EP2186743A1 - Film packaging bag - Google Patents

Abstract

The bag has a resealable closure (4) arranged in a head region and extending in a transverse direction. The closure includes connection lugs (7a, 7b) adjacent to profile strips (6a, 6b) e.g. spring elements, where the closure is connected with a bag film (3) at a bag inner side using the lugs. Lateral folds (2) form a chute in an expanded position during opening of the closure. The lateral folds are covered at upper ends by the profile strips during closing of the closure. The lugs directly lie at and connected with a front wall (1a) at an end (9) of the closure.

Description

The invention relates to a film packaging bag with two formed from a bag film opposite front walls, a gusset extending from a head portion of the film bag over at least a portion of a bag side and there connects the opposite front walls together and arranged in the head area, extending in the transverse direction Reclosure, which comprises a slider, two of the slider like a tabbed overlapping, interconnectable profile strip and subsequent terminal lugs with which the reclosure on the inside of the bag is connected to the bag film, with a limited by a first end of the reclosure movement of the slider along the profile strip in a first direction a connection and an opposite, limited by a second end of the reclosure movement in a second direction a separation of the profile Stre ifen causes, wherein the gusset forms an chute when opened reclosure in the unfolded state and wherein in a closed reclosure, the gusset is covered at its upper, the chute forming end of the above arranged, connected profile strips.

A film packaging bag with the features described is known from EP 1 442 992 A1 known. According to the known embodiment, the terminal lugs of the reclosure are attached to the inside of the bag by heat sealing. The reclosure can thus be secured by heat-sealing also readily bags which have on their outside a no or only difficult heat-sealable layer, for example of polyester. Furthermore, the optical appearance of the bag is not affected by the arrangement of the reclosure. The well-known foil packaging bag is as a side gusseted bag with two opposite, the Formed side walls connecting front walls, wherein the gussets each extend over the entire height of the film packaging bag. The reclosure extends over the entire width of the front walls and is thus arranged in the region of the two gussets. The reclosure projects with its interlockable profile strip beyond the upper edge of the bag film, so that the chute forming a side fold covered in the folded state and a closed reclosure of the interlocked profile strips, ie is closed.

While one of the terminal lugs extends completely along one of the front walls, the other terminal lug is fastened on the one hand to the opposite front wall and on the other hand to the unfoldable side fold. The existing between these areas transition forms a stage at which due to the superimposed layers of material and in particular due to the transition of two layers of material, that is, the two front walls on four layers of material, that is, the two front walls with the inserted gusset, the increased risk of Leakage exists. Furthermore, unevennesses in the front walls may arise at the transition, so that the appearance of the film packaging bag is impaired.

Against this background, the invention has for its object to provide a resealable foil packaging bag, which has a high-quality appearance and allows a secure tamper-evident closure before first opening.

Based on the features described above, the object is achieved in that bear against the second end of the reclosure, the terminal lugs directly on the front walls and connected to the front walls. Conveniently, the profile strips are arranged above the edge of the front walls, so that the slider, which is also referred to as a slider, can be moved freely, wherein the slider acts directly on the profile strips. According to the invention, one terminal lug is attached to one of the front walls and the other terminal lug to the other front wall at the second end of the reclosure. Along the connecting lugs so step-shaped transitions can be avoided, so that in addition to an improvement of the tightness and the visual appearance even with short connection lugs an easy operation of the slide can be ensured.

The profile strips can be designed as tongue and groove elements, wherein one of the strips is designed as a female element with undercuts and the other strip as a male element with a spring. Slider closures, ie reseals that have a slider, are characterized by a very simple handling and ensure a relatively secure and tight closure. While in a simple zipper closure the elements should be easily latched and separable by hand and thus the strength of the reclosure is limited, can be generated by the operation by means of the slider also very easy very strong locking. It is advantageous in particular that the slide can also cause a spreading or deformation of the tongue and groove elements in order to insert the spring in the groove.

According to a first embodiment of the invention, the film packaging bag in addition to the fold-out, forming a chute gusset no additional gusset on. The only gusset according to such an embodiment can be formed either together with the front walls by folding from the bag film or from a separate film section. According to a preferred embodiment, it is provided that the gusset is formed by a separate film section and extends only over an upper portion of the bag side. Thus, it is possible to provide a large chute in conventional, tubular film packaging bags to facilitate the removal of the contents. In the context of such an embodiment, the additionally used gusset does not serve to increase the filling volume, but only to facilitate handling. The film packaging bag may have a floor stand, with corresponding embodiments are also referred to as a stand-up pouch.

According to an alternative embodiment of the invention, it is provided that the film packaging bag is designed as a side-folding bag and opposite the gusset forming side gusset has a second, non-fold-out side gusset. Again, there is the possibility in the formation of the film packaging bag to insert the gussets as separate film sections between the front walls or preferably to form the gusseted bag with its front walls and gussets by folding from the bag film. In the training as gusseted bag, however, additional measures are required to attach the terminal lugs directly to the front walls at the second end of the reclosure.

Thus, it can be provided that the non-fold-out side fold ends at a distance from the head area and is covered at its upper edge to ensure a tight seal. For this purpose, a separate sheet of foil is preferably provided, which closes the unfoldable side fold at its upper edge on the inside of the bag and connects to one of the front walls. In order to form such a film packaging bag, it may be provided in the manufacture of the bag film with a window-shaped cut-out, which the upper end of the later formed not hinged gusset limited. The separate sheet of foil is then placed on the bag film and welded with portions of the film web, which adjoin the window-shaped punching directly or with a small distance and at the laterally formed side fold respectively form the upper film layer of the side fold, the film sheet in the window-shaped punched protrudes into and is wider than the laterally formed gusset. Subsequently, the gussets are then formed in a folding station by folding the bag film. Finally, welding takes place, with the formed unfoldable side fold being closed by means of the film pile at its upper end. The arrangement of the reclosure is usually carried out before folding the material web, wherein the reclosure over a portion of the width of a front wall or due to the remote, non-fold-out gusset can extend over the entire width of the front walls.

Basically can be provided on the non-fold-out side gusset, which is preferably discontinued as described above, from the associated side edge obliquely upwardly extending seal, which is continued in the head region of the foil packaging bag on the front walls and along its course the front walls with the non-fold-out gusset or connects the front walls together. This oblique sealing seam preferably extends directly to the reclosure. By the described embodiment can be achieved that the present in the bag contents can not accumulate in the region of the offset side fold. In addition, the oblique sealing seam also serves to guide the contents to the fold-out gusset, so that a very simple handling and in particular an easy emptying of the foil packaging bag can be achieved. A corresponding obliquely extending longitudinal seam against the chute forming, fold out Gusset is basically also conceivable in a design which, as described above, has only a single gusset.

In an embodiment with an obliquely upward sealing seam, the reclosure extends only over part of the width of the front walls. In addition or as an alternative to the obliquely upward-running sealing seam, it can be provided that, in one embodiment as a side-folding bag, the head region above the non-fold-out side fold is removed. Furthermore, it is possible to provide a grip punching in the head region opposite the gusset forming side gusset. In one embodiment, as a gusseted bag it is not necessary to sell the non fold-out side gusset. Rather, the non-fold-out gusset preferably extends to the upper edge of the foil pouch, the Griffausstanzung is reinforced in the context of such an embodiment by the material of the gusset. In order to ensure sufficient tightness even in the area of the handle punching, the surrounding areas can be heat-sealed over the whole area.

The first end of the reclosure extends in the region of the chute forming, fold-out gusset preferably directly to this. For removal of filling this gusset is then pulled out, whereby the filling opening is increased. For re-closing the gusset forming gusset is then folded back between the front walls, the slider during the closing movement as it moves in the first direction over the area of the gusset and wherein the folded between the front walls gusset at its upper end of the closed Condition with each other latched profile strip is covered.

According to an alternative embodiment, it is provided that the reclosure extends beyond the front walls in the region of the first end and is arranged on the side fold forming a chute such that it is fixed by the reclosure in an unfolded state. According to such an embodiment, the side gusset forming a chute always remains unfolded, wherein the length of the reclosure can also be greater than the width of the front walls. Such an embodiment is particularly useful when you want to be removed from the foil packaging bag either very large or small quantities at once. When unloading small quantities, the chute, which is always folded out, allows accurate dosing. In contrast, rapid, complete emptying is easily possible with a completely opened reclosure, since virtually the entire head area, including the folded-out side fold, forms a removal opening.

By re-closure provided according to the invention, the contents are protected against falling out of the bag and also on a measure against environmental influences even after a first opening. Usually, however, an airtight tamper-evident closure is required prior to initial opening. This is also useful to clearly indicate the first opening to a user, so that any manipulation of the contents can be excluded. In order to achieve a tamper-evident closure, the terminal lugs can be separably connected to each other. If the gusset forming gusset according to the preferred embodiments described above is initially folded between the front walls, such a separable connection of the terminal lugs is possible only in the part of the reclosure adjoining this gusset. Additionally or alternatively, a tamper-evident closure can also be ensured in a particularly advantageous manner by a peelable, ie separable sealed seam or by adhesive. To help in the production of the foil packaging bag On the one hand, to produce permanent sealing seams and, on the other hand, peelable sealing seams, it is possible, for example, to provide a section-wise coating of the bag film, this coating counteracting a permanent sealing. Preferably, the terminal lugs inside and outside, at least in the region in which a seal is provided, formed of different materials, wherein on the front walls facing sides on the one hand a material is used, which causes a permanent, solid seal and wherein facing each other On the other hand, a material is used on the sides of the connection lugs, which material causes a separable peel seal against itself and against the bag foil.

Finally, as an alternative or in combination with the features described above, a foil section which at least partially covers the reclosure can be provided on the head region, which foil section can be removed for initial opening of the foil packaging bag and release of the slide. Such a configuration is characterized in that the slide is also protected against accidental operation. In addition, the entire reclosure is also protected against contamination or other impairments.

The bag film, from which the opposing front walls and preferably also the at least one side gusset are formed, can be formed in the context of the invention without limitation as a monofilm multilayer coextruded or multilayer laminated film. Particularly preferred is a Kaschierverbund with a heat-sealable inner layer and an outer layer which is not sealable or which has at least a higher sealing temperature than the inner layer. In the context of such an embodiment, the film packaging bag can be formed by folding and sealing, without the outer layer forming the outer surface in their structure or appearance is impaired. Suitable, for example, is a laminating composite with an inner layer of polyolefin, for example polyethylene, and an outer layer of polyester, for example polyethylene terephthalate, it being possible for an inner-side printing to be provided on the outer layer, which has been applied before the connection with the inner layer. Regardless of the specific embodiment of the inner and outer layers, intermediate layers may also be present in a multilayer film, which are provided for example to improve the barrier effect.

Fig. 1

einen Folienverpackungsbeutel in einer Draufsicht,

Fig. 2a

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

Fig. 2b

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

Fig. 2c

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

Fig.3

der Folienverpackungsbeutel gemäß der Fig. 1 mit einem geöffneten Wiederverschluss in einer perspektivischen Ansicht,

Fig. 4

eine alternative Ausgestaltung des Folienverpackungsbeutels in einer Ansicht entsprechend der Fig. 3,

Fig. 5 bis 7

weitere alternative Ausgestaltungen des Folienverpackungsbeutels in einer Draufsicht entsprechend der Fig. 1.

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

Fig. 1

a foil packaging bag in a plan view,

Fig. 2a

a section along the line AA the Fig. 1 .

Fig. 2b

a section along the line BB of Fig. 1 .

Fig. 2c

a section along the line CC the Fig. 1 .

Figure 3

the foil packaging bag according to the Fig. 1 with an open reclosure in a perspective view,

Fig. 4

an alternative embodiment of the film packaging bag in a view corresponding to Fig. 3 .

Fig. 5 to 7

Further alternative embodiments of the film packaging bag in a plan view according to the Fig. 1 ,

Fig. 1 shows a film packaging bag according to the invention, which is designed as a gusseted bag with two opposite front walls 1a, 1b and two side folds 2, 2 'connecting the front walls 1a, 1b. The film packaging bag can be formed without restriction from individual sections or preferably by folding and sealing from a bag film 3.

In the head region of the film packaging bag, a reclosure 4 is arranged, which extends substantially over the entire width of the front walls 1a, 1b. The reclosure 4 comprises a slider 5, two profiled strips 6a, 6b overlapped in a rider-like manner by the slider 5, and subsequent connecting lugs 7a, 7b, with which the reclosure 4 on the inner side of the bag is connected to the bag film 3. Fig. 1 shows the reclosure 4 in the closed state, wherein the slider 5 is arranged at a first end 8 of the reclosure 4. The first end 8 limits a movement of the slider 5 along the profile strips 6a, 6b in a first direction. In an opposite movement of the slider 5 in a second direction, a separation of the previously locked together profile strip 6a, 6b, whereby the reclosure 4 is opened.

In the dargstellten, closed state of the reclosure 4, the gusset 2 is closed at its upper end of the above arranged profile strips 6 a, 6 b, ie covered. Fig. 3 shows the film packaging bag with an open reclosure 4, in which case the slider is arranged at a second end 9 of the reclosure, at the expediently also at least the profile strips 6a, 6b and possibly also the terminal lugs 7a, 7b permanently connected, for example by a seal are. With an open reclosure 4, the gusset 2 arranged at the first end 8 of the reclosure 4 can be folded out to form a chute, whereby an easy and accurate portioning of the contents contained in the film packaging bag is made possible. A folding out of the side fold 2 is already possible with a partial opening of the reclosure 4, so that the size of the removal opening can be chosen freely.

In the sectional view of Fig. 2a along the line AA the Fig. 1 is shown that the one terminal lug 7a is connected over its entire length with one of the front walls 1a and the other terminal lug 7b with the other front wall 1b, wherein the terminal lugs 7a, 7b with the adjoining profile strips 6a, 6b over the entire width the front walls 1a, 1b extend. In particular, the reclosure 4 extends at its first end 8 directly up to the side fold 2 which is folded in a V shape. In the closed state is thereby according to the Fig. 2b the gusset is closed above by the interconnected profile strips 6a, 6b. The profile strips 6a, 6b are designed in the usual way as tongue and groove elements, wherein one of the profile strips 6a is designed as a female element with undercuts and the other profile strip 6b as a male element with a spring.

According to the Fig. 2b and 2c the terminal lugs 7a and 7b are connected to the bag film 3 by heat sealing on the inside of the bag. Between the bag film 3 on the one hand and the terminal lugs 7a, 7b permanent sealing seams 10 are provided. In order additionally to achieve a tamper-evident closure, the terminal lugs 7a, 7b are each connected to the permanent sealing seam 10 with a peelable, that is separable sealed seam 10 'with each other or before a first opening of the film packaging bag with the fold-out gusset 2. On the one hand to produce permanent sealing seams 10 and on the other hand peelable sealing seams 10 ', portions of the bag film 3 may be coated such that a permanent connection is avoided here. Furthermore it is also possible to form the terminal lugs 7a, 7b from at least two layers, the material on the front wall 1a, 1b side facing a permanent seal and the material on the opposite side allow a peelable connection against itself and against the bag film.

A comparative consideration of Fig. 1 and the Fig. 2c It can be seen that the second side fold 2 'is not designed to fold out and below the terminal lugs 7a, 7b is covered by a separate sheet of foil 11. With the foil strip 11, the unfoldable side fold 2 'is closed and fixed to one of the front walls 1a. By the described embodiment can be avoided that one of the terminal lugs 7a, 7b must be placed on the fold-out gusset 2 ', whereby on the one hand the visual appearance of the foil packaging bag and on the other hand, the tightness could be impaired.

Furthermore, the sectional views of Fig. 2b and 2c can be seen that the bag film 3 is formed in multiple layers with an inner layer 12 and an outer layer 13. While the inner layer 12 is made of a heat sealable material, such as polyethylene, the outer layer 13 is preferably not heat sealable or has at least a higher sealing temperature. Suitable, for example, an outer layer 13 of polyethylene terephthalate, which is characterized by good mechanical properties and high quality optics. Also, the film sheet 11 may be formed multi-layered, wherein at least the side facing the side fold 2 'must be heat sealable. If the opposite side is difficult or impossible to seal, it can be avoided that the film label 11 is also inadvertently connected to the opposite front wall 1b.

Fig. 4 relates to an alternative embodiment of the film packaging bag as a stand-up pouch, in which at the first end 8 of the reclosure 4 a gusset 2 is inserted from a separate film section which extends only over a portion of the bag side. Below the side fold 2 and on the opposite side of the bag, the front walls 1a, 1b are connected directly to one another in a foot region of the bag. As a stand bottom 14 of the film packaging bag, a separate film section is provided. The gusset 2, which is used only in the upper area, serves to facilitate easier emptying and in particular precise metering and does not contribute to an increase in the filling space. The height and the depth of the gusset 2 can be selected depending on the intended filling material according to ergonomic considerations.

Since the reclosure 4 extends over the entire width of the front walls 1a, 1b, a rapid complete emptying of the film packaging bag is possible. As in the previously described embodiment according to the Fig. 1 to 2c but can also be provided here that the reclosure 4, starting from the fold-out, forming a chute gusset 2, only over a portion of the front walls 1a, 1b, for example, extends approximately to the center of the front walls 1a, 1b. Since the outlet opening is considerably increased by the folding out of the side fold 2, a comparatively short reclosure 4 according to the invention is already sufficient for good handling, in particular if no uncontrolled, complete emptying of the film packaging bag is to take place. Thus, even with a decanting of the filling material from the foil packaging bag usually requires a precise control of the product flow, so that here too a complete head-side opening is often not required or desirable.

Accordingly, the show Fig. 5 and the Fig. 6 Embodiments of gusseted bags, in which the reclosure 4 extends only over part of the width of the front walls 1a, 1b. According to the Fig. 5 the non-fold-out side fold 2 'is continued into the head region of the film packaging bag. In the upper region of this gusset, however, a planar seal 15 of the front walls 1a, 1b with the side gusset 2 'or the front walls 1a, 1b is provided with each other, wherein within the flat seal 15 a Griffausstanzung 16 is provided.

According to the Fig. 6 is not unfoldable gusset 2 'as previously described covered by a separate sheet of foil 11. In addition, an obliquely upward-running sealed seam 10 "is provided on the non-fold-out side fold 2 'starting from the associated side edge, which is continued in the head region of the film packaging bag on the front walls 1a, 1b and along its course the front walls 1a, 1b with the non-fold-out The obliquely running sealing seam 10 "thereby merges into the head-side sealed seam 10, with which the connection lugs 7a, 7b are connected to the front walls 1a, 1b. As a result of the obliquely upward-running sealed seam 10 ", the filling material arranged in the film packaging bag is guided in the direction of the formed outlet opening during emptying, so that an easy and complete emptying is made possible be when the reclosure 4 does not extend over the entire width of the front walls 1a, 1b. As an additional feature is in the embodiment according to the Fig. 6 provided that above the non-fold-out, offset side fold 2 ', the head portion is removed.

Alternatively to the in Fig. 5 In one embodiment, as a gusseted bag, handles 17 which are shown in FIG Be provided area of non-fold-out side gusset 2 '. The arrangement of such a handle is in the Fig. 6 indicated. Regardless of the specific embodiment of the foil packaging bag, alternatively, also grip bands or the like can be placed on the front walls 1a, 1b.

Fig. 7 shows a further embodiment of the gusseted bag according to the invention, in which the unfoldable side gusset 2 'as described above deposed and covered with a separate film sheet 11. In contrast to the previously described embodiments, the first end 8 of the reclosure 4 is arranged in the region of the gusset forming side gusset 2 such that this gusset 2 is fixed by the reclosure 4 in the unfolded state. This is achieved in that the reclosure 4 extends with its connecting lugs 7a, 7b beyond the region of the front walls 1a, 1b into the gusset-forming side fold 2. The second end 9 of the reclosure 4 can be arranged, for example, in the region of the center of the front walls or, as shown in the exemplary embodiment, on the opposite side above the offset side fold 2 '. So is in the in the Fig. 7 illustrated embodiment, the length of the reclosure 4 is greater than the width of the front walls 1a, 1b. Starting from an embodiment of Fig. 7 can also be provided that the reclosure 4 does not extend directly into the top of the gusset 2, in which case this tip can be folded and the top side of the reclosure 4 can be covered.

Claims (14)

Foil packaging bag with
two opposing front walls 1a, 1b formed from a bag film (3), a side fold extending from a head region of the film packaging bag over at least a portion of a bag side and there the opposite front walls (1a, 1b) connects to each other and
a transversely extending reclosure (4) arranged in the head region, comprising a slider (5), two profiled strips (6a, 6b) overlapped like a rider by the slider (5) and adjoining connecting lugs (7a, 7b), with which the reclosure (4) on the inside of the bag is connected to the bag film (3),
wherein a movement of the slider (5) limited by a first end (8) of the reclosure (4) along the profile strips (6a, 6b) in a first direction and an opposite, from a second end (9) of the reclosure (4 2), wherein the lateral fold (2) forms a chute when the reclosure (4) is open and in the case of a closed reclosure (4) the gusset (2 ) is concealed at its upper end forming the chute by the profiled strips (6a, 6b) arranged above it, characterized in that at the second end (9) of the reclosure (4) the connecting lugs (7a, 7b) directly adjoin the Front walls (1a, 1b) abut and with the front walls (1a, 1b) are connected. Film packaging bag according to claim 1, characterized in that the side fold (2) extends only over a partial region of the bag side and of a separate film section, which is inserted between the front walls (1 a, 1 b) is formed. Film packaging bag according to claim 1, characterized in that the side fold (2) is formed together with the front walls (1a, 1b) by folding out of the bag film (3). Film packaging bag according to one of claims 1 to 3, characterized in that opposite to the chute forming a side fold (2), a second, non-fold-out side fold (2 ') is arranged. Film packaging bag according to claim 4, characterized in that the non-fold-out side fold (2 ') ends at a distance from the head region and is covered at its upper end on the inside of the bag by a separate sheet of foil (11). Film wrapping bag according to claim 5, characterized in that in the upper region of the unfoldable, offset side fold (2 ') an obliquely upward from the associated side edge sealing seam (10 ") is provided, which in the head region of the film packaging bag on the front walls (1a, 1b) is continued and along its course, the front walls (1a, 1b) with the non-fold-out side fold (2 ') and the front walls (1a, 1b) connects to each other. Film packaging bag according to one of claims 4 to 6, characterized in that above the non-fold-out side fold (2 '), the head portion is removed. Film packaging bag according to one of claims 4 to 6, characterized in that on the side with the non-fold-out side fold (2 ') in the head region a Griffausstanzung (16) is provided. Film packaging bag according to one of claims 1 to 8, characterized in that the re-closure (4) extends only over part of the width of the front walls (1a, 1b). Film packaging bag according to one of claims 1 to 9, characterized in that the connecting lugs (7a, 7b) of the reclosure (4) over its entire length directly on the inside of the bag are attached to one of the front walls (1a, 1b). Film wrapping bag according to one of claims 1 to 9, characterized in that the first end (8) of the reclosure (4) is arranged in the region of the chute forming a gusset (2) that the gusset (2) of the reclosure (4) is fixed in an unfolded state. Film packaging bag according to one of claims 1 to 11, characterized in that the terminal lugs (7a, 7b) are separably connected to each other. Film packaging bag according to one of claims 1 to 12, characterized by a tamper-evident closure in the form of a peelable sealing seam (10 '). Foil packaging bag according to one of claims 1 to 13, characterized in that at the head area a re-closure (4) covering Foil section is provided, which is removable for the first time opening of the foil packaging bag and to release the slide (5).

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