Vertical flow wrapping machine with asymmetrically shaped shoulders

Abstract

The invention relates to an improvement of a vertical flow packaging machine (1) for producing packages (7) from packaging material (4), having a profiled filling tube (2) with profiled shoulders (3), having longitudinal sealing means (5), having transverse sealing / cutting means (6) and means for attaching reclosing means (11) to the packaging material (4). The invention also relates to a method for producing packages (7) from flat packaging material (4).

Description

TECHNICAL FIELD

[0001] The invention relates to an improvement of a vertical flow packaging machine producing packages from packaging material, having a plastic filling tube with a plastic shoulder, having longitudinal sealing means, having transversal sealing / cutting means, and having means for attaching reclosure means to the packaging material. The invention further relates to a method of producing packages from planar packaging material. BACKGROUND

[0002] A common method of producing packages from a web of packaging material is the use of a vertical flow packaging machine. Such a packaging machine receives a continuous flat sheet, for example a film of plastic material, for example a thermoplastic material, paper or a paper-like material, which is continuously or intermittently conveyed and is shaped into a tube, i.e. into a tube of packaging material, by being wrapped around a vertical plastic filling tube of the packaging machine. After being wrapped around the vertical plastic filling tube, the web of packaging material is closed longitudinally by applying longitudinal seals to the packaging material, in particular by heat-sealing the transversal / longitudinal edges of the web of packaging material or in the vicinity thereof, thereby connecting them. This is done by so-called longitudinal sealing means. The tube of packaging material usually has a rectangular, oval or circular cross-section or any other face. Usually, the tube of packaging material is closed by transversal sealing means, preferably in a direction perpendicular to the direction of flow of the packaging material, i.e. transversally. Thereby, individual packages are delimited from the continuous tube of packaging material. Products, for example food products, are introduced by passing them through the plastic filling tube and into the tube of packaging material surrounding the plastic filling tube. During the filling process, the tube of packaging material is opened transversally at its upper end, i.e. without a transversal seal. Subsequently and / or simultaneously, the tube of packaging material with its products is moved downwards and a transversal seal of the top is formed above the products, thereby producing a sealed package. As a final step, or simultaneously with the application of the top seal, the package is separated from the tube of packaging material by cutting means. Now, the package usually comprises reclosure means which have to be attached to the packaging material. SUMMARY

[0003] It is therefore an object of the present invention to provide a vertical flow packaging machine and a device for attaching reclosure means to the packaging material.

[0004] This object is achieved by providing a vertical flow packaging machine producing packages from packaging material, having a plastic filling tube with a plastic shoulder, having longitudinal sealing means, having transversal sealing / cutting means, and having means for attaching reclosure means to the packaging material, wherein the plastic shoulder is an asymmetric plastic shoulder, wherein the means for attaching reclosure means to the packaging material are at least partially arranged within the vertical boundaries of the asymmetric plastic shoulder.

[0005] The disclosure relating to the present embodiment of the invention also applies to the inventive method and vice versa. The subject matter disclosed in relation to the vertical flow pack machine can be included in the inventive method and vice versa.

[0006] The invention relates to a vertical flow pack machine having a frame and / or housing, which receives a continuous flat sheet material, for example a plastic film, for example a thermoplastic material, for example paper or a paper-like material, which is continuously or intermittently transported and downwardly through a shaping shoulder, whereby it is shaped into a tube, i.e. into a tube of packaging material, which is wrapped around a vertical shaping and filling tube of the packaging machine. After being wrapped around the vertical shaping and filling tube, the tube of packaging material is closed longitudinally by applying a longitudinal seal to the packaging material, in particular by heat-sealing the transversal / longitudinal edges of the tube of packaging material or in the vicinity thereof, thereby connecting them. This is done by a so-called longitudinal sealing device. The tube of packaging material usually has a rectangular, oval or circular cross-section or any other face. Usually, the tube of packaging material is closed by a transversal sealing device, preferably in a direction perpendicular to the flow direction of the packaging material, i.e. transversally. Thereby, individual packages are defined from the continuous tube of packaging material. Products, for example food products, are introduced by passing them through the shaping and filling tube and into the tube of packaging material surrounding the shaping and filling tube and falling onto the underlying first transversal seal. During the filling process, the tube of packaging material is opened transversally at its top end, i.e. without a transversal seal. Subsequently and / or simultaneously, the tube of packaging material with its products is moved downwardly and then a transversal seal of the top is formed above the products, thereby producing a sealed package. As a final step, or simultaneously with the application of the top seal, the package is separated from the tube of packaging material by a cutting device.

[0007] In order to reclose a package that has been opened, the vertical flow pack machine of the invention comprises a device for attaching a reclosing device to the packaging material. The reclosing device can be, for example, sealed or glued to the packaging material. The reclosing device is, for example, a zipper. The reclosing device is preferably parallel to the longitudinal seal. The reclosing device preferably comprises two parts, preferably having male and female sections that can be reversibly separated and connected. The reclosing device can be attached to the packaging material as a continuous string or as individual parts.

[0008] According to the invention, the shaping shoulder, by which the packaging material is shaped, is an asymmetric shaping shoulder. The asymmetric shaping shoulder according to the invention does not have a plane of symmetry, in particular not a plane of symmetry extending along the center plane of the shaping and filling tube.

[0009] Furthermore, according to the invention, the asymmetrically shaped shoulder has vertical boundaries, for example, an upper end and a lower end with respect to the direction of gravity. Creatively, within these vertical boundaries, for example, at the upper end and the lower end, means are provided for attaching the reclosable device to the packaging material, at least partially, preferably completely.

[0010] The means for attaching the reclosable device to the packaging material are any means that can fix the reclosable device to the packaging material, either temporarily or permanently. Preferably, the connection between the reclosable device and the packaging material is a material bond, preferably a heat seal. Preferably, the means for fixing the reclosable device to the packaging material comprise heating means for the packaging material and / or heating means for the reclosable material and / or pressing means. At least one of these means, preferably all, are provided in the vertical boundaries of the asymmetrically shaped shoulder. The heating means heat the reclosable device and / or the packaging material. Preferably, there are separate means for heating the reclosable device and separate means for heating the packaging material, which can preferably be controlled independently. The pressing means press the reclosable device and the packaging material together to facilitate or improve the material bond, preferably a seal between the reclosable device and the packaging material. The pressing means are preferably one or more pressing rollers.

[0011] The two parts of the reclosable device are preferably provided to the vertical flow packaging machine according to the invention in a connected state, for example, the male part of the reclosable device is inserted into the female part. According to a preferred embodiment of the invention, within the boundaries of the asymmetrically shaped shoulder, a material bond is formed only between one part of the reclosable device and the packaging material, while the other part of the reclosable device is not attached to the packaging material.

[0012] According to a preferred embodiment of the invention, the vertical flow packaging machine comprises further means for attaching the reclosable device to the packaging material, which are located below the vertical boundaries of the asymmetrically shaped shoulder and / or downstream of the asymmetrically shaped shoulder. Preferably, this means is arranged in parallel to the longitudinal sealing means in order to further attach the reclosable device to the packaging material and to apply the longitudinal seal at least partially simultaneously. The further means preferably complete and / or improve the initial attachment of the reclosable device at the packaging material. In this way, both parts of the reclosable device are connected, preferably permanently, to the packaging material, preferably on opposite sides of the packaging material tube or of the formed package.

[0013] According to a preferred embodiment of the invention, the asymmetrically shaped shoulder comprises a vertical portion and / or a substantially vertical portion. Preferably, the heating means for the packaging material and / or the pressing means are arranged at or adjacent to the vertical portion of the asymmetrically shaped shoulder.

[0014] Preferably, the means for attaching the reclosable device to the packaging material are not attached, in particular not directly connected, to the asymmetrically shaped shoulder and / or to the shaping and filling tube.

[0015] The problem is also solved in a method for producing a package from a flat packaging material produced from a packaging material tube with asymmetrically shaped shoulders, the ends of which are connected by longitudinal seals with longitudinal sealing means, wherein a first transverse seal is provided at the packaging material tube by transverse sealing means, and wherein the packaging material tube is filled with a product before a second transverse seal is provided at the packaging material tube, and the filled package is separated from the packaging material tube by cutting means, and wherein a reclosing means is provided parallel to the longitudinal seals, wherein the reclosing means is attached to the packaging material within the vertical boundaries of the asymmetrically shaped shoulders.

[0016] The disclosure relating to the present embodiment of the invention also applies to the method of the invention, and vice versa. The subject matter disclosed in relation to the vertical flow packaging machine can be included in the method of the invention, and vice versa.

[0017] The invention relates to a method of operating a vertical flow packaging machine having a frame and / or housing, which receives a continuous flat sheet of material, for example a film of plastic material, for example a thermoplastic material, for example paper or a paper-like material, which is continuously or intermittently conveyed and downwardly through a shaping shoulder, so as to be shaped into a tube, i.e. into a packaging material tube, which is wrapped around a vertical shaping and filling tube of the packaging machine. After being wrapped around the vertical shaping and filling tube, the packaging material web is closed longitudinally by applying longitudinal extending seals to the packaging material, in particular by heat sealing the transverse / longitudinal edges of the packaging material web or in the vicinity thereof, so as to connect them. This is done by so-called longitudinal sealing means. The packaging material tube usually has a rectangular, oval or circular cross-section or any other face. Usually, the packaging material tube is closed by transverse sealing means, preferably perpendicular to the flow direction of the packaging material, i.e. transversely closed. Thereby, individual packages are delimited from the continuous packaging material tube. The product, for example a food product, is introduced by passing it through the shaping and filling tube and into the packaging material tube surrounding the shaping and filling tube and falling onto the underlying first transverse seal. During the filling process, the packaging material tube is opened transversely at its upper end, i.e. without a transverse seal. Thereafter and / or simultaneously, the packaging material tube with its product is moved downwardly and then a top transverse seal is formed above the product, so as to result in a sealed package. As a final step, or simultaneously with the application of the top seal, the package is separated from the packaging material tube by cutting means.

[0018] In order to reclose a package that has been opened, the vertical flow packaging machine of the invention comprises means for attaching a reclosing means to the packaging material. The reclosing means can be, for example, sealed or glued to the packaging material. The reclosing means is, for example, a zipper. The reclosing means is preferably parallel to the longitudinal seals. The reclosing means preferably comprises two parts, preferably a male and a female part that can be reversibly separated and connected. The reclosing means can be attached to the packaging material as a continuous string or as individual parts.

[0019] According to the invention, the shaping shoulder is an asymmetric shaping shoulder. The asymmetric shaping shoulder according to the invention has no plane of symmetry perpendicular to the plane of the drawing, in particular no plane of symmetry extending along the centre plane of the shaping filling tube.

[0020] Furthermore, according to the invention, the asymmetric shaping shoulder has vertical boundaries, for example, an upper end and a lower end with respect to the direction of gravity. Creatively, within these vertical boundaries, for example, at the upper end and the lower end, means are provided for attaching the reclosing device to the packaging material. The reclosing device is attached to the packaging material as the packaging material passes through the asymmetric shaping shoulder.

[0021] The means for attaching the reclosing device to the packaging material are any means by which the reclosing device can be fixed to the packaging material, either temporarily or permanently. Preferably, the connection between the reclosing device and the packaging material is a material bond, preferably a heat seal. Preferably, the means for fixing the reclosing device to the packaging material comprise a heating device for the packaging material and / or a heating device for the reclosing material and / or a pressing device. At least one of these means, preferably all, are provided in the vertical boundaries of the asymmetric shaping shoulder. The heating device heats the reclosing device and / or the packaging material. Preferably, there is a separate device for heating the reclosing device and a separate device for heating the packaging material, which can preferably be controlled independently. The pressing device presses the reclosing device and the packaging material together to facilitate or improve the material bond, preferably the seal between the reclosing device and the packaging material. The pressing device is preferably one or more pressing rollers.

[0022] The two parts of the reclosing device are preferably provided in the connected state to the vertical flow packaging machine according to the invention, for example, the male part of the reclosing device is inserted into the female part. According to a preferred embodiment of the invention, within the boundaries of the asymmetric shaping shoulder, only one part of the reclosing device is formed into a material bond with the packaging material, while the other part of the reclosing device is not attached to the packaging material.

[0023] According to another inventive or preferred embodiment of the invention, the reclosing device is attached to the packaging material as the packaging material is formed by the asymmetric shaping shoulder.

[0024] The disclosure relating to this embodiment of the invention also applies to the inventive method, and vice versa. The subject matter disclosed in relation to the vertical flow packaging machine can be included in the inventive method, and vice versa.

[0025] According to this embodiment of the invention, the reclosing device is attached to the packaging material as the packaging material is still being formed by the asymmetric shaping shoulder, i.e. during the process of forming the planar packaging material into a packaging material tube, which has already started and has not yet been completed.

[0026] Preferably, the reclosing device is attached to the part of the packaging material that moves vertically within the asymmetric shaping shoulder.

[0027] Preferably, the reseal device is further attached to the packaging material by means, preferably sealing means, located below the vertical border of the asymmetrically shaped shoulder and / or downstream of the asymmetrically shaped shoulder. This means preferably completes and / or improves the initial attachment of the reseal device to the packaging material. In this way, both parts of the reseal device are connected to the packaging material, preferably permanently, preferably on opposite sides of the packaging material tube or of the formed package. BRIEF DESCRIPTION OF DRAWINGS

[0028] The application is now explained, by way of non-limiting examples, with reference to the drawings. These explanations apply equally to the apparatus of the application and to the method of the application.

[0029] Figure 1 A vertical form, fill and seal machine according to the application is schematically shown.

[0030] Figure 2a and Figure 2b A first embodiment of a vertical form, fill and seal machine of the application is shown.

[0031] Figure 3a and Figure 3b A first embodiment of a vertical form, fill and seal machine of the application is shown.

[0032] Figure 4 A package that can be produced with the form, fill and seal machine of the application and the method of the application is shown. DETAILED DESCRIPTION

[0033] Figure 1 A vertical form, fill and seal machine 1 according to the application is schematically shown. The vertical form, fill and seal machine is a packaging machine that shapes a web 4 of planar packaging material, for example a film web, into a packaging material tube that is shaped by a shaping shoulder 3, the packaging material tube being transported vertically downwards along a shaping fill tube 2. As can be seen in particular in Figures 2 and 3, the shaping shoulder is an asymmetrically shaped shoulder. The two ends of the packaging material tube are sealed together by longitudinal sealing means 5. Subsequently, the packaged articles are filled into the packaging material tube and transversal seals are applied to the packaging material tube by transversal sealing means 6 to enclose the packages. At the same time or after the application of the transversal seals, the final packages are cut off from the packaging material tube. The vertical form, fill and seal machine can comprise a tuck-over shaping device that shapes the bottom and / or the top of each package.

[0034] The web of packaging material 4, in particular a weldable plastic film 4, is supplied from a reel 9 which supplies the flat packaging material continuously or intermittently to a profiling shoulder 3 which shapes the web of packaging material into a tube-like shape around the profiling filling tube 2. In the context of the present invention, a "tube-like shape" of a package or packaging material means any cross-sectional shape, including a circular or other shape, in particular a rectangular or generally polygonal shape. A longitudinal sealing device 5 is arranged downstream of the profiling shoulder which seals the edges of the tube of packaging material together. Finally, a transverse seal is applied, preferably by means of a transverse sealing device 6, which extends perpendicular to the flow direction of the packaging material. These transverse sealing devices 6 not only apply an upper / second transverse seal to close the top end of the package 7, but these transverse sealing devices 6 advantageously, preferably simultaneously, provide a lower / first transverse seal to define the bottom of the package 7 further upstream. The produced packages 7 are separated from each other by cutting devices which are preferably incorporated in the transverse sealing devices 6. Between each package in which a bottom and a top transverse seal are applied, the package is filled with a product, preferably an edible product.

[0035] According to the invention, a reclosing device 11, for example a zip, is attached to the packaging material. This attachment, preferably a pre-attachment, is achieved by Figure 2a , the devices 10, 12, 13 described in detail in Figure 3a , figures b and Figure 4 It is shown that the reclosing device is preferably parallel to the longitudinal seal 18.

[0036] Figure 2a and Figure 2b shows details of the flowpack machine 1 of the invention or of the first embodiment of the method of the invention. Figure 2b depicts Figure 2a the "view A" shown. As shown in these figures, an asymmetric profiling shoulder 3 is provided at the profiling filling tube 2 which is vertical. The direction of gravity is from the top to the bottom of these figures. The asymmetric profiling shoulder 3 does not have a vertical plane of symmetry, in particular not on the vertical centre axis 14 of the profiling filling tube. From Figure 2a it can in particular be seen that the part of the asymmetric profiling shoulder on the left of the vertical plane of symmetry along the vertical centre axis 14 is different from the part on the right of the vertical plane of symmetry along the vertical centre axis 14. From Figure 2aIt can further be specifically seen that the asymmetric shaping shoulder has a vertical extension 17, which is delimited by a high boundary or upper end 15 and a low boundary or lower end 16. Furthermore, the asymmetric shaping shoulder preferably has a vertical or substantially vertical straight portion 21. The packaging material 4, initially a planar web, is drawn through the asymmetric shaping shoulder 3, thereby forming a tube of packaging material extending around the shaping fill tube 2. The tube of packaging material is transported vertically downwards, as indicated by arrow 20, downstream of the asymmetric shaping shoulder 3. The transportation of the tube of packaging material can be continuous or intermittent.

[0037] According to the present invention, the vertical flow packaging machine of the present invention comprises means 10, 12, 13 for attaching a reclose means 11, such as a zipper, to the packaging material 4. Typically, the reclose means comprises two parts, which can be reversibly connected together to close the package, or separated to open the package. The attachment provided by the means 10, 12, 13 can be an initial or final connection required for the package 7. In Figure 2a and Figure 2b In the example shown, the zipper is a continuous strip, which is cut into segments after attachment to the packaging material. In this example, the attachment of the reclose means 11 to the packaging material 4 is achieved by heat sealing. Accordingly, at least one heating means 10, 13 is provided, here two heating means 10, 13 are provided, which heat the reclose means 11 and / or the packaging material 4. Furthermore, optionally, at least one pressing means 12 is provided, here pressing rollers are provided, preferably two pressing rollers, which press the reclose means 11 and the packaging material 4 together to facilitate or improve the material bond thereof. The skilled person understands that depending on the materials used, one heating means 10, 13 can be sufficient and / or the pressing means 12 can be omitted. The skilled person further understands that the means for attaching the reclose means to the packaging material can also be an adhesive means or any other means for attaching the reclose means to the packaging material.

[0038] The attachment of the reclose means at the packaging material provided by the means for attaching the reclose means to the packaging material is preferably a pre-attachment, i.e. an initial attachment which is further improved by other sealing means downstream of the asymmetric shaping shoulder.

[0039] According to the present invention, the means for attaching the reclose means to the packaging material are now provided within the vertical boundaries 15, 16 of the asymmetric shaping shoulder or within the vertical extension of the asymmetric shaping shoulder. If the means for attaching the reclose means to the packaging material comprises multiple components, such as components 10, 12, 13 in the present example, at least one component, preferably more than one, and more preferably all components 10, 12, 13 are located within these vertical boundaries.

[0040] In the present case, the heating device 10 heats the packaging material at the location where the reclose device should be attached. The heating device 13 heats one surface of the reclose device 11. Here, both heating devices 10 and 13 are arranged within the vertical border of the asymmetric shaping shoulder. Downstream of the heating devices 10, 13, but still within the border of the asymmetric shaping shoulder, the heated surfaces are pressed together by one or two, preferably two, pressing devices, here pressing rollers.

[0041] Preferably, the reclose device 11 is attached to the packaging material while the packaging material is still being shaped into a packaging material tube, i.e. the process of shaping the packaging material web into a packaging material tube has already started, but not yet finished, when the reclose device is attached to the packaging material.

[0042] According to a preferred embodiment of the present invention, the device for attaching the reclose device to the packaging material, in particular the heating device 10 and / or the pressing device 12, is arranged at or adjacent to the vertical portion, here the straight portion 21, of the asymmetric shaping shoulder 3.

[0043] In the present case, even though, as mentioned above, the reclose device generally comprises two portions, only a portion of the cover device 11 is attached to the packaging material within the range of the asymmetric shaping shoulder. Therefore, the vertical flowpack machine of the present invention preferably comprises further attachment devices (not shown), preferably sealing devices, which are located downstream of the asymmetric shaping shoulder 3 and, more preferably, at least partially parallel to the longitudinal sealing devices, which attach the non-attached portion of the reclose device to the packaging material and / or, even more preferably, improve the pre-attachment of the reclose device provided within the border of the asymmetric shaping shoulder. The further attachment of the reclose device and the application of the longitudinal sealing devices take place at least partially simultaneously.

[0044] Figure 3a and Figure 3b Details of a second embodiment of the flowpack machine 1 of the present invention or the method of the present invention are shown. Figure 3b depicted Figure 3a the "view A" is shown. Reference can be made primarily to Figure 2a and 2b the explanations. However, in the present case, the reclose device is provided in segments which are attached to the packaging material 4.

[0045] Figure 4A package 7 of the invention, here a bag or pouch that can be produced by a flow wrapper of the invention and / or according to a method of the invention, is shown. The arrow 20 indicates the direction of transport of the packaging material. The package 7 of the invention comprises two transverse seals 19, which are arranged transversely to the direction of transport 20 of the packaging material. Parallel to the direction of transport of the packaging material, a longitudinal seal 18 is provided at the other end of the bottom 22 of the package 7. Adjacent to the longitudinal seal 18 is a reclosable device 11, which allows the package to be reclosed and opened after the longitudinal seal strip has been removed and / or opened. As Figure 3a and Figure 3b The reclosable device 11 can be a segment that is already segmented before being attached to the package, as shown in the embodiments of Figs. 1 1 and 12. The reclosable device 11 can be shorter than the length of the package in the direction of transport 20. The container 7 can comprise a sandwich at its bottom 18.

[0046] List of reference signs

[0047] 1 vertical flow wrapper

[0048] 2 profiled filling tube

[0049] 3 profiled shoulder, asymmetric profiled shoulder

[0050] 4 packaging material, film

[0051] 5 longitudinal sealing device

[0052] 6 transverse sealing and / or cutting device

[0053] 7 package, pouch

[0054] 8 frame / housing of the vertical flow wrapper

[0055] 9 roll

[0056] 10 heating device for the packaging material

[0057] 11 reclosable device, zip

[0058] 12 compression device, compression roller

[0059] 13 heating device for the reclosable device

[0060] 14 vertical centre axis of the profiled filling tube 15 vertical boundary, upper end, upstream end of the asymmetric profiled shoulder 16 vertical boundary, lower end, downstream end of the asymmetric profiled shoulder 17 vertical extension of the profiled shoulder

[0061] 18 longitudinal seal

[0062] 19 transverse seal

[0063] 20 direction of transport of the packaging material

[0064] 21 vertical section of the shoulder of the mould 22 bottom of the package

Claims

1. A vertical flow packaging machine (1) producing packages (7) with packaging material (4), having a profiled filling tube (2) with profiled shoulders (3), having longitudinal sealing means (5), having transverse sealing means and / or cutting means (6), and having attachment means (10, 12, 13) attaching reclosing means (11) to the packaging material (4), characterized in that, The shaped shoulder is an asymmetric shaped shoulder, and the attachment means (10, 12, 13) are at least partly arranged in the vertical border (15, 16) of the asymmetric shaped shoulder, and the attachment means (10, 12, 13) for the packaging material (4) are arranged in or adjacent to the vertical part (21) of the asymmetric shaped shoulder (3).

2. The vertical flow wrapping machine (1) according to claim 1, characterized in that The attachment of the reclosing means (11) to the packaging material (4) by the attachment means (10, 12, 13) comprises heating means (10) for the packaging material and / or heating means (13) for the reclosing means and / or pressing means (12).

3. The vertical flow wrapper (1) according to claim 1, wherein, Other means are included for attaching reclosing means (11) to the packaging material (4), wherein the other means are located downstream of the asymmetric shaped shoulder.

4. A method for producing packages (7) from a planar packaging material (4) by means of a vertical flow packaging machine (1) according to any one of claims 1-3, which planar packaging material is formed into a packaging material tube by means of asymmetrically shaped shoulders (3), the ends of which are connected to longitudinal seals (18) by means of longitudinal sealing means (5), wherein, A first transverse seal (19) is provided at the tube of packaging material by a transverse sealing device (6), and wherein the tube of packaging material is filled with a product before a second transverse seal (19) is provided at the tube of packaging material, and the filled package is separated from the tube of packaging material by a cutting device, and wherein the reclosing means (11) are arranged parallel to the longitudinal seal (18), characterized in that the reclosing means (11) are attached to the packaging material (4) within the vertical border (15, 16) of the asymmetric shaped shoulder (3).

5. The method of claim 4, wherein, The reclosing means (11) are attached to the packaging material (4) when the packaging material is formed by the asymmetric shaped shoulder (3).

6. The method according to claim 4 or 5, characterized in that, The reclosing means (11) are attached to a vertically moving part of the packaging material. The reclosing means (11) are attached to a vertically moving part of the packaging material.

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