WO2008011644A1 - Lid for closing containers - Google Patents

Abstract

The invention relates to a lid (1) for closing containers (9) comprising a carrier material (4), a sealing layer (6) and an edge (3), wherein at least part of the edge (3) has a reinforcement (2). On account of this reinforcement, a user-friendly solution for avoiding tearing of the lid (1) when the pack (12) is opened has been found, without necessitating extra material costs and more complicated production steps.

Description

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Cover for closing containers

The invention relates to a lid for closing containers comprising a carrier material, a sealing layer and an edge.

The carrier material, such as aluminum, should give the lid the necessary strength and in combination with the

Seal layer protection of the packaged goods, especially against the

Ingress of moisture or contamination such as bacteria.

The sealing lacquer used in the sealing layer serves to form a so-called sealing zone in the region of the container edge. The applied sealing wax is activated by applying pressure and heat, so that a firm closure between edge of the container and lid is achieved.

Equally, however, it should be possible for the consumer without additional tools to easily detach the lid from the container without the lid tearing. Namely, even for process-economic reasons, the material thickness of the carrier material is reduced, so this danger increases, so that the lid after opening the container is almost unusable.

This is especially for lids for closing containers for sensitive packaged goods, such as dairy products, disadvantageous, especially if this is not consumed to the whole. The invention aims to remedy this situation.

According to the invention, a cover of the type mentioned is proposed, which is characterized in that there is a reinforcement at least in a part of the lid edge. Advantageously, this reinforcement is in the form of a folded-over region of the edge of the lid, it being possible, on the one hand, to open the turned-over area to the outside, that is to say to the consumer, or else to the inside, i. to the seal layer, align.

Further advantageous embodiments of the inventive lid are disclosed in the dependent claims. The invention further relates to a package consisting of a container and the lid according to the invention, wherein this is sealed to the Behalterrand.

Further advantageous embodiments of the inventive package are disclosed according to subclaims. The invention will be described below with reference to FIGS. 1 to 6 -. - explained in more detail, wherein Fig. 1 shows the lid according to the invention with an outwardly turned-over area, and Fig. 2 shows a pack which consists of a container and such a lid shows. FIG. 3 shows a further embodiment of the lid according to the invention, wherein the turned-over area points to the sealing layer. Fig. 4 shows a pack consisting of a container and this lid. 5 and 6 show a further possible embodiment of the cover according to the invention, wherein the reinforcement in the area of the grip tab is provided in the form of bent regions.

The invention will be explained in more detail below with reference to possible embodiments for carrying out the invention.

For producing the lid 1 according to the invention, an aluminum foil having a thickness of 30 to 50 μm is used as the carrier material 4, which is provided on its inside with a heat sealing lacquer 6. The carrier material 4 may be in a smooth or embossed form. On the outside of the carrier material 4, i. On the side facing the consumer, a printing lacquer layer 5 is provided, which can reproduce essential information for the consumer, such as, for example, the content and type of the packaged goods.

From the carrier material 4 thus prepared, the cover 1, for example, with a kind of quadrangular dimensioning as shown in Fig. 1, punched out in the sequence, wherein at the same time a gripping tab 7 is provided.

In the course of the sealing process filled containers 9 are closed with the lid 1. In this case, the sealing zone 11, which represents the connection between Behalterrand 10 and 1 cover formed. In one are produced with conventional shaping tools, such as dies and patricks, the folded areas 2, 2 'and 2' 'as reinforcement on the edge 3. The folded-over region 2, as shown according to embodiments according to FIGS. 1 and 2, can be bent over to the printing lacquer side 5. If this impairs the appearance for the consumer, however, it is equally possible, as shown in FIGS. 3 and 4, to align the folded-over region 2 'as reinforcement in the edge 3 (not shown) to the sealing layer 6.

In any case, the folded-over region 2, 2 'is to be present in an advantageous manner in the region of the container edge 10, but not in the region of the sealing zone 11. This is to avoid unnecessary To avoid procedural steps, such as partial attachment of the sealing wax. Finally, only the material strength is to be increased by the folded-over region 2, 2 ', so that when the consumer touches the grip tab 7 to open the package 12 and discharges in the direction of the arrow 8 from the sealing zone, a tearing, in particular in those of Grip bottle 7 adjacent areas of the lid, is avoided.

Since the reinforcement of the cover according to the invention is provided in a marginal area of material, unnecessary additional costs in the production of the cover can also be avoided.

Thus, it is particularly advantageous to provide a materialmaßige reinforcement in the region of the edge 3 of the lid 1 when the areas 2 '' are bent in the vicinity of the grip tab 7, see Fig. 6. Since the gripping flanges adjacent areas of the lid particularly exposed to high forces when opening (Schalkraften), the embodiment shown in Fig. 6 represent a consumer-friendly solution, while avoiding that the relatively thin, made of aluminum lid, especially in the vicinity of the gripping tab 7, tear. Namely, if it is possible for the consumer to perform the opening operation without damaging the lid 1, this lid can be used to partially seal the package even after partial removal of the packaged goods. From a process engineering point of view, the lids are punched in the mold shown in FIG. 5. In this case, the dimensioning of the areas 2 '' is taken into account, so that additional work steps, such as a separate shaping unnecessary.

In summary, it can be said that a consumer-friendly solution was found by the cover according to the invention due to a reinforcement, which is present at least in part of the lid edge 3, to avoid the tearing of the lid 1 when opening the package 12, without material additional costs and more elaborate manufacturing steps are necessary.

Claims

- -Claims : 1. lid (1) for closing containers (9) comprising a carrier material (4), a sealing layer (6) and a rim (3), characterized in that the lid (1) at least in a part of the edge (3) a gain (2, 2 ', 2' '). 2. Lid according to claim 1, characterized in that the reinforcement (2, 2 ', 2' ') is formed by turning over the lid edge (3). 3. Lid according to claim 2, characterized in that the folded-over area (2) is directed outwards. 4. Lid according to claim 2, characterized in that the folded-over area (2 ') is directed to the sealing layer (6). 5. Lid according to one of claims 1 to 4, characterized in that within the edge (3) an opening aid, preferably a gripping tab (7), is provided. 6. Lid according to claim 5, characterized in that on the grip tab (7) as reinforcement folded areas (2 ¹ '), which are aligned to the sealing layer (6) are present. 7. Pack (12) consisting of a container (9) and a lid (1), wherein the lid (1) is sealed to the container edge (10), characterized in that the lid (1) according to one of claims 1 to 6 is trained. 8. A package according to claim 7, characterized in that the turned-over areas (2, 2 ', 2' ') of the lid edge (3) are narrower than the Behalterrand (10). 9. A package according to claim 8, characterized in that the folded regions (2, 2 ', 2' ') of the lid edge (3) outside the sealing zone (11).