Packaging bag, container and method

Abstract

The invention relates to a method for producing a packaging bag (1) and a packaging bag (1) for packaging liquid or granular 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 side fold (7) in the right side fold element (6) is arranged so that it lies between the left edge (17) of the packaging bag material and the central axis of symmetry (8). The side fold (7) in the left side fold element (6) is arranged so that it lies between the right edge (17) of the packaging bag material and the central axis of symmetry (8). The side fold elements (6) are arranged so that they overlap each other in certain areas, with an overlap area (22) located between the left and right edges (17) of the packaging bag material.

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 the bag in a (packaging bag) container, in particular one having a rectangular, round, or oval outline, according to the preamble of claim 1. The container can be designed as a tank or a silo. The container shape can be cylindrical or any desired shape. The container volume can be several thousand liters (L), for example, approximately 5,000 L to approximately 10,000 L. The bag is prefabricated from several film webs and formed into a compact shape by arranging several folds. 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 in such a way that the side folding elements lie flat, each with a side fold between the top web element and the bottom web element, and that 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 running, approximately centrally arranged, axis of symmetry and a left-hand and a right-hand packaging bag material edge.

[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, according to the preamble of claim 9.

[0003] The invention also relates to a packaging bag for packaging liquid or granular or pasty or powdery contents and for arranging them in a volume-filling manner in a packaging bag container, according to the preamble of claim 10. The packaging bag is accordingly 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. The top web element is arranged flatly on the bottom web element such that the side-folding elements rest flatly, each with a side fold between the top web element and the bottom web element, and the arrangement of top web element, bottom web element, and singly folded side-folding elements forms a flat, multi-layer packaging bag material with a longitudinally extending, approximately centrally located, axis of symmetry and a left-hand and a right-hand packaging bag material edge.

[0004] Furthermore, the invention relates to a packaging bag container according to the preamble of claim 11. The packaging bag container accordingly comprises a base and one or more side walls. TECHNOLOGICAL BACKGROUND

[0005] Large volumes of a free-flowing, i.e. liquid, granular, pasty, or powdery, filling material, for example approximately 5,000 liters or more of a filling material, are preferably packaged or stored in a sturdy (metal or plastic) container, for example in a tank or silo. For hygiene reasons in particular 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 interior. The bag protects the filling material from external influences, and the container holds (and protects) the bag. Therefore, when the container is refilled, the previously emptied bag must be replaced with a new, empty bag. The emptied bag is disposed of as waste, and cleaning of the container interior is not necessary, or only requires very little effort.

[0006] Generic packaging bags are usually made from a paper or plastic web by laying out, cutting, folding and / or rolling and by joining measures such as gluing or sealing. PRESENTATION OF THE INVENTION

[0007] The problem underlying the invention is to provide technical measures by which a large-volume packaging bag container with a replaceable or renewable packaging bag therein can be used with the lowest possible material expenditure, so that no significant additional effort is required for the production, storage, packaging, and shipping of the packaging bag. This object is achieved by a method for producing a packaging bag according to claim 1. Further embodiments of the packaging bag are the subject of the subsidiary and dependent claims.

[0008] In the method described above for producing a packaging bag for packaging liquid, granular, pasty, or powdery contents, the side fold in the right-hand side fold element is arranged such that it lies between the left-hand edge of the packaging bag material and the central axis of symmetry. The side fold in the left-hand side fold element is arranged such that it lies between the right-hand edge of the packaging bag material and the central axis of symmetry. The side fold elements are arranged such that they overlap one another in certain areas, with the overlap region thus formed being arranged between the left-hand and right-hand edges of the packaging bag material. The axis of symmetry (running centrally between the lateral edges of the packaging material) is therefore located in the overlap region.The overlapping side gussets increase the volume of the unfolded (unrolled) and filled packaging bag. The external dimensions of the produced and unfilled packaging bag change little or not at all with the process according to the invention. The additional material expenditure associated with the increase in volume is limited to the somewhat larger side gusset elements. By folding the side gusset elements asymmetrically, i.e. with an offset, and by arranging them so that they overlap in some areas and thus on top of one another in some areas during production of the packaging bag, the external dimensions of the packaging bag material can be retained, so that the expenditure for storing, packaging and shipping the bags produced according to the invention is almost equivalent to the expenditure that would arise when producing a bag without the increased volume.

[0009] It can be provided that the corners of the packaging bag material are folded during bag production. According to a preferred embodiment of the manufacturing method, one or more sealing seams, in particular heat-sealing seams, or weld seams can be arranged at the edges of the top web element and / or the bottom web element and / or the packaging bag material. Reinforcing sealing seams / weld seams can be arranged, for example, diagonally in a corner region of the packaging bag material, thereby reducing mechanical stresses in the transverse and / or longitudinal weld seams.

[0010] The longitudinal side edges of the packaging bag material, which run parallel to the axis of symmetry, can be folded in the direction of the axis of symmetry. The narrow side edges, which run perpendicular to the axis of symmetry, can be folded perpendicular to the axis of symmetry. "Folding" here means that a section of packaging bag material is folded or rolled such that the section is subsequently arranged on or next to an adjacent section of packaging bag material. It can also be provided that, during the production of the packaging bag, the packaging bag material is rolled up in a direction perpendicular to the axis of symmetry in a final production step.

[0011] 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.

[0012] 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 applies in particular to emptying or filling the bag, especially when the bag is arranged in the container.

[0013] 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.

[0014] The use of a large-volume packaging bag container with an exchangeable or renewable packaging bag therein, so that no significant additional effort is required for the production, storage, packaging, and shipping of the packaging bag, is further achieved with a packaging bag according to claim 9. The packaging bag serves for packaging liquid or granular or pasty or powdery contents and for arranging them in a volume-filling manner in a packaging bag container. The packaging bag is formed according to a manufacturing method described and claimed herein.

[0015] The use of a large-volume packaging bag container with an exchangeable or renewable packaging bag therein, so that no significant additional effort is required for the production, storage, packaging, and shipping of the packaging bag, is further achieved with a packaging bag according to claim 10. 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. The top web element is arranged flatly on the bottom web element such that the side-folding elements rest flatly, 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-fold elements forms a flat, multi-layer packaging bag material with a longitudinal, approximately centrally located axis of symmetry and a left-hand and a right-hand packaging bag material edge. The side fold is arranged in the right-hand side-fold element such that it lies between the left-hand packaging bag material edge and the centrally running axis of symmetry. The side fold is arranged in the left-hand side-fold element such that it lies between the right-hand packaging bag material edge and the centrally running axis of symmetry. The side-fold elements are arranged such that they overlap one another in regions, with the overlap region thus formed being located between the left-hand and right-hand packaging bag material edges.

[0016] The use of a large-volume packaging bag container with an exchangeable or renewable packaging bag therein, so that no significant additional effort is required for the production, storage, packaging, and shipping of the packaging bag, is further achieved with a packaging bag container according to claim 11. The packaging bag container comprises a base and one or more side walls. A packaging bag described and claimed herein can be arranged or is arranged in the packaging bag container. It can be provided that the packaging bag container comprises at least one inlet and outlet means for the inlet and / or outlet of the contents.The inlet and outlet means of the packaging bag container can then be 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 when being inlet or outlet.

[0017] 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.

[0018] 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

[0019] In the drawing show Fig. 1a / 1b packaging bag material in schematic views. DETAILED DESCRIPTION OF EMBODIMENTS

[0020] The Figures 1a and 1b each show a schematic view of a packaging bag material 5. Fig. 1a shows a top view. In Fig. 1bA schematic side view is shown. The packaging bag material 5 comprises a top web element 2 and a bottom web element 3. A side fold element 6 is arranged on the outer (longitudinal) edges 17 of the top web and bottom web elements 2, 3. Each side fold element 6 comprises a side fold 7 or crease. For the purpose of clarifying the overlapping side folds 7, Fig. 1b an exaggeratedly large distance between the upper web element 2 and the lower web element 3 is shown. With the packaging bag material 5, often referred to as "liner", according to Figures 1a and 1b a packaging bag can be produced for a packaging bag container.

[0021] An offset is arranged between the side folds 7, so that the side fold elements 6 lie on top of each other ( Fig. 1a ) overlap each other in some areas. The area where the side folding elements 6 overlap each other is in Fig. 1ashown as overlap area 22.

[0022] The Fig. 1b It can be seen that the side fold 7 in the right-hand side folding element 6 is arranged such that it lies between the left-hand packaging bag material edge 17 and the centrally running axis of symmetry 8. The side fold 7 in the left-hand side folding element 6 is arranged such that it lies between the right-hand packaging bag material edge 17 and the centrally running axis of symmetry 8. The side folding elements 6 are arranged such that they partially overlap in the overlap region 22, wherein the overlap region 22 is arranged between the left-hand and right-hand packaging bag material edges 17.

[0023] By folding the bag components (2, 3, 6) with an overlap area 22, the bag volume can be increased with reduced material expenditure. Fig. 1aIt can also be seen that an inlet / outlet element is provided in the top track element.

[0024] If, for example, the liner 5 is intended for a (packaging bag) container with a round cross-section, the overlap (22) ensures that the liner 5 has a larger volume while the packaging bag material width remains unchanged (distance between the left and right edges 4, for example, approx. 700 mm). For example, a diameter increase from approx. 890 mm to approx. 1,100 mm can be achieved, so that the liner 5 can be used, for example, for a container with a volume above 6,000 l. Despite the increase in volume due to the overlapping side folds 7, the liner 5 intended for this purpose can still be manufactured so compactly (e.g. foldable and / or rollable) that there are hardly any additional costs, or no additional costs, for logistics, i.e. for packaging and shipping the manufactured liner 5. LIST OF REFERENCE SYMBOLS

[0025] 1Packaging bag 2Top web element 3Bottom web element 4Edge 5Packaging bag material, liner 6Side fold element 7Side fold 8Symmetry axis 11Inlet / outlet means 17Edge 22Overlap area 23Offset

Claims

1. A method for producing a packaging bag for packaging liquid or granular or pasty or powdery contents and for placement in a large-volume packaging bag container, 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, namely by a right-hand side-folding element and a left-hand side-folding 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, andcharacterized by that the side fold in the right side fold element is arranged so that it lies between the left-hand packaging bag material edge and the central axis of symmetry, that the side fold in the left side fold element is arranged so that it lies between the right-hand packaging bag material edge and the central axis of symmetry, and that the side folding elements are arranged in such a way that they overlap one another in some areas, with an overlapping area being arranged between the left-hand and right-hand packaging bag material edges.

2. Method according to claim 1, characterized in that the corners of the packaging bag material are folded in.

3. Method according to claim 1 or 2, characterized in that one or more sealing seams, in particular heat-sealing seams, are arranged on the edge of the upper web element and / or in the lower web element and / or in the packaging bag material.

4. Method according to one of claims 1 to 3, characterized in that the longitudinal side edges of the packaging bag material running parallel to the axis of symmetry are folded in the direction of the axis of symmetry, and / or that the narrow side edges running perpendicular to the axis of symmetry are folded perpendicular to the axis of symmetry.

5. Method according to one of claims 1 to 4, characterized in that the packaging bag material is rolled up in a direction perpendicular to the axis of symmetry.

6. Method according to one of claims 1 to 5, characterized in that in 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.

7. Method according to one of claims 1 to 6, characterized in thatthe top panel element and / or the bottom panel element and / or the side element is / are formed in multiple layers.

8. Method according to one of claims 1 to 7, characterized in that The top web element and / or bottom web element and / or side element are sealed together by heat sealing.

9. Packaging bag (1) for packaging liquid or granular or pasty or powdery contents and for arranging them in a packaging bag container to fill the volume, characterized in that the packaging bag (1) is produced according to a method according to one of claims 1 to 8.

10. Packaging bag (1) for packaging liquid or granular or pasty or powdery contents and for arranging the contents in a packaging bag container, 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), and wherein the top web element (3) is arranged flat on the bottom web element (2) 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 (17) forms, characterized by thatthe side fold (7) in the right side fold element (6) is arranged so that it lies between the left-hand packaging bag material edge (17) and the centrally running axis of symmetry (8), that the side fold (7) in the left side fold element (6) is arranged so that it lies between the right-hand packaging bag material edge (17) and the centrally running axis of symmetry (8), and that the side folding elements (6) are arranged such that they overlap one another in some areas, with an overlapping area (22) being arranged between the left-hand and right-hand packaging bag material edges (17).

11. Packaging bag container comprising a bottom and one or more side walls, characterized in that a packaging bag (1) according to claim 9 or 10 can be or is arranged in the packaging bag container.

12. Packaging bag container according to claim 11, comprising at least one inlet and outlet means for the inlet and / or outlet of the contents, characterized in that the 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 (1) and the packaging bag container inner wall when being inlet or outlet.

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