EP1795335A2 - Method for manufacturing packaging made of flexible material - Google Patents

Abstract

The method involves folding a single flexible material web (1) in the longitudinal direction and connecting the superposed layers(3) together so that at least one section of the web forms a tubular member. The individual folded edges of the tube are cut at least in part and then tubular sections of predetermined length are cut off from the web. The outer layers are folded back around the opening of the tube and the layer inbetween are shortened and a sealing element applied to these ends to contact the outer layers. After the outer layers are moved back the shorter ends are closed and each fixed on the outer layer and then predetermined areas of the superposed layers of the tubular section are bonded together. Independent claim describes flexible packaging with the upper ends of the side folds closed by separate seals.

Description

The invention relates to a method for producing a packaging material from a flexible material, in particular for producing a gusseted bag made of plastic film. Furthermore, the invention relates to a packaging material made of flexible material, in particular gusseted plastic bags, having a front wall and a rear wall, between which side folds extending over portions of their side regions are arranged which are shortened in the upper region of the packaging means, wherein the packaging means has a wrinkle-free head area between the front and rear walls.

It is known for producing a packaging made of a flexible material, for example a gusseted bag made of a plastic film, to arrange two material webs congruent to one another and to position predetermined functional elements between the material webs and possibly to bring them into contact with the material webs. Subsequently, predetermined areas of the material webs are connected to one another and the finished packaging material is separated as sections from the joined material webs. The known methods are very complex and very complicated to implement.

The invention has for its object to provide a method for producing a packaging, which is relatively easy to implement and at the same time allows a cost-effective production of the packaging.

The object is achieved by a method with the features of claim 1 and by a packaging, in particular produced according to a method according to claims 1 to 13, with the features of claim 14. Advantageous developments of the invention are specified in the respective dependent on these claims subclaims.

It is an inventive method for producing a packaging material of a flexible material provided, in particular for producing a gusseted plastic bag, in which a single flexible material web is folded in the longitudinal direction, superimposed layers of the folded material web materially connected to each other and at least a portion of the web as a piece of hose is formed, individual folding edges of the piece of material formed as a piece of tubing at least partially cut and then hose pieces of predetermined length are separated from the web, in the region of at least one opening of the piece of tubing folded over its outer layers and interposed layers of material are cut to the ends of the abridged Laying a sealing element is abandoned and brought into contact with one of the outer layers, after returning the outer layers, the shortened ends closed and a n fixed to a respective outer layer and predetermined areas of superimposed layers of the hose piece are materially interconnected.

The method according to the invention advantageously makes it possible to produce a packaging material from a material web which, by means of the method features according to the invention, enables a simple and thus cost-effective production of the packaging material.

With particular advantage, according to a development of the invention, it is provided that the material web is folded in such a way that its longitudinal sides are stacked in one of the side regions of the folded material web. Due to the advantageous folding of the material web and the juxtaposition of the longitudinal sides, in particular in the region of a gusset, the entire width of the material can advantageously be utilized.

The superimposed longitudinal sides are materially connected to each other after folding the material web. The cohesive connection creates a solid or permanent and thus advantageous secure contact between the superimposed longitudinal sides. The material bond can be done for example by a targeted supply of heat along predetermined sections of the superimposed longitudinal sides of the folded material web, wherein predetermined portions of the material web can be formed into a piece of hose.

In a further development of the method according to the invention, together with the superimposed longitudinal sides, the folded edges in the side regions of the material web are connected to one another in a material-locking manner over a predetermined section along their extension. The additional cohesive connection of all folded edges of the material web advantageously gives the hose piece produced more stability, which is why both a simplified further processing is given and the packaging material filled with the products has improved dimensional stability.

Along the materially connected folded edges, certain regions of the material web are cut off in a further processing step according to the invention. The cuts made on both sides of the material web, which almost equals a trimming of edge regions, advantageously open predetermined sections of the side regions of the material web. It is particularly possible that the cutting tools are brought into contact with the fold edges, for example, only at predetermined intervals, so that interrupted cutting paths along the fold edges arise.

Alternatively, according to another embodiment of the method according to the invention, predetermined sections of the folded edges are cut open. A cutting of the folded edges has the advantage that no material waste is formed at the folded edges and thus the width of the folded material web is maintained in an advantageous manner.

The pieces of tubing are severed from the web such that the opened side portions are formed as sections of different length at a respective end of each piece of tubing. The individual formation of the open side areas at the respective ends of each piece of tubing by means of cutting the pieces of tubing and allows for their further processing an advantageous embodiment of the tube pieces, so that the completion of the packaging, in particular the cohesive connection at the ends of the side areas, performed simplified with advantage can be. It is of course possible to vary or adapt the length of the ends of a piece of tubing opened in the side areas during manufacture.

The separated piece of tubing is rotated in its horizontal position for further processing by 90 degrees. Due to the made rotation of each piece of tubing in a constant transport direction is given the opportunity to carry out further processing steps on both sides of the conveyor belt in an advantageous manner. This leads to a further simplified production or a shortened manufacturing process of the packaging. It is also possible, after separating the pieces of hose from the material web to transport the individual pieces of tubing with unchanged orientation at an angle of about 90 degrees to the original direction of movement on.

At the ends of each piece of tubing, the outer layers are folded in the region of both tube openings and the layers of the material located between them are shortened. The shortening of the gussets in the upper region has the advantage that a wrinkle-free head region between the outer layers, which form the front or rear wall of the packaging, is provided. In the lower region of the piece of tubing, which is formed as a bottom region of the packaging, the gussets can also be shortened by a predetermined amount, which can advantageously allow a cohesive connection of the tube opening in the bottom region over the entire width of the outer layers. At the same time, increased stability of the packaging material in the bottom area is ensured. The use of costly punching tools, for the production a breakthrough in the lower region of the gusset, by means of which otherwise a conventional connection of the side regions in the bottom region of the packaging material is not necessary.

According to another embodiment of the method according to the invention, in each case a sealing element is applied to the individual, upper ends of the shortened layers. Due to the use of two separate sealing elements, a smaller amount of the sealing element closing the lateral folds is required in the production of a packaging material. In addition, due to the shortened sealing elements, which are welded to the shortened layers or gussets and one of the outer layers, a corresponding amount of heat to act on a reduced area, which can be achieved at the same time an energy saving advantage.

Between the outer layers of each piece of tubing a re-closure member is inserted above the sealing elements and then connected cohesively with their inner sides. The re-closure member is introduced in particular in the side-fold-free head region of the packaging means and can be advantageously brought into contact with the heat-sensitive inner side of the outer layers of the packaging material over its entire width. The outer layers can be heated by a targeted heat in the region of the re-closure member, whereby the inner sides of the outer layers merge with the Wiederverschlußorgan and a permanent material connection can be produced.

After returning the outer layers, the open side regions of the superimposed layers in the region of the tube openings and then the outer layers are firmly bonded together with at least one of the tube openings in the edge region. In order to advantageously fix the gussets between the outer layers of the piece of tubing first, the open side regions are first preferably welded together and then the tube opening in the bottom region of each piece of tubing is sealed leak-free. It is for example possible that each hose opening in the bottom region of a respective piece of hose by means of two mutually parallel Connecting lines is closed. Due to the reinforced design of the double-sealed bottom portion, which can accommodate a higher load, thus can be produced in an advantageous manner packaging with larger dimensions.

To form a footprint in the bottom region of each packaging material protruding material is turned over and glued to one of the outer layers of the bottom area. Due to the protruding or lengthened material, the formation of a level footprint in the bottom area of the packaging is advantageously made possible, so that the individual packaging can be stored standing and it is possible, inter alia, a higher packing density during transport or storage of the stacked To reach packaging. As a protruding material, for example, the extended, outer layers of the piece of tubing can be used, which can be dispensed with advantageously on the attachment of a separate material section.

In a packaging material made of flexible material, in particular gusseted plastic bags, having a front wall and a rear wall, between which side folds extending over portions of their side regions are arranged, which are formed shortened in the upper region of the packaging, which in particular by a method according to claims 1 to 13 can be made is provided according to the invention that each upper end of the gussets is closed by a separate sealing element which fixes the respective gusset end to exactly one of the walls. The use of two separate sealing elements, which have approximately the width of a gusset, allows a simple and advantageous filling or removal of the to be wrapped or wrapped by the packaging goods. In the area between the gussets, no sealing element is applied, whereby the original flexibility of the material and thus the packaging material wall is maintained. Consequently, the area around the sealing elements can be relatively easily deformed, for example during filling, which ensures advantageous handling. Furthermore, by means of the sealing elements, a respective side fold can be fixed either to the rear wall or to the front wall of the packaging.

According to a first embodiment of the invention, it is provided that each sealing element is materially connected to a respective associated gusset and a respective packaging wall. The material connection advantageously creates a firm connection between the sealing elements, the respective lateral folds and a respective packaging wall, as a result of which individual parts or components of the packaging material can be permanently and simultaneously securely connected to one another. Preferably, the parts or components are welded together, so that the materials of the various parts enter into a non-detachable connection with each other. It is of course also possible that other methods, such as gluing, are used for joining.

With particular advantage, at least one free end of each sealing element between and at the same time spaced from the seam edges of at least the front and rear wall interconnecting side seam stopped. The shortened design of the sealing elements in the side seams of the packaging material according to the invention ensures improved tightness of the side seams. The cohesive connection of the layers to be joined together is thus no longer completely interrupted, which additionally improves the optical properties of the packaging material according to the invention. The sealing elements each end between and spaced from the seam edges of a respective side seam, wherein the sealing elements are preferably stopped in half or the middle of the side seam.

Each sealing element is a strip of material that can be brought into contact with the upper ends of the gussets and locks them firmly against one of the packaging walls. The use of a material strip in conjunction with the shortened embodiment has the advantage that, for example, a PE / PET composite film can be used as a material strip. The composite film can be produced from a plurality of film layers having different properties, wherein at least one film layer of the composite film has an advantageously low melting temperature. With appropriate heat in the region of the sealing element only this film layer goes one cohesive connection with the associated gusset and the corresponding packaging wall.

In order to ensure the quality of the wrapped by the packaging material during its storage after a first opening of the packaging material, a re-closure member is arranged in the head above the sealing elements. With the help of the re-closure member, a portionable removal of the products from the packaging can be carried out in an advantageous manner. At the same time an aroma seal is created by means of the re-closure member, which slows, for example, premature dehydration of the wrapped products or goods or reduce the moisture absorption.

The free ends of the re-closure member preferably terminate in the side seams and at the same time spaced apart from the outer edges of the side seams of the packaging so that predetermined portions of the side seams are uninterrupted. The side seams, which are formed continuously at least in some areas, increase the tightness of the packaging material according to the invention and thus a permanently consistent quality of the product received therein.

The re-closure member is formed from mutually corresponding interlocking elements, which allow a resealable sealing of the packaging. By means of the interlocking elements is given an advantageous simple embodiment of a re-closure member, wherein the interlocking elements mesh in such a way that a nearly airtight seal or closure of the packaging is ensured. A first positive locking element may, for example, have a groove into which a hook-shaped web of the second positive locking element engages over the length of its extension. It is also possible, for example, to form the reclosing member as two adhesive tapes associated with the bag walls.

According to a development of the invention it is provided that the individual interlocking elements are assigned to a respective packaging wall. The mutually corresponding interlocking elements are arranged in particular in the side-wrinkle-free head region of the packaging means on the inner sides of the front or rear wall. Preferably, a cohesive connection is created between the front and rear wall and the respective form-locking elements of the re-closure member. The fabric closure causes a firm and thus lasting hold of the interlocking elements on the insides of the packaging walls.

Each gusset is shortened in the head area and in a bottom area of the packaging. The configuration of a shortened gusset at both ends has the advantage that, in addition to the use of a reclosing member in the head area, the shortened gusset in the bottom region of the packaging allows an advantageously simple connection of the front and rear walls. Due to the shortened gusset in the bottom area, it is not necessary to provide the individual gussets in the area of the bottom weld of the packaging with an opening in order to allow a required connection of the front and rear walls.

In an advantageous embodiment, it is provided that the front and rear walls in the bottom region of the packaging are connected to each other consistently cohesively. The continuous cohesive connection of the front and rear wall in the bottom region of the packaging material advantageously ensures improved soil formation after filling of the products to be wrapped by the packaging material. Especially with packaging, which are stored or transported, for example, standing, the consistently connected front and rear wall creates an improved footprint. Preferably, the inner sides of the front and rear walls of the packaging can be welded together by a targeted heat in an edge region of the soil. Among other things, it is also possible to use further joining methods, such as gluing, for joining the areas of the packaging to be brought into contact with each other.

According to a further development of the invention, it is provided that the bottom region of the packaging means has two cohesive connecting lines running parallel to one another. The formation of two cohesive Connecting lines in the bottom region of the packaging material allows the formation of a bottom fold by means of which can produce an advantageously flat footprint of the packaging. The bottom fold can be formed for example from the extended, the side gussets in the bottom area superior front and rear walls. Optionally, the bottom fold forming portion can be turned over and bonded to the outside of one of the walls of the bottom portion of the packaging.

The bottom region has at least one diagonally extending connecting line, which connects regions of a respective lateral fold with a respectively associated packaging wall in a materially bonded manner. The diagonally extending connecting lines, which may be formed in particular as welds, connect the gussets with the packaging walls and ensure increased stability in the bottom region of the packaging and a resulting increased footprint.

Fig. 1:

eine schematische Ansicht, welche darstellt, wie eine Materialbahn gefaltet wird;

Fig. 2:

eine Schnittansicht der gefalteten Materialbahn;

Fig. 2b:

eine schematische Draufsicht der gefalteten Materialbahn mit einem stoffschlüssig verbundenen Abschnitt;

Fig. 2c:

eine Ansicht eines von der Materialbahn abgetrennten Schlauchstückes;

Fig. 3a:

eine Ansicht des zur Weiterverarbeitung in der Ebene um 90 Grad gedrehten Schlauchstückes;

Fig. 3b:

eine schematische Draufsicht, welche darstellt, wie die äußeren Lagen des Schlauchstückes umgeschlagen werden;

Fig. 3c:

eine Draufsicht des Schlauchstückes mit seinen gekürzten Seitenfalten;

Fig. 4a:

eine schematische Ansicht, welche darstellt, wie die äußeren Lagen im Bodenbereich zurückgeschlagen und auf die oberen Enden der Seitenfaltendichtelemente aufgegeben werden;

Fig. 4b:

eine Ansicht des Schlauchstückes mit verbundenen Seitenendabschnitten im Bodenbereich und einem eingesetzten Wiederverschlußorgan im seitenfaltenfreien Kopfbereich des Schlauchstückes;

Fig. 4c:

eine schematische Ansicht, welche darstellt, wie die Dichtelemente und das Wiederverschlußorgan im Kopfbereich stoffschlüssig mit dem Schlauchstück verbunden und Kernnähte im Bodenbereich erzeugt werden;

Fig. 4d:

eine schematische Darstellung des Packmittels mit geschlossenem Bodenbereich und verbundenen Seitenendabschnitten im Kopfbereich, und

Fig. 5:

eine perspektivische Ansicht eines erfindungsgemäßen Packmittels mit verkürzten Seitenfalten zwischen den Packmittelwänden.

An embodiment of the method according to the invention and an embodiment of the packaging according to the invention, from which further inventive features arise, are shown in the drawing. Show it:

Fig. 1:

a schematic view illustrating how a material web is folded;

Fig. 2:

a sectional view of the folded material web;

Fig. 2b:

a schematic plan view of the folded material web with a materially connected portion;

Fig. 2c:

a view of a separated piece of material from the piece of tubing;

Fig. 3a:

a view of the rotated for further processing in the plane by 90 degrees tube piece;

3b:

a schematic plan view illustrating how the outer layers of the tube piece are handled;

3c:

a plan view of the hose piece with its shortened side folds;

Fig. 4a:

a schematic view illustrating how the outer layers are knocked back in the bottom region and applied to the upper ends of the Seitenfaltdichtelemente;

Fig. 4b:

a view of the hose piece with connected side end portions in the bottom region and an inserted re-closure member in the side-wrinkle-free head portion of the hose piece;

4c:

a schematic view showing how the sealing elements and the re-closure member in the head area cohesively connected to the hose piece and core seams are generated in the bottom area;

4d:

a schematic representation of the packaging with closed bottom area and connected side end portions in the head area, and

Fig. 5:

a perspective view of a packaging according to the invention with shortened gussets between the packaging walls.

1, a material web made of a flexible material is designated in FIG. 1, which can be unwound, for example, from a roll 2. The material web 1 is folded in its longitudinal direction, wherein a plurality of superposed layers 3 are formed, of which two inner layers are formed as side gussets. The folded material web 1 is similar to a hose, wherein in a side region 4, the longitudinal sides 5, 6 of the material web 1 are stacked.

In Fig. 2 is a section through the folded material web 1 is shown and illustrate its structure. Fig. 2 shows the various layers 3 of the folded material web 1, wherein the material web 1 is folded such that the longitudinal sides 5, 6 and the folded edges 7, 8, 9 form the side edges of the folded material web. Furthermore, Fig. 2 illustrates that the folded material web 1 has two outer layers 10, 11 and in the side regions 4, 12 respectively arranged therebetween formed as side gussets layers 13, 14.

In Fig. 2b shows how the folded web of material 1 in the side regions, in particular the longitudinal sides 5, 6 and the folding edges 7, 8, 9, are materially connected to each other over a predetermined portion of their extension. Subsequently, the material web is trimmed at the edges of its side regions, so that in sections 15, 16 of the folded material web 1, which are not materially interconnected in the side regions 4, 12, the layers 10 and 13 and the layers 11 and 14 in the Side areas are separated from each other and thus are open.

Fig. 2c shows a separated from the web of material 1 piece of tubing 17, which is supplied for further processing.

As Fig. 3a illustrates, each piece of tubing 17 is rotated 90 degrees prior to further processing in the horizontal plane so that in particular a head portion 18 and a bottom portion 19 are accessible for further processing.

In Fig. 3b is shown how the outer layers 10, 11 are knocked back both in the head portion 18 and in the bottom portion 19 and thus the inner layers 13, 14 protrude.

Fig. 3c is intended to illustrate that the protruding inner layers 13, 14 are shortened in the head area 18 and in the bottom portion 19. In this case, the inner layers 13, 14 in the areas 18, 19, as shown in FIG. 3c, be shortened different lengths.

After the shortening, the outer layers 10, 11 are returned in the bottom area, wherein, as shown in FIG. 4a, only one outer layer 11 is folded back in the head area and onto the upper ends of the inner layers 13, 14, which are also referred to as gussets Seal element 20 is applied.

In the schematic side and plan view 4b is shown how in the bottom region of the tube piece 17, the returned layers 10, 11 with the respective inner layers 13, 14 in the side regions 4, 12 are materially connected. In the head area above the shortened inner layers 13, 14 between the outer layers 10, 11 a re-closure member 21 is used, which may be formed, for example, from each other corresponding interlocking elements.

Fig. 4c is a schematic view intended to illustrate that in the bottom portion 19 between the outer layer 10 and the inner layer 13 and between the outer layer 11 and the inner layer 14 formed as a weld transverse cohesive connection 22, 23 takes place and the corresponding layers permanently connected. In the head region 18, the sealing elements 20 are welded to the inner layers 13, 14 and the outer layer 11 after repelling the layer 10, wherein the upper end of the inner layers 13, 14 is closed by the respective sealing element 20. At the same time, the re-closure member 21 is materially bonded to the inner sides of the outer layers 10, 11.

4d shows a schematic representation of the finished packaging means, in which, in the last processing step of the method, the tube opening 24 in the bottom region of the tube piece 17 is sealed by a cohesive connection of the outer layers 10, 11. At the same time, with the closing of the outer layers 10, 11, the inner layers 13, 14 are connected to one of the respective outer layers 10, 11 and the inner layers 13, 14 formed as side folds are closed at the lower end in the bottom region 19. In the head portion 18 of the tube piece 17, the respective upper side portions 4, 12 are integrally connected to each other, so that consistently closed side portions 4, 12 of the packaging given and the space located between the outer layers 10, 11 represents a chamber delimited from the environment.

5 shows an inventive packaging means, which has a front wall 25 and a rear wall 26, which are made of a flexible material, in particular a plastic film. Between the front wall 25 and the rear wall 26 extend in a respective side region 27 gussets 28, 29 which are formed in a head portion 30 and in a bottom portion 31 each shortened. The upper ends of a respective side fold 28, 29 are each closed with a sealing element 32 and at the same time fixed to the rear wall 26. The side folds 28, 29 are connected in the edge regions 33 respectively materially connected to the front and rear walls, so that a firm and durable connection between the individual components of the packaging is given. In the side-wrinkle-free head portion 30 of the packaging a re-closure member 34 is arranged, which protects after the first opening of the packaging and a portion removal of the product enveloped by the packaging material within the packaging against the prevailing environmental conditions such as humidity or dust. The re-closure member 34, which may be formed in particular from mutually corresponding interlocking elements, forms with the inside of the front wall 25 and the rear wall 26 a cohesive connection. In order to form a smooth footprint 35 in the bottom portion 31 of the packaging, the front wall 25 and the rear wall 26 are formed extended and are brought into contact by means of two non-visible, mutually parallel cohesive connection lines. The thereby forming bottom fold 36 is turned over and bonded to the bottom portion 31 of a respective packaging.

Claims (25)

Method for producing a packaging material from a flexible material, in particular for producing a gusseted plastic bag, in which
a single flexible material web (1) is folded longitudinally,
superimposed layers (3) of the folded material web (1) connected to one another in a material-locking manner and at least one section of the material web (1) is designed as a tube piece (17),
individual fold edges (7, 8, 9) of the piece of tubing (17) formed material web are at least partially cut,
Tube pieces (17) of predetermined length are cut off from the material web (1),
in the region of at least one opening of the hose piece (17), the outer layers (10, 11) folded over and located therebetween layers (13, 14) of the material are shortened,
a sealing element (20) is placed on the ends of the shortened layers (13, 14) and brought into contact with one of the outer layers (10, 11),
after returning the outer layers (10, 11) the shortened ends (13, 14) closed and fixed to a respective outer layer (10, 11) and predetermined areas of superimposed layers (3) of the hose piece (17) are materially interconnected. A method according to claim 1, characterized in that the material web (1) is folded such that their longitudinal sides (5, 6) in one of the side regions (4, 12) of the folded material web (1) are superimposed. Method according to one of claims 1 and 2, characterized in that the superimposed longitudinal sides (5, 6) of the folded material web (1) are materially connected to one another. Method according to one of claims 1 to 3, characterized in that, together with the superimposed longitudinal sides (5, 6), the folding edges (7, 8, 9) in the side regions (4, 12) of the material web (1) over a predetermined section of their Extension materially connected to each other. Method according to one of claims 1 to 4, characterized in that along the cohesively connected folding edges (7, 8, 9) certain areas of the material web (1) are cut off. Method according to one of claims 1 to 4, characterized in that predetermined partial sections of the folded edges (15, 16) are cut open. Method according to one of claims 1 to 6, characterized in that the hose pieces (17) are separated from the material web (1) such that the opened side portions are formed as sections of different lengths at the respective ends of each hose piece (17). Method according to one of claims 1 to 7, characterized in that the severed piece of tubing (17) is rotated in its horizontal position for further processing by about 90 °. Method according to one of Claims 1 to 8, characterized in that the outer layers (10, 11) are folded over in the area of both tube openings and the layers (13, 14) of the material located therebetween are shortened. Method according to one of claims 1 to 9, characterized in that in each case a separate sealing element (20) is applied to the individual upper ends of the shortened layers (13, 14). Method according to one of claims 1 to 10, characterized in that between the outer layers (10, 11) of the hose piece (17) above the sealing elements (20) a re-closure member (21) is inserted and then connected to the inside of it materially. Method according to one of Claims 1 to 11, characterized in that, after the return of the outer layers (10, 11), the open side regions of the superimposed layers (3) are bonded to one another in the region of the tube openings and then the outer layers (10, 11) at least one of the tube openings (24) in the edge region are materially connected to one another. Method according to one of claims 1 to 12, characterized in that protruding material in the bottom region (19) is folded over and glued to one of the outer layers. Packing means of flexible material, in particular gusseted plastic bags, having a front wall and a rear wall, between which side folds extending over portions of their side regions are arranged, which are shortened in the upper region of the packaging means, so that the packaging means a side fold free head area between the front and rear wall, in particular produced by a method according to one of claims 1 to 13,
characterized,
in that each upper end of the side folds (28, 29) is closed by a separate sealing element (32) which fixes the respective side fold end to exactly one of the packaging means walls (25, 26). Packaging according to claim 14, characterized in that each sealing element (32) with a respective associated gusset (28, 29) and a respective packaging means wall (25, 26) is integrally connected. Packaging according to one of claims 14 and 15, characterized in that at least one free end of each sealing element between and at the same time spaced from the seam edges of at least the front and rear walls in the side region interconnecting side seam ends. Packaging according to one of claims 14 to 16, characterized in that each sealing element (32) is a strip of material. Packaging according to one of claims 14 to 17, characterized in that in the head region (30) above the sealing elements (32) a re-closure member (34) is arranged. Packaging according to claim 18, characterized in that the free ends of the re-closure member (34) each end in the side seams and at the same time spaced from the outer edges of the side seams. Packaging according to one of claims 18 and 19, characterized in that the re-closure member (34) is formed from mutually corresponding interlocking elements. Packaging according to claim 20, characterized in that the individual positive locking elements are associated with a respective packaging wall . Packaging according to one of claims 14 to 21, characterized in that each gusset (28, 29) in the head region (30) and in a bottom region (31) is formed shortened. Packaging according to one of claims 14 to 22, characterized in that the front wall (25) and the rear wall (26) in the bottom region (31) are connected to one another in a materially cohesive manner. Packaging according to one of claims 22 and 23, characterized in that the bottom region (31) has two mutually parallel cohesive connecting lines. Packaging means according to one of claims 22 to 24, characterized in that the bottom region (31) has at least one diagonally extending connecting line which connects regions of a respective lateral fold (28, 29) to a respective associated packaging means wall (25, 26).

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