EP2433879A1 - Stand bag for bulk goods and method for producing a stand bag - Google Patents

Abstract

The stand-up pouch has a front wall (1), a rear wall (2), a bottom fold (3) made of film, a bag top and a closure device. The front wall and the rear wall are connected with each other at a side edge (5a) and at another opposite side edge (5b). A carrying handle (6) is arranged on the side edge between the bottom fold and the bag top. An independent claim is also included for a method for manufacturing a stand-up pouch.

Description

The invention relates to a stand-up bag for bulk goods having a front wall, a rear wall and a bottom fold of film, with a bottom fold opposite bag head and with a closure device, wherein the front wall and the rear wall at a first side edge and at an opposite second side edge connected to each other are, wherein the bottom fold, which is provided as a floor standing, is connected to lower edges of the front wall and the rear wall, and wherein the closure device is mounted in the region of the bag head.

The invention also provides a method for producing a stand-up pouch. The stand-up pouch is usually formed by heat sealing, wherein the front and rear wall and the bottom and top folds are formed of a film, which are heat-sealable on their facing the interior of the pouch surface. Particularly suitable are multilayer films which are formed by coextrusion and / or lamination. Before the lamination printing can be applied, which can then be arranged internally protected in the lamination of the multilayer film. In the context of the invention, the front wall, the rear wall, the bottom fold and optionally arranged on the bag head head folds can be formed either of pieces of the same film or at least partially made of different films.

A stand-up pouch with the described features is suitable as packaging for liquid, pasty, powdery or granular products. The possible applications range from the packaging of beverages, liquid concentrates, liquid detergents, detergents, viscous personal care products up to to liquid or pelleted pet food, powdery or granular construction products, cereals, rice, sugar, flour or the like.

If, depending on the application, a liquid-tight closure is provided, the closure device can be designed, for example, as a pouring element in the form of a pouring spout, which can also have a cap to enable a reclosure. Such spouts are usually formed from a plastic and relatively stiff. The connection to the head fold as well as to the front wall and / or rear wall can be effected in a particularly simple manner by heat sealing, wherein a reliable sealing can be achieved by a fusion of the polymers.

Standing bag with the features described above are made EP 0 772 554 B1 . EP 1 233 915 B1 and EP 1 737 752 B1 known. Each of the stand-up pouches has a pouring spout with a screw cap which is fastened centrally to the upper edge of the stand-up pouch between the front wall and a wing of a head fold provided on the bag head. The filled stand-up pouch has a bulbous, approximately hexagonal shape and can be grasped by a user by hand and then handled similarly to a beverage can or beverage bottle. To allow embracing and thus easy handling of the bag, the stand bag must not exceed a certain size, so that good handling can be ensured only with small container sizes.

From the DE 39 25 981 A1 a pouch is known, which has a beak-shaped frangible extension as a spout and a handle in his head area. While the handle is disposed toward a front wall of the bag, the spout attaches to an upper portion of the rear wall. After opening the spout, the bag can be attached to the handle held and discharged by lifting the bottom of the bag. The bag is to be handled with two hands, the spout has only a low stability due to its central arrangement above the rear wall. The pouring of the filling material can thus be difficult to control, in particular, a precise pouring of the filling material into a filling opening or the like is difficult.

Against this background, the invention has for its object to provide a stand-up bag for bulk goods, which is easy and precise to handle even with a large receiving volume. Furthermore, a method for producing such a bag is to be specified.

Starting from a stand-up pouch with the features described above, the object is achieved in that is arranged on the first side edge between the bottom fold and the bag head and at a distance from the bottom fold and the bag head, a carrying handle. By arranging the carrying handle in an area between the bag head and the bottom fold, the stand bag is tilted when lifted to the carrying handle starting from the standing arrangement, correspondingly the bag head is lowered with the closure means disposed thereon, whereby a pouring is greatly facilitated. After opening the closure device, with a second hand of the user starting from a central position for controlling the pouring or dispensing with only comparatively little force raising or lowering of the bag head must be done, if not control of pouring or pouring with one hand by a corresponding tilting of the handle is possible. Since the carrying handle is arranged in the region of the first side edge, an optimal distribution of the load on the bag body can be achieved without the stand bag excessively deformed. Thus, a longitudinal sealing seam is usually arranged at least above and below the carrying handle, which causes a stiffening of the bag. The arrangement of a handle directly to a side edge, where the front wall connects directly to the rear wall, has not been considered in a stand-up bag so far.

Conveniently, the bag head is formed by a head fold, wherein the head fold is connected to upper edges of the front wall and the rear wall and wherein the closure device is attached on the one hand to the head fold and on the other hand to the front wall and / or the rear wall. In an embodiment with bottom fold and head fold, a substantially prismatic, tubular shape can be achieved, which provides an optimal filling volume in relation to the footprint and bag height.

The carrying handle can be arranged exactly in the middle between the bag head and bottom fold on the first side edge. Depending on the bag geometry and the intended filling, it may also be expedient to arrange the carrying handle, starting from a central arrangement, slightly upwards in the direction of the bag head or downwards in the direction of the bottom fold, the rest position being determined by the positioning of the carrying handle on the first side edge of the raised on the handle handle bag is determined. The carrying handle always has a certain extent and thus usually extends to a part of the front wall and the rear wall.

In order to further improve the handling of the bag, according to a preferred embodiment of the invention, the closure device is arranged not offset in the center of the bag head but in the direction of the second side edge. The closure device and the carrying handle are then arranged obliquely opposite, so that a handling results in the about the handling of a pot corresponds. In this case, the closure device can be arranged offset directly into the bag at the second side edge or starting from the second side edge. According to a further preferred embodiment of the invention, an obliquely angled corner region adjoins the upper end of the second side edge, wherein the closure device can then be arranged in this corner region. If the closure device is arranged offset in the direction of the second side edge, preferably at or at a small distance from the second side edge, there is also the advantage, in addition to the preferred arrangement obliquely opposite the carrying handle, that the area below the closure device is formed by the second side edge in FIG a considerable extent stiffened and reinforced. Although the front wall, the rear wall, the bottom fold and preferably provided on the bag head head folds are made of film, so an increased stability during pouring or pouring can be achieved, and also the risk of uncontrolled deformation of the bag is reduced due to the flexibility of the film. In particular, a higher stability is achieved than in known stand-up pouches.

For the design of the carrying handle on the first side edge arise within the scope of the invention, various possibilities. Thus, it is conceivable, for example, to provide the first side edge with a wide heat seal, which connects the front wall to the rear wall there, wherein at least one cut or at least one stamping is formed within this wide heat seal, in which a user can intervene.

According to a preferred embodiment of the invention, however, it is provided that the carrying handle comprises a separate film strip as a handle loop or part of a handle loop. Conveniently, in the region of the carrying handle there is no heat-sealing seam along the second side edge, however, it is expedient to form sealing seams above and below at a distance from the carrying handle.

When the front wall and the rear wall are heat-sealable on their side forming the outer surface of the bag, the separate film strip as a grip loop can be easily sealed to the bag outside. However, according to a preferred embodiment of the invention, if the film from which the front wall and the rear wall are formed is heat-sealable only on the side associated with the interior of the stand-up pouch, the separate film strip must be directly or indirectly attached to the inner surface of the front wall and rear wall be attached.

When using a foil strip as a handle loop arise while still further possibilities of structural design. The selection depends on the load and is dependent on the size of the bag or the filling weight for which it is designed. A first embodiment provides that the film strip is fastened to the bag inner side surface and accessible through a handle opening in the region of the first side edge. The attachment is preferably by heat sealing. The handle opening is liquid-tightly closed by a foil sheet, which is connected at the back of the film strip by a sealing seam surrounding the handle opening with the bag inner surface. Preferably, the handle opening is closed by a detachable film section of the front and rear walls in the region of the first side edge, so that the film engaging handle is initially arranged completely within the contour of the stand bag. Bag blanks, which preferably initially lay a bag making machine flat and leave unfilled, have smooth surfaces and as a result can be easily stacked and transported. Also the transport of filled stand-up pouches, for example in boxes or other packaging is not affected if the carrying handle is hidden behind a smooth outer surface.

When the carrying handle has to be designed for high loads, the following configuration is advantageous. The carrying handle has in this case an existing of the film strip loop which engages around a carrier sheet. The carrier sheet projecting on both sides of the loop is preferably secured to a rear sheet of film and / or to the inner surface of the bag, preferably by heat sealing. The carrying handle construction described has the advantage that the force acting while wearing the stand bag force is first distributed to the carrier sheet and thus on a large area. The even force distribution allows the transmission of large loads.

For smaller stand-up pouches, which are designed for a lower filling weight, the carrying handle can also be designed as a simple film strip. To attach such a simpler foil strip, it is advisable to thermally connect the ends through openings in the bag casing with a foil sheet, which is fastened with sealing seams on the bag inner surface and closes the openings in a liquid-tight manner. According to a further possible embodiment of the film strip, a reinforcing sheet is arranged on the inner surface of the bag and connected to the inner surface by heat sealing, wherein a handle loop is formed from a section of the bag film and the reinforcing sheet bounded at the edge by two slots. In addition, a closure sheet is provided, with which an opening formed by the grip loop is covered on the inside of the bag. In order to achieve an increased carrying capacity, the slots defining the grip loop can each be arranged between two sealing seams with which the reinforcing sheet is sealed onto the inner surface of the bag.

Usually, the front wall and the rear wall are connected at the second side edge by a longitudinal sealing seam. In particular, the front wall and the rear wall can be formed together from a foil blank in that the foil blank is folded onto itself along the first side edge. As already described above, when using a separate film strip on the first side edge a longitudinal sealing seam is arranged, which is interrupted along the carrying handle. A sealed seam is not necessary there because the front wall and the rear wall are formed from a common foil blank, which is folded onto itself along the first side edge. The front wall and the rear wall thus merge directly into one another at the first side edge. In order to integrate the bottom fold and preferably also a head fold, the front wall and the rear wall but above and below the carrying handle to be separated, wherein there is subsequently a connection by heat sealing. If in the region of the handle in the form of a separate film strip no heat seal and accordingly no sharp kink is present, the stand-up pouch when filled there has a bulbous shape. It is expedient that sealing seams arranged above and below the carrying handle end at a certain distance from the carrying handle, so that the stand-up pouch formed from foil can deform to a certain extent.

The head folds and the bottom folds usually have a central folding edge running in the transverse direction of the stand bag and two wings starting therefrom. As a rule, the bottom fold and the top fold have approximately the same dimensions. To improve the pouring or dispensing behavior, however, it may be advantageous if the bottom fold has a greater width than the head fold. This means that the bottom fold in the flat state of the stand bag forms a deeper fold than the head fold. The stand-up pouch has in the filled state accordingly to a certain extent upwardly tapered shape.

According to the present invention, in which the closure device is preferably arranged offset in the direction of the second side edge, the closure device can, depending on its design, on both wings and on the front wall and the rear wall or between only one of the wings on the one hand and the front wall or the rear wall on the other be used. The last-mentioned embodiment is particularly expedient if the closure device is designed as a pouring element, for example in the form of a pouring spout. Such a pouring element is usually made of rigid plastic and preferably comprises a cap which allows a reclosure. The cap can be attached for example by screwing or snapping.

The pouring element described may be provided in accordance with a particularly preferred embodiment of the invention in conjunction with an adjoining the second side edge, obliquely extending corner region, wherein the pouring element is arranged in the angled corner region. The pouring element is then arranged obliquely upward according to the discharge direction. Furthermore, it can be achieved by the described arrangement that the pouring element does not protrude substantially or not substantially beyond the base area when the bag is filled. The pouring element is thus advantageously secured against damage. If the pouring element does not protrude or does not protrude significantly beyond the base area, a small space requirement is also ensured, so that filled stand-up pouches can be packed tightly. Finally, by forming an angled corner region, in which the pouring element is arranged, a funnel effect in the direction of the pouring element can be achieved.

According to an alternative embodiment of the invention, the closure device has interconnectable reclosure strips. These can either be connected as a so-called zipper by manual pressure or train or as so-called slider with an additional slide and separated. With a slider closure, the slider must be accessible during use, for which it may need to be exposed before first use. Preferably, however, connectable reclosure strips are provided in the manner of a zipper, which can be arranged offset correspondingly in the bag. Such reclosing strips can be arranged either between only one of the wings on the one hand and the front wall or the rear wall on the other. However, an embodiment in which a reclosure strip is attached to both wings of the head fold and the other reclosure strip to the front wall and to the rear wall is preferred. In the context of such an embodiment, the head fold can be opened upwards in the case of an open reclosing device, so that a particularly large roughly diamond-shaped removal opening is formed. In order to close the closure device again, the head fold is then folded back between the front wall and the rear wall, wherein the closure strips are connected by compression. The reclosure strips are preferably arranged parallel or at least approximately parallel to the second side edge.

Depending on the nature of the closure device and the fastening of the closure device, it should be avoided as far as possible that the contents collect in corners or on edges and thus do not reach the closure device. To control the contents of the stand-up bag can be provided accordingly with additional Heißsiegelnähten. If, for example, reclosing strips are provided as closing means, underneath the reclosing strips, that is to say, in the direction of the standing floor, a connecting line extending from the second side edge obliquely upwards into the bag can be provided, at which the front wall is connected to the rear wall. The connecting line expediently ends approximately at the lower end of the closure strip.

According to a further aspect of the invention, provision may be made for the closure device to be concealed by a separable bag section before a first opening of the bag. Such a configuration is expedient particularly in the case of a closure device which has reclosable strips which can be connected to one another. Usually, the separable bag portion comprises parts of the front wall and the rear wall and optionally also a part of the head fold. It is also conceivable, the head fold previously formed correspondingly shortened, in which case at the connection of the head fold with the front wall and the rear wall sufficient sealing must be observed. In order to form the separable bag portion, for example, a line of weakness may be arranged between the second side edge and the closure device.

As a plastic film for the production of the bag offer a variety of polymers and material combinations. In particular, the stand-up pouch can be made of transparent polymers or equipped with windows in order to be able to recognize the fill level. Advantageous material combinations are, for example, PET / PE, OPP / PE, PET / OPA / PP, OPP / PP and PE / PE. In addition, transparent barrier layers can be formed by SiOx-coated films or by coextruded barrier polymer layers, e.g. B. EVOH be provided. As plastic films and composite materials may be used which have one or more layers of biodegradable and renewable resources. As examples are cellulose / starch-polyester and To name OPLA / PLA polyester compounds. However, composite materials which comprise a metallic intermediate layer or an intermediate layer of a metallized polymer are also particularly suitable for the stand-up pouch according to the invention. Advantageous material combinations are PET / Alu / PE, PET / Alu / PP and OPP (metallized) / PP.

The thickness of the plastic film depends largely on the bag size and the filling weight for which the stand-up pouch is designed. A stand-up pouch for liquids with a filling volume of about 2.5 liters can be made for example of a plastic film, the three-layer structure with a 12 micron thick outer layer of PET, a 12 micron thick intermediate layer of PET and a 100 micron thick polyethylene layer on the inside of the bag having. Finally, to increase the fall resistance, it is also possible to use fabrics in the film composite. Such a plastic film has, for example, a layer composite of PE / fabric / PE.

The invention also relates to a method for producing a stand-up pouch, which is designed in particular as described above, wherein a carrying handle assembly is placed with at least one foil strip on a foil section, wherein the foil section is subsequently folded onto itself to form a front wall and a rear wall in that the carrying handle arrangement lies on a first side edge of the folded film section, the front wall and the rear wall being separated along the side edge in the direction of the side edge, in front of and behind the carrying handle arrangement, whereby a bottom fold and preferably also a top fold are fed and aligned be inserted transversely to the side edge at a distance from each other between the front wall and the rear wall, wherein in the region of a bag head a closure device is arranged and being formed by heat sealing a closed stand-up pouch or on at least one side open bag blank.

After folding over of the film section, the edges of the film section opposite the first side edge usually form a second side edge, wherein the front wall and the rear wall are connected to each other over a part of the second side edge and not over the entire length of the side edge by a heat-sealing seam. An upper section and a lower section of the second side edge should first be excluded from a heat seal in order subsequently to be able to insert and fix the bottom fold and the top fold. For the same purpose, the partial separation of rear wall and front wall is also required on the first side edge, which is formed only by folding.

To produce stand-up pouches or bag blanks provided for later filling in large numbers, it is expedient first to supply a material web in the web longitudinal direction, wherein carrying handle arrangements are applied to this material web. Areas each having a handle assembly then correspond to the previously described film section. A separation of the first along the web continuously adjoining film sections is advantageously carried out after placing each of a handle assembly and preferably also after folding.

If the lateral edges of the foil sections, that is to say the material web, form a second side edge, the carrying handle arrangement is arranged correspondingly centrally in the transverse direction of the material web.

After separating the film sections, they are preferably transported perpendicular to the extent of the side edges in a transverse direction. During transport in the transverse direction, the further method steps, such as the introduction of the bottom fold and the top fold, can then be carried out sequentially one after the other or partly simultaneously. The bottom fold and the top fold can be supplied in particular as a continuous, folded band, in which case a cut takes place corresponding to the width of the individual folded foil sections. The top wall in the manufacturing process, ie the front wall or the rear wall, is expediently unfolded where the bottom fold and the top fold are arranged.

The attachment of the top and bottom folds as well as the integration of the closure device take place in several heat sealing steps. In particular, after inserting the head fold, a corner formed by the head fold, the front wall and the rear wall and adjoining the second side edge can also be cut off obliquely, with the closure device subsequently being fastened in the angled corner region. Such a configuration is particularly useful for the arrangement of a closure device in the form of the pouring element described above.

According to an alternative embodiment reclosable strip are arranged as closure means between inner surfaces of the front wall and the rear wall on the one hand and the head fold on the other hand. It is possible to unfold the corresponding area before feeding the head fold, wherein a first reclosing strip on which the second reclosure strip is latched, is sealed to the inner surface of the front wall and the inner surface of the rear wall. Then the head fold is fed and connected to the second closure strip. Alternatively, it is also possible the closure device with one of the reclosure strip first to be arranged on the head fold and then supply this head fold with the pre-assembled closure device.

When a closure device is attached with reclosing strip, it is also preferred to form a line of weakness which is located between the second side edge and the reclosure strip in the finished, closed stand-up pouch or one-side open pouch blank.

During the production of the stand-up pouch, heat-sealing seams can also be produced, which are essentially intended to lead the contents to the closure device. For example, the reclosing strips can be arranged at a distance from the second side edge, wherein between the second side edge and the reclosing device an obliquely extending, the front wall connecting to the rear wall sealing seam is formed. When pouring the contents is then passed along this oblique sealing seam in the direction of the closure device.

The invention is explained below with reference to figures, which represent only exemplary embodiments possible.

Fig.1

ein erfindungsgemäßer Standbeutel in einer perspektivischen Ansicht,

Fig. 2a bis 2h

einzelne Verfahrensschritte zur Herstellung des Standbeutels gemäß der Fig. 1,

Fig. 3a bis 3d

eine Abwandlung des in den Fig. 2a bis 2h dargestellten Verfahren zur Herstellung einer alternativen Ausgestaltung des erfindungsgemäßen Standbeutels,

Fig. 4a

eine Seitenansicht eines Standbeutels, der gemäß dem in den Fig. 3a bis 3d dargestellten Verfahrens hergestellt ist,

Fig. 4b

der Beutel gemäß der Fig. 4a im geöffneten Zustand,

Fig. 5

eine alternative Ausgestaltung eines erfindungsgemäßen Standbeutels in einer perspektivischen Ansicht entsprechend der Fig. 1.

Show it:

Fig.1

an inventive stand-up pouch in a perspective view,

Fig. 2a to 2h

individual process steps for the production of the bag in accordance with Fig. 1 .

Fig. 3a to 3d

a modification of the in the Fig. 2a to 2h illustrated method for producing an alternative embodiment of the stand bag according to the invention,

Fig. 4a

a side view of a bag, according to the in the Fig. 3a to 3d prepared method is produced,

Fig. 4b

the bag according to the Fig. 4a in the open state,

Fig. 5

an alternative embodiment of a stand bag according to the invention in a perspective view according to the Fig. 1 ,

Fig. 1 shows a stand-up bag for bulk goods with a front wall 1, a rear wall 2, a bottom fold 3 and a head fold 4, which are formed from foil. The front wall 1 and the rear wall 2 are connected to one another at a first side edge 5a and at a second side edge 5b. Arranged on the first side edge 5a in the vertical direction at half height is a carrying handle 6 which, in the exemplary embodiment, comprises a separate film strip 7. The film strip 7 together with the cut in the region of the handle 6 on the front wall 1 and the rear wall 2 bag film a handle loop that can be intervened laterally. In particular, it can be provided that the grip loop is first integrated by a perforation, not shown, in the outer surface of the bag and only to be exposed by tearing open this perforation.

Of the Fig. 1 It can be seen that according to the embodiment, the front wall 1 and the rear wall 2 are formed together from a foil blank in that the foil blank along the first side edge 5a is folded onto itself. This can be seen in that directly above and below the carrying handle 6, the front wall 1 without an additional connection passes through a sealed seam or the like directly into the rear wall 2.

The film blank is folded so that the edges of this film blank lie on the second side edge 5b and are connected there to a longitudinal sealing seam 8.

The bottom fold 3, which forms a floor stand, and the head folds 4 are fastened with transverse sealing seams 9 at lower edges of the front wall 1 and the rear wall 2 or at upper edges of the front wall 1 and the rear wall 2. Furthermore, the lateral ends of bottom fold 3 and head fold 4 are connected to the front wall 1 and the rear wall 2, for which purpose longitudinal sealing seams 8 and obliquely corner sealing seams 10 are provided. At the upper end of the second side edge 5b, an obliquely angled corner region 11 adjoins.

The stand-up pouch according to the invention also comprises a closure device which is fastened to the head fold 4 on the one hand and to the front wall 1 and / or the rear wall 2 on the other hand. Preferably, this closure device is arranged offset from the middle of the head fold 4 in the direction of the second side edge 5b. The Fig. 1 shows a particularly preferred embodiment in which a closure device in the form of a pouring element 12 in the immediate vicinity of the second side edge 5b in the angled corner region 11 is arranged. The pouring element 12 is thus arranged obliquely opposite the carrying handle 6, whereby a particularly easy handling is possible.

When the stand-up pouch is lifted on the carrying handle 6, the stand-up pouch moves from the illustrated vertical orientation into a horizontal orientation, in which case the pouring element 12 points obliquely downwards, whereby only comparatively small forces must be exerted for the control during a pouring out. Starting from a rest position of the raised to the handle 6 bag can be done with a relatively small amount of force tilting. Depending on the size of the bag and weight of the contents, the control of pouring or pouring the contents can be done by the user raises or lowers the bottom of the bag with his second hand or alone by tilting the handle 6, the desired position and inclination of the Pouring element 12 sets. The stand-up pouch can be used in the manner of a jug, whereby a very large stand-up pouch with a high weight can be handled well.

As a result of the described arrangement of the carrying handle 6 on the first side edge 5a and of the pouring element 12 in the vicinity of the second side edge 5b, overall the bag also has a particularly high stability. Thus, the longitudinal sealing seams 8 arranged above and below the carrying handle 6 contribute to a considerable stiffening and to a particularly uniform distribution of force. Also, the arrangement of the pouring element 12 immediately above the second side edge 5b in the obliquely angled corner region 11 a particularly high stability is achieved. Therefore, there is no risk during the pouring or pouring out of the filling material that the stand-up pouch deforms uncontrollably, as a result of which emptying of the pouch could be considerably hindered. Even in the case of a large stand-up pouch, the contents can be precisely metered and poured, for example, into a filling opening or the like.

That in the Fig. 1 shown pouring element 12 is made of a rigid plastic, for example by injection molding, formed and fixed liquid-tight between the front wall 1 and a wing of the head fold 4 by heat sealing. In order to achieve the most symmetrical arrangement possible, the two wings of the head fold 4 are connected to one another in the region of the pouring element 12, for example by connecting points made of adhesive. The pouring element 12 shown in the embodiment comprises a screw cap 13 and can be easily opened and closed again.

When filled, the stand-up pouch has a bulbous shape, whereby the carrying handle 6 arranged on the first side edge 5a can easily be grasped behind, since the first side edge 5a in the area of the carrying handle 6 is not provided with a longitudinal sealing seam and is not severely bent. Since the pouring element 12 is arranged in the obliquely angled corner region 11, this is also not or at least not substantially beyond the base of the bag and is thus protected to some extent against damage. In addition, several stand-up pouches can also be tightly packed next to each other, without the pouring elements 12 of the individual stand-up pouches being a hindrance.

As a film for the front wall, the rear wall, the bottom fold and head folds, in particular multi-layered embodiments are suitable, which are heat-sealable on at least one side. In order to check the level of the bag, especially transparent or translucent embodiments are particularly useful, being outside of the in the Fig. 1 not shown viewing window in the usual way a print can be provided. In the case of a multi-layer laminated bag film, the printing is usually produced before lamination and during lamination is arranged inside the bag film in order to protect the print against abrasion.

The Fig. 2a to 2h show the process steps for the preparation of in the Fig. 1 illustrated bag. According to the Fig. 2a First, a material web 14 of a bag film in the longitudinal direction of the material web 14 is supplied, being sealed at equidistant intervals on a heat-sealable side of the web 14 handle assemblies 15, each having the previously described film strip 7 and at least one back cover 16. Regions of the material web 14, each with a carrying handle arrangement, correspond to a film section from which a stand-up pouch is subsequently formed.

Of the Fig. 2a It can also be seen that the material web is folded into a half-tube in such a way that the carrying handle arrangement 15 lies on a first side edge 5a.

Subsequently, according to the Fig. 2b the superposed edges of the material web connected to a longitudinal sealing seam 8, which is interrupted in the longitudinal direction of the material web 14 at regular intervals. The formed longitudinal sealing seam 8 is arranged at the level of the carrying handle arrangement 15, whereby the edges of the material web 14 at the second side edge 5b are not sealed to one another at the individual film sections in front and behind. In a further, preferably downstream process step, cuts 17 are formed on the first side edge 5a in front of and behind the carrying handle arrangement. The cuts 17 are preferably produced by cutting off an outer edge of the self-folded film in the area of the first side edge 5a.

This separation of the front wall 1 and rear wall 2 formed by the folding of the material web 14 is necessary in order subsequently to be able to arrange the bottom fold 3 and the top fold 4.

Before that, however, there is a separation of the film sections which initially follow one another along the material web 14, wherein after the film sections have been separated, the film sections are transported perpendicular to the extent of the side edges 5a, 5b in a transverse direction ( Fig. 2c ). The successive film sections are transported in the transverse direction one behind the other, above and below the carrying handle assembly 15, the upper front wall 1 is folded back to attach prefolded material strips as head folds 4 and bottom fold 3 can. These strips of material formed from a film are initially provided as a continuous band for a plurality of film sections, wherein only subsequently a separation takes place.

To facilitate the fixation of bottom fold 3 and head fold 4, these are provided with punched holes 18. The folding back of the front walls 1 and the insertion of the bottom fold 3 and the head fold 4 are in Fig. 2d shown.

After folding back, not shown, the top and bottom end portions of the front wall 1 is according to the Fig. 2e the bottom geometry is formed by the production of a transverse sealing seam 9 and two corner sealing seams 10. Furthermore, at the head fold 4, a corner adjoining the second side edge 5b is cut off obliquely, whereby the in Fig. 1 illustrated oblique corner region 11 is formed.

According to the Fig. 2f Then at least the portion of the front wall 1 lying on the head fold 4 and preferably also a wing of the head fold 4 is folded back in order to connect the other wing to the rear wall 2 along a corner seam 10.

Like in the Fig. 2g shown, the closure device is then used in the form of the pouring element 12 between the not yet connected wings of the head fold 4 and the front wall 1 in the inclined corner region 11 and sealed. Subsequently, a transverse sealing seam 9 and corner sealing seams 10 are then formed on the head fold 4.

Furthermore, according to the Fig. 2h also not yet closed sections on the second side edge 5b closed with longitudinal sealing seams 8, wherein further longitudinal sealing seams 8 are generated opposite to the first side edge 5a above and below the handle formed by the handle assembly 15 carrying handle 6, which are in particular also provided to reinforce the first side edge 5a ,

Finally, not shown in the figures trimming the sealed bag edges can be done, and finally the two wings of the head fold 4 are fixed in the region of the pouring element 12, for example by means of adhesive points to each other.

According to an alternative embodiment of the stand-up bag, this reclosing strip 19a, 19b which can be locked together as a closure device has. The arrangement of the handle assembly 15 and the attachment of the bottom fold 3 is carried out as in the manufacturing process, which in the Fig. 2a to 2h is shown. For this purpose, reference is made to the above description.

In order to arrange the reclosing strips 19a, 19b, according to the Fig. 3a in a modification to the previously described method after the separation of the film sections of the portion of the front wall 1, where the head fold 4 is inserted, folded back. In the unfolded state, the closure device with one of the closure strips 19a is then applied to the inner surfaces of front wall 1 and rear wall 2 and sealed there. The other closure strip 19b is expediently engaged in the reclosing strip 19a fastened by heat sealing.

According to the Fig. 3b then the head fold 4 is fed and sealed in the unfolded state with the second reclosure strip 19b. Subsequently, the associated part of the front wall 1 is then folded back, so that the reclosure strips 19a, 19b are arranged in the region of the head fold 4 inside the bag.

According to the Fig. 3c then takes place after folding back the front wall 1, the arrangement of a transverse seam 9, a longitudinal sealing seam 8 in the second side edge 5b and a corner seam 10 in the region of the first side edge 5a.

According to the Fig. 3b the reclosure strips 19a, 19b are slightly offset from the second side edge 5b. In order to be able to open the stand-up pouch and to reach the closure device formed by the reclosure strips 19a, 19b, a line of weakness 20 is formed between the reclosure strips 19a, 19b and the second side edge 5b, for example by a laser or by a perforation ( Fig. 3d ). Subsequently, the previously formed sealing seams can be trimmed in the usual way. Preferably, an oblique sealing seam 21 is generated, which between the second side edge 5 b and a bottom edge of the reclosure strip 19a, 19b, the front wall 1 connects to the rear wall 2. This sealing seam 21 is intended to direct the contents in the direction of the reclosing strip 19a, 19b during a pouring out and to avoid an undesired accumulation of the filling material.

The Fig. 4a and 4b show the stand-up bag, according to the in the Fig. 3a to 3d is made shown method. While the Fig. 4a the stand bag shows in the closed state, is the Fig. 4b can be seen that after tearing off a separable bag portion 22 along the line of weakness 20, the head fold 4 can be turned upwards, which then a particularly large removal opening 23 is formed, in which the reclosure strips 19a, 19b are arranged approximately in the shape of a rhombus. In order to close the removal opening 23 again, the head fold 4 is again folded between the front wall 1 and the rear wall 2 and the reclosure strip 19a, 19b locked together by manual pressure.

The Fig. 5 Finally, shows an alternative embodiment of a bag according to the invention in a view according to the Fig. 1 , As a difference, the in Fig. 5 shown stand-up pouch only one bottom fold 3, wherein at the bag head, the front wall 1 and the rear wall 2 are connected directly to each other. The exemplary illustrated and arranged in a corner region 11 of the bag head pouring element 12 is sealed between the front wall 1 and the rear wall 2 accordingly. The further embodiment of the stand bag corresponds to the embodiment according to the Fig. 1 ,

Claims (20)

Standing bag for bulk goods having a front wall (1), a rear wall (2) and a bottom fold (3) made of foil, a bottom of the bag (3) opposite bag head and a closure device,
the front wall (1) and the rear wall (2) being connected to one another at a first side edge (5a) and at an opposite second side edge (5b),
wherein the bottom fold (3), which is provided as a floor standing, with lower edges of the front wall (1) and the rear wall (2) is connected and
wherein the closure device is fastened in the region of the bag head,
characterized in that at the first side edge (5a) between the bottom fold (3) and the bag head and at a distance from the bottom fold (3) and the bag head, a carrying handle (6) is arranged. A stand-up pouch according to claim 1, characterized in that the closure device is arranged offset on the bag head in the direction of the second side edge (5b). Stand-up pouch according to claim 2, characterized in that adjoining the upper end of the second side edge (5b) is an obliquely angled corner region (11), wherein the closure device is arranged in the corner region (11). Stand-up pouch according to one of claims 1 to 3, characterized in that the carrying handle (6) comprises a separate film strip (7) as a handle loop or as part of a handle loop. Stand-up pouch according to one of claims 1 to 4, characterized in that at the first side edge (5a) a longitudinal sealing seam (8) extends, which is interrupted along the carrying handle (6). Stand-up pouch according to claim 5, characterized in that the front wall (1) and the rear wall (2) are formed together from a foil blank in that the foil blank along the first side edge (5a) is folded onto itself. Stand-up pouch according to one of claims 1 to 6, characterized in that the bag head is formed by a head fold (4), wherein the head fold (4) is connected to upper edges of the front wall (1) and the rear wall (2) and wherein the closure means on the one hand to the head fold (4) and on the other hand on the front wall (1) and / or the rear wall (2) is attached. Stand-up pouch according to claim 7, characterized in that the head fold (4), starting from a central folding edge comprises two wings, wherein the closure means on both wings and on the front wall (1) and the rear wall (2) is fixed. Stand-up pouch according to claim 7, characterized in that the head fold (4) starting from a central folding edge comprises two wings, wherein the closure means is inserted sealingly only between one of the wings on the one hand and the front wall (1) or the rear wall (2). A stand-up pouch according to claim 9, characterized in that the closure device is a pouring element (12). Stand-up pouch according to one of claims 1 to 9, characterized in that the closure means connectable reclosable strip (19a, 19b). Stand-up pouch according to claim 11, characterized in that the reclosing strips (19a, 19b) are arranged parallel to the second side edge (5b). A stand-up pouch according to claim 11 or 12, characterized in that below the reclosing strip (19a, 19b) there is provided a connecting line running obliquely upwards from the second side edge (5b) into the stand-up pouch, on which the front wall (1) with the rear wall (2) is connected. A stand-up pouch according to any one of claims 1 to 13, characterized in that the closure device is covered by a separable bag portion (22) before a first opening of the pouch. Method for producing a stand-up pouch, in particular a stand-up pouch according to one of claims 1 to 14,
wherein a carrying handle arrangement (15) with at least one foil strip (7) is placed on a foil section,
wherein the film portion to form a front wall (1) and a rear wall (2) is subsequently folded onto itself such that the Carrying handle assembly (15) on a first side edge (5a) of the folded film section,
in the direction of the first side edge (5a) seen in front of and behind the carrying handle assembly (15), the front wall (1) and the rear wall (2) are separated in sections along the first side edge (5a),
wherein a bottom fold (3) is fed and inserted in an orientation transverse to the first side edge (5a) between the front wall (1) and the rear wall (2),
wherein in the region of a bag head a closure device is arranged and
wherein by heat sealing a closed stand-up pouch or at least one side still open bag blank is formed. The method of claim 15, wherein a web of material (14) is supplied with continuously adjoining film sections in a web longitudinal direction and wherein the film sections are separated after the arrangement of a partial handle assembly (15) and after folding. The method of claim 16, wherein after singulation the individual foil sections are transported perpendicular to the extension of the first side edge (5a) in a transverse direction. Method according to one of claims 15 to 17, wherein after inserting a head fold (4) of the bag head one of the head fold (4), the front wall (1) and the rear wall (2) formed and adjoining a side edge (5b) Corner is separated at an angle and then wherein the closure device in the inclined corner region (11) is attached. Method according to one of claims 15 to 17, wherein a reclosing strip (19a, 19b) having closure means between inner surfaces of the front wall (1) and the rear wall (2) on the one hand and a head fold (4) is arranged as a bag head on the other hand. A method according to claim 19, wherein a weakening line (20) is formed which is disposed between a second side edge (5b) and the reclosing strip (19a, 19b) in the finished closed stand-up pouch or one-side open pouch blank.

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