EP1127809A2 - Package with tearing lid - Google Patents

Abstract

The packaging container (10), in particular, for foodstuffs comprises a pull up lid (2) consisting of a foil (3) joined originally to the container top by a sealing seam (14) and a clamping element (4) which partially surrounds the beaded container rim (13) and is joined to the latter as a result of shape interlocking and/or material bonds. The container is reclosable by means of the clamping element which engages with the beaded container rim.

Description

The present invention relates to packaging, in particular for containing food a packaging container with a container edge surrounding the container opening and a tear-open lid applied over the container opening, and a method for Production of a packaging according to the invention with a tear-open cover.

Packaging container for e.g. Foods are often marginally by means sealed lid film closed. Such packaging is usually gas and impermeable to moisture, so the food contained therein, under certain circumstances can be kept for a long time without being cooled.

In particular, containers made of aluminum with a sealed aluminum cover film are due to the excellent barrier properties with regard to gases and moisture tight.

However, such packaging cannot be closed again after the cover film has been torn open. Often, however, the entire portion contained therein is not consumed at once, so there is a need to keep the packaging with the remaining content to close at least one more time.

For example, animal feed is placed in aluminum containers sealed with aluminum cover foils offered in stores. Often those are contained in such packaging Portions not at once, but within two or more days within one or more days or used several times. However, such packaging cannot appropriately reclosed, the content dries out and unpleasant spread Smells. There is also a risk that the contents of the package spoil quickly.

The invention is therefore based on the object of a packaging container, in particular for food, and a tear-off lid detachably attached to the container rim to propose, the packaging container closed with the tear-open lid sealed gas and moisture-tight up to the first opening and after the first opening or should be closable several times.

According to the invention, the object is achieved in that the tear-open cover is made of a cover film and one at the edge endlessly or in sections to form a detachable one or non-releasable connection zone attached to the cover sheet edge clamping element exists, and the container edge contains an edge surface with an end edge termination, and the tear-open cover with its cover film and / or with the edge clamping element underneath Forming a releasable connecting seam on the edge surface is fixed and the edge clamping element a positive and / or non-positive connection is established with the edge closure, wherein the packaging by loosening the positive and / or non-positive connection between Edge clamping element and edge termination and tearing of the detachable connecting seam is opened for the first time on the edge surface and the packaging container is opened again Place the tear-open lid on the container opening and manufacture the shape and / or Non-positive connection between the edge clamping element and the edge termination or can be closed again several times.

The releasable or non-releasable connection zone is preferably one by means of sealing, gluing or welding or pouring the edge clamping element produced flat connection seam. Said connection zone is advantageously a non-detachable, i.e. non-peelable or non-tearable, preferably by means of sealing, gluing or welding or pouring the edge clamping element produced, flat connecting seam.

The peelable or tearable connection seam serves to open the package and the separation of packaging container and tear-open lid as non-destructively as possible the preferably non-tearable connection zone, especially during the first opening should not be separated.

With clamps there is in particular a releasable positive and / or non-positive connection between the edge clamping element and the edge termination, which is preferably without additional fasteners.

A positive connection is made by the shape of the parts, whereby the cohesion by interlocking part contours with or without additional form elements he follows. The release of a positive connection is usually only with effort and usually only possible in preferred directions.

A non-positive connection is held together with the help of externally acting Forces such as frictional forces or other field forces on the component effective surfaces, which e.g. by elastic or elastic-plastic component or connecting element deformations (Hook forces) are applied. The release of a frictional connection is in the Usually only by generating corresponding counterforces or by lifting the effective ones Powers possible.

In a preferred embodiment of the invention, the connection is between Edge clamping element and edge termination by a combination of the two aforementioned Connection types, i.e. a so-called positive connection.

The positive and / or non-positive connection are e.g. by a bracket or Pliers, clip or tension effect or a combination of these causes these effects can be achieved with materials with elastic behavior, among other things.

The positive and / or non-positive connection can by the elastic behavior of the Edge termination and / or the edge clamping element happen. The form fit and / or The frictional connection is preferably made exclusively by the elastic behavior the edge clamping element, i.e. the edge finish is made when manufacturing and releasing the Connection not or not significantly deformed.

After reclosing, the packaging does not necessarily need to be absolutely gas and to be moisture proof. Rather, the packaging should be reclosed among other things, the premature drying of the contents or an excessive spread of smell prevent or reduce the content of the packaging over a certain period of time as well prevent the packaging contents from spoiling at an early stage.

The packaging container is expediently a packaging means for holding solid or pasty to liquid fillings, especially of food. The packaging container contains at least one container recess, which by one or more Side walls, a floor area, the floor area occasionally a backed floor area may include and a container opening, the container opening a protruding or cantilevered container edge is limited. The packaging container can e.g. be barrel-shaped, rectangular or polygonal.

A packaging container can preferably have several container recesses with container openings however, contain a container recess with a container opening. With several Container depressions form the connecting surfaces between the container depressions preferably sealable shoulder surfaces or adhesive surfaces.

The packaging container is expediently made of a monofilm made of metal or plastic or a composite film, such as a multilayer plastic film and in particular one Metal-plastic composite film. The composite film can be one or more films contain the same or different thermoplastics. Possibly the packaging container can also contain cellulose-containing materials, e.g. Cellophane, Cardboard or paper, contain or consist of.

Suitable plastics for the production of monofilms or foils in a composite foil are thermoplastics from the series of polyolefins, such as polyethylenes (PE), e.g. Low density PE (LDPE), medium density PE (MDPE), high density PE (HDPE) or polypropylenes, such as amorphous, crystalline, highly crystalline, isotactic or atactic Polypropylene, or cast polypropylene or uni- or biaxially stretched polypropylene as well Copolymers and polyblends of polypropylene. Other suitable thermoplastic Plastics are from the range of polyvinyl chloride, polyesters and linear polyesters and polyethylene terephthalate (PET). Other advantageous plastics are polystyrenes (PS) and the polyamides, such as PA 6, PA 66 or PA 12 or copolymers and terpolymers of the above Plastics.

Suitable metal materials for the production of monofilms or foils in a composite foil are ferrous metals, such as iron, galvanized iron or steel, as well as non-ferrous metals, like aluminum and its alloys. Aluminum foils are particularly preferred and its alloys. An aluminum with a purity of at least is appropriate 98.0%, appropriately 98.3%, advantageously 98.5% and in particular 98.6% used, the rest being 100% the accompanying impurities. Be further also preferably aluminum alloys of the AlFeSi, AlMnMg or AlFeSiMn type used.

The mono or composite films of the packaging containers can also be on carrier films applied ceramic or metallic layer with barrier effect against gases and Contain vapors. The layers can be outer cover layers or as intermediate layers be arranged within a composite film. The layers are special thin layers of a thickness of e.g. from 5 - 500 nm (nanometers). Ceramic layers can be made of silicon or aluminum oxides his. Metallic layers can e.g. made of iron and especially aluminum and its alloys. Carrier films are, in particular, plastic films Composite or mono film.

The thickness of the container wall is, for example, more than 20 μm, preferably more than 60 microns, especially more than 80 microns, and less than 500 microns, preferably less than 200 µm, especially less than 160 µm.

The packaging container can be made from a mono- or two-sided lacquer coated or composite film and in particular from a metal film coated on one or two sides consist.

The mono or composite film of a packaging container advantageously has at least one of its outer sides has a sealing layer in the form of a sealable film or sealing wax on. As intended, the sealing layer is in the outermost position of the composite structure arranged. The sealing layer expediently faces the packaging contents in order to to allow a lid to be sealed to the edge of the container. The sealable sealing layer is e.g. made of or contains polystyrene (PS), polyethylene (PE), polyamide (PA), such as PA 6, PA 66 or PA 12 or their copolymers and preferably polypropylene (PP) or their Copolymers or polyblends of polypropylene or polyethylene.

The surfaces of the films can be coated with adhesion promoters. The slides can furthermore to improve the adhesion of a corona, flame, plasma or ozone treatment be exposed and also have printing.

The packaging container is preferably a composite foil with an aluminum foil with a thickness of 60 µm - 160 µm, in particular 80 µm - 140 µm, and advantageously 90 µm - 130 µm. The aluminum foil expediently lies between an advantageously sealable plastic inner layer with high elasticity, facing the package contents, for example a foil consisting of or containing polypropylene, in particular one of the aforementioned polypropylenes, with a thickness of 10 μm to 90 μm, preferably 40 μm to 60 μm and in particular around 50 μm, and a plastic outer layer facing away from the packaging content made of a lacquer, for example a polyurethane lacquer or preferably an epoxy lacquer, for example a modified epoxy lacquer, the lacquer advantageously being stoved. The lacquer layer can be applied to the aluminum foil in a surface density of, for example, 2 to 9 g / m ² , in particular 3 to 5 g / m ² .

The plastic inner layer is in the outermost position facing the inside of the container and the plastic outer layer facing away from the inside of the container in the outermost position Layer.

The sealable plastic inner layer is connected to the aluminum foil, for example, by means of a plastic adhesive, such as polyurethane adhesive, which is applied with a surface density of 2-9 g / m ² , in particular 3-5- g / m ² .

[1] Lackschicht / Al 110/ PP 50,

[2] Lackschicht / Al 90 / PP 50,

[3] Lackschicht / Al 90 / PP 30,

[4] Lackschicht / Al 130 / PP 30,

wobei Al für Aluminium und PP für Polypropylen steht und die Ziffern für die Schicht- resp. Foliendicke in µm stehen, wobei die letztgenannte Schicht oder Folie jeweils die dem Verpackungsinhalt zugewandte, in äusserster Lage angeordnete Schicht oder Folie ist. Particularly preferred composite films for packaging containers according to the invention are listed below and have the following structure:

[1] lacquer layer / Al 110 / PP 50,

[2] lacquer layer / Al 90 / PP 50,

[3] lacquer layer / Al 90 / PP 30,

[4] lacquer layer / Al 130 / PP 30,

where Al stands for aluminum and PP for polypropylene and the digits for the layer or. Film thickness in microns are available, the last-mentioned layer or film in each case being the layer or film facing the packaging content and arranged in the outermost position.

In the present example, the plastic inner layer is a sealable PP layer and can be laminated or extruded onto the aluminum foil. The PP layer is preferably laminated onto the aluminum foil with a polyurethane adhesive with a surface density of 3 to 5 g / m ² . The paint layer is, for example, an epoxy resin.

The composite materials [1] and [2] are also under the brand name Steralcon® known.

The packaging container can for example have a height of e.g. 1 - 15 cm, especially from 1 - 10 cm, and an opening diameter of e.g. 1 - 30 cm, preferably from 4 - 20 cm and in particular from 5 to 15 cm.

The container edge of the packaging container contains an edge surface and one of the Edge surface protruding edge termination. The edge surface of the container edge is appropriate a flat or flat sealable or adhesive surface. The edge closure of the container edge is advantageous a projecting or protruding with respect to the wall thickness of the edge surface edge thickening or edge widening adjoining the edge surface. The Edge closure is preferably an edge flange, flange edge, rolled edge or mouth roll. The Edge trim can also be a border, a bead, a fold or an angle his. The edge can also be designed as a stack edge.

The edge flange, the flange edge, the rolled edge, the mouth roll or the edge bead has for example an oval or elliptical and preferably a circular one Cross section on. The edge finish is preferably done in a final processing step on the packaging container by rolling or flanging the outer edge section the edge surface. The edge finish and in particular as a rolled edge trained edge finish is very much due to the mechanical deformation and shaping stiff. As a result, the tear-open cover attached to the edge closure or by the edge clamping element attached to the edge termination, if necessary, to the edge termination exerted clamping forces, or tensile and compressive forces, without deforming the Edge closure to be transferred to this.

The cover film is preferably a flexible film and advantageously a monofilm Metal or plastic or a composite film, such as a multi-layer plastic film and in particular a metal-plastic composite film. The composite film can be one or contain several films made of the same or different thermoplastics. If necessary, the cover film can also contain cellulose-containing materials, such as cellophane, Cardboard or paper, contain or consist of.

The mono or composite films of the packaging containers can also be on carrier films applied ceramic or metallic layers with barrier effect against gases and Contain vapors. The layers can be outer cover layers or as intermediate layers be arranged within a composite film. The layers are special thin layers of a thickness of e.g. from 5 - 500 nm (nanometers). Ceramic layers can be made of silicon or aluminum oxides his. Metallic layers can e.g. made of iron and especially aluminum and its alloys. Carrier films are, in particular, plastic films Composite or mono film.

The cover film can be metal films made of one or more of the aforementioned metals and preferably contain a metal foil made of aluminum or an aluminum alloy or consist of it. The cover film can be films or layers of one or more of the contain or consist of the aforementioned thermoplastic materials.

The thickness of the cover film is, for example, more than 15 μm, preferably more than 40 µm, in particular more than 60 µm and less than 160 µm, preferably less than 130 µm, in particular less than 110 µm and advantageously less than 70 µm. Lid materials with cellulosic materials can have a thickness of, for example, 100-500 µm.

The cover film can, for example, be a mono- or lacquer coated on one or two sides Composite film and in particular a metal film coated on one or two sides.

The cover foils as mono or composite foils, in particular metal-plastic composite foils, advantageously have a sealing layer arranged on one or both sides in the outermost position in the form of, for example, a sealable film or a sealing wax. The sealing layer is expediently arranged in the outermost position of the cover film and the contents of the packaging facing to allow sealing to the edge of the container. The sealing layer e.g. made of or contains polystyrene (PS), polyethylene (PE), polyamide (PA), such as PA 6, PA 66 or PA 12 or their copolymers and preferably polypropylene (PP), in particular one of the aforementioned polypropylenes.

For the tear-proof connection between the cover film and the edge clamping element e.g. by means of Welding, heat sealing or pouring a molding compound shows that in the outermost position of the Cover film arranged and facing the packaging content, in particular Sealing layer, preferably a melting behavior based on the melting behavior the plastic of the edge clamping element is matched.

The cover film preferably consists of an aluminum-plastic composite with a aluminum foil coated on one or both sides with plastic. Particularly preferred are film composites with an aluminum foil and a sealable film or layer consisting of or containing polypropylene (PP), in particular one of the aforementioned polypropylenes, the sealable film or layer preferably in the outermost position of the Foil composite arranged and facing the packaging content. The other, preferably free outer side of the aluminum foil facing away from the packaging content with a further film or layer of plastic, in particular of polyethylene terephthalate (PET).

The thickness of the aluminum foil is, for example, 40-80 μm, preferably 50-70 μm. The thickness of the polypropylene film is, for example, 10-50 μm, preferably 20 μm. 40 µm. The thickness of the PET film which may be used can be 10-30 μm. The Film made of or containing polypropylene serves as a sealing layer and is expediently in outermost layer on the side of the film composite facing the interior of the container. The aforementioned Composite films are also known under the brand name Flexalpeel®.

The cover film can also contain an aluminum film and a plastic layer, in particular a lacquer layer, arranged on it in the outermost position and facing away from the packaging content. The paint can be, for example, a polyurethane or epoxy paint. The paint can also be baked. The lacquer can, for example, be applied to the aluminum foil in a surface density of, for example, 2 to 9 g / m ² , in particular 3 to 5 g / m ² .

The surfaces of the films can be coated with adhesion promoters. The slides can furthermore to improve the adhesion of a corona, flame, plasma or ozone treatment be exposed and also have printing.

The cover film has, for example, a diameter of 1-30 cm, preferably 4-20 cm, in particular 5 - 15 cm.

The metal foils and the thermoplastic plastics of the lid foil and the packaging container can e.g. by lamination, calendering or extrusion lamination Composite foils are put together. To connect the layers can occasionally Laminating adhesive can be applied. Adhesives can be used as lamination adhesives, for example Polyurethane (PUR) for use.

The edge clamping element is expediently made of plastic, preferably of a thermoplastic Plastic, in particular from a suitable for injection molding processing thermoplastic. The thermoplastic consists of or contains e.g. a plastic from the series of polyolefins, such as polyethylene (PE), e.g. PE lower Density (LDPE), medium density PE (MDPE), high density PE (HDPE) or the polypropylene, such as amorphous, crystalline, highly crystalline, isotactic or atactic polypropylenes, or cast polypropylene and copolymers and polyblends of polypropylene. Further suitable thermoplastics are from the range of polyesters, e.g. Polyethylene terephthalates (PET). Other suitable thermoplastic materials are polystyrenes (PS) and polyamides, such as PA 6, PA 66 or PA 12 or the copolymers and terpolymers of plastics mentioned above.

The edge clamping element preferably consists of or contains a polypropylene, in particular a cast (cast) polypropylene (cPP). The edge clamping element is preferably made of a polypropylene of the composition: 80% homopolymer and 20% copolymer.

The edge clamping element is, for example, by means of a plastic injection molding process manufactured.

The edge clamping element is advantageous by means of a material bond, such as gluing or plastic welding or heat sealing or by casting on one forming the edge clamping element Molding compound connected flat to the edge area of the cover film. In preferred The embodiment of the invention is the edge clamping element by means of a plastic injection molding process (injecting molding) cast directly on the edge of the cover film.

The area of overlap, i.e. the width of the connecting surface between the cover film and Edge clamping element is, for example, 1 - 10%, and preferably 1.5 - 6%, of the cover film diameter. The overlap area is, for example, 1-10 mm, preferably 1.5 - 5 mm, especially around 2 mm for a lid film with a diameter from 5 to 15 cm. The edge clamping element has a total width of 1-10, for example mm, preferably from 2 - 6 mm.

The edge clamping element runs in sections or in full, i.e. endless, along of the cover film edge, so that the cover film in sections or in its edge area is continuously provided with an edge clamping element. The lidding film forms a circular one Surface out, so the edge clamping element as an annular or partially annular Element be formed. Corresponds to the cover film of a square or rectangular Surface, the edge clamping element in plan view can be square or rectangular (Hollow) body be formed.

The edge clamping element advantageously forms a groove-shaped groove, which is thereby is distinguished by the fact that it partially, completely, or envelops the edge closure embraces.

The groove-shaped trough is expedient in relation to a horizontally oriented container opening, by an inner, first, preferably overlying the edge, and a second, adjacent to the first and angled with respect to this, preferably adjacent to the edge, limited leg. The two legs are preferably elastically or resiliently movable against each other. The first leg connects to the cover film, the flank of the free leg end to the cover film is oriented. The first leg forms with its groove facing away from the groove-shaped groove Expediently a partial or full surface bond with the cover film. The second leg is arranged on the outermost edge of the container edge and is preferred an elastic or flexible part of the edge clamping element. The second Thigh can towards its free end a rib-like directed against the groove-shaped groove Have thickening. Instead of ribs, the second leg of the edge clamping element also hump-like or hump-like under the edge Have cams which prevent the edge clamping element from sliding upwards should. The number of cams, which are preferably at equal distances from one another are arranged around the edge clamping element depends on the force to be applied, in order to hold the edge clamping element applied under tension over the edge termination. The edge clamping element can, for example, 3 to 30, preferably 3 to 20, and in particular 8 to 16, contain cams under the edge.

At its free end, the second leg can have further projections, for example in have the shape of a tear tab. The tear tab is used to tear off the lid from the packaging container along the detachable connection seam. The pull tab is appropriately angled from the second leg, for example angled by 45 ° to 135 °, and points away from the packaging container. The pull tab usually extends over a partial circumference of the tear-open cover, e.g. over a pitch circle of 10 - 30 ° to a full circle described by the entire circumference of the tear-open cover 360 °.

The groove-shaped channel expediently carries a cross-section which is adapted to the edge finish Geometry. The groove-shaped groove and the edge end advantageously form one mutually corresponding shape. The groove-shaped groove can For example, partially or completely form-fit the edge seal.

The groove-shaped groove is preferably trough-shaped or trough-shaped. The groove-shaped gutter can in particular have a part-circular cross section. The through the groove-shaped Channel with cross-section formed appropriately closes a central angle of more than 90 °, preferably more than 120 °, in particular more than 180 ° and less than 360 °, preferably less than 270 °, especially less than 240 °, based on a full circle of 360 °. The aforementioned formation of the groove-shaped Gutter is particularly suitable for gripping an edge flange, flange edge, rolled edge or ridges.

The edge clamping element is expediently in the closed state of the packaging slipped over the edge and partially or completely. Training of the edge clamping element as a groove-shaped, surrounded by a first and second leg Channel, among other things, causes a clip or pliers effect when gripping the Edge closure. The edge clamping element can only be pushed or - bend the outer leg raised from the edge of the container perpendicular to the opening of the container and be detached from the edge.

The edge clamping element can furthermore by means of a further effect, subsequently a tensioning effect called, are held over the edge. When completely slipping on of the edge clamping element along the edge of the container, the lid film is replaced by the red one Arrangement or configuration of the edge clamping element tensioned, so that the Edge clamping element is pulled towards the container opening, so that the second leg of the Edge clamping element fits snugly around the edge and grips under tension.

In the embodiment of the invention, the clamping effect of the edge clamping element can be carried out alone the clamping effect are triggered so that the edge clamping element e.g. no brackets or forceps to exert on the edge. In contrast, it can Edge clamping element can be designed in such a way that it works solely through the action of clips or pliers is held over the edge without any tension effect. Further can in a further embodiment of the invention clamping effect and clip or pliers effect be combined.

When the packaging is reclosed, the edge clamping element is slipped on The cover film is preferably stretched over the edge closure, so that the, if necessary through the first opening crumpled, folded or rolled lid film, smoothed is and the container opening and the edge surface lies flat.

Furthermore, the edge clamping element, in particular an endlessly surrounding the lid film edge Edge clamping element, an exciting and / or stiffening effect on the lid film exercise and thereby, for example, an essentially dimensionally stable tear-open cover train who e.g. after opening, especially opening the packaging for the first time, does not curl or fold.

With each further opening operation, the user only needs the edge clamping element either directly or indirectly via e.g. tear tab attached to the edge clamping element with your fingers while exerting an initial force and lifting the edge clamping element with the cover film across the container opening. For reclosing of the packaging container, the user only needs the cover film to place on the container opening and the edge clamping element using an initial force to slip over the edge, whereby the edge clamping element is appropriate if a critical pressing pressure is exceeded, suddenly pulls over the edge and is clamped fixed.

The above-described design of edge clamping element and edge termination can be exchanged accordingly and in relation to their functional effect. For example the edge closure, e.g. by means of clip, clip, snap or pincer effect, hold the edge clamping element of the cover film in a clamped manner, loosening the connection done using an initial force.

The edge finish can e.g. a groove-shaped groove, in particular a groove-shaped Form a gutter with undercuts, into which an in relation to the wall thickness of the Cover film formed as an edge-side thickening edge clamping element, in particular a bead-like edge clamping element, engages.

In a further embodiment of the invention, the edge clamping element continues of the first leg a partially or completely the edge surface of the container edge overlying flange with an underside of the edge surface and a free one Top. The underside of the flange of the edge clamping element forms with the edge surface a partial or full-surface, detachable, i.e. peelable, connecting seam. The flange can in particular be sealed, welded, glued or cast onto the edge surface. The cover film is to form a connection zone, preferably a non-detachable, i.e. non-peelable connecting seam, with the edge of the package contents facing section surface on the top of the edge clamping element, in particular applied to the top of the flange of the edge clamping element or the edge clamping element is with its top, especially with the top of its flange forming a connection zone, preferably a non-detachable, i.e. non-peelable, flat connecting seam, on the edge facing the packaging content Section surface of the cover film applied. The edge clamping element can on the The lid film must be sealed, welded, glued or cast, or vice versa.

To open the packaging for the first time, the edge clamping element with its outer The leg is detached from the edge of the container and the tear is applied using a tear force Flange of the edge clamping element with separation of the detachable connecting seam from the Edge surface of the container edge released. The edge clamping element is together with the preferably non-detachably attached to this, cover film with complete loosening the connecting seam between the edge clamping element and the container edge of the packaging container Cut.

The edge clamping element with the cover film is used to reclose the packaging put back on the packaging container and the edge clamping element over the edge finish put up.

The edge clamping element is used to manufacture the packaging e.g. to the edge of the The edge of the container is sealed, welded or glued. The edge clamping element can also using a plastic injection molding process (injecting molding) directly to the edge of the container be cast on or molded. In this case, the edge clamping element can only with the edge surface or with both the edge surface and with the edge termination a detachable, i.e. peelable adhesive bond.

Furthermore, the edge clamping element can also be made by means of the plastic injection molding process mentioned be cast or injection molded onto the edge of the cover film. The edge clamping element is preferably cast onto a plastic film of the cover film, which are made of the same plastic as the edge clamping element or their melting behavior is matched to the melting behavior of the plastic of the edge clamping element.

The packaging according to the invention with a reclosable tear-open lid can, for example Packaging containers in the form of cups, containers, trays, menu trays, for example with one or more compartments or tapestries for the intake of food, such as animal feed, milk products, e.g. Yogurt, whipped cream, sour milk, sour cream, Coffee cream, desserts, jams, ready-made salads, semi-or Include canned, pre-cooked or otherwise prepared dishes or drinks.

The packaging according to the invention from the packaging container and tear-open lid is required no other packaging. Thanks to the resealable packaging Packs for larger units are offered. The quality and design of the Edge clamping element, the bond between the edge clamping element and the cover film, and the quality of the lidding film itself, can be chosen so that some packaging Can be closed once or a few times, for example a maximum of one to five times can, whereby in the latter case it is consciously accepted that the tear-open cover or the edge of the container is damaged if it is closed and opened too often, or gets destroyed.

The packaging according to the invention can be produced in that a packaging container with a container edge, containing an edge surface and an edge closure, with the Package contents loaded and with a tear-off lid, containing a lid film and an edge clamping element is closed, the edge clamping element on the container edge applied and by means of positive and / or non-positive connection with the edge closure is connected, and the edge region of the cover film or the edge clamping element with the formation of a detachable connecting seam over part or over the entire surface with the edge surface of the packaging container is connected.

The packaging container is preferably by means of stretch-drawing or deep-drawing processes or a combination of both processes. The edge of the container is at its extreme Edge area preferably rolled up to a flanged edge.

In an embodiment of the invention, the cover film is made from a tape film, in particular from a film roll, cut. An edge clamping element made of plastic is appropriate in the edge area of the cover film, preferably by means of injection molding, to the cut one Cover film glued or cast so that the cover film with the edge clamping element, after hardening of the liquid to plastic poured on the cover film Plastic, forms a cohesive connection.

For this purpose, the cover film is advantageously introduced into an injection mold, the edge area the cover film is arranged in the wall area of a mold cavity and is thermoplastic Plastic is injected into the mold cavity and the injected thermoplastic Plastic glued to the surface of the edge area and then into one Edge clamping element is cured.

The edge clamping element is preferably cast onto a plastic film of the cover film, which are made of the same plastic as the edge clamping element or their melting behavior matched to the melting behavior of the plastic of the edge clamping element is.

In a preferred embodiment of the method, the edge clamping element is made of or containing Polypropylene to or formed from a film or layer formed as a sealing layer Polypropylene is poured onto the lidding film so that the sealing layer of the lidding film and the edge clamping element form a material bond from the same plastic.

In a further embodiment of the invention, the edge clamping element is made by means of an injection molding process molded or molded onto the edge of the container. For this, the packaging container advantageously inserted into an injection mold, the edge of the container and in particular whose edge surface is arranged in the wall area of a mold cavity. A thermoplastic Plastic is injected into the mold cavity, the injected thermoplastic Plastic with the surface of the edge surface, or the edge surface and the edge closure, releasably glued and then cured to form an edge clamping element.

In an alternative embodiment, the pre-fabricated edge clamping element is shaped and / or non-positively placed over the edge termination and preferably subsequent to it sealed, welded or welded onto the edge of the container, in particular onto the edge surface glued.

As a continuation of the packaging process, the packaging containers with the applied Edge clamping element, in particular with a molded, welded, sealed or glued edge clamping element, loaded with the package contents and then closed with the cover film, the, preferably already cut Cover film on the edge clamping element, in particular on the top of the the edge of the flange of the edge clamping element, sealed, welded or is glued. The edge clamping element can also only after loading the packaging container be attached to the package contents, in particular to these are sealed, welded or glued.

Furthermore, in a first step, the edge clamping element can form the shape and / or frictional connection with the edge closure placed on the container edge become. Both the cover film and the edge clamping element are sealed, whereby the edge clamping element only when sealing the after filling the packaging container applied lid film is sealed to the edge clamping element on the edge of the container. The two sealing processes are preferably carried out at one station. The lidding film and the edge clamping element are preferred by applying pressure and / or heat sealed to the adjacent packaging element at the same time.

In the following, the invention will be illustrated by way of example and with reference to FIGS. 1, 2 and 3 executed, Figure 1 shows a schematic section through the cross section in Edge area of a packaging according to the invention and FIG. 2 shows a schematic section through the cross section of two stacked tear-open covers. Figure 3 shows one Another embodiment variant of a packaging according to the invention.

The packaging 10 contains a packaging container 1 and a tear-open cover 2, consisting of from a cover film 3 and a molded onto this via an injection molding connection 15 Edge clamping element 4 (Fig. 1). The packaging container 1 contains a container edge 11, consisting of a flat edge surface 12 as a sealing surface and one to the Edge surface 12 adjoining and projecting from this edge finish 13 in the form of a cross-sectionally circular flanged edge 13. The cover film 3 is over a sealing seam 14 sealed onto the edge surface 12.

The area of overlap, i.e. the width of the injection molding connection 15 between the cover film 3 and edge clamping element 4 is, for example, 1-5 mm, in particular by 2 mm.

The container edge 11 has a width of the edge surface 12 of 2-10 mm, in particular of 4 - 6 mm, and contains a flanged edge 13 with a width of 2-7 mm, in particular around 4 mm.

The edge clamping element 4 has a groove-shaped groove 7 which defines the flange edge 13 grips like pliers (see also Fig. 2). The groove-shaped channel 7 is replaced by a first inner, the flanged edge 13 resting leg 5 and a second, outer, the Flanged edge 13 adjacent leg 6 formed. The second leg 6 has in its lower End section a rib 8 under the flanged edge 13, which slipping of the edge clamping element 4 in the direction x, i.e. in the container opening direction.

Furthermore, a tear tab 17 is formed on the end portion of the second leg 6. The tear tab 17 is formed on the second leg 6 in such a way that a gradation 16 is formed. The tear tab 17 serves to tear off the cover film 3 along the sealing seam 14. The tear tab 17 also contains a roughness pattern for the better Griffs with your fingers. The tear tab 17 usually extends over one Partial circumference of the tear-open cover 2, e.g. over a pitch circle of 10 - 30 °, related to one described by the total circumference of the tear-open cover 2 full circle of 360 °.

The edge clamping element 4 also contains an indentation 9 on the edge, which is connected to the Shape of the leg or rib underside 19 corresponds, so that by placing the Leg or rib underside 19a of an identical, upper tear-open cover 2a on the Indentation 9 of a lower tear-open cover 2, the tear-open covers 2, 2a stackable one above the other are, the tear-open covers 2, 2a can be separated again without any problems (Fig. 2).

The packaging container 1 has a height of around 1-10 cm. The cover film 3 has a diameter of around 5 - 15 cm.

The packaging 10b of a further embodiment contains a packaging container 1b and a tear-open cover 2b, consisting of a cover film 3b, which with its edge-side section surface with formation of a connection zone in the form of a non-releasable, flat connection seam 15b by means of sealing, gluing or welding onto the Top of a flange 20b is applied to the edge clamping element 4b (Fig. 3). The packaging container 1b contains a container edge 11b consisting of a flat edge surface 12b as a connecting surface and one adjoining the edge surface 12b and from it projecting edge termination 13b in the form of a cross-sectionally circular flange edge 13b.

The edge clamping element 4b is under construction with the underside of its flange 20b a detachable, i.e. peelable, connecting seam 14b sealed to the edge surface 12b, glued, welded or cast on.

The area of overlap, i.e. the width of the flange 20b and the connection surface between cover film 3b and edge clamping element 4b or edge clamping element 4b and Edge area 12b is, for example, 1-5 mm, in particular around 2 mm. The edge surface 12b measures a width of 2-10 mm, in particular 4-6 mm.

The edge clamping element 4b has a groove-shaped groove 7b which defines the flange edge 13b grips like pliers (see also Fig. 2). The groove-shaped channel 7b is replaced by a first inner, the flanged edge 13b resting leg 5b and a second, outer, the Flanged edge 13b adjacent leg 6b formed. The second leg 6b has in its lower end section engaging the flanged edge 13b at regular intervals from one another arranged bump-shaped cams 8b, which prevent the edge clamping element from slipping 4b in the direction x, i.e. in the container opening direction.

Furthermore, a tear tab 17b is formed on the end portion of the second leg 6b. The tear tab 17b is molded onto the second leg 6b in such a way that a gradation 16b is formed. The tear tab 17b serves to tear off the edge clamping element 4b from the edge surface 12b along the sealing seam 14b. The tear tab 17b also includes a roughness pattern for better finger grip. The pull tab 17b usually extends over a partial circumference of the tear-open cover 2b, e.g. over a pitch circle of 10 - 30 °, based on one of the entire circumference of the tear-open cover 2b described full circle of 360 °.

The edge clamping element 4b also contains an indentation 9b on the edge, which is connected to the Shape of the leg or rib underside 19b corresponds, so that the individual Have the tear-open cover stacked (see also Fig. 2 and the associated description).

The packaging container 1b has a height of around 1-10 cm. The cover film 3b has a diameter of around 5 - 15 cm.

Claims (27)

Packaging (10), in particular for foodstuffs, containing a packaging container (1) with a container edge (11) surrounding the container opening and a tear-open lid (2) placed over the container opening,
characterized in that
the tear-open cover (2) consists of a cover film (3) and an edge clamping element (4) attached to the cover film (3) endlessly or in sections to form a releasable or non-releasable connection zone (15, 15b), and the container edge (11 ) contains an edge surface (12) with an end edge (13) at the end, and the tear-open cover (2) with its cover film (3) and / or with the edge clamping element (4) to form a releasable connecting seam (14, 14b) on the edge surface ( 12) and the edge clamping element (4) enters into a positive and / or non-positive connection with the edge termination (13), the packaging (10) by releasing the positive and / or non-positive connection between the edge clamping element (4) and edge termination (13) and Tear open the detachable connecting seam (14, 14b) on the edge surface (12) for the first time and the packaging container (10) by re-attaching the tear-open cover (2) to the container opening and manufacture The positive and / or non-positive connection between the edge clamping element (4) and the edge termination (13) can be closed again or once. Packaging according to claim 1, characterized in that the edge clamping element (4) slipped over the edge finish (13) or placed on the edge finish (13) and clinging to it. Packaging according to one of claims 1 to 2, characterized in that the Edge clamping element (4) a plastic, in particular a thermoplastic contains or consists of, and the edge clamping element (4) the edge termination (13) contains at least partially receiving groove-shaped groove (7), and the groove-shaped groove (7) at least partially in cross-section to the edge termination (13) has corresponding geometry and preferably with the edge termination (13) a positive and / or non-positive connection is established, and the positive and / or non-positive connection, in particular by means of a clamp, pliers, clamping , Snap or clip effect, or a combination thereof. Packaging according to one of claims 1 to 3, characterized in that the Edge clamping element (4) by an inner, first leg (5) and one to the connecting the first leg (5) and angling it relative to this, second leg (6) limited groove-shaped groove (7) for receiving the edge termination (13), and the edge termination (13) with respect to the wall thickness of the edge surface (12) is an edge widening, and the edge clamping element (4) clamping over the Edge termination (13) is slipped, the edge clamping element (4) the edge termination (13) partially or completely encased and the edge termination (13) in the groove-shaped Channel (7) comes to rest. Packaging according to one of claims 1 to 4, characterized in that the Edge termination (13) is a rolled edge, flanged edge or a mouth roll and the channel-shaped Groove (7) is trough-shaped or trough-shaped and the rolled edge, flanged edge or the Partially or completely form-fitting mouth roll. Packaging according to one of claims 1 to 5, characterized in that the Edge clamping element (4) surrounds the edge termination (13) and only under Bending away the outer, second leg (6) from the container edge (11) perpendicular to Container opening can be raised. Packaging according to one of claims 1 to 6, characterized in that the Edge clamping element (4) is formed on the end of the outer, second leg (6) Contains rib (8) which encloses the edge termination (13) below. Packaging according to one of claims 1 to 6, characterized in that the Edge clamping element (4) at the end on the outer, second leg (6) the edge termination (13) subordinate to each other arranged at regular or irregular intervals Has cams (8b), in particular hump-shaped or hump-shaped cams. Packaging according to claim 1, characterized in that the edge closure by means of Clip, clip, snap, or pinch effect, or a combination thereof Edge clamping element of the cover film holds tight and the edge closure preferably a groove-shaped groove, in particular a groove-shaped groove with undercuts forms in which a in relation to the wall thickness of the cover film as edge-side thickening formed edge clamping element, preferably a bead-like trained edge clamping element, engages. Packaging according to one of claims 1 to 9, characterized in that the packaging container (1) from an aluminum-plastic composite film, a plastic composite film or an aluminum foil coated on one or both sides with a lacquer Thickness of more than 20 microns, preferably more than 60 microns, especially more than 80 microns and less than 500 µm, especially less than 200 µm, especially less than Is 160 µm. Packaging according to one of claims 1 to 10, characterized in that the Cover film (3) a one or both sides coated with a thermoplastic, sealable aluminum foil, preferably one with a sealing layer or containing polypropylene coated aluminum foil with a total thickness of more than 15 μm, preferably more than 40 μm, in particular more than 60 μm, and less less than 500 µm, preferably less than 160 µm, especially less than 130 µm, is. Packaging according to one of claims 1 to 11, characterized in that the Cover film (3) one arranged in the outermost position and facing the packaging contents Sealing layer, preferably a sealing layer made of or containing polypropylene, contains and the edge clamping element (4) a thermoplastic, preferably Polypropylene, contains or consists of and by means of material bond, preferably is connected to the cover film (3) by means of a welded or sealed connection. Packaging according to one of claims 1 to 12, characterized in that the Cover film (3) one arranged in the outermost position and facing the packaging contents Contains sealing layer or film made of a thermoplastic and the edge clamping element (4) consists of a thermoplastic, and the Sealing layer preferably has a melting behavior that depends on the melting behavior of the edge clamping element is matched. Packaging according to one of claims 1 to 13, characterized in that the Edge clamping element (4) in the edge region of the cover film (3), preferably on one sealing layer arranged in the outermost position, in particular on a sealing layer or containing polypropylene, by means of a casting, preferably injection molding process, molded part made of a thermoplastic, preferably made of or containing Polypropylene. Packaging according to one of claims 1 to 13, characterized in that the Cover film (3b) with its edge area (12b), preferably by means of sealing, gluing or welding, forming a releasable or non-releasable connection zone (15b) on the edge clamping element (4b) and the edge clamping element (4b), preferably by means of sealing, gluing, welding or casting, with the formation of a detachable, flat connection seam (14b) partially or completely with the container edge (11b), in particular with the edge surface (12b). Packaging according to claim 15, characterized in that the edge clamping element (4b) contains a flange (20b) formed in the extension of the first leg (5b) and the edge clamping element (4b) with its flange (20b) to form a detachable connecting seam (14b) lies partially or over the entire surface of the edge surface and the Cover film (3b) with the top of the edge clamping element (4b), in particular with the Top of the flange (20b), a releasable or non-releasable connection zone (15b) trains. Packaging according to one of claims 15 to 16, characterized in that the Edge clamping element (4b) on the container edge (IIb) by means of a casting, preferably Injection molding process, molded or molded part made of a thermoplastic Plastic, preferably made of or containing polypropylene. Packaging according to one of claims 15 to 17, characterized in that the Edge clamping element (4b) is applied to a sealing layer on the container edge (11b). Method for producing a packaging according to claim 1,
characterized in that
a packaging container (1) with a container edge (11), containing an edge surface (12) and an edge closure (13), loaded with the packaging content and closed with a tear-open cover (2) containing a cover film (3) and an edge clamping element (4) the edge clamping element (4) is applied to the container edge (11) and is connected to the edge closure (13) by means of a positive and / or non-positive connection, and the edge region of the cover film (3) or the edge clamping element (4) to form a detachable one Connecting seam (14) is partially or fully connected to the edge surface (12) of the packaging container (1). A method according to claim 18, characterized in that the packaging container (1) using stretch-drawing or deep-drawing processes or a combination of both processes is produced and the container edge (11) in its outermost edge area to one Flanged edge is rolled up as the edge finish (13). Method according to one of claims 19 to 20, characterized in that a Cover film (3) cut from a tape film, in particular from a film roll and an edge clamping element (4) made of plastic in the edge area of the cut Cover film (3) is cast onto the cover film (3) by means of injection molding, so that the cover film (3) with the edge clamping element (4), after the in liquid to plastic state on the cover film (3) cast plastic, a forms an integral connection. Method according to one of claims 19 to 21, characterized in that the cover film (3) is inserted into an injection mold, the edge region of the cover film (3) is arranged in the wall area of a mold cavity and thermoplastic Plastic is injected into the mold cavity and the injected thermoplastic Plastic glued to the surface of the edge area and to an edge clamping element (4) is cured. Method according to one of claims 19 to 20, characterized in that the Edge clamping element (4b), preferably with the formation of the positive and / or non-positive connection with the edge closure (13b) attached to the container edge (11b) is, and the packaging container (1b) before and preferably after attaching the Edge clamping element (4b) is loaded with the packaging content, and which, preferably cut, cover film (3b) for closing the filled packaging, preferably by means of sealing, welding or gluing, with the formation of a preferably non-detachable connecting seam (15) on the on the packaging container (1b) adjacent edge clamping element (4b) is applied and the edge clamping element when applying to the container edge (11b) or when attaching the lid film (3b) forming a detachable connecting seam (14b), preferably by means of seals, Welding, gluing or casting on, with the container edge (llb), in particular with whose edge surface (12b) is connected. A method according to claim 23, characterized in that the edge clamping element (4b) attached to the container edge (11b) and with the container edge (11b), in particular with its edge surface (12b), forming a releasable connecting seam (14b), preferably by means of sealing, welding, gluing or casting and the packaging container (1b) before and preferably after attaching the Edge clamping element (4b) is loaded with the packaging content and the cover film (3b) for closing the filled packaging, preferably by means of seals, Welding or gluing, forming a releasable or non-releasable area Connection zone (15b) is applied to the edge clamping element (4b). A method according to claim 23, characterized in that the edge clamping element (4b) with the formation of the positive and / or non-positive connection with the edge closure (13b) is attached to the container rim (llb), and the packaging container (1b) before and preferably after attaching the edge clamping element (4b) with the Package contents are loaded, and the lid film (3b) to close the filled Packaging, preferably by means of sealing, welding or adhesive training a detachable or non-detachable, flat connection zone (15b) on the edge clamping element (4b) applied to the packaging container (1b) is applied and the edge clamping element (4b) when attaching the cover film (3b) with training a detachable connecting seam (14b) preferably by means of sealing, welding or gluing with the container edge (11b), in particular with its edge surface (12b), is connected. A method according to claim 23, characterized in that the edge clamping element (4b) with the formation of a detachable connection (14b) by means of a plastic injection molding process to the container edge (11b), in particular to its edge surface (12b), is cast on, and the container edge (llb), in particular its edge surface (12b) with the edge clamping element (4b) after curing in the liquid to plastic state on the container edge (llb) cast plastic, a detachable, material connection Connection forms. A method according to claim 26, characterized in that the packaging container (1b) is inserted into an injection mold, the edge of the container (11b), and in particular the edge surface (12b) is arranged in the wall area of a mold cavity, and a thermoplastic material is injected into the mold cavity, the injected thermoplastic with the surface of the container rim (11b), in particular the edge surface (12b), glued to form a releasable connection (14b) and is hardened into an edge clamping element (4b).

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