Packaging bag, container and process

Abstract

The invention relates to a method for producing a packaging bag (1) and a packaging bag (1) for packaging liquid, granular, pasty, or powdery contents and for arranging it in a packaging bag container. The packaging bag (1) is formed by a top web element (2), a bottom web element (3), and two side gusset elements (6). The top web element (2) is arranged flat on the bottom web element (3) such that the side gusset elements (6) each have a side gusset (7) between the top web element (2) and the bottom web element (3), and that the arrangement of the top web element (2), bottom web element (3), and simply folded side gusset elements (6) forms a flat, multi-layered packaging bag material (5) with a longitudinally extending, approximately centrally located axis of symmetry (8) and a left and a right edge of the packaging bag material.The packaging bag material (5) is arranged such that the bottom web element (3) is positioned at the top. Parallel to one of the edges of the packaging bag material, at least one first bottom web fold (14) is arranged in the bottom web element (3) such that at least one edge of the bottom web element (3) is positioned almost centrally on the top web element (2) between an edge of the top web element (2) and the axis of symmetry (8) of the packaging bag material (5). Parallel to one of the edges of the packaging bag material, at least one second bottom web fold (18) is arranged in the bottom web element (3) such that the at least one first bottom web fold (14) is positioned on the top web element (2) in the region of the axis of symmetry (8) of the packaging bag material (5) by folding.A first top web fold (20) is arranged in the top web element (2) such that at least one edge of the top web element (2) is positioned almost centrally on the packaging bag material (5) in the region of the axis of symmetry (8) of the packaging bag material (5). The external dimensions of the packaging material (5) are reduced by forming at least one transverse fold (21) perpendicular to the axis of symmetry (8). The packaging bag material (5) is rolled up longitudinally.

Description

FIELD OF THE INVENTION

[0001] The invention relates to a method for producing a packaging bag for packaging liquid, granular, pasty, or powdery contents and for arranging it in a (packaging bag) container, in particular one having a rectangular, round, or oval outline, according to the preamble of claims 1 and 2. The container can be designed as a box, a tank, or a silo. The container shape can be cuboid, cylindrical, or any other shape. The container volume can be several hundred or several thousand liters (L), for example, approximately 300 L to approximately 10,000 L. The bag is prefabricated from several film webs and formed into a compact shape by arranging several folds (or roll sections).The packaging bag is formed by a first (film) web element, hereinafter referred to as the (film) top web element, and a second (film) web element, hereinafter referred to as the (film) bottom web element, and two (film) side-folding elements arranged between the top web element and the bottom web element. The top web element is arranged flatly on the bottom web element such that the side-folding elements lie flat, each with a side fold between the top web element and the bottom web element, and such that the arrangement of top web element, bottom web element, and simply folded side-folding elements forms a flat, multi-layer packaging bag material with a longitudinally running, approximately centrally located axis of symmetry and a left-hand and a right-hand packaging bag material edge. The packaging bag material is arranged such that the bottom web element is arranged on top.

[0002] The invention also relates to a packaging bag for packaging liquid or granular or pasty or powdery contents and for arranging the contents in a packaging bag container, in particular one having a rectangular outline, according to the preamble of claim 8.

[0003] The invention also relates to a packaging bag for packaging liquid or granular or pasty or powdery filling material and for arranging it in a volume-filling manner in a packaging bag container, in particular one having a rectangular outline, according to the preamble of claims 9 and 10. The packaging bag is accordingly formed by an upper web element and a lower web element and two side-folding elements arranged between the upper web element and the lower web element.The top web element is arranged flatly on the bottom web element such that the side-folding elements rest flatly on the bottom web element, each with a side fold between the top web element and the bottom web element. The arrangement of the top web element, bottom web element, and singly folded side-folding elements forms a flat, multi-layer packaging bag material with a longitudinal, approximately centrally located axis of symmetry and a left-side and a right-side packaging bag material edge. The packaging bag material is arranged so that the bottom web element is located on top.

[0004] Furthermore, the invention relates to a packaging bag container with a rectangular or square base, comprising a base and four side walls, according to the preamble of claim 12. TECHNOLOGICAL BACKGROUND

[0005] Large volumes of a free-flowing, i.e. liquid, granular, pasty, or powdery, filling material, for example approximately 1,000 liters or more of a liquid, are preferably packaged or stored in a sturdy (plastic) container. Particularly for hygiene reasons or to simplify container cleaning, the filling material is not placed directly in the container, but in a bag that fills the volume of the container's interior. The bag protects the filling material from external influences, while the container holds (and protects) the bag. Therefore, when the container is refilled, the empty bag must be replaced with a new, empty bag. The emptied bag is disposed of as waste, and cleaning of the container's interior is either not required or requires very little effort.

[0006] The problem with such packaging bags for packaging containers is how the bag behaves when being filled or emptied. If an unwanted kink or fold forms in the bag during filling, the bag cannot be filled completely or can only be filled with a considerable delay due to a constriction caused by the kink or fold. This leads to packaging containers regularly not being filled completely, i.e. the nominal volume is not reached during filling, which sometimes means that the bags have to be replaced more frequently. It can also happen that - due to said constrictions - the bag tears during filling. When emptying, it can happen that residue remains in the bag, which is also undesirable. Every emptied bag is disposed of with the waste.In this respect, difficulties in filling and emptying contribute to the fact that the use of bags can be economically less than optimal, while at the same time, ecologically unsustainable. For example, the separation of the materials involved (contents, packaging, outer packaging, etc.) should be as pure as possible, but residues in the packaging can be particularly problematic. This is where the invention comes in. PRESENTATION OF THE INVENTION

[0007] The problem underlying the invention is to provide a bag or packaging container with economically reasonable effort, wherein the bag volume efficiently adapts to that of the packaging container during filling, so that the packaging container can also be filled and emptied efficiently from an ecological point of view. This problem is solved by a method for producing a packaging bag according to claim 1. Further embodiments of the packaging bag are the subject of the auxiliary and dependent claims.

[0008] In the manufacturing method for producing the packaging bag described at the outset, it is accordingly provided that, according to a first method step, at least one first fold of a second web element, hereinafter referred to as the first bottom web fold, preferably a left-hand and / or right-hand first bottom web fold, is / are arranged in the bottom web element parallel to one of the packaging bag material edges in such a way that at least one edge of the bottom web element, in particular the left and / or right edge of the bottom web material, is / are arranged on the top web element by folding between an edge of the top web element and the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally between the edge and the axis of symmetry.

[0009] According to a subsequent further method step, at least one second fold, hereinafter referred to as a second bottom web fold, preferably a left-side and a right-side second bottom web fold, is / are arranged in the bottom web element parallel to one of the packaging bag material edges such that the at least one first bottom web fold, in particular the left-side and / or right-side bottom web fold, is / are arranged by folding on the top web element in the region of the longitudinal axis of symmetry of the packaging bag material. Instead of a second bottom web fold, at least one second bottom web rolled section can be formed by rolling up the packaging material in sections.

[0010] According to a subsequent further method step, a first fold of a first web element, hereinafter referred to as the first top web fold, preferably a left-side and a right-side first top web fold, is / are arranged in the top web element such that at least one edge of the top web element, in particular the left and / or right edge of the top web material, is / are arranged by folding on the packaging bag material in the region of the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally. Instead of a first top web fold, at least one first top web rolled section can be formed by rolling up the packaging material in sections. The top web rolled section and top web fold can be combined as desired in the described method step: fold on one or both sides, rolled section on one or both sides, rolled section on one side, fold on the other side.

[0011] According to a further subsequent method step, the external dimensions of the packaging material are reduced by forming at least one, preferably two, transverse folds running perpendicular to the longitudinal axis of symmetry and / or by rolling up the packaging bag material in the longitudinal direction.

[0012] When the bag is filled in the container, the bag is unfolded in a controlled manner. The unfolding process essentially takes place in the reverse order of folding / rolling and folding / rolling during bag production. First, the bag is unfolded or unfolded in the base area of ​​the container. As the fill level increases, the first top web folds / top web roll sections, the second bottom web folds / bottom web roll sections, and the first bottom web folds / bottom web roll sections are unfolded, with the bag steadily conforming to the inside of the container walls. A gap or hollow space between the bag and the inside of the container is largely avoided. In the upper area of ​​the container, the bag adapts to the shape of the container.The fact that the bag can unfold in a controlled manner and thus optimally fills the container when filled is the result of the functional folding comprising the process steps "arranging the first bottom web fold (first bottom web roll section)", "arranging the second bottom web fold (second bottom web roll section)", "arranging the first top web fold (first top web roll section)", "arranging the cross fold / rolling up" etc.

[0013] Efficient filling / emptying of a bag of a packaging container is further achieved with a manufacturing method according to claim 2. The method serves to produce a packaging bag for packaging liquid, granular, pasty, or powdery contents and for placement in a packaging bag container, in particular one with a rectangular footprint. The packaging bag is formed by a top web element and a bottom web element, as well as two side-folding elements arranged between the top web element and the bottom web element.The top web element is arranged flatly on the bottom web element such that the side-folding elements lie flat, each with a side fold between the top web element and the bottom web element. The arrangement of the top web element, bottom web element, and singly folded side-folding elements forms a flat, multi-layer packaging bag material with a longitudinal, approximately centrally located axis of symmetry and a left-hand and right-hand edge of the packaging bag material. The packaging bag material is arranged so that the bottom web element is located on top.

[0014] According to a first method step, at least one first lower web rolling section formed by sectionally rolling up the packaging material, preferably a left-hand and / or right-hand first lower web rolling section, is / are arranged in the lower web element parallel to one of the packaging bag material edges in such a way that at least one edge of the lower web element, in particular the left and right edges of the lower web material, is / are arranged between an edge of the upper web element and the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by rolling up on the upper web element.

[0015] According to a subsequent further method step, at least one second lower web roll section formed by sectionally rolling up the packaging material, preferably a left-hand and / or right-hand second lower web roll section, is / are arranged in the lower web element parallel to one of the packaging bag material edges in such a way that the first lower web fold / lower web roll section, in particular the left-hand and / or right-hand first lower web roll section, is / are arranged in the region of the longitudinally extending axis of symmetry of the packaging bag material by rolling up on the upper web element.

[0016] According to a subsequent further method step, a first top web roll section formed by section-wise rolling up of the packaging material, preferably a left-hand top web roll section and / or a right-hand first top web roll section, is / are arranged in the top web element such that at least one edge of the top web element, in particular the left and right edges of the top web material, is / are arranged in the region of the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by rolling up on the packaging bag material.

[0017] It can be provided that the top web element is arranged on the bottom web element at the beginning of the manufacturing process in such a way that the simply folded side folding elements do not overlap each other.

[0018] According to a further embodiment, fold features or roll section features can be combined with one another in any desired way. For example, a (bottom and / or top web) fold can be formed first before roll sections are formed. In the embodiments described below, each (first / second) bottom web fold can be replaced by a (first / second) bottom web roll section and / or each (first) top web fold can be replaced by a (first) top web roll section.

[0019] According to a preferred embodiment, at least one inlet and outlet means for the inlet and / or outlet of the contents, in particular at least one flange and / or a valve and / or a bung, is arranged in the packaging bag material, in particular in a top web element and / or in a bottom web element. Several inlet and outlet means can be provided. If several inlet and outlet means are provided, they can be of identical design, thereby simplifying arrangement in suitable packaging bag containers, in particular if different containers have the counterpart to the inlet and outlet means in different positions. The inlet and outlet means can also be of different design so that the bag fits containers that have different counterparts to the inlet and outlet means. Equipping the bag with several inlet and outlet means improves the variability of the bag's use.In the area of ​​the inlet and outlet means, a reinforcement of the upper or lower web element can be provided, for example a (plastic) film element formed as an adhesive label.

[0020] At least one channel element for the passage of the contents, in particular at least one tube, can be arranged in or on the packaging bag material, in particular in a top web element and / or in a bottom web element. The channel element can be made from a material that forms offcuts or residues during the manufacture of the packaging bag. The channel element can be equipped with a closure element. This improves, and in particular simplifies, handling of the packaging bag with virtually no additional material expenditure. This primarily applies to emptying or filling the bag, especially when the bag is arranged in the container.

[0021] To improve packaging properties such as stability or product compatibility, the top web element and / or the bottom web element and / or the side element can be formed in multiple layers. The top web element and / or the bottom web element and / or the side element can be sealed together during the production of the packaging bag by sealing, in particular ultrasonic and / or heat sealing.

[0022] With a view to using as little material as possible to produce a packaging bag and to being able to line the packaging bag container as completely as possible, the top web element and the bottom web element and the side element can have at least one taper at the end, in particular a symmetrical taper at each of the opposite ends of the longitudinal axis of symmetry. The packaging bag material is therefore narrower at the ends than in the region between the ends. If this taper or material saving is provided at only one end of the packaging bag material, the resulting geometry when viewed from above would be similar to the cross-section of a bottle.

[0023] A packaging for a (packaging) container for liquid or granular or pasty or powdery contents, which, during filling, adjusts its volume to that of a packaging container in a controlled manner, so that the packaging container can also be filled and emptied efficiently from an ecological point of view, is also achieved by a packaging bag according to claim 8. The packaging bag is therefore produced according to a manufacturing method for producing a packaging bag described herein.

[0024] A packaging for a (packaging) container for liquid or granular or pasty or powdery contents, which, during filling, adjusts its volume to that of a packaging container in a controlled manner, so that the packaging container can also be filled and emptied efficiently from an ecological point of view, is also achieved by a packaging bag according to claim 9. The packaging bag is therefore used for packaging liquid or granular contents and for arranging them in a volume-filling manner in a (packaging bag) container, in particular one having a rectangular, round, or oval outline. The packaging bag is formed by an upper web element and a lower web element, and two side-folding elements arranged between the upper web element and the lower web element.The top web element is arranged flatly on the bottom web element such that the side-folding elements rest flatly on the bottom web element, each with a side fold between the top web element and the bottom web element. The arrangement of the top web element, bottom web element, and singly folded side-folding elements forms a flat, multi-layer packaging bag material with a longitudinal, approximately centrally located axis of symmetry and a left-side and a right-side packaging bag material edge. The packaging bag material is arranged so that the bottom web element is located on top.

[0025] At least one first bottom web fold, preferably a left-hand and / or a right-hand first bottom web fold, is / are arranged in the bottom web element parallel to one of the packaging bag material edges such that at least one edge of the bottom web element, in particular the left and right edges of the bottom web material, is / are arranged between an edge of the top web element and the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by folds on the top web element.

[0026] At least one second bottom web fold, preferably a left-hand and / or right-hand second bottom web fold, is / are arranged in the bottom web element parallel to one of the packaging bag material edges such that the first bottom web fold, in particular the left-hand and / or right-hand first bottom web fold, is / are arranged by folding on the top web element in the region of the longitudinally extending axis of symmetry of the packaging bag material.

[0027] A first top web fold, preferably a left-side and / or a right-side first top web fold, is / are arranged in the top web element such that at least one edge of the top web element, in particular the left and right edges of the top web material, is / are arranged in the region of the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by folding on the packaging bag material.

[0028] The external dimensions of the packaging material are reduced by forming at least one, preferably two, transverse folds running perpendicular to the longitudinal axis of symmetry and / or by rolling up the packaging bag material in the longitudinal direction.

[0029] A packaging for a packaging container for liquid or granular or pasty or powdery filling material, which during filling adjusts its volume to that of a packaging container in a controlled manner, so that the packaging container can also be filled and emptied efficiently from an ecological point of view, is also achieved by a packaging bag according to claim 10. Parallel to one of the packaging bag material edges, at least one first lower web roll section formed by sectionally rolling up the packaging material, preferably a left-hand and / or right-hand first lower web roll section, is / are arranged in the lower web element such that at least one edge of the lower web element, in particular the left and right edges of the lower web material, is / are arranged between an edge of the upper web element and the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by rolling up on the upper web element.

[0030] At least one second lower web roll section formed by sectionally rolling up the packaging material, preferably a left-hand and / or right-hand second lower web roll section, is / are arranged in the lower web element parallel to one of the packaging bag material edges in such a way that the first lower web fold / lower web roll section, in particular the left-hand and / or right-hand first lower web roll section, is / are arranged in the region of the longitudinally extending axis of symmetry of the packaging bag material by rolling up on the upper web element.

[0031] A first top web rolling section formed by section-wise rolling up of the packaging material, preferably a left-hand top web rolling section and / or a right-hand first top web rolling section, is / are arranged in the top web element such that at least one edge of the top web element, in particular the left and right edges of the top web material, is / are arranged in the region of the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by rolling up on the packaging bag material.

[0032] The top panel element can be arranged flatly on the bottom panel element in such a way that the single-folded side-fold elements do not overlap each other.

[0033] A packaging for a packaging container for liquid or granular or pasty or powdery filling material, which during filling adjusts its volume to that of a packaging container in a controlled manner, so that the packaging container can also be filled and emptied efficiently from an ecological point of view, is also achieved by a (packaging bag) container according to claim 12. Accordingly, the packaging bag container has a rectangular or square outline. The container can also have a cylindrical or cylinder-like geometry. It has a bottom and at least one, preferably four, side walls. A packaging bag described herein can be arranged or is already arranged in the packaging bag container. The container can be formed as a cuboid or cube-shaped box. If the container is formed as a tank or as a silo, it can have a (circular) round or oval cross-section at least in sections. The container can be upright, i.e.with a vertical axis of symmetry, or lying (horizontal axis of symmetry).

[0034] For optimal volume utilization while simultaneously utilizing the packaging bag material efficiently, it is expedient for the packaging bag to unfold / unroll when filled with the contents such that the bottom web element and / or top web element and / or the side elements of the packaging bag are at least partially in contact with the bottom and / or side walls of the packaging bag container. It can also be provided that the bag unfolds laterally, for example, if the container is designed as a tank, such as a horizontal cylinder. If the container is designed as an upright cylinder, such as a silo, vertical unfolding is expedient in most cases.

[0035] When unfolded, at least one area of ​​the bag will come into contact with a (partial) surface of the container's inner wall, for example on the container base. It can be expedient if the container volume is slightly larger than the bag volume or if the bag volume is slightly smaller than the container volume. In this way, it can be achieved that not the entire outer surface of the bag comes into contact with the surface of the container's inner wall. This protects the bag wall, particularly when the container is being transported and the contents inside the container start to move. The movement of the contents causes the bag wall to move relative to the container wall, which causes abrasion of the surfaces in contact and thus additional stress on the bag material.By slightly differentiating the volumes, contact between the surfaces involved (bag outer surface, container inner surface) can be avoided in some areas, thus also reducing chafing. The smaller bag volume protects the bag material and allows the bag to be made of a thinner material—at least in some areas—which optimizes material consumption, weight, and thus handling.

[0036] In order to observe or control the filling process, the packaging bag container can be provided with a lid, in particular a removable or hinged lid, which is arranged on or at the side walls.

[0037] With a view to filling as simply and cleanly as possible, and thus hygienically, at least one inlet and outlet means can be provided for the inlet and / or outlet of the filling material, wherein the inlet and outlet means of the packaging bag container is fluidically connectable to an inlet and outlet means of the packaging bag arranged in the packaging bag container, so that the filling material does not get between the packaging bag and the packaging bag container inner wall during inlet or outlet.

[0038] The aforementioned components to be used according to the invention, as well as those claimed and described in the exemplary embodiments, are not subject to any special exceptional conditions in terms of their size, shape, material selection and technical conception, so that the selection criteria known in the field of application can be applied without restriction.

[0039] Further details, features, and advantages of the subject matter of the invention emerge from the dependent claims, as well as from the following description and the accompanying drawing, which illustrates, by way of example, an embodiment of a packaging bag. Individual features of the claims or embodiments can also be combined with other features of other claims and embodiments. BRIEF DESCRIPTION OF THE CHARACTERS

[0040] In the drawing show Fig. 1 shows a schematic 3D sectional view of the packaging bag (liner) and Fig. 2a, b to 7a, b, c each show a packaging bag in a schematic view and with different manufacturing or folding progress. DETAILED DESCRIPTION OF EMBODIMENTS

[0041] The Figuren 1 bis 7c each show a schematic view of a packaging bag 1. The arrangement of the side folding elements 6 of the bag 1 can Fig. 1 which shows a schematic 3D sectional view of the packaging bag 1. The side fold elements 6 each comprise a side fold 7, which is arranged parallel to the lateral edges 4A, 4B of the bag in the region of the centrally arranged axis of symmetry 8 of the packaging bag material 5. In the Figuren 2a bis 7c Different stages or steps of the manufacturing process are schematically illustrated. The top web element 2 and the bottom web element 3 of the bag 1 are welded or glued together at the edges 4A, 4B of the packaging bag material 5, or are connected (materially) by (heat) sealing. The top web element can be a type of 'roof web', the bottom web element can be a type of 'bottom web' - depending on which web element is positioned at the top or bottom during production. By swapping the position of the material, the top web element can be positioned at the bottom and the bottom web element at the top. When viewed independently of the position, a first and a second web element are processed, which are referred to in this description as the "top web element" and the "bottom web element" for the sake of clarity.

[0042] The packaging bag material 5 comprises, in addition to the upper web element 2 and the lower web element 3, two side-folding elements 6, which are Figuren 2a bis 7c cannot be recognized.

[0043] As in the Figuren 2a bis 4b As can be seen, the packaging bag material 5 comprises oblique or almost oblique cut edges 10 at the two ends 9A, 9B, whereby the material 5 tapers at the end. This saves packaging material on the one hand, and on the other hand, optimizes the adaptation of the material 5 to the packaging bag container in which the packaging bag 1 is to be arranged. If necessary, a tube or some kind of channel can be made from the cut-off material, which, when arranged on the bag, can serve as a filling or emptying aid. In this respect, no or almost no additional film material would be required for a filling or emptying tube.

[0044] Fig. 2a shows a plan view of the top web element 2 of the packaging bag material 5. An inlet and outlet element formed as a flange and / or bung and / or valve is arranged in the top web element 5, which is only indicated in the diagrams by the reference numeral 11. The bag 1 can be filled or emptied via the inlet and outlet element 11. In the vicinity of the inlet and outlet element 11, a material reinforcement 12 can be provided, which can be designed as an adhesive label or an additional material layer. The material reinforcement 12 can be glued or sealed to the top web element 2, for example by means of heat sealing or ultrasound.

[0045] The upper track element 2 is tightly connected to the lower track element 3. The lower track element 3 is in the Fig. 2b to see, wherein the arrangement according to Fig. 1b is achieved by the packaging bag material 5 according to Fig. 2a which is indicated by the round arrow 13 of the Fig. 2a / 2b After turning, the inlet and outlet means 11 are located on the underside of the arrangement ( Fig. 2b , the inlet and outlet means 11 being shown in dashed lines).

[0046] The manufacturing process for producing the packaging bag 1 comprises several process steps. In an initial step, the top web element 2, bottom web element 3, and side-folding elements 6 are cut and joined together to form a liner 5, and an inlet and outlet means 11 is arranged. It may also be provided that the web elements 2, 3 are first joined before they are cut. The result of this manufacturing process step is shown in Fig. 2a shown schematically. Then the liner 5, ie the packaging bag material 5, is turned ( Fig. 2b ).

[0047] In a subsequent process step, a first bottom web fold 14 is arranged in the (top) bottom web element 3 on each side by folding an edge-side section 15 of the bottom web element 3 in the direction of the central (in Fig. 3a horizontally running) axis of symmetry 8 is folded approximately halfway along the liner side 16A, 16B. Fig. 3a shows the first bottom web fold 14 on the material side 16B arranged below and Fig. 2b shows the additionally arranged first bottom web fold 14 in the area of ​​the upper material side 16A. The top web element 2 is in the Figuren 3a und 3b shown method step, so that the edges 17A, 17B of the top web element 2 remain in their position according to Figures 1a / 1b.

[0048] The Figuren 4a und 4b show a subsequent process step in which a second bottom web fold 18 is produced in the bottom web element 3 on both sides 19A, 19B (first on one side 19A of the liner 5, Fig. 4a , then on the opposite side 19B of the liner 5, Fig. 4b ). Every second bottom web fold 18 is created by folding an edge section of the bottom web element 3 in the direction of the central axis of symmetry 8. Every second bottom web fold 18 runs (almost) parallel to the first bottom web fold 14 or to the axis of symmetry 8. In the area of ​​the axis of symmetry 8, the folded areas of the bottom web 3 do not overlap; at best, the folded edges abut one another in the area of ​​the axis of symmetry 8.

[0049] Fig. 5a shows the next manufacturing process step, in which the top web element 2 (arranged in the figure below) is folded in the direction of the symmetry axis 8, whereby a (first) top web fold 20 is created. The arrangement of the (first) top web fold 20 is also carried out on each side edge of the liner 5 (ie according to Fig. 5a / 5b top and bottom). According to the Figuren 5a und 5b The process steps described above provide a liner 5 whose bottom web element 3 is folded twice on each side and whose top web element is folded once on each side 19A, 19B. The side folding elements 6 arranged between the top web element 2 and the bottom web element 3 are folded in the process steps described so far and in the process steps described below, since they are connected to the top and bottom web elements 2, 3. Figuren 2a bis 7c this was not shown.

[0050] The Liner 5 according to Fig. 5b is characterized by the fact that its dimensions are smaller than the Liner 5 Fig. 2a are significantly smaller, the folded liner 5 is narrower. To reduce the length of the folded liner 5, transverse folds 21 can be created, as shown in the Figuren 6a (first end) and Fig. 6b (first and second end of the liner 5). As the Figuren 7a bis 7c show that in a further process step, the multiply folded liner 5 is rolled up.

[0051] As a result, a packaging bag 1 is produced which is arranged in a compact manner, thus reducing the costs associated with shipping and storage. In addition, the compact bag 1 can be easily arranged in a packaging bag container. The inlet and outlet means 11 are accessible in the compact packaging bag 1 and can be connected to the counterpart of the container. When filling the bag 1, it will first unroll and then unfold in the reverse order of the steps according to Figures 6c to 1a. Accordingly, during filling, the bag 1 will expand such that the folds according to the (first) upper web fold 20 disappear, then the folds according to the second lower web fold 18, and finally the folds according to the first lower web fold 14. This happens successively, and in the process, the bag 1 adapts to the shape of the packaging bag container, i.e.First, the container base is lined with the filling bag 1, and as the fill level increases, the top web element 2 and / or bottom web element 3 and / or side-folding elements 6 conform to the container walls. It can be expedient if at least one element (2, 3, 6) or at least a portion of at least one element (2, 3, 6) does not conform to the inner surface of the container, but maintains a slight distance from it. By maintaining a slight distance between the outer surface of the bag and the inner surface of the container, the bag wall in particular is protected. If the priority is to protect the seams of the bag, the closest possible contact between the outer wall of the bag and the inner wall of the cup is more expedient. Undesired and uncontrolled kinks in the bag material 5, as well as hollow spaces between the bag 1 and the container wall, are avoided by the functional folding.This ensures that the container volume is optimally filled with the bag contents and unwanted and annoying deviations from the nominal volume are avoided.

[0052] Not shown in the figures is the option of rolling up the packaging material in sections during the production of bag 1 instead of folding it. Instead of a first (second) bottom web fold (top web fold), a first (second) bottom web roll section (top web roll section) would be formed. Folding or rolling can be done manually or automatically, with automated rolling requiring less equipment than automated folding. During filling, the bag would therefore not be unfolded but unrolled, or unfolded and unrolled. LIST OF REFERENCE SYMBOLS

[0053] 1Packaging bag 2Top web element 3Bottom web element 4A(left) edge 4B(right) edge 5Packaging bag material, liner 6Side fold element 7Side fold 8Symmetry axis 9A, 9BEnd 10Cut edge 11Inlet / outlet means 12Material reinforcement 13Arrow / direction 14First bottom web fold / first bottom web roll section 15Section 16A, 16BMaterial side 17A, 17BCedge 18Second bottom web fold / second bottom web roll section 19A, 19BSide 20(first) top web fold / (first) top web roll section 21Cross fold

Claims

1. A method for producing a packaging bag for packaging liquid or granular or pasty or powdery contents and for arranging it in a packaging bag container, in particular one having a rectangular layout, wherein the packaging bag is formed by a top web element and a bottom web element and two side-folding elements arranged between the top web element and the bottom web element, wherein the top web element is arranged flatly on the bottom web element such that the side-folding elements lie flatly with a side fold between the top web element and the bottom web element, and wherein the arrangement of the top web element, bottom web element, and simply folded side-folding elements forms a flat, multi-layer packaging bag material with a longitudinally extending, approximately centrally arranged, axis of symmetry and a left-hand and a right-hand packaging bag material edge,and wherein the packaging bag material is arranged so that the bottom web element is arranged on top, , characterized by that According to a first method step, at least one first bottom web fold, preferably a left-side and / or a right-side first bottom web fold, is / are arranged in the bottom web element parallel to one of the packaging bag material edges in such a way that at least one edge of the bottom web element, in particular the left and right edges of the bottom web material, is / are arranged between an edge of the top web element and the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by folding on the top web element, thatAccording to a subsequent further method step, at least one second bottom web fold, preferably a left-side and / or a right-side second bottom web fold, is / are arranged in the bottom web element parallel to one of the packaging bag material edges in such a way that the first bottom web fold, in particular the left-side and / or right-side first bottom web fold, is / are arranged by folding on the top web element in the region of the longitudinal axis of symmetry of the packaging bag material, thataccording to a subsequent further method step, a first top web fold, preferably a left-side and / or a right-side first top web fold, is / are arranged in the top web element such that at least one edge of the top web element, in particular the left and right edges of the top web material, is / are arranged in the region of the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by folding on the packaging bag material, and that According to a further subsequent method step, the external dimensions of the packaging material are reduced by forming at least one, preferably two, transverse folds running perpendicular to the longitudinal axis of symmetry and / or by rolling up the packaging bag material in the longitudinal direction.

2. A method for producing a packaging bag for packaging liquid or granular or pasty or powdery contents and for arranging it in a packaging bag container, in particular one having a rectangular layout, wherein the packaging bag is formed by a top web element and a bottom web element and two side-folding elements arranged between the top web element and the bottom web element, wherein the top web element is arranged flatly on the bottom web element such that the side-folding elements lie flatly with one side fold each between the top web element and the bottom web element, and wherein the arrangement of top web element, bottom web element and simply folded side-folding elements forms a flat, multi-layer packaging bag material with a longitudinally extending, approximately centrally arranged, axis of symmetry and a left-hand and a right-hand packaging bag material edge,and wherein the packaging bag material is arranged so that the bottom web element is arranged on top, , characterized by that According to a first method step, at least one first lower web rolling section formed by sectionally rolling up the packaging material, preferably a left-hand and / or right-hand first lower web rolling section, is / are arranged in the lower web element parallel to one of the packaging bag material edges in such a way that at least one edge of the lower web element, in particular the left and right edges of the lower web material, is / are arranged between an edge of the upper web element and the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by rolling up on the upper web element, thatAccording to a subsequent further method step, at least one second lower web roll section formed by sectionally rolling up the packaging material, preferably a left-hand and / or right-hand second lower web roll section, is / are arranged in the lower web element parallel to one of the packaging bag material edges in such a way that the first lower web fold / lower web roll section, in particular the left-hand and / or right-hand first lower web roll section, is / are arranged in the region of the longitudinally extending axis of symmetry of the packaging bag material by rolling up on the upper web element, and thatAccording to a subsequent further method step, a first top web rolling section formed by section-by-section rolling up of the packaging material, preferably a left-hand top web rolling section and / or a right-hand first top web rolling section, is / are arranged in the top web element in such a way that at least one edge of the top web element, in particular the left and right edges of the top web material, is / are arranged in the region of the longitudinal axis of symmetry of the packaging bag material, in particular almost centrally, by rolling up on the packaging bag material.

3. Method according to claim 1 or 2, characterized in that the top panel element is arranged flatly on the bottom panel element so that the simply folded side folding elements do not overlap each other.

4. Method according to one of claims 1 to 3, characterized in thatin the packaging bag material, in particular in an upper web element and / or in a lower web element, at least one inlet and outlet means for the inlet and / or outlet of the filling material, in particular at least one flange and / or a valve and / or a bung, is / are arranged.

5. Method according to one of claims 1 to 4, characterized in that the top panel element and / or the bottom panel element and / or the side element is / are formed in multiple layers.

6. Method according to one of claims 1 to 5, characterized in that The top web element and / or bottom web element and / or side element are sealed together by heat sealing.

7. Method according to one of claims 1 to 6, characterized in thatThe top web element and bottom web element and side element have / have at least one taper at the end, in particular a symmetrical taper at each of the opposite ends of the longitudinally extending axis of symmetry, whereby the packaging bag material is narrower at the end than between the ends.

8. Packaging bag (1) for packaging liquid or granular or pasty or powdery contents and for arranging the contents in a packaging bag container, in particular one having a rectangular base plan, characterized in that the packaging bag (1) is produced according to a method according to one of claims 1 to 7.

9. Packaging bag (1) for packaging liquid or granular or pasty or powdery filling material and for arranging it in a volume-filling manner in a packaging bag container, in particular one having a rectangular outline, wherein the packaging bag (1) is formed by an upper web element (2) and a lower web element (3) and two side-folding elements (6) arranged between the upper web element (2) and the lower web element (3), wherein the upper web element (2) is arranged flatly on the lower web element (3) in such a way that the side-folding elements (6) each lie flatly with a side fold (7) between the upper web element (2) and the lower web element (3), and that the arrangement of the upper web element (2), the lower web element (3) and the simply folded side-folding elements (6) forms a flat, multi-layer packaging bag material (5) with a longitudinally running, approximately centrally arranged,axis of symmetry (8) and a left-hand and a right-hand packaging bag material edge (17A, 17B), and wherein the packaging bag material is arranged such that the bottom web element is arranged at the top, , characterized by that parallel to one of the packaging bag material edges (17A, 17B), at least one first bottom web fold (14), preferably a left-side and / or a right-side first bottom web fold, is / are arranged in the bottom web element (3) such that at least one edge of the bottom web element (3), in particular the left and right edges of the bottom web material, is / are arranged between an edge of the top web element (2) and the longitudinal axis of symmetry (8) of the packaging bag material (5), in particular almost centrally, by folding on the top web element (2), thatparallel to one of the packaging bag material edges (17A, 17B) at least one second bottom web fold (18), preferably a left-side and / or a right-side second bottom web fold, is / are arranged in the bottom web element (3) such that the first bottom web fold (14), in particular left-side and / or right-side first bottom web fold (14), is / are arranged in the region of the longitudinally extending axis of symmetry (8) of the packaging bag material (5) by folding on the top web element (2), that a first top web fold (20), preferably a left-side and / or a right-side first top web fold, is / are arranged in the top web element (2) such that at least one edge of the top web element (2), in particular the left and right edges of the top web material, is / are arranged in the region of the longitudinal axis of symmetry (8) of the packaging bag material (5), in particular almost centrally, by folding on the packaging bag material (5), and that the external dimensions of the packaging material (5) are reduced in that at least one, preferably two, transverse folds (21) are formed which run perpendicular to the longitudinal axis of symmetry (8), and / or in that the packaging bag material (5) is rolled up in the longitudinal direction.

10. Packaging bag (1) for packaging liquid or granular or pasty or powdery contents and for arrangement in a packaging bag container, in particular one having a rectangular layout, wherein the packaging bag (1) is formed by a top web element (2) and a bottom web element (3) and two side folding elements (6) arranged between the top web element (2) and the bottom web element (3), wherein the top web element (2) is arranged flat on the bottom web element (3) in such a way that the side folding elements (6) lie flat with a side fold (7) between the top web element (2) and the bottom web element (3), and that the arrangement of top web element (2), bottom web element (3) and simply folded side folding elements (6) forms a flat, multi-layer packaging bag material (5) with a longitudinally extending, approximately centrally arranged, axis of symmetry (8) and a left-hand and a right-hand Packaging bag material edge (17A,17B), and wherein the packaging bag material (5) is arranged so that the bottom web element (3) is arranged on top, , characterized by that parallel to one of the packaging bag material edges (17A, 17B), at least one first lower web rolling section (14) formed by sectionally rolling up the packaging material (5), preferably a left-hand and / or right-hand first lower web rolling section, is / are arranged in the lower web element (3) such that at least one edge of the lower web element (3), in particular the left and right edges of the lower web material, is / are arranged between an edge of the upper web element (2) and the longitudinal axis of symmetry (8) of the packaging bag material (5), in particular almost centrally, by rolling up on the upper web element (2), thatparallel to one of the packaging bag material edges (17A, 17B), at least one second lower web rolling section (18) formed by sectionally rolling up the packaging material (5), preferably a left-hand and / or right-hand second lower web rolling section, is / are arranged in the lower web element (3) such that the first lower web rolling section (14), in particular left-hand and / or right-hand first lower web rolling section, is / are arranged in the region of the longitudinally extending axis of symmetry (8) of the packaging bag material (5) by rolling up on the upper web element (2), and thata first top web rolling section (20) formed by rolling up the packaging bag material in sections, preferably a left-hand top web rolling section and / or a right-hand first top web rolling section, is / are arranged in the top web element (2) such that at least one edge of the top web element (2), in particular the left and right edges of the top web material, is / are arranged in the region of the longitudinally extending axis of symmetry (8) of the packaging bag material (5), in particular almost centrally, by rolling up on the packaging bag material (5).

11. Packaging bag (1) according to one of claims 8 to 10, characterized in that the upper web element (2) is arranged on the lower web element (3) in such a flat manner that the simply folded side folding elements (6) do not overlap one another.

12. Packaging bag container with a rectangular or square base, comprising a bottom and four side walls, as marked,that a packaging bag (1) according to one of claims 8 to 11 can be or is arranged in the packaging bag container.

13. Packaging bag container according to claim 12, characterized in that the packaging bag (1) unfolds when filled with the contents in such a way that the bottom web element (3) and top web element (2) and the side folding elements (6) of the packaging bag (1) are at least partially in contact with the bottom and the side walls of the packaging bag container.

14. Packaging bag container according to claim 12 or 13, characterized in that a cover, in particular a removable one, is provided which is arranged on the side walls.

15. Packaging bag container according to one of claims 12 to 14, with at least one inlet and outlet means for the inlet and / or outlet of the contents, characterized in thatthe inlet and outlet means of the packaging bag container is fluidically connectable to an inlet and outlet means (11) of the packaging bag (1) arranged in the packaging bag container, so that the filling material does not get between the packaging bag and the packaging bag container inner wall when being inlet or outlet.

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