EP3020653A1 - Self-standing bag - Google Patents

Abstract

A stand-up pouch with a bottom respectively arranged at the lower end of a front wall (13) and a rear wall (14), which is formed by means of a bottom fold (4) which on the front side (13) with the front wall and on the back with the rear wall ( 14) is connected by seams (1, 2, 7, 8, 9, 10), wherein a folded edge (3) of the bottom fold (4) in a filled state of the stand-up pouch from a first corner of the bottom to an oblique, in particular diametral, opposite, the second corner of the floor is designed to increase the available usable volume and to form a less rounded, to be printed front with good stability characterized in that the floor stand has two side folds (15, 16). A method for producing such a stand-up pouch provides that after producing two longitudinal seams and the seams (1, 2, 7, 8, 9, 10) which determine the bottom contour, the side folds (15, 16) are moved against one another by displacing the front wall (13 ) and the rear wall (14) in the direction (F, G) whose areal extent are generated.

Description

The invention relates to a stand-up bag, which has a bottom arranged at the lower end of a front and a rear wall. This floor is formed by means of a bottom fold which is connected on the front to the front wall and on the back to the rear wall via seams, wherein a folded edge of the bottom fold in a filled state of the floor bag from a first corner of the floor to an oblique, in particular diametrically opposite, second corner of the floor runs.

A floor or stand-up bag according to the preamble of claim 1 is for example in the US 4810109 , optionally in the DE 20 2013 103 978 U1 disclosed. The bottoms of these stand-up pouches have seams on the edge, which converge on the front and the back of lateral longitudinal seams of the base pouch and in the folded pouch position, forming a generally blunt angle in a corner of the bottom. Typically, the side edges of the floor are rectilinear and angularly contiguous. To form a substantially rectangular bottom, the seams have a different length. In addition, the front and the rear wall are provided with mutually mirror-inverted seams, so that when filling the bottom along the height of the bag upwardly extending longitudinal seams, for example, a plastic bag at the bottom end diametrically opposite and accordingly the other corners or Edges of the floor on different sides with respect to the fold or fold edge of the bottom fold are arranged. The folding edge of the bottom fold runs correspondingly diametrically between the original longitudinal seams.

Although the illustrated prior art has a stable bottom, however, is due to this bottom upwards almost conical. On the one hand this is detrimental to the available useful volume, on the other hand it is unfavorable for a printing of the bag and the associated advertising function when the bag is presented on a shelf for sale purposes.

It is therefore an object of the present invention to form a stand-up pouch whose front side to be printed is less rounded and which is nevertheless made stable.

The object is achieved by an article according to claim 1 and by a method according to claim 12. Further advantageous embodiments of the invention are to be inferred from these claims dependent claims and the following description.

According to the invention, it is provided that the stand-up pouch has two side folds. This turns a nearly cone-shaped bag into a bag with a clearly defined front and high stability. As a result, wider film webs can be used at the same time resulting in bags with significantly greater useful volume.

If one of the gussets is part of a foil strip forming the front wall, while the other of the gussets is part of a foil strip forming the back wall, the manufacture of the self-supporting bag according to the invention is simplified despite the gussets with more complex bottom because the gussets do not need to be fed separately ,

Accordingly, it represents a solution of the above-described object, if preferably after production of two longitudinal and the bottom contour determining seams, preferably sealing seams, the gussets are produced by a mutually moving the front and the rear wall in the direction of their planar extension. Through this complicated shifting process, the integration of a gusset in the stand-up pouch is greatly simplified because it dispenses with complicated seam constructions in the floor area.

The production of the gussets by displacing the front wall and the rear wall relative to one another preferably in the direction of their areal extent can be achieved by gripping the already existing longitudinal seams which extend from the bottom of the upright bag in the direction of the head region and reducing the distance between the two. For example, the longitudinal seams can be moved toward one another or almost toward one another. Also, a mutually offset movement, in particular in the direction of the planar extension of the remaining front or rear wall can lead to the formation of gussets. Both longitudinal seams or instead the newly formed longitudinal edges of the gussets can be grasped and moved alternatively can also only one of the longitudinal edges -bzw. - seams are taken and moved. Preferably, both the longitudinal seams present on both sides as well as the region of the newly forming longitudinal seam are grasped and the front and rear walls are moved against one another. Alternatively or additionally, the area adjoining the longitudinal seams can also be grasped. Thus, a contour is generated which provides side folds from the material available for the front or rear wall (in particular film) and through which an advantageous, at least below the bag head form cuboidal shape when filling the stand-up pouch.

In the area of the inner edge of the gusset this can already pretreated to support the bending movement, for example, be embossed.

The embossing can go into the area of the seam closing downwards and also form a preferential fold line there. In order to produce a good stackability of the stand-up pouch, the fold edge runs obliquely into the seam at an angle which adjoins the bottom in a downward direction.

Particularly advantageous is an embodiment of a stand-up pouch according to the invention, in which by a third and fourth diametrically opposite corner of the bottom connecting connecting line is present, which crosses the folding edge of the bottom and is shorter than this. This corresponds to a rectangular shape of the floor, in which the adjoining bottom edges or the seams forming them have different lengths. In combination with the present invention two side gussets in particular the longer edge of the floor can be used as a conclusion of a wide front wall, so that a well-formed front without the known from the prior art quasi cylinder or truncated conical structure for information reproduction is available.

Advantageously, in the folded state and projected onto the plane of the flat extension of the stand-up pouch, that seam which forms a shorter side edge of the bottom is provided at a greater angle with the fold edge or fold than that seam which forms a longer side edge of the bottom. In particular, this is the seam that closes the side fold downwards. This leaves the larger areas free for front-side printing.

The gussets are preferably arranged at their lower end completely with respect to the folding edge on one side of the bottom fold, so that an introduction of the gussets is not complicated by the folding edge and also the folding and flattening of the bag for subsequent transport process can be performed more secure.

To improve the stability and a nearly rectangular configuration of the stand-up pouch, at least two, preferably four, of the outer longitudinal edges of the side folds extending from the bottom to the upper end of the stand-up pouch are sealed.

The formation of the respective gusset at each of the shorter edge of a rectangular bottom and completely on one side of the Bodenfaltkante supports the introduction of this gusset and folding for the purpose of subsequent stacking. It is the entire length of the bottom side without further edges or sealed areas for kinking available, so that the introduction of the gusset, possibly with simultaneous forced penetration of the side gusset forming area, is facilitated. The inner edge or inner fold edge of the respective side fold is in this case preferably provided at a distance from one of the longitudinal edges of the side fold, which is smaller than half the length of one of the adjoining bottom side edge forming seam.

In particular, in the folded state of the stand-up pouch, the inner edge of the (respective) side gusset ends in a bend of the seam provided for forming a bottom edge or crosses it. Gusset and bottom go well together, the stackability is improved by the flatter contour of the folded bag.

Preferably, in the folded state of the stand-up pouch, a bottom edge of the stand-up pouch extends obliquely over the entire width of the pouch on the front side. Thus, a small pack size, at the same time a stiffening of the front area not only in width but also in height and thus better stacking can be achieved.

Preferably, a stand-up pouch according to the invention having walls which are at least substantially formed by a single-layer or multi-layer plastic, paper or plastic-paper composite film is produced. At least substantially comprises, that in addition to the actual film material of course still printing inks, sealable inner layers (areas), seams and possibly also adhesive, spout or zipper and other other functional elements may be present. Nevertheless, the planar extent of the bottom, the side, front and rear walls is formed by a preferably formed as a film material material made of plastic or a corresponding plastic-paper composite film.

Regardless of this, for barrier purposes, there may additionally be a further barrier layer, which may consist, for example, of an aluminum-coated plastic layer or an aluminum layer.

Fig. 1

einen erfindungsgemäßen Gegenstand während des Herstellungsverfahrens,

Fig. 2

den Gegenstand nach Fig. 1 während eines nachfolgenden Verfahrensschritts entlang des Schnitts II-II nach Fig. 1 ohne Bodenansicht,

Fig. 3

den Gegenstand nach Fig. 2 nach einem nachfolgenden Verfahrensschritt

Fig. 4

den Gegenstand nach Fig. 3 in einer flachgelegten Variante,

Fig. 5 a - c

weitere erfindungsgemäße Ausführungsbeispiele.

Further advantages and details of the invention can be taken from the following description of the figures. In the pictures shows schematically:

Fig. 1

an article according to the invention during the manufacturing process,

Fig. 2

the object after Fig. 1 during a subsequent process step along the section II-II Fig. 1 without ground view,

Fig. 3

the object after Fig. 2 after a subsequent process step

Fig. 4

the object after Fig. 3 in a flattened variant,

Fig. 5 a - c

further embodiments of the invention.

Individual technical features of the embodiments described below can also be combined in combination with previously described embodiments as well as the features of the independent claims and any further claims to objects according to the invention. If appropriate, functionally equivalent elements are provided with identical reference numbers.

To form a stand-up pouch according to the invention, either a front or a back side foil can be sealed along longitudinal seams 1 and 2. Alternatively, a tubular film can be used, which is sealed on the long sides. Sutures are understood above and below seams which causes by heat sealing, gluing or ultrasonic welding or equivalent methods, a connection of adjoining, adjacent film areas.

A dot-dash line 3 indicates an inner folding edge of a likewise inner bottom fold 4. This can be created by folding the front or rear wall or by shooting a separate film. In a lower region 6, the longitudinal seams 1 and 2 are formed four-ply.

In the projection shown during the manufacturing process and in the view on the figure level according to Fig. 1 Forming a shorter side of the bottom forming seam 7, which runs on the front, with the seam 8, which forms an obtuse angle with the seam 7 with the folding edge 3 an obtuse triangle, a front side edge of the bottom. Dashed and corresponding mirror-inverted seams 9 and 10 are seams that are present on the rear wall of the stand-up pouch. The corner transitions of the seams 7, 8 and 9, 10 share the lowest edge of the film, for example in the ratio of 1/3 to 2/3. When filling the stand-up pouch, the bottoms formed by the seams 7 and 8 and 9 and 10 extend out of the plane of the figure to the front and rear and together then form a rectangular bottom sloping to the plane of the figure with short sides 7 and 10 and longer edges 8 and 9 off.

Dash-dotted lines 11 represent creases that represent outer edges of the gussets to be formed after the production of the gussets of the stand-up pouch. In order to make the phase of the production of the gussets process-reliable, the bag can be pretreated along these lines, for example embossed. The same applies to dash-dotted lines 12, which correspond to the inner fold edges of the gussets.

While in the Fig. 2 shown characteristic shift process in which a front wall 13 and a rear wall 14 are moved in the direction of the respective arrows F, G, gussets 15 and 16 form. These arise by kinking the at the inner edges 12 'adjacent areas against each other. The outer edges of the gussets are thus formed on the one hand by the seams 1 and 2 and on the other hand along the lines 11. Thanks to these lines can be used to manufacture the in Fig. 3 again shown a contour 1 'or 2' for stiffening and definition of the respective gusset are generated ( Fig. 3 ).

By pushing together the gussets, in which ultimately the side gussets 15, 16 are produced from a front wall and a rear wall 13, 14, the stand-up sack for the purpose of transporting to the processor results in a stacking in the Fig. 4 shown characteristic line or seam pattern in the floor area.

The sealed seam 8 is present transversely over the entire width of the front. It thus stabilizes the lower bag area. Starting from the bottom left in the figure of the stand-up pouch the side edge (seam 7) of the bottom via a bend 20 to the intersection with the fold edge 3 of the bottom fold 4. At the right edge with longitudinal seam 2 then runs on the back of the stand-up pouch trained part of the floor by means of a folded side seam 10 of the floor in the direction of the lower right corner, from which the longer side edge seam 9 extends to the longitudinal seam 1 on the back side of the stand-up pouch. In the view shown, the left seams 1 'and 1 are just as congruent as the right seams 2 and 2'.

At the upper end in the head region of the base bag, a spout 17 can be used for removal after filling with, for example, a liquid. alternative can the stand-up bag according to the invention at its upper end according to the embodiments of the Fig. 5a, 5b and 5c with either a zipper 18 ( Fig. 5a ), without reclosure ( Fig. 5b ) or with a slider 19 ( Fig. 5c ) be provided.

Claims (14)

Stand-up pouches having a bottom respectively arranged at the lower end of a front wall (13) and a rear wall (14), which is formed by means of a bottom fold (4) which on the front side (13) with the front wall and on the back with the rear wall (14 ) is connected by seams (1, 2, 7, 8, 9, 10), wherein a folded edge (3) of the bottom fold (4) in a filled state of the stand-up pouch from a first corner of the bottom to an oblique, in particular diametrically opposite , Second corner of the floor, characterized in that the stand-up pouch has two side folds (15,16). Stand-up pouch according to claim 1, characterized in that the one of the side folds is part of a foil forming the front wall, while the other of the side folds is part of a film strip forming the back wall and / or in particular that the side folds (15, 16) are displaced by a movement against one another Front wall (13) and the rear wall (14) preferably in the direction (F, G) whose areal extent are formed. Stand-up pouch according to one of the preceding claims, characterized by a connecting third and fourth diametrically opposite corner of the bottom connecting line, which crosses the folding edge (3) of the bottom and is shorter than this. Stand-up pouch according to one of the preceding claims, characterized in that in the collapsed state and projected onto the plane of the planar extension of the stand-up pouch that seam (7, 10) forming a shorter side edge of the bottom forms a larger angle with the fold edge (3) that seam (8, 9) forming a longer side edge of the bottom. Stand-up pouch according to one of the preceding claims, characterized in that the side folds (15,16) at their lower end with respect to the folding edge (3) each arranged completely on one side of the bottom fold and each forming at its lower end with a shorter side edge of the bottom Seam (7,10) are connected. Stand-up pouch according to one of the preceding claims, characterized in that at least two, preferably four, of the bottom from the bottom to the upper end of the stand-up pouch extending outer longitudinal edges of the side folds (15,16) are sealed. Stand-up pouch according to one of the preceding claims, characterized in that the inner edge (12 ') of the (respective) side fold (15,16) in its folded state in a kink (20) of the provided for forming a bottom edge seam (7) ends or this crosses. Stand-up pouch according to one of the preceding claims, characterized in that in the folded state a side edge forming seam (8) of the stand-up pouch on the front side extends obliquely over the entire width of the stand-up pouch. Stand-up pouch according to one of the preceding claims, characterized in that its walls are at least substantially formed by a single-layer or multi-layer plastic, paper or plastic-paper composite foil. Stand-up pouch according to claim 9, characterized in that it additionally has a barrier layer. A method for producing a stand-up pouch according to one of the preceding claims, characterized in that after production of two longitudinal and the bottom contour determining seams (1,2,7,8,9,10), the side folds (15,16) by a mutual displacement the front wall (13) and the rear wall (14) in the direction (F, G) whose areal extent are generated. A method according to claim 11, characterized in that the front and the rear wall (13,14) are shifted so far against each other, that the corners of the bottom under folding of these seams connecting (7,10) in the folded state on a particular longitudinal side trained side of the folded bag are arranged. Method according to one of claims 11 or 12, characterized in that the inner edge (12 ') of the gusset is pretreated to support the buckling movement. Method according to one of claims 11 to 13, characterized in that after the production of the gussets (15,16) whose still unsealed outer longitudinal edge is stiffened.

Images