KR20120012382A - Blister packing machine and blister pack - Google Patents

Abstract

PURPOSE: A blister packing device and a blister pack are provided to prevent damage to blister materials when stripping a plastic material. CONSTITUTION: A blister packing device comprises one or more injection stations. The injection station over-molds an opening section(21) of a blister pack with a plastic material(22). An opening tab(23) is injected from the plastic material when the plastic material is injected. The injection station unites the opening tab and the plastic material.

Description

Blister Packing Machine and Blister Pack {BLISTER PACKING MACHINE AND BLISTER PACK}

The present invention relates to a blister packaging machine and a blister pack for packing an object in a blister pack.

Such blister packs are known in a number of implementations. In addition to toothbrushes, interdental toothbrushes, mascara brushes or other cosmetics or hygiene products, many other items can be packaged in blister packs, such as electronic devices, memory cards, toys, medical products or especially household products such as sweets. Generally, the goods to be packed are placed in blister pockets closed by a cover layer of cardboard material. A folded blister may also be provided in which the blister material is folded 180 ° and the blister pocket is closed by the blister material.

However, a problem with all of the prior known blister packs is that opening of such blister packs is difficult. In most cases, scissors are needed to cut the blister pack over its entire length in the area of the blister pocket. This method is cumbersome and the edges of the cut blister material are sharp, which increases the risk of injury. When trying to tear apart a blister pocket from a cover layer of carton material, most of the carton layer remains in the blister. In the case of blister packaging in which the cover layer of cardboard material contains perforations which may be stamped for opening the blister pack, this is also relatively cumbersome, since the perforated portion of the cover layer is first pressed into the blister pocket and thus packed. This is because things that can be damaged.

Using a device known from DE 10 2007 041 948 A1, plastic material can be injected onto blister packaging. Such plastic materials preferentially fulfill the decorative purpose. Blister packs produced using such devices are simply unopened and are not intended for such use.

It is therefore an object of the present invention to provide a blister packaging machine of the kind mentioned at the outset, and to be able to produce a blister pack that is easy to open using such a machine. In addition, another object of the present invention is to provide a blister pack having a simple opening.

A solution according to the present invention for this problem is to provide a blister packaging machine for overmolding the opening area of a blister pack with a plastic material and for opening an opening tab from the plastic material or opening it with the plastic material upon injection of the plastic material. At least one injection station is provided for engaging the tab. The protruding opening tab serves as a handle and can be easily grasped when the blister pack is opened. The unsealed tab is peeled off to remove the injected plastic material and the blister pack opens when the opening area is exposed. 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.

DE 10 2007 041 948 A1 states that the recesses in the foil or cover layer can be overmolded with plastic material, but here they are used for the trial operation of the buttons of the remote control, for example packaged in a blister pack. We will talk about recesses in size. These recesses do not form an opening area to pass through so that the packaged object can be taken out.

In front of the injection station it is suitable for the device to insert a recess, perforation or cutting line into the blister pack as an opening area. The opening area can be tailored to the material placed in the blister pack and the material of the blister pack in relation to its size. In the case of a perforation, the perforation can be formed comprising two perforation lines suitably parallel to each other at intervals of several millimeters, the perforation lines being located along one side of the blister pocket or around the entire blister pocket. . The plastic material injected through the perforation is combined with the blister material positioned between the perforation lines during the injection, and when the extruded plastic material is peeled off, the blister material located between the perforation lines is peeled together and the blister pack is opened. The blister pockets can be flipped upwards or towards the periphery or completely removed to remove the packaged goods.

In the case of many blister packs, the blister pocket is formed by closing the article to be packaged into the blister pocket and then closing with the cover layer of carton or Tyvek®-foil material. In the case of such a blister pack, it is suitable that a sealing station for coupling the blister pocket and the cover layer is disposed in front of the injection station.

In the manufacture of foldable blisters in which the blister material is folded and closed with the sides facing each other, it is suitable for the device to fold the blister part forming the blister pack in front of the injection station. The contact areas when the adjacent sides side by side fold together form an opening area, which is overmolded with plastic material. It may be a border area when the outer contours of the sides facing each other are the same, or may be a contact area on one of the plane sides when the sides are formed differently. In addition, a cut line or perforation can be inserted in one of the sides, which is overmolded with plastic material as an opening area, while the outer edges of the blister material are fixedly interlocking and which remain even after opening of the blister pack. It is also possible.

The inventive idea contemplates that an injection station is formed for at least partial overmolding of additional elements arranged in the opening area. This may be for example an RFID transponder for article theft prevention. When opening the blister pack, these additional elements may be removed and / or destroyed together when the injection-coated plastics material is peeled off.

Plastic material can be injected into the additional functional members, which are, for example, membranes for pressure balance between the inner space of the blister pocket and its surroundings, which is important when transporting larger blister packs to the aircraft. can do. Or the functional member has a valve for gas injection of the object or a valve for liquid exchange in the blister pocket. It is also possible to have a holder or an alignment member for the blister pack. An insulation flag may also be considered that is disposed between the contacts of a battery-powered object and that engages the plastic material during injection of the plastic material. When the blister pack is opened, the insulation is removed when the plastic material is torn, so that the object is in contact with the battery while the object is ready for operation, while the battery is not in contact with the battery and is not electrically charged. On the other hand, the contacts can be used to contact the packaged goods without the battery from outside, for example, to test and inspect the packaged goods without having to take them out of the package, for example by means of contacts located on a sales desk and connected to a voltage source. May come outwards. In addition, a pushbutton or magnet may be provided for closing the blister pack again. Such a functional member may be installed in the opening region or in such a region of the blister pack, for example an alignment member may be installed at the lower edge of the blister pack.

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

On the injected plastic material or on the plastic material side, original seals, freshness seals indicating storage periods, braille marks, logos, texts or similar symbols may be provided using a processing device arranged later. .

An apparatus for inserting the through hole in the blister pack may be arranged in front of the injection station. Thus, the injection may be performed through the through-holes on both sides of the blister pack using only one injection station.

The injection station may suitably be formed for injecting plastic material on the part of the object to be packaged or on a part of the object. For example, an interdental toothbrush packaged in a blister pocket may be positioned such that the handle of the toothbrush is disposed in or near the opening area and engages with the plastic material upon injection of the plastic material. When opening the package and tearing the plastic material, the interdental toothbrush first remains combined with the plastic material, so that the interdental toothbrush exits directly from the blister pocket without being held separately. The opening area may be just the same size as the outer contour of the handle of the interdental toothbrush and the interdental toothbrush can be pulled out of the blister pack through the opening area in the longitudinal direction. After use of the interdental toothbrush, the interdental toothbrush can be put back into the opening area with the handle for drying. The blister pack serves additionally as a stand for the interdental toothbrush after the interdental toothbrush is removed. After drying, the interdental toothbrush can again be pushed back into the blister pocket together with the bristles, with a portion of the handle protruding from the opening area so that the interdental toothbrush can later be held back and removed from the blister pack.

An injection station may be formed for inserting the plastic material while injecting it into the interior space of the blister pack. This allows the packaged object to be held / retained in position and the blister pack protects against damage by the packaged object, such as a surgical scalpel, as plastic material is injected between the blister material and the object. Can be.

In addition, the injection station may be configured to couple the plurality of blister packs to each other. The interlocked blister packs can be displayed on the merchandise stand, and the customer can take 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 independent of each other in a single blister pack may be provided with one opening area, for example, a packaging of a replacement head-toothbrush and a plurality of individually removable toothbrush heads. So for

Using a device for separating the individual blister packs from each other and from the blister webs, the plastic material is first injected in an injection process using a single injection station in two adjacent blister packs, and then blister packs. Are separated in the area of the injected plastic material, leaving the plastic material in the two blister packs. In addition, by cutting the areas from the blister packs, areas are formed that contain plastic material and are separated from each other, for example, areas for opening the blister packs and areas separated for purely decorative purposes.

The separation of the blister packs from one another or from the blister web can be achieved in a variety of ways, for example roller cutting, steel strip cutting, complete free cutting or single-sided drilling or double-sided drilling or such individual techniques. Combination of these may be carried out.

In particular, for the manufacture of a reclosable blister pack, it may be advantageous for the device to be placed in front of the injection station for laminating a coverband on the opening area which can be overmolded with plastic material. This coverband prevents the plastic material from contacting the cutting edge of the blister material at the opening area directly upon injection. The plastic material is attached only to areas of the blister material spaced apart from the cutting edges in accordance with the specifications of the coverband, so that when the blister pack is opened and the plastic material is peeled off, the cutting edge is not peeled outwards or only slightly peeled off. Damage to the material is prevented. It also reduces the risk of injury.

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

As the plastic material, soft TPE is generally used, so that the plastic material can be easily bent and deformed when torn. However, other plastic materials that are more curable for stabilization of the blister pack and / or for optical reasons may be used.

In view of the blister pack, a solution according to the invention is provided with an opening area closed by an extruded plastic material, wherein the plastic material comprises or engages the tear tab. As described above, the blister pack can be simply opened without scissors or tools, and there is no risk of being injured when opening the blister pack.

The opening area can in particular be formed by recesses, perforations or cut lines.

In addition to the method of a cover layer of carton, foil material or Tyvek® material, the blister pack may be formed as a foldable blister and the cover layer may be formed as a folded blister portion covering the opening area of the blister pocket. The latter of the cover layer materials can be used in particular in the medical field. The folded blister portion may be formed flat or the blister portion may comprise a blister pocket, which, together with the blister pocket of another blister portion, may form a larger receiving area for the object to be packaged. have.

In addition, the cover layer may be composed of an extruded plastic material. The plastic material may be formed of a planar member or may likewise comprise a shaped area which extends the receiving area for the article. It is also possible to form plastics as seating parts for articles. The plastic material of the cover layer is combined with the blister pocket, for example by overmolding, wherein the plastic material of the cover layer and the plastic material of the overmolding can be of the same kind or of different kinds or in particular of different colors.

It is advantageous for the cover layer to comprise at least one bent edge opposite the opening area. After the plastic material that closes the opening area is removed, the pack can be folded at the bent edge, and then the blister pocket containing the opening area can be opened, to expose the packaged object and to easily remove it. to be. At this time, if the pack is turned with the opening side facing 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 trying to place a sterile packaged surgical scalpel on an instrument table. With two bent edges spaced apart from each other, a seating area for the packaged article is formed between these bent edges so that the article is more securely seated on the package after the pack is opened and the cover layer is bent at the bent edge. And continue to be transported.

It is advantageous if a cover band is provided covering the opening area and the cover band is overmolded by a plastics material. This coverband prevents the plastic material from making direct contact with the cut edge of the blister material at the opening region. The plastic material adheres to the areas of the blister material positioned in accordance with the specification of the coverband while being spaced apart from the cutting edge, so that when the blister pack is opened and the plastic material is peeled off, the cutting edge is not peeled outwards or slightly Peel off and damage to blister material is prevented. In addition, the risk of injury is reduced. The ends of the cover band form an opening tab, so that the plastic material is peeled off indirectly through the cover band located beneath it.

It may also be suitable for the opening region to be formed of a zippered lock or to include a zippered lock. The blister pack can serve as a reclosable container and can serve as a transfer bag for an electronic device, for example. It is also contemplated that blister packs may be used, for example, as return delivery packs for sterile packaged surgical instruments, which are contained in a reclosable blister pack and returned to the manufacturer for disposal or disposal after use. And resterilized.

The blister pack according to the present invention may comprise each or a plurality of features mentioned in the description of the blister packaging machine according to the present invention, and may include, for example, magnets or push buttons or other additional elements for reclosing. have.

The injection molded plastic can be used as a fragrance preservative with the fragrance inserted into the blister pocket. The fragrance is preferably volatile and does not stick to the packaged article. The fragrance is exposed when the blister pack is opened, so that the person who opens the blister pack has a corresponding olfactory sense.

Injection molded plastic materials can serve as information protection devices. For example, a software lens code or a free circuit code may be imprinted underneath the plastic material, preferably on the cover layer side, which code can only be seen by the removal of the plastic material upon opening the blister pack. In addition, the plastic material can serve as an optical protective device for the packaged object, for example in the case of a photosensor, the photosensor is protected from incident light by the plastic material.

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

1 is a highly schematic diagram of a blister packaging machine according to the invention comprising a plurality of processing stations.
2 is a side view and a plan view of a cover layer of a blister pack.
3 is a side view and a plan view of a blister foil.
Figure 4 is a side view and a plan view of a blister pack with a toothbrush packaged therein.
5 is a side view and a plan view when the plastic material is injected into the blister pack of FIG.
FIG. 6 is a side view and a plan view when the edge region is removed and cut in the blister pack of FIG. 5.
7 is a longitudinal sectional view of a blister pack including an overmolded cover band.
8 is a plan view of the blister pack of FIG. 7.
9 is a cross-sectional view of the blister pack of FIG. 7.
10 is a partially enlarged view of the cross-sectional view of FIG. 9.
11 is a longitudinal sectional view of the blister pack from which the overmolding part is removed.
12 is a plan view of the blister pack of FIG. 11.
FIG. 13 is a front side view of the blister pack of FIGS. 11 and 12.
14 is a longitudinal side view of an open blister pack.
15 is a plan view of an open blister pack.
16 is a front side view of the open blister pack.
17 is a view of a blister pack formed as a foldable blister upon packaging of an object.
18 is a diagram when the blister pack of FIG. 17 is in a closed state.
19 is a diagram when the blister packs of FIGS. 17 and 18 are in a state after opening.

The blister packaging machine, denoted by 1 in its entirety for the packaging of an object, comprises a foil roll 2 according to FIG. 1, from which the foil material 3 for blister pockets is released from the individual processing stations. Supplied to. 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 shaping device 5. The molding apparatus 5 may be formed in a known and certified manner, and may comprise a molding tool for locally receiving a foil material 3, in which a molding die is inserted and the heated foil Withdraw in the desired form.

Behind the shaping device 5 is arranged a first device 6a for inserting recesses, perforations or cut lines into the foil material 3 as opening areas. The opening region is overmolded with a plastic material in the first injection station 7a disposed behind, and at the same time an opening tab, not shown in FIG. 1, is formed or as a separate member, joins with the injection molded plastic material. Injection into the side, on top or inside can be effected as a functional member, decorative element or similar injection product. The plastic material may be injected into the inner hole of the molded foil portion as a seating member and for the purpose of keeping the object to be packaged in place in the blister pocket better.

The injection station 7a does not necessarily have to be arranged in the arrangement shown, for example, it can be arranged underneath the foil material 3 so that injection takes place on the opposite side of the foil material 3.

After injecting the foil portion into the plastic material, the object to be packaged, for example a toothbrush, is inserted into the inner hole of the blister-shaped foil portion at the insertion station 8 and the blister pocket at the additional processing stations 9 and 10 is covered. It is provided with a layer and coupled thereto, and the blister pack is closed. The cover material 11 for the cover layer is supplied 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 overmolded with plastic material using the additional injection station 7b. This can be done additionally or alternatively for the device 6a and the injection station 7a described above. The opening area may be provided in the blister material and / or in the cover layer.

Likewise, additionally or alternatively, an apparatus 6c for insertion of the opening area after the processing station 10 for joining the blister pocket with the cover layer and an injection station 7c for overmolding such opening area. ) May be provided.

At this point the blister pockets hanging side by side as a blister web are separated into individual blister packs at the separation station 14 and then removed from the apparatus 1. In subsequent production processes individual blister packs may be fed to an additional processing device 15, for example a repackaging device.

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

2 to 6 show the individual completion steps for the manufacture of the blister pack 16. FIG. 2 shows a cover layer 17 and FIG. 3 shows a foil portion 19 with a blister pocket 18 for the reception of the article 20 to be wrapped (FIGS. 4-6). As can be seen from the plan views of FIGS. 3 and 4, perforations of double lines are inserted into the foil portion 19 parallel to the longitudinal side of the blister pocket 18 as the opening region 21. The foil portion 19 and the cover layer 17 are bonded to each other, for example glued or welded, where such bonding is only in the peripheral region of the blister pocket 18 and the opening area 21. The area of the foil portion 19 including the opening area 21 and the area between the opening area 21 and the blister pocket 18 are not joined with the cover layer 17.

In FIG. 5, the opening region 21 is overmolded with a plastic material 22, wherein the plastic material 22 comprises a protruding unopened tab 23 at its distal end. The plastic material 22 is injected into the foil portion 19 and the cover layer 17 via the straight through holes 31a and 31b so that the plastic material 22 according to the side views of FIGS. 5 and 6 is blister pack. The cover layer side of 16 is reached. To clarify the dimensions and arrangement of the plastic material 22 injected on the sides, the perforations are indicated by dashed lines in FIGS. 5 and 6.

6 shows a finished and punched blister pack 16 in which excess edge regions are cut and the hang tab 24 is formed with a corresponding depression. By this depression, the plastic material 22 covering the opening area 21 is separated from the plastic material 22 in the area of the hanger tab 24. Two regions are formed comprising the plastic material 22 injected on the side, and these regions can be injected using a single injection station via a single injection point 25 (FIG. 5) in the injection process. .

For opening of the blister pack 16, the plastic material 22 can be peeled off from the protruding opening tab 23. At this time, the foil material is removed along with the plastic material 22 and is torn off between the perforation lines attached to the plastic material 22. The opening thus formed allows the article 20, here the toothbrush, to be taken out of the blister pack 16.

7-16 show another embodiment of a blister pack 16. This blister pack 16 also includes a blister pocket 18 and a cover layer 17 on which the article 20 is placed. The opening area 21 is formed by a cutting line, which extends over the entire length of the blister pocket 18 (FIGS. 10, 12, 13).

As can be seen in the detail according to FIG. 10, the cutting line of the opening area 21 is covered with a cover band 26 such that the injected plastic material 22 is between the front sides of the blister material towards each other. It does not reach and engages the blister pocket 18 only on the upper side. As a result, when the plastic material 22 covering the opening area 21 is peeled off when the blister pack 16 is opened, the edge of the blister pocket 18 is not peeled outwards, so that a sharp edge may be injured. Edges do not occur. In addition, the plastic material 22 is easily peeled off. In FIG. 7 a storage member 27 of plastic material is provided in the interior space of the blister pocket 18, which holds the object 20 in place and the blister pocket 18 is surgically placed therein. It protects against damage by an object 20 such as a scalpel. This storage member 27 engages with the plastic material 22 closing the opening area 21 so that this storage member is likewise removed when the plastic material 22 is peeled off.

7 to 10 show a closed blister pack 16. 11 to 13, the plastic material 22 is removed together with the cover band 26 and the opening area 21 is exposed. The cover layer 17 can be folded at the bent edge 28 (FIG. 16) to take out the article 20. Half of the blister pocket 18 separated at the cutting line of the opening area 21 is opened while being folded at the side, and the internal space of the blister pocket 18 can be exposed. 15 and 16, the area around the bend edge 28 is shown slightly enlarged proportionally to show more clearly.

 Using the blister pack 16 in this manner, it is possible to take the object out of the blister pack 16 without holding the object 20, with the opening area 21 aligned downwards on the seating surface and covering layer The article 20 is bent at the bend edge 28 so that the article 20 comes out of the blister pocket 16.

17-19 show a blister pack 16 formed as a foldable blister. The foil portion 19 comprises two features 29, which are folded and folded together to form a blister pocket 18 (FIG. 18) for the reception of the article 20. In the portion of the foil portion 19 forming the upper side of the blister pack 16 a perforation or cut line 30 for the formation of the opening area 21 is inserted, which is overmolded with plastic material 22 on the outside (FIG. 18). The plastic material 22 includes a protruding tear tab 23 as a handle. The rim side contact surfaces of the foil portions folded together outside of the cutting line 30 are joined together, for example glued or welded, to close the blister pack 16. In contrast, the contact surface located inside remains uncoupled, and the tear tab 23 at the top forming portion is peeled off, at which time the cutting line 30 in which the plastic material joins the lower portion of the foil portion 19. The outer blister pack 16 (FIG. 18) can be opened while being torn away from the foil area on the border side and the remaining area of the upper foil area flipped 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: forming 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: machining station
11: cover material 12: roll material
13: deflection roll 15: additional processing device
16: Blister Pack 17: Cover Layer
18: blister pocket 19: foil part
20: object 21: opening area
22: plastic material 23: opening tab
24: Hanger tab 25: Injection point
26: cover band 27: storage member
28: bend edge 29: shape
30: cutting line 31a, 31b: through hole

Claims (20)

In a blister packaging machine 1 for packaging an object 20 in a blister pack 16,
Overmolding the opening area 21 of the blister pack 16 with a plastic material 22 and injecting the tear tab 23 from the plastic material 22 or upon injection of the plastic material 22. A blister packaging machine (1), characterized in that at least one injection station (7a, 7b, 7c) is provided for joining the tear tab and the plastic material (22). The method according to claim 1,
An apparatus 6a, 6b, 6c is arranged in front of the injection station 7a, 7b, 7c for inserting recesses, perforations or cut lines as opening areas 21 in the blister pack 16. Blister packaging machine. The method according to claim 1 or 2,
A blister packaging machine, characterized in that an arrangement for folding the foil part (19) forming a blister pack (16) is arranged in front of the injection station (7a, 7b, 7c). The method according to claim 1,
The injection station (7a, 7b, 7c) is formed for at least partially overmolding the additional members disposed in the opening area (21). The method according to claim 1,
A blister packaging machine, characterized in that a sealing station (9, 10) is arranged in front of the injection station (7a, 7b, 7c) for joining the foil portion (19) with the cover layer (17). The method according to claim 1,
Additional injection for injecting cover layer 17 from the plastic material in front of the injection stations 7a, 7b, 7c for overmolding the opening area 21 of the blister pack 16 with plastic material 22. Blister packaging machine, characterized in that the station is arranged. The method according to claim 1,
A blister packaging machine, characterized in that 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,
A blister packaging machine, characterized in that an arrangement for inserting a through hole in said blister pack (16) is arranged in front of said injection station (7a, 7b, 7c). The method according to claim 1,
The injection station (7a, 7b, 7c) is formed for injecting the plastic material (22) into an article to be packed (20) or to a part of the article (20). The method according to claim 1,
The injection station (7a, 7b, 7c) is formed for injecting the plastic material (22) into the interior space of the blister pack (16). The method according to claim 1,
The injection station (7a, 7b, 7c) is formed for joining a plurality of blister packs (16) to each other. The method according to claim 1,
A blister packaging machine, characterized in that an apparatus (14) is provided for separating the individual blister packs (16) from one another and / or also from the blister web. The method according to claim 1,
In front of the injection stations 7a, 7b, 7c a device is arranged for applying a cover band 26 on 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 article (20) and a cover layer (17) for closing the blister pocket (18),
An opening area 21 is provided, which is closed by the extruded plastic material 22, the plastic material 22 comprising a tear tab 23 or engaging a blister pack 23. ). The method according to claim 14,
Blister pack, characterized in that the opening area (21) is formed by recesses, perforations or cutting lines (30). The method according to claim 14,
The blister pack (16) is formed as a foldable blister, and the cover layer is formed of a blister portion folded while covering the opening area (21) of the blister pack (16). The method according to claim 14,
The blister pack, characterized in that the cover layer (17) comprises at least one bent edge (28) opposite the opening area (21). The method according to claim 14,
A cover band (26) is provided covering said opening area (21), said cover band being overmolded by said plastic material (22). The method according to claim 14,
The opening area (21) is a blister pack, characterized in that formed with a zipper lock or comprises a zipper lock. The method according to claim 14,
The cover layer (17) is a blister pack, characterized in that composed of an injection plastic material.

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