DE102020124015A1 - Packaging device for producing packaging units, packaging unit and a method for producing packaging units - Google Patents

Abstract

The invention relates to a packaging device (1) for producing packaging units (40), a packaging unit (40) and a method for producing packaging units (40). The packaging units (40) comprises at least two articles (30), the articles (30) are at least partially encased by a flat packaging blank (20) made of paper or comprising paper.The packaging device (1) comprises a dividing module for dividing articles (30) into article groups (31); a packaging module (3) for at least regionally covering the article groups (31) with the packaging blank (20), at least one feed device for feeding a packaging material (21) forming the packaging blank (20) or the packaging blank (20) to the packaging module (3) and at least an application module (12) assigned to the feed device, which is designed to equip the packaging material (21) or the packaging blank (20) at least in regions with at least one reinforcing element (22) made of paper or cardboard.

Description

The present invention relates to a packaging device for producing packaging units, a packaging unit and a method for producing packaging units according to the features of the independent claims.

There are different types of packaging for the processing, assembly, grouping and packaging of articles such as beverage containers, for example the combination of articles or containers into portable, relatively handy packaging units. Here, too, various possibilities are known for combining individual articles into larger containers. For example, beverage containers are usually combined and packaged using shrink films to form bundles of four, six or more containers. The production of containers is usually unavoidable, as they represent the most common variant of sales units for beverage containers or bottles made of PET plastic. Some of the containers are combined again for transport and/or put together in layers and palletized.

In the production of known types of containers, specific production steps are required in order to be able to process the shrink films that are usually used. These production steps require a relatively large amount of energy. In addition, the shrink film used causes costs for production, provision, handling and subsequent disposal, since it is no longer required after sale. This is also problematic in particular with regard to environmental pollution. The machinery for providing the so-called film wrapping modules and other handling stations also causes high investment costs. Finally, the provision of the so-called shrink tunnel, in which the shrink film wrapped around the container is shrunk around the container by means of the application of hot air, also requires a relatively high capital investment. In addition, the use of shrink film is problematic from the point of view of environmental protection.

A device which is also suitable for the use of paper foil and by means of which packaging units can be produced in particular without lateral foil eyes is disclosed in the patent specification EP 2 704 949 B1 described. In this case, groups of objects are wrapped with a film, forming a film flap and protruding folding flaps. The folding flaps are applied to the packaging unit formed in this way and fixed to one another, forming a film wrapper that is closed on all sides.

The object of the present invention is to produce a stable packaging unit, in particular a packaging unit that dispenses with the use of plastic as secondary packaging or in which at least the use of plastic as secondary packaging is reduced.

The above object is achieved by a packaging device for producing packaging units, a packaging unit and a method for producing packaging units, which include the features in the independent patent claims. Further advantageous configurations are described by the dependent claims.

The packaging units to be produced using the packaging device described below and the method described below each comprise at least two articles which are at least partially encased by a first flat packaging blank made of paper or comprising paper and are thus combined as a packaging unit or bundle.

In particular, the packaging blank covers the tops and bottoms of the articles and at least areas of the outer lateral surfaces of the articles.

The items are preferably drinks containers, in particular bottles made of PET or another suitable plastic or cans made of plastic and/or aluminum or the like. However, the packaging device is also suitable for combining other suitable items with a corresponding packaging blank as packaging units or bundles . At least two identically designed articles can be provided as a group of articles to produce the packaging units. So-called mixed bundles can be created by putting together differently designed articles.

The packaging device comprises a divider module or another suitable grouping device, in which the articles are combined into article groups in a suitable number and arrangement. The items are fed to the divider module, for example, in an ordered or unordered mass flow.

In a packaging module, the article groups are at least partially wrapped with the packaging blank and/or wrapped in the packaging blank. In particular, the packaging module is a wrapping module, such as that shown in the prior art known in the art in connection with the manufacture of shrink wraps.

The packaging material from which the packaging blank is formed, or the packaging blank that has already been cut to length, is fed to the packaging module via at least one feed device. An application module is assigned to the feed device, which is designed to equip the packaging material forming the packaging blank or the packaging blank, at least in regions, with at least one reinforcing element made of paper or cardboard.

A reservoir or magazine for the flat packaging material, for example a paper roll, is preferably assigned to the packaging module. Flat packaging material is unrolled from the reservoir. By means of a separating station arranged between the reservoir and the packaging module, which has at least one cutting means or a perforating means, in particular a cutting knife or a perforating knife, packaging blanks are separated from the endless supply in the desired length. These can now be fed via the at least one feed device to the packaging module, to which the previously formed article groups are also fed.

The application module can be arranged in particular before or after the separating station, i.e. the packaging blank can be equipped with a reinforcing element before or after the packaging blank has been cut to length from the packaging material.

Alternatively, packaging blanks of the appropriate size can also be provided stacked one on top of the other in a magazine and removed from it, for example by means of a vacuum suction device or another suitable removal device, and fed to the packaging module.

The groups of items are placed within the packaging module at least partially on a leading end portion of the at least partially reinforced package blank and the remainder of the package blank is wrapped around the items.

In particular, the at least partially reinforced packaging blank has a length that is designed accordingly. so that the packaging blank can be guided completely around the article group. It is preferably provided that the articles of the article group are arranged at least partially on the trailing end area of the packaging blank. In particular, it is provided that at least some of the items in the item group are arranged on a so-called overlapping area, which is formed in particular by the trailing end area of the packaging blank and the leading end area of the packaging blank arranged above.

The packaging unit formed in this way can also have laterally protruding areas of packaging material which—as will be described below—can also be folded, for example, in order to form an all-encompassing outer packaging from the packaging blank.

The group of articles wrapped in this way with the partially reinforced packaging blank forms the packaging unit.

In particular, it is provided that the packaging blank has an inside that rests against the articles and an outside that forms the outer lateral surface of the packaging unit. The at least one reinforcement element is preferably arranged on the side of the packaging material or packaging blank which forms an inner side in the finished packaging unit, which in particular bears against the articles. This has the advantage that a lower quality paper or cardboard material can be used for the reinforcement element, for example recycled paper or the like, since this is not visible in the complete packaging unit.

In general, different thicknesses of paper or cardboard material can be used as a reinforcement element, in particular depending on the corresponding stress of the area of the packaging unit in which the reinforcement element is placed. In addition, printed packaging blanks are often used, which contain helpful information or the like for the consumer or buyer of the packaging units. These are therefore not covered when the reinforcement element is applied to the non-visible inside.

The at least one reinforcement element can be arranged in different areas on the packaging blank, so that in the finished packaging unit, in particular the bottom side and/or the top side and/or edges and/or side surfaces of the packaging unit are reinforced at least in some areas.

Through the targeted reinforcement of the packaging blank in particularly stressed areas of the packaging unit, a The material thickness of the packaging blank used can be reduced, ie paper webs with a low paper thickness can be used for the packaging blank.

The reinforcing element can be glued to the packaging blank at the appropriate point or attached to it in some other way, for example with a welded joint or the like. This represents a useful attachment of the reinforcement element to the packaging blank, particularly when the reinforcement elements are placed in an area which subsequently forms the top, an upper edge or a side surface of the packaging unit.

When placing a reinforcement element in the leading end area of the packaging blank, which subsequently forms a partial area of the bottom side of the packaging unit, it may be sufficient if the reinforcement element is placed on the packaging blank.

An alternative embodiment can provide for the leading end area of the packaging blank to be at least partially folded in, so that an area with at least two layers is formed, on which the articles are placed in connection with the wrapping.

According to one embodiment of the invention, it is provided that the application module includes a magazine for reinforcement elements. These are removed from the magazine by a suitable gripper, for example a vacuum suction cup or the like, and placed at the appropriate point on the packaging blank and, if necessary, fixed to it by gluing, welding or the like.

Alternatively, it can be provided that the application module is assigned a magazine or reservoir of reinforcement material and a device for forming a reinforcement element from the reinforcement material. For example, reinforcement material can be provided in the form of a continuous roll of paper. The reinforcement elements are cut off the paper roll in the desired size and/or shape with a suitable cutting device and placed on the packaging blank.

For example, one embodiment can provide for the use of a plurality of endless paper rolls, each of which provides paper or cardboard of different thicknesses, so that reinforcing elements of different thicknesses can be provided and applied to the packaging blank.

Furthermore, it can be provided that at least one sensor for detecting parameters of the packaging blank and/or the reinforcement element is assigned to the application module. In particular, a corresponding sensor system can monitor the correct placement of the at least one reinforcement element on the packaging blank. A camera with appropriate image evaluation is suitable for this, for example, but other suitable sensors can also be used.

If the at least one reinforcement element is glued onto the packaging blank, the packaging device comprises at least one suitable adhesive device with which adhesive is applied to the reinforcement element and/or the packaging blank in order to fix them to one another via an adhesive bond.

An alternative embodiment can provide for the fastening to take place via welding or other suitable methods or fastening means.

It should be expressly mentioned at this point that all aspects and design variants that have been explained in connection with the device according to the invention equally relate to or can be partial aspects of the method according to the invention. Therefore, if certain aspects and/or connections and/or effects are mentioned at one point in the description or also in the definition of claims for the device according to the invention, this applies equally to the method according to the invention. The same applies in reverse, so that all aspects and design variants that have been explained in connection with the method according to the invention equally relate to or can be partial aspects of the device according to the invention. Therefore, if certain aspects and/or connections and/or effects are mentioned at one point in the description or also in the claim definitions for the method according to the invention, this applies equally to the device according to the invention.

• 1 zeigt eine erste Ausführungsform eines teilweise verstärkten Verpackungszuschnitts, wie er zur Herstellung einer erfindungsgemäßen Verpackungseinheit Verwendung finden kann.
• 2 zeigt eine erste Ausführungsform einer Verpackungsvorrichtung zur Herstellung einer erfindungsgemäßen Verpackungseinheit.
• 3 zeigt eine zweite Ausführungsform eines teilweise verstärkten Verpackungszuschnitts, wie er zur Herstellung einer erfindungsgemäßen Verpackungseinheit Verwendung finden kann.
• 4 zeigt eine Ausführungsform einer erfindungsgemäßen Verpackungseinheit.
• 5 zeigt einen Teilbereich einer zweiten Ausführungsform einer Verpackungsvorrichtung zur Herstellung einer erfindungsgemäßen Verpackungseinheit.

In the following, exemplary embodiments are intended to explain the invention and its advantages in more detail with reference to the accompanying figures. The proportions of the individual elements to one another in the figures do not always correspond to the real proportions, since some forms are shown in simplified form and other forms are shown enlarged in relation to other elements for better illustration.

• 1 shows a first embodiment of a partially reinforced packaging blank, as can be used to produce a packaging unit according to the invention.
• 2 shows a first embodiment of a packaging device for producing a packaging unit according to the invention.
• 3 shows a second embodiment of a partially reinforced packaging blank, as can be used to produce a packaging unit according to the invention.
• 4 shows an embodiment of a packaging unit according to the invention.
• 5 shows a portion of a second embodiment of a packaging device for producing a packaging unit according to the invention.

Identical reference symbols are used for elements of the invention that are the same or have the same effect. Furthermore, for the sake of clarity, only reference symbols are shown in the individual figures that are necessary for the description of the respective figure. The illustrated embodiments only represent examples of how the device according to the invention or the method according to the invention can be designed and do not represent any final limitation.

The schematic representation of 1 shows a first embodiment of a partially reinforced packaging blank 20. The packaging blank 20 is formed in particular from a flat packaging material 21 made of paper or comprising paper. A thin cardboard material can also be used to advantage. The packaging blank 20 is equipped at least in regions with at least one reinforcement element 22, which is also preferably formed from a reinforcement material 23 made of paper or paper.

In the illustrated first exemplary embodiment, the free end regions 25 of the packaging blank 20 are each equipped with a reinforcing element 22, on which free end regions of the packaging blank 20 the articles in the finished packaging unit are arranged standing up. That is, the free end regions 25 each form part of the bottom side of the packaging unit and when using a packaging blank 20 according to FIG 1 reinforced and additionally stabilized by the appropriately placed reinforcement elements 22 .

Such a packaging blank 20 is used to cover at least two articles at least in some areas and thereby combine them as a packaging unit or bundle. In particular, the packaging blank 20 covers the tops and bottoms of the articles and at least areas of the outer lateral surfaces of the articles.

The schematic representation of 2 shows a side view of a first embodiment of a packaging device 1 for the production of packaging units 40.

The packaging device 1 comprises a divider module 2 for dividing articles 30 into article groups 31. The articles 30 are fed to the divider module 2, for example, in an orderly or unordered mass flow.

The items 30 are preferably beverage containers, in particular bottles made of PET or another suitable plastic. The items 30 can preferably also be formed by cans made of plastic and/or aluminum or another metal or the like. An article group 31 can, in particular, comprise at least two articles 30 of identical design or be formed by at least two articles 30 of different design.

However, the packaging device 1 described here and the method for producing packaging units described in this document are also suitable for arranging a corresponding packaging blank 20 on other suitable articles 30 or groups of articles 31 and for fixing them thereto.

The article groups 31 are fed to a packaging module 4, in particular a wrapping module 5, via a suitable transport device 3, for example an endless conveyor belt or the like. A reservoir 6 for flat packaging material 21, in particular a paper roll 21*, is assigned to the wrapping module 5. Flat packaging material 21 is unrolled from the reservoir 6 and fed to the wrapping module 5 . For example, the unrolled packaging material 21 is guided here via a control unit 7, in particular a so-called dancer 8. The control unit 7 regulates the tension of the material web and/or serves as an intermediate store for the unrolled packaging material 21.

The packaging material 21 is fed to a separating station 9 with at least one cutting device 10, in which packaging blanks 20 are separated from the continuous web of material in the appropriate length. The individual packaging blanks 20 are then fed to the wrapping module 5 in a conveying direction FR via a suitable transport device 11, in particular a conveyor belt or the like.

Furthermore, an application module 12 is provided, which is designed to equip the packaging material 21 forming the packaging blank 20 at least in regions with at least one reinforcing element 22 formed from paper or cardboard.

In particular, a paper roll 23 * is assigned to the application module 12 as a reinforcing agent reservoir 24 . A separating station 13 with a cutting device 14 or the like is provided within the application module 12 or assigned to the application module 12, which separates the reinforcement elements 22 in the desired shape and/or size from the reinforcement material 23 provided by the paper roll 23*.

The reinforcement element 22 is positioned and/or fastened at a corresponding point on the packaging blank 20; in particular, the reinforcement element 22 can be fixed to the packaging blank 20 by means of an adhesive connection. For this purpose, the application module 12 includes a suitable adhesive device 15 which is designed to apply adhesive to the packaging blank 20 and/or the reinforcement element 22 and to fix the packaging blank 20 and the reinforcement element 22 to one another via an adhesive connection.

In the exemplary embodiment shown, reinforcement elements 22 are placed in the leading and trailing end areas of the packaging blank 20 , which subsequently form a partial area of the bottom side of the packaging unit 40 .

The side of the packaging blank 20 on which the at least one reinforcement element 22 is arranged forms, in particular, an inside of the packaging unit 40. As a result, the at least one reinforcement element 22 within the packaging unit 40 is only visible to the customer after the packaging unit 40 has been opened. Thus, the reinforcing member 22 can be formed from a lower quality paper or board material, such as recycled paper or the like. In addition, it is not necessary to decoratively print the reinforcement element 22 . In addition, it is not necessary to ensure that the reinforcing element 22 could possibly cover important information contained on the packaging blank 20 .

Furthermore, different strengths of paper or cardboard material can be used as the reinforcement element 22, in particular depending on the corresponding stress on the area of the packaging unit 40 in which the at least one reinforcement element 22 is placed.

For the correct placement of the reinforcement elements 22 on the packaging material 21 for the packaging blank 20, at least one sensor 16 can be provided, which is coupled to a control unit 17, which controls and controls the gluing device 15 accordingly

In the illustrated embodiment according to 2 The packaging material 21 is thus reinforced in some areas by reinforcement elements 22 before a packaging blank 20 is cut off in the appropriate length by the separating station 9 and fed to the wrapping module 5 .

The correspondingly reinforced packaging blank 20 is fed to the wrapping module 5 in a conveying direction FR, generally from below. Furthermore, the article groups 31 from the dividing module 2 are fed to the wrapping module 5 in a transport direction TR via the transport device 3 . A group of articles 31 is arranged at least in areas on a leading end area of the packaging blank 20, in particular on a reinforced end area, and the remaining part of the packaging blank 20 is wrapped around the group of articles 31, so that the articles 30 are at least in areas wrapped and/or wrapped by the packaging blank 20 to be wrapped.

It is also provided that the articles 30 of the article group 31 are also arranged at least partially on the trailing end area, in particular on the trailing reinforced end area, of the packaging blank 20, so that this trailing end area of the packaging blank 20 at least partially covers the bottom side of the packaging unit 40 produced in this way forms.

In particular, at least some of the articles 30 of the article group 31 are arranged in an overlapping area, which overlapping area is formed in particular by the trailing end area of the packaging blank 20 and the leading end area of the packaging blank 20 arranged thereon.

The group of articles 31 wrapped with the packaging blank 20 forms the packaging unit 40.

Furthermore, it can be provided that the packaging device 1 is designed to produce packaging units 40 without a so-called laterally open eye, as is the case for example is known in conventional shrink packaging. For this purpose it is provided that the wrapping module 5 is assigned at least one folding device 17 which is designed to fold laterally protruding areas of the packaging blank 20 on the article group 31 to form a packaging that is closed on all sides.

The at least one folding device 17 is preferably designed to fold down an upper laterally projecting area of the packaging blank 20 and to fold a lower laterally projecting area of the packaging blank 20 upwards. Preferably, the upper area folded down and the lower area folded up overlap at least partially and can be fixed to one another using suitable fastening means. For example, a suitable fastening device in the form of an adhesive device for producing a suitable adhesive connection, in the form of a welding device for producing a suitable welded connection or the like is provided for this purpose.

Alternatively, it can be provided that the upper area folded down and the lower area folded up do not overlap or only partially overlap, so that laterally open areas are formed. However, fixing the folded areas in place can also be advantageous in this case. For example, the folded areas can be attached to the outer jacket surfaces of the articles by suitable attachment means, for example by adhesive bonds or the like.

The schematic view of 3 shows a second embodiment of a partially reinforced packaging blank 20.

The further schematic view of 4 shows an embodiment of a packaging unit 40 according to the invention, which using a packaging blank 20 according to 3 was produced.

The at least one reinforcing element 22 can be arranged in different areas on the packaging blank 20, so that in the finished packaging unit 40, in particular the bottom side and/or the top side and/or edges and/or side surfaces of the packaging unit 40 are reinforced at least in certain areas.

At the in 3 In the package blank 20 shown, additional reinforcement elements 22 are provided in the middle region, which are identified below with the reference numeral 22m. Furthermore, the transport direction TR is shown, in which the packaging blank 20 and the article groups 31 through the wrapping module (cf 2 and 5 ) can be moved.

The base area and lower edges of the packaging unit 40 are reinforced by the reinforcement elements 22 arranged at the end of the packaging blank 20 . Furthermore, upper edges of the packaging unit 40 are reinforced by the reinforcing elements 22m arranged centrally on the packaging blank 20 .

The targeted reinforcement of the packaging blank 20 in particularly stressed areas of the packaging unit 40 can also result in a reduction in the material thickness of the packaging blank 20 used, i.e. paper webs with a smaller paper thickness can be used for the packaging blank 20.

The schematic representation of 5 finally shows a portion of a second embodiment of a packaging device 1 for producing a packaging unit 40 according to the invention 5 essentially only the impact module 5 and associated devices are shown. With regard to the other modules of the packaging device 1, in particular the divider module, refer to the description of 2 referred.

At the in 5 In the exemplary embodiment illustrated, reinforcement elements 22 are placed in the leading and trailing end areas, which subsequently form a partial area of the bottom side of the packaging unit 40, and in central areas of the packaging blank 20.

In the illustrated embodiment according to 5 the packaging material 21 is reinforced in some areas by reinforcement elements 22 after a packaging blank 20 of the appropriate length has been severed by the separating station 9 or in temporal relation to the separating of a packaging blank 20 of the appropriate length by the separating station 9.

The embodiments, examples and variants of the preceding paragraphs, the claims or the following description and figures, including their different views or respective individual features, can be used independently of one another or in any combination. Features described in connection with one embodiment are applicable to all embodiments unless the features are incompatible.

Although in the context of the figures generally of "schematic" representations and Views are discussed, this in no way means that the representations of the figures and their description should be of secondary importance with regard to the disclosure of the invention. The person skilled in the art is quite capable of extracting enough information from the diagrammatically and abstractly drawn illustrations to make it easier for him to understand the invention, without having to learn from the drawn and possibly not exactly true-to-scale proportions of the articles and/or parts of the device or other drawn elements would be impaired in any way in his understanding. The figures thus enable the person skilled in the art as a reader to derive a better understanding of the inventive concept formulated more generally and/or more abstractly in the claims and in the general part of the description on the basis of the more specifically explained implementations of the method according to the invention and the more specifically explained mode of operation of the device according to the invention.

The invention has been described with reference to a preferred embodiment. However, it will be apparent to a person skilled in the art that modifications or variations can be made to the invention without departing from the scope of the following claims.

Reference List

1

packaging device

2

one-piece module

3

transport device

4

packaging module

5

impact module

6

reservoir

7

control unit

8th

dancer

9

separation station

10

cutting device

11

transport device

12

application module

13

separation station

14

cutting device

15

gluing device

16

sensor

17

folding device

20

packaging blank

21

packing material

21*

paper roll

22

reinforcement element

22m

Reinforcement element arranged in the central area

23

reinforcement material

23*

paper roll

24

enhancer reservoir

25

free end area

30

items

31

item group

40

Packaging Unit

FR

conveying direction

TR

transport direction

QUOTES INCLUDED IN DESCRIPTION

This list of documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• EP 2704949 B1 [0004]

Claims (11)

Packaging device (1) for producing packaging units (40), the packaging units (40) comprising at least two articles (30), wherein the articles (30) are at least partially encased by a flat packaging blank (20) made of paper or comprising paper, the packaging device (1) comprising • a division module for dividing articles (30) into article groups (31), • a packaging module (3) for at least partially covering the article groups (31) with the packaging blank (20), • at least one feed device for feeding a packaging material (21) forming the packaging blank (20) or for feeding the packaging blank (20) to the packaging module (3), • and at least one application module (12) assigned to the feed device, • which application module (12) is designed to equip a packaging material (21) forming the packaging blank (20) or the packaging blank (20) with at least one reinforcing element (22) made of paper or cardboard, at least in some areas. Packaging device (1) after claim 1 , wherein the application module (12) comprises a magazine for reinforcement elements (22). Packaging device (1) according to one of Claims 1 or 2 , wherein the application module (12) comprises a magazine (24) for a reinforcement material (23) and a device for forming a reinforcement element (22) from the reinforcement material (23), in particular a cutting device (14). Packaging device (1) according to one of Claims 1 until 3 , At least one sensor (16) for detecting parameters of the packaging blank (20) and/or the reinforcement element (22) being assigned to the application module (14). Packaging device (1) according to one of the preceding claims, wherein the application module (22) comprises an adhesive device (15) and/or a welding device. Packaging unit (40) comprising at least two articles (30), the articles (30) being at least partially encased by a flat packaging blank (20) made of paper or comprising paper, the packaging blank (20) having a abutting inner side and an outer side forming the outer surface of the packaging unit (40), a reinforcing element (22) made of paper or cardboard being arranged at least in regions on the inner side of the packaging blank (20). Packing unit (40) according to claim 6 wherein a bottom side of the packaging unit (40) is at least partially reinforced by at least one reinforcing element (22) and/or wherein a top side of the packaging unit (40) is reinforced at least partially by at least one reinforcing element (22). Packing unit (40) according to claim 6 or 7 wherein at least one edge of the packaging unit (40) is reinforced at least in regions by at least one reinforcing element (22) and/or wherein a side surface of the packaging unit (40) is reinforced at least in regions by at least one reinforcing element (22). Method for producing a packaging unit (40) comprising at least two articles (30), wherein the articles (30) are at least partially encased by a flat packaging blank (20) made of paper or comprising paper, the method comprising the following steps, • dividing articles (30) into article groups (31), • feeding a packaging material (21) forming the packaging blank (20) or feeding the packaging blank (20) to a packaging module (3) for at least partially encasing the article groups (31) with the packaging blank (20), • wherein at least one reinforcing element (22) made of paper or cardboard is attached at least in regions to the packaging material (21) or the packaging blank (20) during the feeding. procedure after claim 9 wherein the reinforcing element (22) is attached to a side of the packaging material (21) or the packaging blank (20), which side in the packaging unit (40) forms an inner side adjacent to the articles (30). procedure after claim 9 or 10 , wherein the reinforcing element (22) is glued, welded, inserted or folded.

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