EP3023350B1 - Front slider bag with stamp handle and blank for its formation - Google Patents

Description

The invention relates to a foil bag according to the preamble of claim 1.

The invention further provides a flattened unfilled foil bag blank, from which the aforementioned foil bag can be formed.

For the packaging of bulk goods, different designs of film bags with gussets are known from practice, such gusseted bags can also be distinguished with regard to their manufacturing process. Thus, gusseted bags can be made in succession by folding and heat sealing from a continuous material web, so that then the production direction of the bag corresponds to the course of the gussets and thus a bag longitudinal direction. Such a manufacturing process is also referred to as a "longitudinal process". Since only one material web for the front walls and the side gussets is supplied and formed by suitable folding devices to form a gusseted tube, results in a relatively simple process control. However, the arrangement of functional elements such as reclosures, handles or the like is complicated and limited by the manufacturing method to certain embodiments.

Alternatively, it is known to supply film webs separately for forming the opposite front walls and film strips folded over to form the gussets, so that then further devices such as reclosing strips can be easily inserted when connecting the various sections. Such a manufacturing process is also called a cross-process designated. A generic film bag, which is produced in a transverse process, is in the DE 103 40 099 A1 described.

In film bags with a comparatively large volume and / or a large filling weight, the formation of a carrying handle is advantageous in order to be able to handle the foil bag easily. According to the EP 2 148 820 B1 It is proposed to arrange a carrying handle opposite the reclosure on the other side fold in a film bag with gussets and a reclosure on one of the gussets. The film bag described is characterized in that with the handle and the opposite reclosure, the contents, such as pelleted pet food, cat litter, powdery or granular construction products, pourable food or the like can be easily distributed in subsets, with a certain portioning is possible. However, there is the disadvantage that the attachment of the carrying handle is associated with an increased manufacturing effort, which usually also an additional film strip or a prefabricated handle assembly are supplied. For certain applications, there is also the disadvantage that the removal opening formed by the reclosure is not large enough to easily engage with the hand or with a scoop in the foil bag can.

A foil bag with the features described above is made EP 2 284 091 B1 known. To provide a large discharge opening and to allow comfortable handling, a reclosure with mutually latching Wiederverschlussstreifen is provided in a film bag with two front walls and interposed gussets on a head portion, the reclosure strips each have a terminal lug and a locking bar and wherein the locking bar of a Sliders are overlapped for connecting and disconnecting. It results in the function of the manner of a zipper, the slider is called due to its arrangement as a rider.

According to the EP 2 284 091 B1 There is the advantage that the reclosure strips are arranged with the slider at a distance from an upper edge of the bag, wherein the reclosure is disposed protected against first opening within the film bag between the two front walls, so that damage or inadvertent operation of the reclosure before can be avoided by a user for the first time. The user also recognizes that the bag has not yet been opened without authorization prior to first use, so that the construction described also has the function of a closure seal.

The gussets are shortened at the height of the reclosure and are also covered and closed by one of the terminal lugs. At the edges of the terminal lug, however, a step is created by the thickness of the terminal lug, so that in a heat sealing a careful process control is necessary to achieve a reliable seal. In the head section above the reclosure, the two front walls abut each other over the entire width of the film bag, where a carrying handle is punched between two transverse sealing seams. This results in the advantage that no separate film strips or prefabricated handle constructions must be supplied for the design of the carrying handle.

When opened for the first time only one of the two front walls to expose the first hidden reclosure is torn so that the opposite side wall still extends beyond the reclosure addition, whereby the bag even after tearing still on the Carrying handle can be raised. The remaining on the foil bag after a first opening head section must not be disposed of separately. The disadvantage, however, is that the carrying capacity is considerably reduced, because when lifting on the carrying handle after a first opening the entire weight must be kept only by a front wall, so that it must be made correspondingly thick and stable.

From the US 7 210 848 B2 a film bag with gussets and a reclosure is known in which the reclosure on the inside of a front wall fixed stationary profile strips and a lockable profile strip has. Although a relatively tight and firm connection can be achieved with such a reclosure, very high pushing forces, which can be increased even further by contamination, result during a movement through the frictional contact over the entire length of the reclosure. The re-closure must be mounted so that on the one hand a arranged on the associated front wall removal opening is formed and on the other hand, the movable profile strip can be pulled out laterally.

From the US 8,387,793 B2 is a well-stackable bag known, which has approximately a cuboid shape. The removal of filling material takes place at an upper edge of the foil bag, for which purpose it can have a reclosure there. Above a filling space for the recorded product, a comparatively large head section is folded flat with the removal opening, so that disproportionately much film material has to be provided in relation to the provided filling space, which is why the material costs of the film bag are increased. Furthermore, a carrying handle is provided, which must be applied as a separate strip on the bag body. Gusseted bags with a carrying handle on the head section are also off DE 42 25 998 A1 . US 5 722 773 A and EP 2 113 470 B1 known, wherein a web of a bag film is folded at the upper edge and then gussets are formed, the two adjoining the front walls wings are not connected by a crease line, but a heat seal seam. The known foil pouches are usually formed from a comparatively thin foil and can be used for receiving light products such as baby diapers or rolls of tissue paper.

Also from the CH 675 235 A5 is a bag with handle and reclosure known.

The present invention has for its object to provide a film bag with gussets and a reclosure, which has improved functional properties at low material costs.

The object of the invention and solution of the problem are a film bag according to claim 1 and a flattened, unfilled foil bag blank according to claim 6.

According to the present invention, the production is carried out by a longitudinal process, wherein initially flattened, unfilled foil bag blanks are prepared, which are then to be filled later.

According to the invention, it is provided that the front walls on the one hand and the side folds on the other hand extend together from the bottom of the bag to an upper edge of the bag along the entire length of the bag longitudinal edge and that the reclosure with two terminal lugs of the reclosure strip attached to the first front wall and accessible through a window formed in the first front wall removal area.

According to the invention, the reclosure on the inside of the film bag is arranged on the first front wall, the side folds continuing behind the reclosure up to an upper edge of the bag. A costly shortening of the gussets in the production of the foil bag is not necessary, the foil bag can be lifted and worn even after a first-time opening without any impairment to the carrying handle. The force to be carried thereby is distributed not only on the second front wall, but also on the gussets, wherein according to the invention the removal area on the first front wall is window-shaped and thus ends at a distance to the bag longitudinal edges, so that even the first front wall in the bag longitudinal edges is consistent. If the foil bag according to a preferred embodiment of the invention with longitudinal sealing seams at the bag longitudinal edges, they can be pulled through on both front walls over the entire length of the front walls or gussets, so as to give a high stability and a pleasing appearance of the film bag.

According to the invention, the reclosing ends at a small distance from the bag longitudinal edges, wherein the distance may be, for example, between 10 mm and 45 mm, in particular between 15 mm and 35 mm. The distance is expediently chosen so that no reefing results from the re-closure at the bag longitudinal edges, even if longitudinal sealing seams are provided there. On the other hand, with the usual dimensions of the film bag, the reclosure extends over the greater part of the width of the first front wall, so that a large removal opening is formed.

By the slide a particularly simple and comfortable handling is possible.

The removal region can be formed by punching out a section of the first front wall, so that then the reclosure with the slider over its entire length is directly freely accessible. Alternatively, it is also possible that the front wall must first be torn open before first opening. For this purpose, a weakening line can be provided for the formation of the removal region. Preferably, a strip of the front wall over the reclosure is provided with a perforation, so that this strip can then be demolished when opened for the first time. Thus, the function of reclosing a user is displayed directly and the slider is held securely to its original position, a punch in the first front wall may be provided in an initial position for the slide side of the tearable strip.

In order to ensure a tight closure of the film bag prior to initial opening even with a separation or perforation of the first front wall, the terminal lugs of the reclosure strips may initially be tightly interconnected, in which case the terminal lugs are to be separated from each other for the first time.

According to the invention, a comparatively simply manufactured bag is provided, which, however, is distinguished by particularly good production and service properties. As explained above, the gussets do not have to be shortened during manufacture, the carrying handle being formed by a simple stamping or a different type of material separation in the front walls.

The reclosure fastened to the first front wall with both connection lugs is particularly easy to operate, with a conventional arrangement of the reclosure directly below a head portion, the first front wall at a full filling obliquely or even almost straight, so that then arranged on the first front wall Reclosure points after a first opening exactly in the direction of the contents, so that then the contents can be easily exhausted by the comparatively large removal opening. For example, pelleted animal feed can be easily taken with a measuring cup to allow optimal, individual feeding of a pet.

As explained above, the film bag is produced in a longitudinal process, wherein on a bag bottom, ie on the underside of the film bag, a bottom seam between the front walls inserted wings of the side folds with one of the front walls and between the side folds the two front walls directly to each other combines. When setting up the foil bag, the bottom seam lays laterally, wherein the bottom seam can be folded together with an adjacent portion of the front walls and gussets to improve the stability. In all cases, however, remains a certain asymmetry on the underside of the foil bag, so that this tends to tilt in the direction of one of the two front walls. In order to achieve an improved stability despite an overall efficient use of the film material used for the front walls and the side folds, the invention provides that the ratio of the stand height measured in the bag longitudinal direction to the depth determined by the side folds is less than 3: 1, in particular less than 2.5: 1 is. According to the invention, a relatively broad and in the direction of the tensioned side folds deep foil bag is thus provided with a low standing height. The result is the structure, which corresponds to the shape of a low Carrying bag reminds. The ratio of the width measured between the gussets on the front panels to the stand height is between 1.5: 1 and 1: 1.5.

In the dimensions described results in a similar comfort as in a conventional gusseted bag, which is provided at one of the gussets with a carrying handle, but with no separate carrying handle must be supplied and the carrying handle is formed in the head portion by a simple cut. The foil pouch with a comparatively low standing height can be stably carried and, due to the small height, can easily be lifted over obstacles, for example the loading edge of a trunk or in a cupboard.

In the context of the invention, it is accepted that based on the filling volume of the film bag in the production in a longitudinal process, a relatively wide film web is fed to achieve compared to the standing height, the relatively large width of the front walls and depth of the gussets , It should be noted that in the longitudinal process, a tube is formed with the two front walls and the gussets inserted therebetween, wherein the circumference of the tube with the double width of the front walls and the double depth of the side gusset corresponds to the width of the originally fed material web. Thus, while in a known from the prior art gusseted bag with a handle on the gusset an "elongated" film bag is provided, which is worn for stability reasons on a long side, according to the invention deliberately increased to a certain extent manufacturing effort is accepted.

Nevertheless, in the film bag according to the invention effective utilization of the film material used for the front walls and the side folds takes place. Accordingly, the unusable in a filled foil bag area above the filling space is kept as short as possible. Accordingly, the ratio is a length of the head portion along the bag longitudinal direction to the height of the filling space less than 1: 3. A shortest possible length of the head portion is also for practical reasons of advantage. Since the head portion is provided with the carrying handle, this stands upwards so that the foil bag can be easily lifted by a user on the carrying handle. The head section is therefore a dead space with respect to the storage of the film bag, which is why the head section is to be kept as small as possible. If the head section is folded for transport purposes, it still has to be easy for a user to grasp and erect. A long head section would also be detrimental to comfort, as it would result in a longer lever arm and greater overall height. The height of the head section, including the connecting seam separating the head section from the filling space, is typically between 45 mm and 100 mm, in particular between 55 mm and 80 mm, up to an upper edge of the bag.

As previously explained, the front panels and side gussets of the invention are formed by folding and heat sealing from a portion of a bag film. The bag film is multilayered, the bag film having on a bag inside a heat-sealable layer based on polyolefin and on a bag outside of an outer layer.

The sealing layer is expediently heat-sealable in order to close the film bag on the circumferential side, to be able to form longitudinal and transverse sealing seams and also to be able to fasten further devices such as the resealing by heat sealing. As a heat-sealable material come alongside Polyolefins such as polyethylene (PE) and polypropylene (PP) and polyolefin copolymers also include various biodegradable plastics such as polylactic acid (PLA), polybutylene adipate terephthalate (PBAT) and polybutylene succinate (PBS).

The outer layer is less heat sealable compared to the sealing layer, for which the outer layer may have a higher melting or softening temperature. In the case of a heat-sealing of the bag film, it is then achieved that, although the sealing layer is melted through the outer layer, if appropriate, without the outer layer being excessively deformed or losing its structure. The outer layer may in particular be formed from polyester, in particular polyethylene terephthalate (PET), such an outer layer usually being oriented. Other suitable materials for the outer layer are, for example, polyamide, polypropylene or polylactic acid, wherein these materials also preferably have an orientation caused by a stretching, which leads to a reduction in the tendency to fusion in a heat-sealed.

The multilayer bag film is preferably laminated by adhesive. In addition to the sealing layer and the outer layer, it is also possible to provide further layers, for example to increase the barrier effect. As a barrier may be provided, for example, a film layer of ethylene-vinyl alcohol copolymer (EVOH), a thin metal foil or a metallized film layer.

The thickness of the front walls and the side folds is usually between 60 .mu.m and 200 .mu.m, preferably between 70 .mu.m and 170 .mu.m, which corresponds to the thickness of the bag film when the film bag is produced by folding and heat sealing. For example, a bag film can be provided which has an outer layer of PET, a metallized intermediate layer of PET and a sealing layer of PE. The thickness of the two PET layers may, for example, be 12 .mu.m and the thickness of the sealing layer 140 .mu.m. As part of the described embodiment, all three layers can be formed as a single film and connected by a laminating adhesive. This is particularly advantageous if between the two PET layers - as explained below - an imprint should be generated. On the basis of the outer layer, it is not possible, on the basis of the outer layer, for an imprint located even further on the inside of the transition to the sealing layer.

The filling space preferably has a volume of between 4 l and 20 l, in which case the filling weight depends on the density of the filling material. For example, for pelleted pet food, the fill weight can be between 2.5 kg and 10 kg. As described above, the foil bag according to a preferred embodiment of the invention, based on the depth determined by the gussets compared to known, generic foil bags with a handle on a head portion on a comparatively low height, which is also accepted that in the production In a longitudinal process, a relatively wide film web is supplied. The foil pouch is thus suitable, for example when used for animal feed, for a medium pouch size and an average filling weight.

The reclosure is attached to the first front wall and also spaced from the bag longitudinal edges. Against this background, it is provided according to the invention that the reclosure is fastened to the first front wall by a heat-sealed seam which is closed in a frame-shaped manner and spaced apart from the longitudinal edges of the bag. The frame-shaped closed heat seal seam ensures reliable sealing of the reclosure as well to the sides, where then the reclosure on the first front wall is a functionally and spatially delimited unit.

Preferably, the terminal lug of the one re-closure strip below the removal area and the connection lug of the other re-closure strip are fastened directly or via a separate foil section above the removal area. Regardless of the preferred embodiment of a frame-shaped closed heat-sealing seam, it can also be provided that the connection lug or the foil section extends above the removal region to the connecting seam which separates the head section from the filling space. In order to ensure optimum utilization of the filling space, the reclosure is arranged as far up as possible, whereby a particularly good handling when removing the filling material is achieved. If the connecting lug or the foil section extends above the removal region up to the connecting seam, the lug or the foil section there can also be sealed into the connecting seam, resulting in an additional, particularly reliable fixation.

According to the invention, the front walls on the one hand and the side folds on the other hand extend together from the bottom of the bag to an upper edge of the bag along the entire bag longitudinal edges. But in order to avoid sharp edges on the upper edge of the bag and to achieve an attractive appearance of the film bag, bag corners are separated at the head area at the level of the carrying handle. For example, the bag corners may be separated along an oblique line, or preferably along an S-shape.

So that the gussets do not open up at the head area, the wings are connected to each other there. There according to a preferred embodiment of the invention a multilayer bag film is used with a non-heat-sealable or poorly heat-sealable outer layer, a connection of the wings can not be done without further measures by a heat seal. Nevertheless, to connect the wings together, a simple glue point can be provided. Alternatively, at the points to be joined in the wings also openings or punched holes are formed, in which case the two front walls are connected by the punched holes in a heat-sealing together, whereby the respective side gusset is fixed accordingly.

In principle, it is possible to seal the entire head section flat, so that then the head section is formed by a single wide, straight sealed seam. According to the invention, however, it is provided that the head portion has the filling seam delimiting seam as part of a frame-shaped seal, in which case the material separation is arranged to form the carrying handle within this frame-shaped seal.

The invention also relates to a flattened, unfilled bag blank, from which in particular the previously described filled and closed foil bag can be formed.

The flattened, unfilled foil pouch blank has a first front wall, a second front wall, two side folds, a reclosure, a tube section formed by the front walls and the side folds for receiving a filling material, a head section separated from the tube section by a connecting seam and one at the head section a transection of the front walls formed handle. The side gussets each have two wings adjoining one another by a crease line running in the longitudinal direction of the bag. The gussets are thus each off formed a continuous, continuous film section, which is provided centrally with the bending line. The wings connect at Beutellängskanten each to one of the front walls, the reclosure with each other latching Wiederverschlussstreifen with terminal lugs and locking strips on which a slider for connecting and disconnecting the locking strips is arranged and wherein the reclosure is attached via the terminal lugs on an inner side of the hose section ,

According to the invention, a lower edge of the bag opposite the head section is unlocked in the unfilled foil bag blank, wherein a filling opening is formed between the front walls and the side folds at the lower edge of the bag. The front walls, on the one hand, and the gussets, on the other hand, extend together from the lower edge of the bag to an upper edge of the bag along the entire length of the bag. The reclosure is attached to both terminal lugs of the reclosure strip on the first front wall and accessible through a window in the first front wall removal area that does not extend to the bag longitudinal edges, accessible.

Preferably, the ratio of the width of the gusset wings inserted between the front walls to the length determined in the bag longitudinal direction between the upper edge and the lower edge is between 1: 5 and 1: 8. With regard to the filled film bag described above, it should be noted that the width an inserted wing only half the width of a gusset formed by two wings corresponds. The length of the flattened, unfilled foil bag blank is greater than the standing height of the foil bag, because the foil bag blank by filling and closing of the material of the front walls and the side folds forms a bottom and on the upper edge of the filling space is set up, which significantly reduces the height of the stand.

Also described below is a method for producing a film bag having a first front wall, a second front wall, two gussets and a reclosure, wherein a web of a bag film is guided with a sealing layer and an outer layer in a production direction, at a uniform distance through at least one Line of weakness and / or the separation of a portion of the bag film removal areas are formed, the width of which is smaller than the width of the front walls, and reclosures are placed on the removal areas and attached to the sealing layer of the bag film, wherein subsequently a gusseted tube with continuous gussets is formed in that the removal areas are each provided with a reclosure on the first front wall on an inner side of the bag, lateral ends of the reclosure being covered by the side folds, adjacent to the Wi ederverschlüssen to form a head portion each head seals are produced with at least one transverse seam, which wings of the gussets with the front walls and between the gussets connect the front walls together, wherein within the top seal by the generation of dividing lines in the front walls a carrying handle is formed, from the side gusset tube is separated by a separation adjacent to the head seal tube sections, one longitudinal end of which is formed by the head seal and the other longitudinal end is open with the inserted between the front side gussets, wherein subsequently spread the open longitudinal end and the tube section is filled with a filling material, before the open longitudinal end is closed with a bottom seam.

It is formed within the head seal by the creation of dividing lines in the front walls a carrying handle. In the simplest case, a dividing line to be included by a user is cut into the two front walls or punched through the two front walls. The dividing lines on the front walls then form a slot that can be intervened by a user. To form a comfortable grip shape, the dividing lines can be C-shaped. Furthermore, it is also possible that a handle punching is formed to form the handle on the dividing lines, so that then the handle is visible immediately as an opening in the front walls. In principle, it is also possible that along the dividing line, the two front walls are initially not completely cut. Thus, for example, the dividing lines can also be formed as a type of perforation, with the user then tearing the perforation during the insertion of a hand.

As part of the manufacturing process can be provided that in the head area at the level of the handle bag corners are separated. A removal of the bag corners can in particular take place when individual tube sections are separated from the gusseted tube. Preferably, the head seal is formed so that it surrounds the carrying handle frame-shaped with circumferential sealing seams.

Fig. 1

einen erfindungsgemäßen Folienbeutel,

Fig. 2

einen Schnitt entlang der Linie A-A der Fig. 1,

Fig. 3

ein flachgelegter, unbefüllter Folienbeutelrohling als Vorprodukt des Folienbeutels gemäß Fig. 1,

Fig. 4

ein Verfahren zur Herstellung eines Beutelrohlings gemäß der Fig. 3,

Fig. 5a und 5b

das Befüllen und Verschließen des Beutelrohlings gemäß der Fig. 3 zur Bildung des Folienbeutels gemäß der Fig. 1.

The invention will be explained in the following with reference to a drawing showing only one exemplary embodiment. Show it:

Fig. 1

a foil bag according to the invention,

Fig. 2

a section along the line AA the Fig. 1 .

Fig. 3

a flattened, unfilled foil bag blank as a precursor of the foil bag according to Fig. 1 .

Fig. 4

a method for producing a bag blank according to the Fig. 3 .

Fig. 5a and 5b

the filling and closing of the bag blank according to the Fig. 3 for forming the film bag according to Fig. 1 ,

The Fig. 1 shows a foil bag having a first front wall 1a, a second front wall 1b, two side folds 2 and a reclosure 3. In a filling space 4 formed by the front walls 1a, 1b and the lateral folds 2, a pourable product, for example pelleted pet food, is arranged. The filling chamber 4 is closed by a connecting seam 5 upwards and separated from a head portion 6, wherein the connecting seam 5 is associated with the head portion 6. At the head portion 6, a carrying handle 7 is formed by a transection of the front walls 1a, 1b, wherein the severing can be generated in a simple manner by punching.

The two lateral folds 2 each have two wings adjoining each other by a bending line 8 running in the longitudinal direction of the bag 1, which adjoin one of the front walls 1a, 1b at longitudinal bag edges 9. Longitudinal sealing seams 10 are formed at the bag longitudinal edges 9, which stabilize the film bag, wherein the two front walls 1a, 1b, as described below (FIG. Fig. 4 ) are formed by folding and heat sealing of a bag film, wherein in one of the longitudinal sealing seams 10 and the edges of the bag film are connected.

From the Fig. 1 It can already be seen that the reclosure 3 is accessible through a window-shaped removal area 11 formed in the first front wall 1a. The removal area 11 has before a first opening on a punched, in which a slider 12 of the reclosure 3 is arranged. Adjacent to the slide 12, the removal area 11, prior to initial opening, has a strip 13 of the first front wall 1a which can be torn out of the first front wall 1a along a line of weakness.

The removal region 11 ends at a distance from the bag longitudinal edges 9 and the longitudinal sealing seams 10 formed there.

At a bottom of the bag, so at the bottom of the film bag, a bottom seam 14 is provided, which the inserted between the front walls 1a, 1b wings of the gussets 2 with one of the front walls 1a, 1b and between the gussets 2, the two front walls 1a, 1b directly connects with each other.

The further details of the foil bag emerge from the Fig. 2 which make a section along the line AA of Fig. 1 shows as well as from the Fig. 3 , which shows a flattened, unfilled foil bag blank from which the in Fig. 1 represented foil bag is formed by filling and closing.

From the Fig. 2 In particular, the details of the reclosure 3 can be seen. The reclosure 3 comprises mutually latching reclosing strips 15, each having a connecting lug 16 and a locking strip 17 adjoining the connecting lug 16. The terminal lug 16 and the locking bar 17 can be extruded together as a strand. The locking bar 17 is of the in Fig. 1 slider 12 overlapped shown, which brings together the locking strips 17 in the manner of a zipper during movement in a first direction and pulls apart in a movement in an opposite direction. According to the illustrated embodiment, the terminal lugs 16 are connected to each other before their first opening at their ends to ensure a tamper-evident closure. One of the connection lugs 16 is fastened below the removal region 11 on the inside of the bag to the first front wall 1a by a heat-sealing seam, while the other connection lug 16 is sealed over an additional foil section 18 above the removal region 11 on the inside of the first front wall 1a.

According to a preferred embodiment, the reclosure 3 is supplied as a prefabricated unit in the production and sealed, including according to the Fig. 3 a circumferential, closed frame-shaped sealing seam 22 can be produced.

From the Fig. 3 It can be seen that the front walls 1a, 1b and the side folds 2 extend together from the bag bottom to an upper edge of the bag along the entire bag longitudinal edges 9. Furthermore, it can be seen that a head seal 24 is formed with the connecting seam 5 frame-shaped, wherein the punched handle 7 is disposed within this frame-shaped head seal 24.

According to the Fig. 1 has the film bag compared to the determined by the gussets 2 depth t a relatively low standing height h, wherein the ratio of measured in bag longitudinal direction l standing height h to determined by the gussets 2 depth t smaller than 3: 1, in particular smaller than 2.5: 1 is. The ratio of the width b measured between the gussets 2 on the front walls 1a, 1b to the standing height h is between 1.5: 1 and 1: 1.5.

In the Fig. 3 is indicated that the wings of the gussets 2 are connected by fixing points 19, to avoid there a gaping of the gussets 2. According to an embodiment explained further below, openings 20 can also be formed in the wings of the side folds 2 ( Fig. 4 ), through which the two front walls 1a, 1b are directly connected to each other, so that a fixation of the gussets 2 takes place.

The filling volume of the film bag is usually between 4 l and 20 l. For example, in the exemplary embodiment, the depth t between 100 mm and 200 mm, for example 150 mm, the width b between 250 mm and 450 mm, for example, 350 mm and the standing height h between 250 mm and 450 mm, for example 350 mm, wherein the Stand height h results from the height of the filling space 4 and the height of the head section 6 arranged above.

The front walls 1a, 1b and the side folds 2 are usually provided with a print. The print can be arranged completely inside lying as a counter pressure in a laminated bag film. However, the embodiment shows an alternative embodiment in which a print is applied from the outside to the outer layer of the bag film. In the embodiment, first printing portions 21a are dull while second printing portions 21b are glossy. This is achieved by arranging the second printing sections on an outer layer of PET inside, that is to say at the transition to an adjacent film layer, while the first printed sections 21a with a matt printing ink face on the opposite, exposed ones Side of the outer layer can be applied. In the embodiment, a core layer of PET is metallized. Without an application of paint or with only a thin or transparent application of paint and a clear design of the outer layer and the core layer then the metallization remains visible, so that even shiny metallic areas can be formed. By combining the different areas, it is thus possible to produce dull sections, shiny sections and shiny metallic sections.

For example, the following structure is conceivable from the outside:
Matt color / PET (12 μm) / printing ink / laminating adhesive / metallization / PET (12 μm) / laminating adhesive / PET (140 μm)

The matt color and the printing ink are usually not provided in mutual coverage, but in different areas.

In the context of the invention, the carrying handle 7 usually extends between the gussets 2, in which case the gussets 2 are not integrated into the carrying handle 7. Furthermore, it is preferred that the reclosure 3 as well as the removal region 11 arranged in front of it have a distance from the longitudinal bag edges 9, but nevertheless superimpose the side gussets 2 running underneath at their edges.

The preferred features described are exemplified in the exemplary embodiment.

According to the invention it is provided that the flattened unfilled foil bag blank according to the Fig. 3 already fully formed on his head and is closed, in which case filling takes place at the lower edge of the bag before the bottom seam 14 is then formed to close the film bag.

The Fig. 4 shows a preferred method to the in Fig. 3 To form the foil bag blank shown.

In this case, a material web of a bag film is guided with a sealing layer and an outer layer in a production direction P, wherein the sealing layer in the Fig. 4 is above. For orientation, the areas on which the two side gussets 2 and the two front walls 1a, 1b are subsequently formed are also indicated on the material web, even if the material web is initially completely flat.

Then, the removal areas 11 are formed at a uniform distance, for which purpose an area is stamped out for the slides 12 of the reclosures 3 and an adjacent strip 13 is perforated. Moreover, where subsequently the gussets 2 are formed, openings 20 are punched out, with which subsequently the gussets 2 are fixed to the head portion 6 by directly connecting the two front walls 1a, 1b through the openings 20.

Then the reclosure 3 described above is placed on the sealing layer of the bag film and secured by a frame-shaped sealing seam 22, whereupon the bag film is converted by folding knife to a gusseted tube 23, on which the longitudinal sealing seams 10 are generated, the edges of the gusseted to the side 23 folded bag film on one of the longitudinal sealing seams 10 are connected to each other.

In a further step, a head seal 24 is formed in the shape of a frame, wherein the head seal 24 comprises the connecting seam 5, which the in Fig. 1 and 2 shown filling space 4 separates from the head portion 6. In a further step, carrying handle 7 are then formed inside the head seal 24, wherein simultaneously or subsequently bag corners 25 are removed at the level of the carrying handle 7 and individual foil bag blanks are separated from the side fold tube 23.

The Fig. 5a and 5b show that the film bag blank thus formed spreads at its lower edge, filled and then closed by the bottom seam 14. In particular, the flattened, unfilled foil pouch blank can be produced as a prefabricated packaging (pre-made bag), transported and filled and closed at another location.

Claims (7)

1. A film bag comprising a first front wall (1a), a second front wall (1b), two side folds (2), a reclosure (3), a filling space (4) formed by the front walls (1a, 1b) and side folds (2), a head section (6) separated from the filling space (4) by means of a connecting seam (5), a carrying handle (7) formed on the head section (6) through a transection of the front walls (1a, 1b), wherein the side folds (2) each have two wings, which adjoin one another by means of a fold line (8) running in the longitudinal bag direction (l) and which in each case adjoin one of the front walls (1a, 1b) on longitudinal bag edges (9), wherein the reclosure (3) has reclosure strips (15), which snap together, comprising connecting lugs (16) and catch strips (17), on which a slider (12) for connecting and separating the catch strips (17) is arranged, wherein the reclosure (3) is fastened to an inner side of the filling space (4) via the connecting lugs (16) and wherein a bottom seam (14) on a bag bottom connects the wings of the side folds (2) inserted between the front walls (1a, 1b) to one of the front walls (1a, 1b) each, and connects the two front walls (1a, 1b) between the side folds (2), wherein the front walls (1a, 1b) on the one side and the side folds (2) on the other side jointly extend from the bag bottom to an upper bag border along the entire longitudinal bag edges (9), wherein the reclosure (3) is fastened to the first front wall (1a) by means of both connecting lugs (16) of the reclosure strips (15) and is accessible through a removal area (11) formed in a window-shaped manner in the first front wall (1a), wherein the reclosure is arranged directly below the head section and the first front wall runs obliquely in the case of a full filling space, wherein the wings of the side folds are connected to one another on the head section, characterized in that the reclosure ends at a distance between 10 mm and 45 mm to the longitudinal bag edges, wherein the ratio of the height (h) to the depth (t) determined by the side folds (2) is less than 3:1, in particular less than 2.5:1, wherein the ratio of the width measured between the side folds (2) on the front walls (1a, 1b) to the height (h) measured in the longitudinal bag direction (l) is between 1.5:1 and 1:1.5, wherein the front walls (1a, 1b) and the side folds (2) are formed by means of folding and heat-sealing from a section of a multi-layer bag film, wherein, on an inner bag side, the bag film has a heat-sealable sealing layer on the basis of polyolefin and, on an outer bag side, has an outer layer, wherein the reclosure (3) is fastened to the first front wall (1a) by means of a heat-sealed seam (22), which is closed in a frame-shaped manner and is spaced apart from the longitudinal bag edges (9), wherein bag corners are separated on the head section (6) at the height of the carrying handle (7), and wherein the head section (6) has the connecting seam (5), which delimits the filling space (4), as part of a frame-shaped sealing, and the material separation for forming the carrying handle (7) is arranged inside this frame-shaped sealing.
2. The film bag according to claim 1, characterized in that the ratio of a length of the head section (6), which is determined along the longitudinal bag direction (l), to the height of the filling space (4) is less than 1:3.
3. The film bag according to claim 1 or 2, characterized in that the front walls (1a, 1b) and the side folds (2) have a thickness of between 60 µm and 200 µm.
4. The film bag according to one of claims 1 to 3, characterized in that the connecting lug (16) of the one reclosure strip (15) is fastened below the removal area (11), and the connecting lug (16) of the other reclosure strip (15) is fastened directly or via a separate film section (18) above the removal area (11), wherein the connecting lug (16) or the film section (18), respectively, above the removal area (11) extends all the way to the connecting seam (5).
5. The film bag according to one of claims 1 to 4, characterized in that the filling space (4) has a volume of between 4 l and 20 l.
6. A laid-flat, unfilled film bag blank, for forming a film bag according to one of claims 1 to 5, comprising a first front wall (1a), a second front wall (1b), two side folds (2), a reclosure (3), a tube section formed by the front walls (1a, 1b) and the side folds (2), for receiving a filling material, a head section (6) separated from the tube section by means of a connecting seam (5), a carrying handle (7) formed on the head section (6) through a transection of the front walls (1a, 1b), wherein the side folds (2) each have two wings, which adjoin one another by means of a fold line (8) running in the longitudinal bag direction (l) and which in each case adjoin one of the front walls (1a, 1b) on longitudinal bag edges (9), wherein the reclosure (3) has reclosure strips (15), which snap together, comprising connecting lugs (16) and catch strips (17), on which a slider (12) for connecting and separating the catch strips (17) is arranged, and wherein the reclosure (3) is fastened to an inner side of the tube section via the connecting lugs (16), wherein the front walls (1a, 1b) on the one side and the side folds (2) on the other side jointly extend from the lower bag border to an upper bag border along the entire longitudinal bag edges (9), wherein the wings of the side folds (2) are connected to one another on the head section (6), and the reclosure (3) is fastened to the first front wall (1a) by means of both connecting lugs (16) of the reclosure strips (15) and is accessible through a removal area (11) formed in a window-shaped manner in the first front wall (1a), characterized in that the front walls (1a, 1b) and the side folds (2) are formed by means of folding and heat-sealing from a section of a multi-layer bag film, wherein, on an inner bag side, the bag film has a heat-sealable sealing layer on the basis of polyolefin and, on an outer bag side, has an outer layer, that the reclosure (3) is fastened to the first front wall (1a) by means of a heat-sealed seam (22), which is closed in a frame-shaped manner and is spaced apart from the longitudinal bag edges (9), that bag corners are separated on the head section (6) at the height of the carrying handle (7), wherein the head section (6) has the connecting seam (5), which delimits the filling space (4), as part of a frame-shaped sealing, and the material separation for forming the carrying handle (7) is arranged inside this frame-shaped sealing, and that a lower bag border, which is located opposite the head section (6), is unsealed and forms a filling opening between the front walls (1a, 1b) and side folds (2).
7. The laid-flat, unfilled film bag blank according to claim 6, characterized in that the ratio of the width of the wings of the side folds (2) inserted between the front walls (1a, 1b) to the length, which is determined between the upper border and the lower border in the longitudinal bag direction (l), lies between 1:5 and 1:8.

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