KR101932282B1

KR101932282B1 - Blister packing machine and blister pack

Info

Publication number: KR101932282B1
Application number: KR1020110062202A
Authority: KR
Inventors: 자호란스키 울리히; 조스트 마이클
Original assignee: 자호란스키 아게
Priority date: 2010-07-30
Filing date: 2011-06-27
Publication date: 2018-12-24
Also published as: ITMI20111386A1; KR20120012382A; DE102010032944A1; BE1020393A3; TWI572530B; DE102010032944B4; CN102372101A; TW201208945A

Abstract

A blister pack (16) comprising a blister pocket (18) for receiving an object (20) and a cover layer (17) closing the blister pocket (18) A closed aperture region 21 is provided, wherein the plastic material 22 comprises or is associated with a release tab 23. A blister packaging machine (1) for packaging an article (20) in a blister pack (16) comprising: overmolding an opening area (21) of the blister pack (16) with a plastic material (22) At least one injection station 7a, 7b, 7c is provided for the purpose of coupling the plastic material 2 with the opening tabs for the injection of the plastic material 22 or for the injection of the plastic material 22).

Description

[0001] BLISTER PACKING MACHINE AND BLISTER PACK [0002]

The present invention relates to a blister packaging machine and a blister pack for packaging articles in blister packs.

Such blister packs are known in numerous implementations. In addition to toothbrushes, interdental toothbrushes, mascara brushes or other cosmetics or sanitary items, a wide variety of other items, such as electronic devices, memory cards, toys, medical products or life products such as sweets in particular, may be packaged in a blister pack. Typically, the items to be packaged are placed in blister pockets that are closed with a cover layer of cardboard material. Also provided is a folded blister in which the blister material is folded 180 ° and the blister pocket is closed by the blister material.

However, the problem with all the previously known blister packs is that these blister packs are difficult to open. In most cases, scissors are needed to cut the blister pack over the entire length in the area of the blister pocket. This is cumbersome, and there is a high risk that the cut blister material edges will be sharp and injured. When tearing apart blister pockets from a carton cover layer, most of the carton layer remains in the blister. In the case of a blister package comprising a perforation in which the cover layer of cardboard material may be stamped for the opening of the blister pack, this approach is relatively cumbersome because the perforated portion of the cover layer is first pushed into the blister pocket This is because the object may be damaged.

With the device known from DE 10 2007 041 948 A1, the plastic material can be injected onto the blister package. These plastic materials preferentially satisfy the purpose of decoration. Blister packs made using such devices are not simply openable and not for such use.

Therefore, it is an object of the present invention to provide a blister packaging machine of the kind mentioned at the outset, and to be able to manufacture a blister pack which is easy to open by using such a machine. It is another object of the present invention to provide a blister pack which is simple to open.

A solution to this problem in accordance with the present invention is to provide a blister packaging machine which is capable of overmolding the opening area of the blister pack with a plastic material and for ejecting the opening tab from the plastic material, At least one injection station is provided for joining the tabs. The protruding / releasing tab serves as a handle and can be easily gripped when the blister pack is opened. The opening tab is peeled off to remove the injected plastic material, and when the opening area is exposed, the blister pack is opened. At this time, there is no need to use scissors or other tools to open the blister pack, and there is no risk of injury because sharp edges do not occur.

In DE 10 2007 041 948 A1 it is described that the recesses in the foil or cover layer can be overmolded with a plastic material, but here, for example, the smaller of the applications for piloting the buttons of a remote control packaged in a blister pack It is about the size of the recess. These recesses do not form an opening area through which a packaged object can be taken out.

It is preferred that an arrangement for inserting a recess, perforation or cutting line into the blister pack is provided as an opening area in front of the injection station. The opening area can be matched to the material in the blister pack and to the material in the blister pack in relation to its size. In the case of perforations, perforations may be formed, preferably including two perforated lines parallel to each other at intervals of a few millimeters, the perforated lines being along one side of the blister pocket or around the entire blister pocket . The plastic material injected via the perforations combines with the blister material located between the perforation lines at the time of extrusion, and when the extruded plastic material is peeled off, the blister material located between the perforation lines peels together and the blister pack is opened. Blister pockets can be tilted upwards or to the side or removed completely to remove the packaged object.

In the case of many blister packs, the blister pockets are formed by closing the blister pockets in combination with the cover layer of the carton or Tyvek®-foil after the article to be packed is inserted into the blister pocket. In the case of such blister packs, it is preferable to place a sealing station for the blending of the blister pockets and the cover layer in front of the injection station.

It is preferred that a device for folding the blister part forming the blister pack in front of the injection station be placed in the production of the foldable blisters in such a way that the blister material collapses while the sides facing towards each other are closed. The contact areas when adjacent side-by-side folds together form an opening area, which is overmolded with plastic material. This can be a border area when the outer contours of the sides facing each other are the same or a contact area at one of the flat sides when the sides are formed differently. Cutting lines or perforations can also be inserted into one of the sides and it is overmolded with a plastic material as an opening area, while the outer edges of the blister material are fixedly connected to one another and this remains after the opening of the blister pack It is also possible.

The inventive idea of the present invention contemplates that the injection station is formed for at least partial overmolding of additional elements disposed in the aperture region. This can be, for example, an RFID transponder for preventing theft of goods. When the blister pack is opened, these additional elements may be removed / removed and destroyed together when the injection-coated plastic material is peeled off.

Plastic material may be injected into additional functional members, such as a membrane for pressure balancing between the inner space of the blister pocket and the periphery, which is important when transporting a larger blister pack to an aircraft can do. Or the functional member has a valve for gas injection of the object in the blister pocket or a valve for fluid exchange. Holders or alignment members for blister packs are also possible. It is also possible to consider an isolation flag which is disposed between the contacts of the battery-driven object and engages with the plastic material when the plastic material is injected. When the blister pack is opened, the insulating portion is removed when the plastic material is torn, and the battery of the object is brought into contact with the object to be driven, while the battery is not packed and electrically charged. On the other hand, in order to be able to externally contact a packaged article without a battery, for example, to be able to test and inspect the packaged article without having to remove the article from the package by means of a contact, May be outwardly directed. A push button or magnet may also be provided to close the blister pack again. Such a functional member may be provided in the opening area or in such area of the blister pack, for example, an alignment member may be provided at the lower edge of the blister pack.

A plurality of injection stations may be provided to inject plastic material on different sides of the blister pack. At this time, plastic materials can be injected in different colors. The plastic material can be tailored, for example, to the article to be packaged.

On the injected plastic material or on the plastic material side, the originality seal, freshness stamp, braille sign, logo, phrase or the like may be provided with the originality seal, storage time limit, .

In front of the injection station, a device for inserting a through hole in the blister pack can be arranged. Thus, injection can be performed through the through holes at both sides of the blister pack using only one injection station.

The injection station may be suitably formed to inject plastic material on the side of the article to be packaged or on a part of the article. For example, an interdental toothbrush packaged in a blister pocket may be positioned so that the handle of the toothbrush is disposed in the vicinity of the opening area or in the vicinity of the opening area and engages the plastic material upon injection of the plastic material. When the package is opened and the plastic material is torn, the interdental toothbrush is first held in engagement with the plastic material so that the interdental toothbrush exits directly from the blister pocket without having to hold it separately. The opening area may be as large as the outer contour of the handle of the interdental toothbrush, and the interdental toothbrush may be removed from the blister pack through the opening area in the longitudinal direction. After use of the interdental toothbrush, the interdental toothbrush can be inserted back into the opening area with the handle for drying. The blister pack additionally serves as a stand for the interdental toothbrush after removing the interdental toothbrush. After drying, the interdental toothbrush may again be pushed into the blister pocket first with the bristles, with a portion of the handle protruding from the opening area so that the interdental toothbrush can later be retrieved from the blister pack.

The injection station may be formed for injection while injecting plastic material into the internal space of the blister pack. Thereby, the packaged object can be held / held in place, and the plastic material is injected between the blister material and the object, so that the blister pack can be protected from damage by the packaged object, .

The injection station may also be configured to couple a plurality of blister packs together. The interlaced blister packs can be displayed on the shelf and the customer can pull out one of the blister packs by pulling out the plastic material injected between the two blister packs.

On the other hand, a plurality of blister pockets that are independent of one another in a single blister pack may be provided, each having one opening area, for example, a replacement head-toothbrush and a plurality of separately removable toothbrush head packages For example.

Using a device for separating individual blister packs from each other and from the blister web, plastic material is first injected in an injection process using a single injection station in two adjacent blister packs, Are separated in the region of the injected plastic material, leaving the plastic material in the two blister packs. In addition, regions are cut from blister packs to form areas that are separate from one another, including plastic material, for example, an area for the blister pack opening and a separate purely decorative area.

The separation of the blister packs from each other or from the blister web can be accomplished in a variety of ways, including roller cutting, steel strip cutting, complete free cutting or cross-section perforation, May be implemented.

In particular, for the manufacture of blister packs which can be reclosed, it may be advantageous to arrange an arrangement for laminating a cover band on the opening area, which can be overmolded with plastic material before the injection station. This cover band prevents the plastic material from contacting the cutting edge of the blister material directly at the open area at the time of injection. The plastic material is attached only to areas of the blister material that are spaced apart from the cutting edge by the size of the cover band, so that when the blister pack is opened and the plastic material is peeled off, the cutting edge is not peeled off to the outside, Damage to the material is prevented. This also reduces the risk of injury.

The inventive idea of the present invention contemplates the placement of an additional injection station for injecting the cover layer from the plastic material in front of the injection station for overmolding the opening area of the blister pack with the plastic material. The entire cover layer may be an extruded plastic material instead of a carton, for example.

As a plastic material, a soft TPE is generally used, whereby the plastic material can easily bend and deform when torn. However, other plastic materials which are harder to stabilize the blister pack and / or for optical reasons may be used.

A solution according to the invention in the context of a blister pack is to have an opening area which is closed by the injected plastic material and the plastic material comprises or combines with the opening tab. As described above, the blister pack can be easily opened without scissors or tools, and there is no risk of injury when the blister pack is opened.

The opening area can be formed in particular by a recess, perforation or cutting line.

In addition to a carton, foil material, or a cover layer of Tyvek® material, the blister pack can be formed as a foldable blister and the cover layer can be formed as a folded blister portion covering the open area of the blister pocket. The latter of the cover layer materials can be used particularly in the medical field. The folded blister portion may be flattened or the blister portion may include blister pockets, such blister pockets may form, along with blister pockets of other blister portions, a larger receiving area for the article to be packed have.

Further, the cover layer may be made of an injected plastic material. The plastic material may be formed of a planar member or it may include a feature region that likewise increases the receiving area for the article. It is also possible to form a plastic as a seat for the object. The plastic material of the cover layer may, for example, be combined with the blister pockets by overmolding, wherein the plastic material of the cover layer and the plastic material of the overmolding may be of the same kind, of a different kind, or in particular of different colors.

It is advantageous that the cover layer comprises at least one bent edge opposite the opening area. After the plastic material closing the opening area is removed, the pack can be folded at the fold edge and then the blister pockets including the opening area can be opened to expose and easily take out the packaged goods to be. At this time, if the pack is turned so that the opening side faces downward, the object can be placed on the surface without holding the object. This may be particularly important in the medical field, for example, when attempting to place a sterile packaged surgical scalpel on an instrument table. If two spaced-apart folding edges are provided, a seating area for the packaged object is formed between these folded edges so that the object is seated more securely on the package after the pack is opened and the cover layer is bent at the folding edge And can be transported continuously.

It is advantageous that a cover band covering the opening area is provided and the cover band is overmolded by the plastic material. This cover band prevents the plastic material from directly contacting the cut edge of the blister material in the open area. The plastic material is attached to areas of the blister material that are positioned in correspondence with the dimensions of the cover band in a spaced-apart relationship from the cutting edge, so that when the blister pack is opened and the plastic material is peeled off, It is stripped and damage to the blister material is prevented. Also, the risk of injury is reduced. The end of the cover band forms a release tab, so that the plastic material is peeled off indirectly through the cover band located beneath it.

It may also be appropriate if the opening area is formed by a zipper lock or includes a zipper lock. The blister pack may serve as a reclosable container and serve as a transfer bag for electronic devices, for example. It is also contemplated that blister packs may be used, for example, as return delivery packs for sterile packaged surgical tools, and such tools contained in reclosable blister packs may be returned to the manufacturer after use for disposal or processing And re-sterilized.

The blister pack according to the present invention may include each or a plurality of the features mentioned in the description of the blister packaging machine according to the present invention and may include, for example, a magnet or a push button for re- have.

The injection molded plastic can be used as a perfume preservative with the perfume being inserted into the blister pocket. The perfume is preferably volatile and does not stick to the packaged object. The perfume is exposed when the blister pack is opened, and the person opening the blister pack feels the corresponding sense of smell.

The injection molded plastic material may serve as an information protection device. For example, a software lens cord or a free circuit cord may be imprinted on the bottom of the plastic material, preferably on the cover layer side, and this cord may be visible by removal of the plastic material only when the blister pack is opened. In addition, the plastic material may serve as an optical protection device for the packaged object, and in the case of a photosensor, for example, the photosensor is protected from incident light by a plastic material.

Hereinafter, embodiments of the blister packaging machine and the blister pack according to the present invention will be described in more detail with reference to the drawings.

1 is a highly simplified diagram of a blister packaging machine according to the present invention comprising a plurality of processing stations.
2 is a side view and plan view of the cover layer of the blister pack.
Figure 3 is a side view and plan view of the blister foil.
Figure 4 is a side view and plan view of a blister pack packaged with a toothbrush inside.
Fig. 5 is a side view and a plan view of the plastic material injected into the blister pack of Fig. 4; Fig.
6 is a side view and a plan view of the blister pack of Fig.
7 is a longitudinal cross-sectional view of a blister pack including an overmolded cover band.
8 is a top view of the blister pack of Fig.
Figure 9 is a cross-sectional view of the blister pack of Figure 7;
10 is a partial enlarged view of a cross-sectional view of FIG.
11 is a longitudinal sectional view of the blister pack from which the overmolding portion is removed.
Figure 12 is a top view of the blister pack of Figure 11;
13 is a front side view of the blister pack of Figs. 11 and 12. Fig.
Figure 14 is a longitudinal side view of an open blister pack.
15 is a top view of an open blister pack.
16 is a front side view of the opened blister pack.
Figure 17 is a view of a blister pack formed as a folding blister when packaging the article.
18 is a view showing the blister pack of Fig. 17 in a closed state.
Fig. 19 is a view showing a state in which the blister packs of Figs. 17 and 18 are in the opened state.

A blister packaging machine, indicated in its entirety by 1 for packing of articles, comprises a foil roll 2 according to figure 1 in which the foil material 3 for blister pockets from this foil roll is unwound and the individual processing stations . After passing through the heating device 4 for heating the foil material 3, the foil material 3 is made into the desired shape in the molding device 5. The molding apparatus 5 may be formed in a known and authorized manner and may include a molding tool that locally accommodates the foil material 3, in which a molding die is inserted and the heated foil Draw in the desired form.

Behind the molding apparatus 5 is arranged a first device 6a for inserting a recess, perforation or cutting line into the foil material 3 as an opening area. The opening region is overmolded with a plastic material at the first injection station 7a disposed at the rear, and at the same time with a release tab not shown in FIG. 1, or as a separate member, with the injection molded plastic material. Injection can be made to the side, top, or inside as functional elements, decorative elements or similar articles. The plastics material may be injected into the inner bore of the molded part of the arc as a seating member and for the purpose of better keeping the article to be packaged in place in the blister pocket.

The injection station 7a does not necessarily have to be arranged in the illustrated arrangement and may for example be arranged under the foil material 3 so that injection takes place on the opposite side of the foil material 3. [

After the injection of a part of the arc into the plastic material, the object to be packed, for example a toothbrush, is inserted into the inner hole of the part of the blister-like arc at the insertion station 8 and at the additional processing station 9, 10, Layer and joined thereto, and the blister pack is closed. The cover material 11 for the cover layer is fed from the material roll 12 via the deflection roll 13. Recesses, perforations or cut lines can be inserted into the cover layer using the additional device 6b and can be overmolded with plastic material using the additional injection station 7b. This can be implemented additionally or alternatively to the above-described apparatus 6a and the injection station 7a. The aperture region may be provided in the blister material and / or in the cover layer.

Likewise, additionally or alternatively, after the processing station 10 for joining the blister pockets to the cover layer, a device 6c for inserting an opening area and an injection station 7c for overmolding such opening area ) May be provided.

At this point, the blister pockets juxtaposed as blister webs are separated into individual blister packs at the separation station 14, and then removed from the device 1. In the subsequent production process, individual blister packs may be supplied to the additional processing device 15, for example, a paver.

The order of the individual processing stations of the device 1 may vary depending on the application method. Likewise, individual processing stations may be omitted or other stations may be added. The manner of forming the device 1 according to the present invention is not limited to the illustrated embodiment.

Figures 2 to 6 show the individual completion steps for the manufacture of the blister pack 16. Figure 2 shows the cover layer 17 and Figure 3 shows the call part 19 with the blister pockets 18 for receiving the article 20 to be packed (Figures 4 to 6). As can be seen from the plan view of Figures 3 and 4, a double-line perforation is inserted into the arc portion 19 as parallel to the obturator of the blister pocket 18, as the opening region 21. The arc portion 19 and the cover layer 17 are mutually coupled, for example glued or welded, such that this coupling is only in the peripheral region of the blister pocket 18 and the opening region 21. The area of the call part 19 including the aperture area 21 and the area between the aperture area 21 and the blister pocket 18 are not associated with the cover layer 17. [

5, the open area 21 is overmolded with a plastic material 22, wherein the plastic material 22 includes a protruding opening tab 23 at the end. The plastic material 22 is injected into the arc part 19 and the cover layer 17 via the linear through holes 31a and 31b so that the plastic material 22 according to the side view of Figures 5 and 6 is injected into the blister pack Reaches the cover layer side of the light guide plate 16. In order to clarify the dimensions and arrangement of the plastic material 22 injected into the side, the perforations are indicated by dashed lines in Figs.

Figure 6 shows a completed and punched blister pack 16 in which the excess rim areas are cut and the hanger tabs 24 are formed into corresponding depressions. By this depression, the plastic material 22 covering the opening area 21 is separated from the plastic material 22 in the area of the hook tab 24. Two regions including the plastic material 22 injected on the side are formed and these regions can be injected using a single injection station via a single injection point 25 (Figure 5) in the injection process .

For opening the blister pack 16, the plastic material 22 may be peeled off from the protruding release tabs 23. At this time, the foil material is detached and torn away together with the plastic material 22 between the perforated lines attached to the plastic material 22. With the opening thus formed, the article 20, in which the toothbrush can be removed from the blister pack 16.

Figures 7 to 16 illustrate another embodiment of blister pack 16. Such a blister pack 16 also includes a blister pocket 18 and a cover layer 17 on which the article 20 is disposed. The opening area 21 is formed by a cut line, which extends over the entire length of the blister pocket 18 (Figs. 10, 12, 13).

10, the cut line of the opening area 21 is covered with a cover band 26 so that the extruded plastic material 22 is located between the front side of the blister material facing each other And is engaged with the blister pocket 18 only on the upper side. This allows the edges of the blister pockets 18 to escape outward when the plastic material 22 covering the opening area 21 is uncovered at the time of opening the blister pack 16, No corners occur. In addition, it is easy to peel off the plastic material 22. In Figure 7, the interior space of the blister pocket 18 is provided with a storage member 27 of a plastic material material, which keeps the article 20 in place and the blister pocket 18, Thereby protecting it from damage by the object 20 such as a scalpel. This storage member 27 engages with the plastic material 22 that closes the opening area 21 such that the storage member is similarly removed when the plastic material 22 is peeled off.

Figures 7 to 10 show a closed blister pack 16. 11-13, the plastic material 22 is removed with the cover band 26, and the opening area 21 is exposed. The cover layer 17 may be folded at the fold edge 28 (Fig. 16) to remove the object 20. The half of the blister pockets 18 separated from the cutting line of the opening area 21 can be opened while being bent at the side and the inner space of the blister pocket 18 can be exposed. Figures 15 and 16 show the area around the tortuous edge 28 slightly enlarged and slightly enlarged to show more clearly.

With the blister pack 16 in this manner, the article can be removed from the blister pack 16 without holding the article 20, wherein the opening area 21 is aligned with the seating surface downward, (20) is pulled out of the blister pocket (16) by folding the folding edge (17) at the fold edge (28).

17-19 illustrate a blister pack 16 formed as a foldable blister. The call part 19 includes two features 29 which are folded and folded together to form a blister pocket 18 (FIG. 18) for receiving the item 20. A perforation or cutting line 30 for the formation of the opening area 21 is inserted in the part of the arc part 19 forming the upper side of the blister pack 16 which is overmolded with the plastic material 22 from the outside (Fig. 18). The plastic material 22 includes a protruding opening tab 23 as a handle. The rim side contact surfaces of the portions of the call folded together from outside of the cutting line 30 are joined to one another to close the blister pack 16, for example, bonded or welded. On the other hand, the inner contact surface remains unjoined, and the opening tab 23 at the part forming the upper side is peeled off, at which time the plastic material contacts the cutting line 30 The closed blister pack 16 (Fig. 18) can be opened while the remaining area of the top foil area is folded open with the plastic material 22 (Fig. 18) 19).

1: Device according to the invention
2: foil roll 3: foil material
4: Heating device 5: Molding device
6a: first device 6b: additional device
6c: device for insertion 7a: first injection station
7b: additional injection station 7c: injection station
8: Insertion station 9, 10: Processing station
11: Cover material 12: Material roll
13: deflection roll 15: additional processing device
16: blister pack 17: cover layer
18: blister pocket 19: arc part
20: Item 21: opening area
22: plastic material 23: opening tab
24: Hook tab 25: Injection point
26: cover band 27: storage member
28: Bending edge 29:
30: cutting line 31a, 31b: through hole

Claims

A blister packaging machine (1) for packaging an article (20) in a blister pack (16)
The open area 21 of the blister pack 16 is overmolded with a plastic material 22 and the opening tab 23 is ejected from the plastic material 22, At least one injection station (7a, 7b, 7c) for coupling the plastic material (22) with the opening tab is provided,
Wherein a plurality of injection stations (7a, 7b, 7c) are provided for injecting the plastic material (22) onto different sides of the blister pack (16).

The method according to claim 1,
Devices 6a, 6b and 6c for inserting recesses, perforations or cutting lines are arranged in front of the injection stations 7a, 7b and 7c as opening areas 21 in the blister pack 16 Blister packing machine.

The method according to claim 1 or 2,
Characterized in that a device for folding a call part (19) forming a blister pack (16) is arranged in front of said injection stations (7a, 7b, 7c).

The method according to claim 1,
Characterized in that the injection stations (7a, 7b, 7c) are formed for at least partially overmolding additional members disposed in the opening region (21).

The method according to claim 1,
Characterized in that a sealing station (9, 10) is arranged in front of the injection station (7a, 7b, 7c) for engaging the call part (19) with the cover layer (17).

The method according to claim 1,
In front of the injection stations 7a, 7b and 7c for overmolding the opening area 21 of the blister pack 16 with a plastic material 22 there is an additional injection for the injection of the cover layer 17 from plastic material Wherein the station is disposed in the blister packaging machine.

delete

The method according to claim 1,
Characterized in that a device for inserting through holes in the blister pack (16) is arranged in front of the injection stations (7a, 7b, 7c).

The method according to claim 1,
Characterized in that the injection stations (7a, 7b, 7c) are formed for the injection of the plastic material (22) into the article (20) to be packaged or to a part of the article (20).

The method according to claim 1,
Characterized in that the injection stations (7a, 7b, 7c) are formed to inject the plastic material (22) into the internal space of the blister pack (16).

The method according to claim 1,
Characterized in that said injection stations (7a, 7b, 7c) are formed for mutual coupling of a plurality of blister packs (16).

The method according to claim 1,
Characterized in that a device (14) is provided for separating the individual blister packs (16) from the blister webs while separating / separating them from each other.

The method according to claim 1,
Characterized in that an arrangement is provided in front of the injection stations (7a, 7b, 7c) for applying a cover band (26) over the opening area (21) which can be overmolded with the plastic material (22) packer.

A blister pack (16) comprising a blister pocket (18) for receiving an object (20) and a cover layer (17) for closing the blister pocket (18)
An open area 21 is provided which is closed with an injected plastic material 22 and the plastic material 22 comprises or is associated with a tearing tab 23,
Characterized in that the blister pack (16) is formed as a foldable blister and the cover layer is formed as a folded blister part covering the opening area (21) of the blister pack (16) 16).

15. The method of claim 14,
Wherein said opening region (21) is formed by a recess, perforation or cutting line (30).

delete

15. The method of claim 14,
Characterized in that the cover layer (17) comprises at least one bent edge (28) opposite the opening area (21).

15. The method of claim 14,
Characterized in that a cover band (26) is provided covering the opening area (21) and the cover band is overmolded by the plastic material (22).

15. The method of claim 14,
Characterized in that the opening area (21) is formed by a zip fastening device or comprises a zip fastening device.

15. The method of claim 14,
Characterized in that the cover layer (17) is made of an extruded plastic material.