Angaben über das Material des Zuschnitts sind nur beispielhaft, da viele andere Materialien ebenso geeignet erscheinen.The information given here about the material of the blank is only exemplary, since many other materials also appear to be suitable.

Die Schale selbst kann nun wiederum, wie oben erwähnt, ganz aus einer einzigen Schicht aus Polyester oder einem vernetzten, thermoplastischen Kunststoff bestehen. Aus Kostengründen bietet sich hier Polyäthylen an. Aus Festigkeitsgründen wird es jedoch in der Praxis zweckmäßiger sein, einen Verbundwerkstoff zu wählen. In jedem Fall soll der thermoplastische Kunststoff die Innenhaut und die weitere Schicht die Außenhaut bilden, wobei zwischen beiden Schichten auch noch weitere Schichten angeordnet sein können. Bevorzugt wird eine Außenhaut aus möglichst wärmebeständigem Polystyrol. Wie oben erwähnt, bieten sich jedoch je nach Wunsch auch durch Strahlung nicht veränderbare Werkstoffe oder andere thermoplastische Kunststoffe als Außenhaut an.As mentioned above, the shell itself can in turn consist entirely of a single layer of polyester or a cross-linked, thermoplastic. For cost reasons, polyethylene is an option here. For reasons of strength, however, it will be more practical to choose a composite material. In any case, the thermoplastic material should form the inner skin and the further layer the outer skin, it being possible for further layers to be arranged between the two layers. An outer skin made of heat-resistant polystyrene is preferred. As mentioned above, however, materials that cannot be changed by radiation or other thermoplastic materials can also be used as outer skin, if desired.

Soll nun in dem Behälter Füllgut aufgenommen werden, welches beispielsweise leicht verderblich ist, so kann eine Folie oder ein Deckel beispielsweise aus Karton auf die Schale aufgesiegelt werden. Im Falle der Anwendung der oben genannten Siegelmaschinen wird die Folie auf den Randkragen der Schale andererseits der Randstreifen des Zuschnitts aufgesiegelt.If contents are to be accommodated in the container which, for example, are perishable, a film or a cover made of cardboard, for example, can be sealed onto the bowl. If the above-mentioned sealing machines are used, the film is sealed onto the edge collar of the shell, on the other hand, the edge strip of the blank.

Insgesamt ist der Behälter sehr stabil und insbesondere auch formstabil, sehr kostengünstig herzustellen, da sowohl das verwendete Polyäthylen als auch die rezyklierten Faserstofflagen billig sind. Der Zuschnitt kann ohne Schwierigkeiten mit Aufdrucken versehen werden. Auch nach einer längeren Verweilzeit im Backofen bei Backofentemperatur verändert sich der Behälter nicht, insbesondere findet auch kein Anbacken des Füllgutes an der Schale statt.Overall, the container is very stable and in particular also dimensionally stable, very inexpensive to manufacture, since both the polyethylene used and the recycled fiber layers are cheap. The blank can easily be imprinted. Even after a longer period of time in the oven at the oven temperature, the container does not change, and in particular there is no caking of the contents on the dish.

Durch die plane Aufsiegelung des Deckels bzw. der Folie auch in den Randbereichen ist eine Stabilität in dieser kritischen Zone gewährleistet.Stability in this critical zone is ensured by the flat sealing of the cover or the film also in the edge areas.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung bevorzugter Ausführungsbeispiele sowie anhand der Zeichnung; diese zeigt in

  • Figur 1 einen Querschnitt durch einen erfindungsgemäßen Verpackungsbehälter;
  • Figur 2 eine Draufsicht auf einen erfinduhgsgemäßen Zuschnitt.
Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in
  • Figure 1 shows a cross section through a packaging container according to the invention;
  • Figure 2 is a plan view of a blank according to the invention.

Ein versiegelbarer Verpackungsbehälter R besteht nach Figur 1 aus drei Teilen, nämlich einem Kartonzuschnitt 1, einer Schale 2 und einer Siegelfolie 3.According to FIG. 1, a sealable packaging container R consists of three parts, namely a cardboard blank 1, a shell 2 and a sealing film 3.

Der Kartonzuschnitt 1 weist gemäß Figur 2 ein Bodenteil 4 und je zwei über Knicklinien 5 und 6 vom Bodenteil 4 getrennte Seiten bzw. Stirnwände 7 bzw. 8 auf. Von den Seitenbzw. Stirnwänden 7 bzw. 8 sind jeweils Randstreifen 9 bzw. 10 durch weitere Knicklinien 11 bzw. 12 abgetrennt. Zur Verbesserung der Biegung entlang den Knicklinien 5, 6, 11, 12 sind diese mit Längsschlitzen 13 versehen.According to FIG. 2, the cardboard blank 1 has a base part 4 and two sides or end walls 7 and 8 separated from the base part 4 by means of fold lines 5 and 6. From the sides or End walls 7 and 8 are edge strips 9 and 10 separated by further folding lines 11 and 12 respectively. To improve the bend along the fold lines 5, 6, 11, 12, these are provided with longitudinal slots 13.

Der Zuschnitt bildet infolge der keilförmigen Ausformung der Seiten- bzw. Stirnwände 7 und 8 und eines Uberlappungsbereiches 20 der Randstreifen 10 in Gebrauchslage einen Behälter, bei dem auch die Eckbereiche geschlossen sind.Due to the wedge-shaped shape of the side or end walls 7 and 8 and an overlap area 20 of the edge strips 10, the blank forms a container in the position of use in which the corner areas are also closed.

Die Schale 2 ist einstückig aus Kunststoff geformt und weist einen umlaufenden Randkragen 14 auf, der in Gebrauchslage vollständig von den Randstreifen 9 und 10 sowie dem Überlappungsbereich 20 untergriffen wird.The shell 2 is made in one piece from plastic shaped and has a circumferential edge collar 14 which is completely undercut by the edge strips 9 and 10 and the overlap region 20 in the position of use.

Als Siegelfolie 3 findet eine der handelsüblichen siegelbaren Kunststoffolien Anwendung, wobei hier aber auch jede andere siegelbare Abdeckung, wie beispielsweise ein Karton oder ein mit Kunststoff beschichteter Karton, Anwendung finden kann.One of the commercially available sealable plastic films is used as the sealing film 3, but any other sealable cover, such as a cardboard box or a cardboard box coated with plastic, can also be used here.

In Figur 1 wird der Schichtaufbau der einzelnen Behälterteile 1, 2 und 3 gezeigt. Der Kartonzuschnitt 1 besteht aus einer nach außen gerichteten Faserstofflage 16, welche mit einer Kunststoffinnenbeschichtung 17, vorzugsweise aus Polyäthylen, belegt ist. Die Schale 2 weist eine Außenhaut 18 aus einem Kunststoff, vorzugsweise aus Polystyrol, und eine Innenhaut 19, aus einem vernetzbaren Kunststoff, vorzugsweise Polyäthylen, auf.In Figure 1, the layer structure of the individual container parts 1, 2 and 3 is shown. The cardboard blank 1 consists of an outwardly facing fibrous layer 16, which is coated with a plastic inner coating 17, preferably made of polyethylene. The shell 2 has an outer skin 18 made of a plastic, preferably made of polystyrene, and an inner skin 19 made of a crosslinkable plastic, preferably polyethylene.

Die Siegelfolie 3 besteht im vorliegenden Ausführungsbeispiel nicht aus einem Verbundwerkstoff.In the present exemplary embodiment, the sealing film 3 does not consist of a composite material.

Nach dem Siegelvorgang selbst ist der Randkragen 14 nicht nur mit der Siegelfolie 3 verbunden, sondern auch mit den Randstreifen 9 und 10 des Kartonzuschnittes 1.After the sealing process itself, the edge collar 14 is not only connected to the sealing foil 3, but also to the edge strips 9 and 10 of the cardboard blank 1.

Die übrigen Teile von Kartonzuschnitt 1 und Schale 2 gehen keine Verbindung miteinander ein.The remaining parts of cardboard blank 1 and tray 2 are not connected.

Der Kartonzuschnitt 1 ist besonders dazu geeignet, in eine Schublade einer in der DE-OS 32 10 566 oder der DE-OS 32 43 634.3 gezeigten Siegelmaschine gelegt zu werden. Nach Einlegen der Schale 2 in den Kartonzuschnitt wird die Siegelfolie 3 aufgesiegelt.The cardboard blank 1 is particularly suitable for being placed in a drawer of a sealing machine shown in DE-OS 32 10 566 or DE-OS 32 43 634.3. After inserting the shell 2 in the cardboard blank, the sealing film 3 is sealed.

Claims (8)

1. Receptacle with a single-piece dish (2) of a thermoplastic material having a horizontally projecting rim (14), wherein a blank (1) consisting of end and side walls (7, 8) and a base (4) and otherwise separated from the dish is connected to the lateral rim (14) of the dish (2) only by edge strips (9, 10) projecting horizontally at the sides and a plastics film or a cover (3) shaped from cardboard or plastics-coated cardboard is sealed onto the rims (14), characterised in that the edge strips (9, 10) of two opposing walls (7, 8) are provided on either side with extensions (20) which are attached to the unextended edge strips of the other two walls (7, 8) to form a gap-free corner region and in that, to increase its temperature tolerance, the plastics layer for the dish has been exposed to high-energy electron or electromagnetic radiation which is designed such that the thermoplastic material layer withstands a permanent load higher than 200°C (baking oven temperature).
2. Receptacle according to claim 1, characterised in that the dish (2) is produced from a composite material of which the inner skin (19) consists of a crosslinked thermoplastic material.
3. Receptacle according to claim 2, characterised in that the outer skin (18) of the composite material consists of a heat-resistant material which cannot be changed by radiation.
4. Receptacle according to claim 2, characterised in that the outer skin (18) of the composite material consists of a heat-resistant material which can also be changed by radiation.
5. Receptacle according to claim 4, characterised in that the outer skin (18) of the composite material consists of polystyrene.
6. Receptacle according to at least one of claims 1 to 5, characterised in that the blank (1) consists of a layer of fibrous material (16) with an internal coating (17) of plastics material.
7. Receptacle according to claim 6, characterised in that the internal plastics coating (17) consists of a thermoplastic material, preferably polyethylene, which has not been crosslinked or irradiated.
8. Receptacle according to claim 6 or 7, characterised in that the layer of fibrous material (16) is produced from recycled cellulose-containing material or cardboard.
EP86902357A 1985-02-22 1986-02-22 Receptacle, particularly for the carrying of food Expired - Lifetime EP0214287B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3506253A DE3506253C1 (en) 1985-02-22 1985-02-22 Heat-resistant receptacle
DE3506253 1985-02-22

Publications (2)

Publication Number Publication Date
EP0214287A1 EP0214287A1 (en) 1987-03-18
EP0214287B1 true EP0214287B1 (en) 1990-09-12

Family

ID=6263307

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86902357A Expired - Lifetime EP0214287B1 (en) 1985-02-22 1986-02-22 Receptacle, particularly for the carrying of food

Country Status (5)

Country Link
EP (1) EP0214287B1 (en)
CA (1) CA1269069A (en)
DE (2) DE3506253C1 (en)
WO (1) WO1986004880A1 (en)
ZA (1) ZA861312B (en)

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DE8717080U1 (en) * 1987-12-30 1988-03-31 H. & W. Gleich Fleischverarbeitungs- + Vertriebsgesellschaft Mbh, 1000 Berlin, De
GB2239444B (en) * 1989-10-23 1994-05-18 Rhone Poulenc Ltd Improvements in or relating to containers
US5484984A (en) * 1994-03-04 1996-01-16 Gics & Vermee, L.P. Ovenable food package including a base with depending leg member and a plurality of raised portions and associated food packages
US5492703A (en) * 1994-08-30 1996-02-20 Gics & Vermee, L.P. Food package including a food package tray partially surrounded by a food package jacket and an associated method
WO1996014982A1 (en) * 1994-08-30 1996-05-23 Gics & Vermee, L.P. Method of making a food package and an associated apparatus
US5565228A (en) * 1995-05-02 1996-10-15 Gics & Vermee, L.P. Ovenable food product tray and an ovenable food product package
US5709308A (en) * 1995-06-06 1998-01-20 Gics & Vermee, L.P. Food product container including a tray and a jacket and an associated food product package
US5743402A (en) * 1997-03-18 1998-04-28 Gics & Vermee, L.P. Food package including a tray and a sleeve
US5900263A (en) * 1997-06-26 1999-05-04 Gics & Vermee, L.P. Food package having a rigid leg member for displaying the front panel thereof
US5958484A (en) * 1997-10-28 1999-09-28 Gics & Vermee, L.P. Food package including a tray surrounded by a sleeve having an end flap
WO2009087608A1 (en) * 2008-01-12 2009-07-16 Vanda Janka Packaging for packaging, regenerating or maintaining a food product at the desired temperature
EP2441696A1 (en) 2010-10-14 2012-04-18 Packable B.V. Packaging for modified atmosphere packaging

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CH514475A (en) * 1969-07-09 1971-10-31 Intercan S A C O Fiduciaire Wa Installation for manufacturing receptacles comprising at least part of composite walls
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US3785544A (en) * 1972-05-15 1974-01-15 Phillips Petroleum Co Tray with strengthening member
DE2430900A1 (en) * 1974-06-27 1976-01-15 Torsten Jeppsson Ab Packing for food - has inner enclosed in outer container and sealed by outer re-usable cover
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CA1153216A (en) * 1980-05-12 1983-09-06 Guelfo A. Manizza Tray container with reinforced sidewalls

Also Published As

Publication number Publication date
DE3674116D1 (en) 1990-10-18
ZA861312B (en) 1986-12-30
EP0214287A1 (en) 1987-03-18
DE3506253C1 (en) 1986-07-31
WO1986004880A1 (en) 1986-08-28
CA1269069A (en) 1990-05-15

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