EP4065477B1 - Flat composite material, packaging casing and packaging with curved edges - Google Patents

Description

The invention relates to a sheet-like composite material for producing a pack, comprising: an outer polymer layer, a polymer inner layer, a fibrous carrier layer which is arranged between the polymer outer layer and the polymer inner layer, wherein the sheet-like composite material has a multiplicity of fold lines which are arranged and configured in such a way that by folding the sheet-like composite material along the fold lines and by connecting seam surfaces of the sheet-like composite material, a closed pack can be produced, a lateral surface, the lateral surface having a front surface, a first side surface, a second side surface, a first rear surface and a second rear surface comprises bottom surfaces, wherein the bottom surfaces comprise triangular bottom surfaces and quadrangular bottom surfaces, and gable surfaces, wherein the gable surfaces comprise triangular gable surfaces and quadrangular gable surfaces, wherein the bottom surfaces and the gable surfaces are arranged on opposite sides of the lateral surface.

The invention also relates to a pack casing made of a composite material for producing a pack, comprising: a casing surface, the casing surface comprising a front surface, a first side surface, a second side surface, a first rear surface and a second rear surface, bottom surfaces, the bottom surfaces triangular bottom surfaces and quadrangular bottom surfaces, gable surfaces, the gable surfaces comprising triangular gable surfaces and quadrangular gable surfaces, two false fold lines that run parallel to one another through the jacket surface, and a longitudinal seam that connects two edge areas of the composite material to form a peripheral packaging jacket that is both in the area of the Floor surfaces and in the area of the gable surfaces is open, with the floor surfaces and the gable surfaces opposite sides of the panel, and wherein the package panel is folded along both mock fold lines.

Finally, the invention relates to a pack made of a composite material, wherein the pack is made of a sheet-like composite material according to the preamble of patent claim 1, or wherein the pack is made of a pack jacket according to the preamble of patent claim 13, and wherein the pack in the area of the bottom surfaces and is closed in the area of the gable surfaces. In particular, it can be provided that the pack is made of a sheet-like composite material according to one of Claims 1 to 12 or that the pack is made of a pack jacket according to one of Claims 13 to 17, and wherein the pack in the area of the bottom surfaces and in the area of the gable surfaces is closed.

Packaging (when filled: "packages") can be produced in different ways and from a wide variety of materials. A widespread possibility of their manufacture consists in producing a “blank” from a sheet-like composite material by cutting to size, from which first a packaging jacket and finally a packaging are produced by folding and further steps. As an alternative to this, it is also possible to produce a packing directly from the composite material, ie without the intermediate step of the packing jacket. One of the advantages of this type of production is that the composite material and the packaging jackets are very flat and can therefore be stacked to save space. In this way, the composite material and the pack sleeves can be manufactured at a different location than the folding and filling of the pack. Composites are often used as the material, for example a flat composite of several thin layers of paper, cardboard, plastic and/or metal, in particular aluminum. Packs of this type are particularly widespread in the food industry.

A first production step often consists in producing a “blank” from a sheet-like composite material by cutting it to size and then producing a circumferential packaging jacket (“sleeve”) from the blank by folding and welding or gluing a seam. The folding usually takes place along embossed folding lines. The position of the fold lines often corresponds to the position of the edges of the pack to be produced from the pack casing. This has the advantage that the sheet-like composite material or the blank produced from it and the packaging jacket are only folded at points that are already folded in the finished packaging. A method for producing a pack from a pack casing is, for example, from WO 2015/003852 A9 known (there in particular Figures 1A to 1E ). The pack described there has a rectangular cross-sectional area and is cuboid overall.

However, a disadvantage of folding the pack jackets along the later pack edges is that only packs with angular cross-sectional areas can be produced. In addition, only packs whose cross-sectional area in the vertical direction of the pack is identical can be produced. However, alternative designs such as curves or free forms instead of the edges are not possible.

In order to enable a more variable shape, pack jackets have already been proposed whose folded edges do not correspond to the pack edges of the pack made from the pack jacket. This is achieved in that the packaging jacket is folded along what are known as "pseudo-fold lines", which are folded back again during manufacture of the packaging and thus do not form any edges of the packaging. This makes it possible to produce packs whose outer surface has no edges or at least no straight edges. Such pack jackets and packs made from them are, for example, from DE 10 2016 003 824 A1 known (there in particular Figure 2A to Fig. 3G').

Although the use of "phantom fold lines" allows some flexibility in designing the shape of the peripheral surface of a package, dummy fold lines do not contribute to increasing the stiffness of the package and may actually decrease the stiffness of the package by folding and folding back the mock fold line.

Another pack of curved fold edges is out DE 10 2016 003826 A1 known.

Against this background, the invention is based on the object of designing and developing the sheetlike composite material described at the outset and explained in more detail above in such a way that the production of packings, in particular liquid-tight packings, with even more complex geometries is made possible without impairing the rigidity of the packing.

This object is achieved in a sheet-like composite material according to the preamble of patent claim 1 by a third lateral fold line which has a plurality of sections which each adjoin a side surface and a rear surface, and of which at least one section is curved and of which at least one section is straight.

The sheet-like composite material according to the invention is used to produce a pack. The sheet-like composite material can be cut to a defined size, with the size being sufficient for the production of several packs or only for the production of a single pack. A composite material cut to a defined size--in particular the size of an individual pack--is therefore also referred to as a "cut".

The sheet-like composite material has a plurality of layers that are superimposed and connected to one another and in this way forms a sheet-like composite. The composite sheet material comprises an outer polymeric layer, an inner polymeric layer, and a fibrous backing layer disposed between the outer polymeric layer and the inner polymeric layer.

The polymer inner layer and the polymer outer layer impart liquid-tight properties to the composite material because they are made of plastic are. The fibrous carrier layer (preferably: paper or cardboard), on the other hand, serves above all to give the composite material improved mechanical properties, in particular improved rigidity. Optionally, a barrier layer can also be provided, which is also arranged between the outer polymer layer and the inner polymer layer (preferably between the fibrous carrier layer and the inner polymer layer). The barrier layer can be made of aluminum, for example, and is intended to prevent light and/or oxygen from passing through. The sheet-like composite material has a lateral surface that includes a front surface, a first side surface, a second side surface, a first rear surface and a second rear surface. The composite sheet material also has bottom surfaces, which include triangular bottom surfaces and quadrangular bottom surfaces. The composite sheet material further has gable surfaces, which include triangular gable surfaces and square gable surfaces. Preferably, the bottom surfaces and the gable surfaces each have two or three square surfaces and six triangular surfaces. The square surfaces are used to fold the bottom and top of the pack. The triangular panels serve to fold the excess composite material into protruding "ears" which are then applied to the pack. The bottom surfaces and the gable surfaces are arranged on opposite sides of the lateral surface. In the case of an upright pack, the gable surfaces are preferably arranged above the lateral surface and the bottom surfaces are arranged below the lateral surface. The sheet-like composite material also has a large number of fold lines which are arranged and designed in such a way that a closed pack can be produced by folding the sheet-like composite material along the fold lines and by connecting seam surfaces of the sheet-like composite material. The folding lines (in particular before folding also: "scoring lines") are therefore intended to facilitate folding of the sheet-like composite material; they can be caused by weakening of the material. Since the packs to be made from the composite material should be liquid-tight, the weakening of the material is not perforated, but (usually linear) Material displacements used, which are embossed with pressing tools in the composite material.

According to the invention, a third lateral fold line is provided which has a plurality of sections, each adjoining a side surface and a rear surface, and at least one section of which is curved and at least one section of which is straight. By providing a fold line between the side surface and the rear surface adjoining it, a fold edge with a defined profile is achieved, which facilitates the manufacture of the pack. The folded edge also improves the structural properties of the pack, in particular its rigidity, compared to a curved shape without any edges. The curved shape of the jacket fold line also makes it easier to create convex or concave surfaces, which create air gaps between adjacent packs that improve air circulation. The fact that straight sections are also provided in addition to curved sections in the case of the third lateral fold line simplifies the manufacture of the pack. Provision can be made for a third lateral fold line to be provided between the two side surfaces and the rear surfaces adjoining them, which has a plurality of sections which each adjoin a side surface and a rear surface, and of which at least one section is curved and of which at least one section is straight. Provision can furthermore be made for the third lateral fold line to have at least two curvatures which are directed in different directions, ie for example a first curvature in the direction of the side surface and a second curvature in the direction of the adjoining rear surface ("curved edge"). This results in a further improvement in air circulation between adjacent packs.

According to one embodiment of the sheet-like composite material, it is provided that the section of the third lateral fold line adjoining the base areas and the section adjoining the gable areas are straight. The inset of straight sections is adjacent to the floor surfaces and adjacent to the gable surfaces particularly advantageous as this allows the use of simpler tools to manufacture the bottoms and tops of the packs.

According to a further embodiment, it is provided that at least two sections of the third lateral fold line have opposite directions of curvature. In particular, it can be provided that a section is curved in the direction of the rear surface and that a section is curved in the direction of the side surface. In this way a packing can be achieved which has both convex and concave surfaces. Preferably, the portion of the third jacket fold line that is curved toward the side surface is located above the portion of the third jacket fold line that is curved toward the rear surface. This results in a broad, concave back of the pack in the top portion - particularly the top half - of the pack. Since the packs preferably have a narrow, convex front side in their upper area—particularly in the upper half—several packs can be placed in front of or behind one another to save space, so that good use of space is achieved. In addition, by using opposite directions of curvature, the filling volume reduced by one direction of curvature can be compensated for by the other direction of curvature, so that the pack height can remain unchanged for a given pack volume.

A further configuration of the sheet-like composite material is characterized by two false fold lines which run parallel to one another through the lateral surface. False fold lines are understood to mean fold lines which, in contrast to normal fold lines, do not later form edges of the pack but are arranged between the edges of the pack, for example in the side panels. False fold lines are used to produce a packaging jacket from the composite material, which is preferably folded flat along two false fold lines in order to be able to be stacked and transported in as space-saving a manner as possible.

According to one configuration of the sheet-like composite material, it is provided that the lateral surface has at least one relief surface, which is arranged between the front surface and one of the two side surfaces. The relief surface serves to create a transition that is as smooth as possible between the front surface and the side surface. The relief surface preferably extends over the entire height of the lateral surface, ie from the floor surfaces to the gable surfaces, and therefore separates the front surface from the two side surfaces. The technical effect of the relief surfaces is that the composite material does not need to be folded as much as a 90° edge of a cuboid pack, since the transition from the front surface to the two side surfaces is formed by two less kinked ("more blunt ") edging is done. This leads to less severe stresses on the composite material and in particular to a reduced risk of torn or broken fibers in the fibrous carrier layer (paper or paperboard layer) of the composite material. The lateral surface preferably has two relief surfaces which are arranged between the front surface and one of the two side surfaces. The relief areas also ensure that between packs arranged next to one another--in contrast to cuboid packs--a gap or free space is created between adjacent packs in the area of the relief areas, through which air can circulate. This has the advantage of reducing the risk of mold growth due to moisture. A further advantage of relief areas can be seen in the fact that the areas adjoining the relief areas can be made narrower and thus more stable, as a result of which increased grip rigidity can be achieved when pouring out the filled pack.

According to a further embodiment of the sheet-like composite material, it is provided that at least one relief surface is adjacent to a quadrangular base surface in the area of the base surfaces and to a triangular gable surface in the area of the gable surfaces. The triangular faces in the floor and gable areas are typically the side faces of a composite sheet material assigned and therefore border on the side surfaces of the pack made from it. The quadrilateral areas in the base and gable area, on the other hand, are typically assigned to the front area and the rear area of a sheet-like composite material and therefore border on the front and the rear of the pack made from it. By the relief area adjoining a different area in the base area than in the gable area, it is achieved that the relief area is assigned to the front of the pack in its lower area, while it is assigned to the side of the pack in its upper area. The relief surface therefore “winds” around an (imaginary) vertically running edge of the pack. This design of the relief areas has the advantage that the technical effects already described above (reduced stress on the composite material, improved air circulation) occur not only on one side of the pack but on two sides of the pack. As an alternative or in addition to this, it can be provided that at least one relief surface is adjacent to a triangular base surface in the area of the base surfaces and to a quadrangular gable surface in the area of the gable surfaces. Preferably, the mutually adjoining surfaces do not just touch at one point, but rather adjoin each other linearly—that is, along a distance.

According to a further embodiment of the sheet-like composite material, it is provided that between at least one relief surface and the front surface adjoining it, a first lateral fold line is provided, which is preferably curved at least in sections. By providing a fold line between the relief area and the front area, a fold edge with a defined course is achieved, which facilitates the manufacture of the pack. The folded edge also improves the structural properties of the pack, in particular its rigidity, compared to a curved shape without any edges. The curved shape of the jacket fold line also makes it easier to create convex or concave surfaces, which create air gaps between adjacent packs that improve air circulation. It can be provided that between the two relief surfaces and it adjoining front surface is provided in each case a first coat fold line, which is preferably curved at least in sections. Provision can also be made for the first lateral fold line to run in a continuously curved manner.

According to a further embodiment of the sheet-like composite material, it is provided that between at least one relief surface and the side surface adjoining it, a second lateral fold line is provided, which is preferably curved at least in sections. As already explained above in connection with the first lateral fold line, a fold edge with a defined course is also achieved by the second lateral fold line, which facilitates the manufacture of the pack. The folded edge also improves the structural properties of the pack, in particular its rigidity, compared to a curved shape without any edges. The curved shape of the jacket fold line also makes it easier to create convex or concave surfaces, which create air gaps between adjacent packs that improve air circulation. Provision can be made for a second lateral fold line to be provided between the two relief surfaces and the side surfaces adjoining them, which line is preferably curved at least in sections. Provision can also be made for the second lateral fold line to run in a continuously curved manner.

According to a further embodiment of the sheet-like composite material, at least one quadrangular gable surface is provided with two small gable surface angles that are smaller than 90°, with two large gable surface angles that are greater than 90° and with an angle sum that is greater than 360°. With angles that are not equal to 90°, a gable surface is achieved whose shape deviates from a rectangular or square shape. A quadrangular gable surface with two small (<90°) and two large (>90°) gable surface angles can be achieved, for example, with a trapezoid, a parallelogram or a rhombus. An angle sum that deviates from 360° can be achieved, for example, in that one or more sides of the square gable surface are not straight but curved (as is the case, for example, with an arc polygon or

arc polygon is the case). A sum of angles that is greater than 360° can be achieved in that at least one side of the quadrangular gable surface is curved outwards. The base surface angles, on the other hand, are preferably 90°, resulting in a rectangular, in particular square base shape. The design of the gable area according to the invention has several advantages. In addition to a more visually appealing shape, the technical effect is achieved that the packs to be produced from the sheet-like composite material can be gripped more easily with one hand, since one edge of the gable surface (preferably the front edge) is shorter than the other edges (especially the rear edge) , so the pack is narrower at the front. The design according to the invention also leads to the technical effect that the contact surface between packs arranged next to one another (e.g. during transport or on the sales shelf) is smaller than in the case of cuboid packs whose side surfaces touch almost completely. In other words, a gap or free space remains between packs arranged next to one another, through which air can circulate. This has the advantage of reducing the risk of mold growth due to moisture. The fact that the sum of the angles is greater than 360° also means that there is more space for a pouring element. The quadrangular gable surface preferably has an angle sum of at least 370°, in particular at least 380°, preferably at least 390°. Angle sums in the range between 390° and 410° have proven to be advantageous.

According to a development of the sheet-like composite material, it is provided that at least one of the quadrangular gable surfaces is approximately trapezoidal. Since the gable surface of the composite material is designed approximately in the shape of a trapezium, the gable of the pack produced from it also becomes trapezoidal. The trapezoidal shape has the advantage that one of the two parallel sides or edges (preferably the front edge of the gable) is shorter than the opposite side or edge (preferably the back edge of the gable) - in contrast to a rhombus, where the opposite sides are equal in length. This makes it possible to easily grab packs with a larger volume from the front with one hand.

A trapezoid is generally understood to be a quadrilateral in which two sides lie parallel to one another. Trapezoidal quadrilaterals are also to be understood here as quadrilaterals with curved sides, provided that when the four corners are connected by (fictitious) straight lines, two of these straight lines are parallel to one another.

According to one embodiment of the sheet-like composite material, it is provided that the quadrangular gable surface has a front edge adjoining the front surface, which is curved. Preferably, the front edge of the gable panel is curved toward the front panel as viewed from the gable panel. In this way, the gable area can be enlarged, which, for example, makes it easier to attach pouring elements with a larger diameter. A curved front edge of the gable also affects the shape of the front surface of the composite material and thus also the shape of the front of a package made from the composite material. In particular, an outwardly curved (convex) front side ("front panel") of the pack can be achieved by a front edge curved in the direction of the front surface. In addition to an attractive appearance, this also has the previously described technical advantage of improved air circulation between adjacent packs, which reduces the risk of mold formation.

According to a further embodiment of the sheet-like composite material, it is provided that the fibrous carrier layer of the composite material has a main fiber direction which runs approximately at right angles to a longitudinal edge of the composite material running from the floor surfaces to the gable surfaces. Paper and cardboard are materials made from pulp fibers. While the fibers are evenly distributed in all directions in traditional (manual) papermaking, a targeted alignment of the fibers can be achieved in machine papermaking. Since paper has different mechanical properties in the direction of the fibers than across the direction of the fibers (anisotropy), the alignment of the fibers can be used to obtain the optimal material properties for the respective application. The main fiber direction should run approximately at right angles to the two longitudinal edges of the composite material. Since the longitudinal edges run from the base area to the gable area (ie in the vertical direction in the case of the pack), this means that the main fiber direction in the case of the pack runs in the circumferential direction of the pack, ie runs around the lateral surface. This has the advantage that when the longitudinal edges of the pack are scored (which run transversely to the direction of the fibres), the cardboard fibers are broken. During the subsequent folding and reshaping, this leads to a pack with sharply defined pack edges and thus to improved pack stability. In particular, when the packs are subjected to compression loads (e.g. when stacking multiple layers on a pallet), there is a significant gain in stability compared to packs with fibers aligned in the longitudinal direction, since the packs only buckle under higher compression loads.

The object described at the outset is also achieved by a packing casing made from a composite material for producing a packing. The packaging casing comprises a casing surface, the casing surface having a front surface, a first side surface, a second side surface, a first rear surface and a second rear surface, bottom surfaces, the bottom surfaces comprising triangular bottom surfaces and quadrangular bottom surfaces, gable surfaces, the gable surfaces being triangular gable surfaces and quadrangular gable surfaces, two mock fold lines that run parallel to one another through the shell surface, and a longitudinal seam that connects two edge regions of the composite material to form a circumferential package shell that is open both in the region of the base surfaces and in the region of the gable surfaces, the base surfaces and the gable panels are located on opposite sides of the panel, and the package panel is folded along both false fold lines. With regard to those properties of the packing casing which are already present in the sheet-like composite material, reference is made to the relevant statements. The packaging casing has a longitudinal seam that connects two edge areas of the composite material to form a circumferential packaging casing. Due to the longitudinal seam, a flat - usually rectangular - cut of the Composite material in the circumferential direction closed, circumferential packing shell are produced. The longitudinal seam can be produced, for example, by gluing and/or welding. Because of the longitudinal seam, such packaging casings are also referred to as longitudinally seam-sealed packaging casings. The carton sleeve is folded along both mock fold lines, giving a front and a back - as well as an inside and an outside.

According to the invention, the packaging jacket is characterized by a third jacket fold line, which has a plurality of sections, each adjoining a side surface and a rear surface, and of which at least one section is curved and of which at least one section is straight. By providing a fold line, a fold edge with a defined course is achieved, which facilitates the manufacture of the pack. The folded edge also improves the structural properties of the pack, in particular its rigidity, compared to a curved shape without any edges. The curved shape of the jacket fold line also makes it easier to create convex or concave surfaces, which create air gaps between adjacent packs that improve air circulation. The fact that straight sections are also provided in addition to curved sections in the case of the third lateral fold line simplifies the manufacture of the pack. The other properties and advantages have already been explained in connection with patent claim 1 and can be transferred from the sheet-like composite material to the packaging jacket in a corresponding manner.

According to one embodiment of the packing jacket, it is provided that the packing jacket is made from a sheet-like composite material according to one of claims 1 to 12. Since the packing casing is made from one of the sheet-like composite materials described above, many properties and advantages of the sheet-like composite material also apply to the packing casing, so that reference is made to the relevant statements.

According to a further embodiment of the packaging jacket, it is provided that the composite material has at least one layer of paper or cardboard, which is covered at the edge of the longitudinal seam running inside the packaging jacket. The paper or paperboard layer is preferably the backing layer. The purpose of covering the layer of paper or cardboard is to avoid contact between the contents of the pack and this layer. On the one hand, this serves to prevent liquid from escaping through the - not liquid-tight - paper layer or cardboard layer and on the other hand to protect the contents of the pack from contamination through the paper layer or cardboard layer (e.g. pulp fibers).

For this embodiment, it is further proposed that the layer of paper or cardboard is covered by a sealing strip and/or by folding the composite material in the area of the longitudinal seam. One way of covering is to attach a separate sealing strip. The sealing strip can, for example, be made of the same material as the innermost layer of the composite material and can be glued or welded to this bearing. Another possibility for covering is to fold or fold the composite material in the area of the longitudinal seam. In this way, only the innermost layer of the composite material is revealed at the edge of the longitudinal seam running inside the packaging jacket. However, the innermost layer must in any case be made of a material suitable for contact with the contents of the pack.

In a further design of the packaging jacket, the composite material is peeled in the area of the longitudinal seam. A “peeled” composite material is understood to mean a composite material that has fewer layers in the peeled area than in the other areas. Peeling has the advantage of a less pronounced increase in thickness, particularly in the area where several material layers overlap. The use of peeled is therefore particularly advantageous Composite material when the composite material is folded or folded over - for example in the area of the longitudinal seam.

The object described at the outset is also achieved by a pack made of a composite material, the pack being made of a sheet-like composite material according to the preamble of patent claim 1, or the pack being made of a pack jacket according to the preamble of patent claim 13, and the pack is closed in the area of the floor areas and in the area of the gable areas. In particular, it can be provided that the pack is made of a sheet-like composite material according to one of Claims 1 to 12 or that the pack is made of a pack jacket according to one of Claims 13 to 17, and wherein the pack in the area of the bottom surfaces and in the area of the gable surfaces is closed. The package is characterized by a third panel fold line having a plurality of sections, each bordering a side panel and a rear panel, at least one section of which is curved and at least one section of which is straight. By providing a fold line, a fold edge with a defined course is achieved, which facilitates the manufacture of the pack. The folded edge also improves the structural properties of the pack, in particular its rigidity, compared to a curved shape without any edges. The curved shape of the jacket fold line also makes it easier to create convex or concave surfaces, which create air gaps between adjacent packs that improve air circulation. The fact that straight sections are also provided in addition to curved sections in the case of the third lateral fold line simplifies the manufacture of the pack. The other associated properties and advantages have already been explained above and can be transferred from the composite material and the packing casing to the packing in a corresponding manner. The packing can either be made directly from a composite sheet material or it can be made from a packing shell that has been previously made from a composite sheet material.

According to one configuration of the pack, it is provided that the section of the third lateral fold line adjoining the base areas and the section adjoining the gable areas are straight. As described above in connection with the composite sheet material, the use of straight sections adjacent the bottom panels and adjacent the top panels is particularly advantageous as it allows the use of simpler tooling to form the bottoms and tops of the packages.

According to a further embodiment of the pack, it is provided that at least two sections of the third lateral fold line have opposite directions of curvature. It can be provided that a portion is curved towards the rear surface and that a portion is curved towards the side surface. In this way a packing can be achieved which has both convex and concave surfaces. Preferably, the portion of the third jacket fold line that is curved toward the side surface is located above the portion of the third jacket fold line that is curved toward the rear surface. This results in a broad, concave back of the pack in the top portion - particularly the top half - of the pack. Since the packs preferably have a narrow, convex front side in their upper region—in particular in the upper half—several packs can be placed in front of or behind one another to save space, so that good use of space is achieved. In addition, by using opposite directions of curvature, the filling volume reduced by one direction of curvature can be compensated for by the other direction of curvature, so that the pack height can remain unchanged for a given pack volume.

According to one embodiment of the pack, it is provided that the pack has a fin seam in the area of the gable, which is folded over in the direction of the front surface. In the case of a sloping gable, for example, this design enables better drainage of moisture from the gable surface, since no upwardly open "pocket" forms in which moisture could collect. This configuration also allows more space to be achieved for a pouring spout sealed in from the inside.

According to a further embodiment of the pack, it is provided that the pack has a gable which is approximately trapezoidal. The trapezoidal shape of the gable has the advantage that one of the two parallel sides or edges (preferably the front edge of the gable) is shorter than the opposite side or edge (preferably the back edge of the gable) - as opposed to a rhombus, at which the opposite sides are equal in length. This makes it possible to easily grab packs with a larger volume from the front with one hand.

A further embodiment of the pack provides that the pack has a sloping gable. In particular, it can be provided that the gable of the pack falls forwards, ie is lower in the area of the front of the pack than in the area of the rear of the pack. The oblique course of the gable means that a pouring element arranged in the area of the gable impairs the stacking of packs less than in the case of packs with a flat gable. This is due to the fact that the pouring element in packs with a sloping gable - unlike in packs with a flat gable - does not necessarily form the highest point of the pack. In addition, better drainage of moisture from the gable surface can be achieved.

According to a further embodiment of the pack, it is provided that the pack has a convex shape in the area of the front surface and/or a concave shape in the area of the rear surfaces. In particular, it can be provided that the pack is convex in the upper area--particularly in the upper half--in the area of the front surface and/or in the upper area--particularly in the upper half--is concave in the area of the rear surfaces. Thanks to the combination of convex front and concave rear, the packs can be arranged in front of or behind one another to save space, despite their visually complex design.

Finally, according to a further embodiment of the pack, it is provided that the pack has a relief surface which partially lies in one plane with the front surface and which partially lies in one plane with a side surface. As already described above in connection with the sheet-like composite material, this design results in the relief surface winding from one side of the pack (e.g. the front) around a (fictitious) edge towards another side of the pack. The relief surface is therefore used to create a transition that is as smooth as possible between the front surface and the side surface. The relief surface preferably extends over the entire height of the lateral surface, ie from the floor surfaces to the gable surfaces, and therefore separates the front surface from the two side surfaces. The technical effect of the relief surfaces is that the composite material does not need to be folded as much as a 90° edge of a cuboid pack, since the transition from the front surface to the two side surfaces is formed by two less kinked ("more blunt ") edging is done. This leads to less severe stresses on the composite material and in particular to a reduced risk of cracked or broken fibers in the paper or paperboard layer of the composite material.

Fig. 1A:

ein aus dem Stand der Technik bekanntes flächenförmiges Verbundmaterial zum Falten eines Packungsmantels in einer Draufsicht,

Fig. 1B:

einen aus dem Stand der Technik bekannten Packungsmantel, der aus dem in Fig. 1A gezeigten flächenförmigen Verbundmaterial gebildet ist, in einer Vorderansicht,

Fig. 1C:

den Packungsmantel aus Fig. 1B in einer Rückansicht,

Fig. 1D:

den Packungsmantel aus Fig. 1B und Fig. 1C im aufgefalteten Zustand,

Fig. 1E:

den Packungsmantel aus Fig. 1D mit verschlossenem Boden,

Fig. 1F:

eine Packung, die aus dem in Fig. 1B gezeigten Packungsmantel gebildet ist, nach dem Verschweißen,

Fig. 1G:

die Packung aus Fig. 1F mit angelegten Ohren,

Fig. 2A:

ein erfindungsgemäßes flächenförmiges Verbundmaterial zum Falten eines Packungsmantels in einer Draufsicht,

Fig. 2B:

einen ersten Bereich des flächenförmigen Verbundmaterials aus Fig. 2A in vergrößerter Ansicht,

Fig. 2B:

einen zweiten Bereich des flächenförmigen Verbundmaterials aus Fig. 2A in vergrößerter Ansicht,

Fig. 3A:

einen erfindungsgemäßen Packungsmantel, der aus dem in Fig. 2A gezeigten flächenförmigen Verbundmaterial gebildet ist, in einer Vorderansicht,

Fig. 3B:

den Packungsmantel aus Fig. 3A in einer Rückansicht,

Fig. 4A:

eine erfindungsgemäße Packung, die aus dem in Fig. 3 gezeigten Packungsmantel gebildet ist, in perspektivischer Ansicht,

Fig. 4B:

die Packung aus Fig. 4A in einer Vorderansicht,

Fig. 4C:

die Packung aus Fig. 4A in einer Rückansicht, und

Fig. 4D:

die Packung aus Fig. 4A in einer Seitenansicht.

The invention is explained in more detail below with reference to a drawing that merely shows a preferred exemplary embodiment. Show in the drawing:

Figure 1A:

a plan view of a sheet-like composite material known from the prior art for folding a packaging jacket,

Figure 1B:

a packing jacket known from the prior art, which is known from Figure 1A shown sheet-like composite material is formed, in a front view,

Figure 1C:

the packaging jacket Figure 1B in a rear view,

Figure 1D:

the packaging jacket Figure 1B and Figure 1C in the unfolded state,

Figure 1E:

the packaging jacket Figure 1D with closed bottom,

Figure 1F:

a pack consisting of the in Figure 1B shown packing jacket is formed after welding,

Figure 1G:

the pack out Figure 1F with flat ears,

Figure 2A:

a sheetlike composite material according to the invention for folding a packaging jacket in a top view,

Figure 2B:

a first region of the composite sheet material Figure 2A in enlarged view,

Figure 2B:

a second region of the composite sheet material Figure 2A in enlarged view,

Figure 3A:

a packing jacket according to the invention, which consists of the in Figure 2A shown sheet-like composite material is formed, in a front view,

Figure 3B:

the packaging jacket Figure 3A in a rear view,

Figure 4A:

a pack according to the invention, which consists of in 3 shown packaging jacket is formed, in a perspective view,

Figure 4B:

the pack out Figure 4A in a front view,

Figure 4C:

the pack out Figure 4A in a rear view, and

Figure 4D:

the pack out Figure 4A in a side view.

Figure 1A shows a top view of a sheet-like composite material 1 known from the prior art, from which a packing jacket can be formed. The sheet-like composite material 1 can comprise several layers of different materials, for example paper, cardboard, plastic or metal, in particular aluminum. The composite material 1 has a plurality of fold lines 2 which are intended to facilitate the folding of the composite material 1 and divide the composite material 1 into a plurality of areas. The composite material 1 can be divided into a lateral surface 3 , a sealing surface 4 , bottom surfaces 5 and gable surfaces 6 . A packaging casing can be formed from the composite material 1 by folding the composite material 1 in such a way that the sealing surface 4 is connected, in particular welded, to the opposite edge region of the casing surface 3 . Apart from the sealing surface 4, the lateral surface 3 extends over the entire width of the composite material 1. The composite material 1 has two false fold lines 7 in the area of the lateral surface 3. The two mock fold lines 7 are straight and run parallel to one another. In addition, the pseudo-fold lines 7 run through a point of contact SB of three adjacent triangular surfaces 8 of the bottom surface 5 and through a point of contact SG of three adjacent triangular surfaces 8 of the gable surfaces 6. The pseudo-fold lines 7 divide the outer surface 3 into an inner partial area 3A and two outer partial areas 3B divided. The inner partial area 3A lies between the two false fold lines 7 and the outer partial areas 3B lie next to or outside of the two false fold lines 7.

The bottom surfaces 5 have four corner points E5 and the gable surfaces 6 have four corner points E6. The vertices E5, E6 represent vertices of the pack to be produced from the composite material 1. Each vertex E5 of a base surface 5 is assigned a corresponding vertex E6 of a gable surface 6, which is in each case that vertex E6 which is at standing Pack is arranged above this corner point E5. A corner axis EA runs through two associated corner points E5, E6, which would correspond to a vertical pack edge in a conventional cuboid pack. At the in Figure 1A In the composite material 1 shown, there are therefore four corner axes EA (for reasons of clarity, only one corner axis EA is always drawn in)--just as in the case of the packaging jacket produced from it and the packaging produced from it. No fold lines are provided between the corner points E5 of the bottom surfaces 5 and the corner points E6 of the gable surfaces 6 assigned to them—that is, along the corner axes EA.

Figure 1B shows a packing jacket 9 known from the prior art, which is known from Figure 1A shown sheet-like composite material 1 is formed, in a front view. The already related Figure 1A described areas of the packing jacket 9 are in Figure 1B provided with corresponding reference numbers. The packaging casing 9 was created from the composite material 1 in two steps: First, the composite material 1 is folded along the two false fold lines 7 . The two partial areas 3B (left) and 3B (right) of the lateral surface 3 are then connected to one another in the area of the sealing surface 4, in particular welded, as a result of which a (in Figure 1B hidden) longitudinal seam 10 arises. The carton jacket 9 therefore has an all-round structure that is closed in the circumferential direction, with an opening in the area of the base areas 5 and with an opening in the area of the gable areas 6. The front view shows the inner partial area 3A of the jacket area 3, which is bounded on both sides by the pseudo-fold lines 7 becomes. The other partial areas 3B of the lateral surface 3 are on the back of the packing casing 9 and therefore in Figure 1B concealed.

In Figure 1C the packing jacket 9 is off Figure 1B shown in a rear view. The already related Figure 1A and Figure 1B described areas of the packing jacket 9 are in Figure 1C provided with corresponding reference numbers. In the rear view, the two outer partial areas 3B of the lateral surface 3 are visible, which are connected to one another by the longitudinal seam 10 and on both sides of the Scheinfaltlinien 7 is limited. The inner portion 3A of the jacket surface 3 is on the front side of the packing jacket 9 and therefore in Figure 1C concealed.

Figure 1D shows the packing casing 9 Figure 1B and Figure 1C in the unfolded state. The already related Figures 1A to 1C described areas of the packing jacket 9 are in Figure 1D provided with corresponding reference numbers. The unfolded state is achieved by folding the packaging jacket 9 back along the pseudo-fold lines 7 running through the jacket surface 3 . The folding back takes place by about 180°. The result of folding back along the pseudo-fold lines 7 is that the two partial areas 3A, 3B of the lateral surface 3 adjoining the pseudo-fold line 7 no longer lie on top of each other, but are arranged in the same plane. The packing jacket 9 is therefore only in its flat state ( Figure 1B , Figure 1C ) folded along mock fold lines 7; in the unfolded state ( Figure 1D ) the packaging casing 9 (just like the packaging to be produced from it), however, is no longer folded along the dummy folding lines 7. Hence the designation "sham" fold lines 7.

Figure 1E shows the packing casing 9 Figure 1D with closed bottom. The already related Figures 1A to 1D described areas of the packing jacket 9 are in Figure 1E provided with corresponding reference numbers. The pre-folded state denoted (as in Figure 1D ) a state in which the fold lines 2 have been pre-folded in the area of the gable surfaces 6. The bottom surfaces 5, on the other hand, are already completely folded and welded, so that the packaging casing 9 has a closed bottom.

Figure 1F shows a pack 11, which is from the in Figure 1B shown packing jacket 9 is formed after welding. The already related Figures 1A to 1E described areas of the pack 11 are in Figure 1F provided with corresponding reference numbers. The pack 11 is shown after welding, ie in the filled and closed state. In the area of the bottom surfaces 5 and in the area of the gable surfaces 6, a fin seam 12 is created after closing.

While the fin seam 12 has already been applied to the pack 11 in the area of the bottom surfaces 5 , the fin seam 12 still protrudes from the pack 11 in the area of the gable surfaces 6 . Sections of the gable surfaces 6 are folded during the pre-folding (see Figure 1E ) are folded outwards and form protruding areas of excess material, which are also referred to as "ears" 13 and are applied to the pack 11 in a later manufacturing step - for example by gluing processes. In Figure 1F the ears 13 are still protruding from the pack 11 and are created in a later production step, for example by gluing.

Figure 1G shows the pack 11 Figure 1F with pricked ears. The already related Figures 1A to 1F described areas of the pack 11 are in Figure 1G provided with corresponding reference numbers. The upper ears 13 arranged in the area of the gable surface 6 are folded down and placed flat against the outer surface 3 of the pack 11 . The upper ears 13 are preferably glued or welded to the lateral surface 3 .

Figure 2A shows a plan view of a planar composite material 1' according to the invention for folding a packaging jacket. The already related Figures 1A to 1G The areas of the composite material 1' described are in Figure 2A provided with corresponding reference numbers. The bottom surfaces 5 of the composite material 1' can be divided into triangular bottom surfaces 5' and square bottom surfaces 5''. The triangular bottom surfaces 5' form ears 13 (see FIG Figure 1F ), which are folded inwards or outwards and applied to the pack; the square bottom surfaces 5", on the other hand, determine the shape of the bottom. In the case of the in Figure 2A In the composite material 1' shown, the corners of the four-cornered base surfaces 5" are approximately right-angled (α _B = 90°), so that a pack made from this composite material 1' also has an approximately rectangular, in particular approximately square base. Correspondingly, the gable surfaces 6 of the composite material 1' are subdivided into triangular gable surfaces 6' and into quadrangular gable surfaces 6". The triangular gable surfaces 6' form ears 13 (see Figure 1F ), which are folded inwards or outwards and applied to the pack; the square ones

Gable surfaces 6", on the other hand, determine the shape of the gable. With the in Figure 2A In the composite material 1' shown, the corners of the quadrangular gable surfaces 6" are not right-angled, but somewhat smaller (α _G1 <90°) or somewhat larger (α _G2 > 90°) than 90°, resulting in an approximately trapezoidal shape Packing made from this composite material 1' therefore also has an approximately trapezoidal gable.The small gable surface angles α _G1 are preferably in the range between 80° and 90°, while the large gable surface angles α _G2 are in the range between 90° and 100° quadrangular gable surface 6", which adjoins the front surface 14 is also referred to as the front edge V. The leading edge V is preferably curved towards the front surface 14 .

The lateral surface 3 of the in Figure 2A The composite material 1' shown has a plurality of fold lines, which divides the lateral surface 3 into a plurality of surfaces. The lateral surface 3 comprises a front surface 14, a first rear surface 15A and a second rear surface 15B, a first side surface 16A and a second side surface 16B, a first relief surface 17A and a second relief surface 17B. The front surface 14 adjoins the quadrangular bottom surface 5" in the base area and adjoins the quadrangular, trapezoidal gable surface 6" in the gable area. The front surface 14 laterally borders on the first relief surface 17A and on the second relief surface 17B. The two relief surfaces 17A, 17B also border in the bottom area (like the front surface 14) on the quadrangular bottom surface 5"; however, the two relief surfaces 17A, 17B each border on one of the triangular gable surfaces 6' in the gable area. The two side surfaces 16A , 16B border in the bottom area on one of the triangular bottom surfaces 5' and in the gable area they border on one of the triangular gable surfaces 6'. Laterally, the two side surfaces 16A, 16B border on their inner sides on one of the two relief surfaces 17A, 17B their outer sides to one of the two rear surfaces 15A, 15B (the first side surface 16A borders on the first rear surface 15A and the first relief surface 17A and the second side surface 16B borders on the second rear surface 15B and the second relief surface 17B) The two rear surfaces 15A, 15B border on the square in the bottom area Floor area 5" and border in the gable area on the square gable area 6". Laterally, the inner sides of the two rear surfaces 15A, 15B border one of the two side surfaces 16A, 16B (the first rear surface 15A borders the first side surface 16A and the second rear surface 15B borders the second side surface 16B).

At the in Figure 2A In the sheet-like composite material 1' shown, the lateral surface 3 has a plurality of lateral fold lines 18', 18", 18‴. The first lateral fold lines 18' delimit the front surface 14 laterally and form the boundaries between the front surface 14 and the two relief surfaces 17A, 17B. Preferably the two first lateral fold lines 18' are curved at least in sections. The two second lateral fold lines 18" form the boundaries between the two relief surfaces 17A, 17B and the two side surfaces 16A, 16B. The two second lateral fold lines 18" are preferably also curved at least in sections. The two third lateral fold lines 18‴ form the boundaries between the two side surfaces 16A, 16B and the two rear surfaces 15A, 15B. The two third lateral fold lines 18‴ are preferably also curved at least in sections The composite material 1' also has a paper or cardboard layer whose main fiber direction F is transverse (i.e. perpendicular to two longitudinal edges L running from the bottom surfaces 5 through the lateral surface 3 to the gable surfaces 6) through the surfaces 14, 15A, 15B forming the lateral surface , 16A, 16B, 17A, 17B and thus runs in the circumferential direction of the pack in a pack made from this composite material 1' Furthermore, the composite material 1' has a weakened zone 19 which can serve to define the position of a pouring element. The zone of weakness 19 can be implemented as an overplated hole or as a hole punched completely through the composite material 1'.

Figure 2B shows a first region of the composite material 1' Figure 2A in enlarged view. The already related Figures 1A to 2A The areas of the composite material 1' described are in Figure 2B provided with corresponding reference numbers.

The first - in Figure 2B The illustrated area of the composite material 1′ relates to the area of the gable surfaces 6, in particular the area of the gable surface angles α _G1 , α _G2 . As already described above, the corners of the square gable surfaces 6" are not right-angled, but slightly smaller (α _G1 < 90°) or slightly larger (α _G2 > 90°) than 90°. For the rear (the back of the pack associated) gable surface angle α _G1 , the deviation from a right angle is due to the fact that one of the two fold lines adjacent to the angle α _G1 does not run at right angles to the edge of the composite material 1', but is inclined by an angle β ₁ to a vertical S ₁ ( α _G1 = 90°- β ₁ ). There are two reasons for the deviation from a right angle for the front gable surface angles α _G2 (assigned to the front of the pack): First, one of the two fold lines adjacent to the angle α _G2 is not perpendicular to the edge of the composite material 1', but is inclined at an angle βz to a perpendicular S _2. Secondly, the front edge V, which is also adjacent to the angle α _G2 , is not straight but curved in the direction of the front surface 14, with the front edge V (or a tangent that touches the front edge V in the area of the corner or angle α _G2 ) by an angle γ relative to a horizontal line W (which runs parallel to the upper edge of the composite material 1') (α _G2 = 90° + β ₂ + γ). The angle β ₁ corresponds to the angle β ₂ ; both angles are preferably in the range between 2° and 6°. The two rear gable surface angles α _G1 can therefore have an angle of approximately 86°, for example. The angle γ is preferably in the range between 15° and 25°. The two front gable surface angles α _G2 can therefore have an angle of approximately 113°, for example. From the design described - in particular from the curved front edge V - it follows that the sum of the angles of the quadrangular gable area 6" is greater than 360° (2 ^∗ α _G1 + 2 ^∗ α _G2 > 360°).

Figure 2C shows a second area of the sheet-like composite material 1' Figure 2A in enlarged view. The already related Figures 1A to 2B The areas of the composite material 1' described are in Figure 2C provided with corresponding reference numbers. The second - in Figure 2C illustrated - area of the

Composite material 1` relates to the region of the third lateral fold line 18‴ which separates the side panels 16A, 16B from the rear panels 15A, 15B. The third lateral fold line 18‴ arranged between the side surfaces 16A, 16B and the rear surfaces 15A, 15B adjoining them has four sections I-IV: the first section 1 adjoins the bottom surfaces 5 and runs straight. The second section II is adjacent to the first section I and is curved (towards the rear surfaces 15A, 15B). As a result of the curvature, there is a maximum distance du between the third lateral fold line 18‴ and a perpendicular S, which can be in the range between 0.5 mm and 2.5 mm. The third section III is adjacent to the second section II and is curved (in the direction of the side surfaces 16A, 16B). As a result of the curvature, there is a maximum distance d _III between the third lateral fold line 18‴ and the vertical S, which can be in the range between 0.5 mm and 2.5 mm. The second section II and the third section III therefore have opposite curvatures or directions of curvature. The fourth section IV borders on the third section III and on the gable surfaces 6 and runs straight. The third lateral fold line 18‴ therefore runs straight in sections (in section I adjacent to the bottom surfaces 5 and in section IV adjacent to the gable surfaces 6) and curved in sections (in the two “middle” sections II, III).

Figure 3A shows a packing casing 9' according to the invention, which is known from Figure 2A shown sheet-like composite material 1 'is formed, in a front view. The already related Figures 1A to 2C described areas of the packing jacket 9 'are in Figure 3A provided with corresponding reference numbers. The packaging casing 9' was created from the composite material 1' in two steps: First, the composite material 1' is folded along the two pseudo-fold lines 7. Subsequently, the first rear surface 15A and the second rear surface 15B are connected to one another in the area of the sealing surface 4, in particular welded, as a result of which a (in Figure 3A hidden) longitudinal seam 10 arises. The packaging jacket 9 'thus has a peripheral structure closed in the circumferential direction with an opening in the area of the bottom surfaces 5 and with an opening in the area of the gable surfaces 6. In The front view shows the front surface 14, the two relief surfaces 17A, 17B and (in part) the two side surfaces 16A, 16B. The rear faces 15A, 15B are on the back of the packing skirt 9' and therefore in Figure 3A concealed.

In Figure 3B the packing casing 9' is off Figure 3A shown in a rear view. The already related Figures 1A to 3A described areas of the packing jacket 9 'are in Figure 3A provided with corresponding reference numbers. In the rear view, the two rear surfaces 15A, 15B are visible, which are connected to one another by the longitudinal seam 10 and which are delimited on both sides by the third lateral fold lines 18‴. In addition, the two side surfaces 16A, 16B are (partially) recognizable. The front surface 14 and the two relief surfaces 17A, 17B are on the front side of the packing shell 9' and therefore in Figure 3B concealed.

Figure 4A shows a pack 20 according to the invention, which is from 3 shown packing jacket 9 'is formed, in perspective view. The already related Figures 1A to 3B described areas of the pack 20 are in Figure 4A provided with corresponding reference numbers. In Figure 4A It is particularly easy to see that the relief area 17A (as well as the relief area 17B, not shown) in the area of the bottom is on the front of the pack 20, while the relief area 17A in the area of the gable is on the left-hand side of the pack 20 (the not-shown Accordingly, relief area 17B is assigned to the right-hand side of pack 20 in the area of the gable. The relief surfaces 17A, 17B thus "wind" from the front of the pack 20 around a (notional) edge of the pack 20 towards one side of the pack. The relief surfaces 17A, 17B thus form a transition from the front of the pack 20 (where they abut the front surface 14) to the two sides of the pack 20 (where they abut the two side surfaces 16A, 16B). In Figure 4A it can also be seen that the pack 20 has a sloping gable ("sloping gable") on which a screw cap 21 is arranged.

Also recognizable is the trapezoidal design of the gable, which is achieved by the fact that the square gable surfaces 6" have angles deviating from 90° (in Figure 4A the two small gable surface angles α _G1 adjoining the rear surfaces 15A, 15B have an angle of <90° and the two large gable surface angles α _G2 adjoining the front surface 14 have an angle of >90°. Furthermore, in Figure 4A clearly recognizable that both the first lateral fold lines 18' and the second lateral fold lines 18'' are curved, as are the third lateral fold lines 18‴.

Figure 4B shows the pack 20 out Figure 4A in a front view. The already related Figures 1A to 4A described areas of the pack 20 are in Figure 4B provided with corresponding reference numbers. In Figure 4B the trapezoidal design of the gable is particularly recognizable. In addition, the curved course of the first lateral fold lines 18' and the second lateral fold lines 18'' are clearly visible.

Figure 4C shows the pack 20 out Figure 4A in a rear view. The already related Figures 1A to 4B described areas of the pack 20 are in Figure 4C provided with corresponding reference numbers. In Figure 4C the composition of the rear of the pack 20 from the two rear surfaces 15A, 15B is particularly clearly visible. In addition, the curved course of the third lateral fold lines 18‴ is clearly visible.

Figure 4D finally shows the pack 20 Figure 4A in a side view. The already related Figures 1A to 4C described areas of the pack 20 are in Figure 4D provided with corresponding reference numbers. In Figure 4D the composition of the left-hand side of the pack 20 from the first side surface 16A and part of the first relief surface 17A can be seen particularly well. The (folded back) mock fold line 7 also runs through the first side surface 16A. For the in Figure 4D The same applies to the opposite right-hand side of the pack 20 (not shown), since the two sides are identical (mirror-symmetrical) to one another are designed. In addition, Figure 4D clearly recognizable that the pack 20 in the upper area of its front (right in Figure 4D ) is convexly curved outwards and in the upper area of its back (on the left in Figure 4D ) is concave inward.

Reference list:

1, 1':

Flat composite material

2:

fold line

3, 3A, 3B:

lateral surface

4:

sealing surface

5, 5', 5":

floor space

6, 6', 6":

gable area

7:

mock fold line

8th:

triangular area

9, 9':

packing jacket

10:

longitudinal seam

11:

pack

12:

fin seam

13:

Ear

14:

front face

15A, 15B:

first and second rear surface

16A, 16B:

first and second side surface

17A, 17B:

first and second relief surface

18', 18", 18‴:

mantle fold line

19:

weakened zone

20:

pack

21:

screw cap

αB:

Bottom surface angle (of the fold lines in the bottom area)

αG1, αG2:

Gable angle (of the fold lines in the gable area)

β1, β2:

Angle of inclination (relative to the perpendicular S ₁ , S ₂ )

y:

Angle of inclination (versus horizontal W)

dII, dIII:

Distance (between third jacket fold line 18‴ and vertical S)

EA:

corner axis

E5:

corner point (of floor surface 5)

E6:

corner point (of the gable area 6)

Q:

main fiber direction

L:

long edge

S, S1, S2:

vertical

SB:

Point of contact (of the triangular surfaces 8 of the bottom surface 5)

SG:

Point of contact (of the triangular surfaces 8 of the gable surface 6)

V:

Front edge (of square gable area 6")

W:

horizontal

I, II, III, IV:

Sections (of the third sheath fold line 18‴)

Claims (25)

1. Flat-shaped composite material (1') for manufacturing a package (20), comprising:

   - a polymer outer layer,

   - a polymer inner layer,

   - a fibrous support layer, which is arranged between the polymer outer layer and the polymer inner layer,

   - wherein the flat-shaped composite material (1') has a plurality of fold lines, which are arranged and designed such that a closed package (20) can be manufactured by folding the flat-shaped composite material (1') along the fold lines and by connecting seam surfaces of the flat-shaped composite material (1'),

   - a sleeve surface (3), wherein the sleeve surface (3) comprises a front surface (14), a first side surface (16A), a second side surface (16B), a first rear surface (15A) and a second rear surface (15B),

   - Base surfaces (5), wherein the base surfaces (5) comprise triangular base surfaces (5') and quadrangular base surfaces (5"), and

   - Gable surfaces (6), wherein the gable surfaces (6) comprise triangular gable surfaces (6') and quadrangular gable surfaces (6"),

   - wherein the base surfaces (5) and the gable surfaces (6) are arranged on opposite sides of the sleeve surface (3),

   characterised by a third sleeve fold line (18‴), which has a plurality of sections (I, II, III, IV), which each adjoin a side surface (16A, 16B) and a rear surface (15A, 15B), and of which at least one section (II, III) is curved and of which at least one section (I, IV) is straight.
2. Flat-shaped composite material (1') according to claim 1, characterised in that the section (I) of the third sleeve fold line (18"') adjoining the base surfaces (5) and the section (IV) of the third sleeve fold line (18"') adjoining the gable surfaces (6) are straight.
3. Flat-shaped composite material (1') according to claim 1 or claim 2, characterised in that at least two sections (II, III) of the third sleeve fold line (18‴) have opposite curvature directions.
4. Flat-shaped composite material (1') according to any one of claims 1 to 3, characterised by two secondary fold lines (7) running parallel to one another through the sleeve surface (3).
5. Flat-shaped composite material (1') according to any one of claims 1 to 4, characterised in that the sleeve surface (3) has at least one stress-relief surface (17A, 17B), which is arranged between the front surface (14) and one of the two side surfaces (16A, 16B).
6. Flat-shaped composite material (1') according to any one of claims 1 to 5, characterised in that at least one stress-relief surface (17A, 17B) adjoins a quadrangular base surface (5") in the region of the base surfaces (5) and adjoins a triangular gable surface (6') in the region of the gable surfaces (6).
7. Flat-shaped composite material (1') according to any one of claims 1 to 6, characterised in that a first sleeve fold line (18'), which is preferably curved at least in sections, is provided between at least one stress-relief surface (17A, 17B) and the adjoining front surface (14).
8. Flat-shaped composite material (1') according to any one of claims 1 to 7, characterised in that a second sleeve fold line (18"), which is preferably curved at least in sections, is provided between at least one stress-relief surface (17A, 17B) and the adjoining side surface (16A, 16B).
9. Flat-shaped composite material (1') according to any one of claims 1 to 8, characterised by at least one quadrangular gable surface (6") with two small gable surface angles (α_G1), which are smaller than 90°, with two large gable surface angles (α_G2), which are greater than 90°, and with an angle sum, which is greater than 360°.
10. Flat-shaped composite material (1') according to any one of claims 1 to 9, characterised in that at least one of the quadrangular gable surfaces (6") is approximately trapezoidal.
11. Flat-shaped composite material (1') according to any one of claims 1 to 10, characterised in that the quadrangular gable surface (6") has a front edge (V) which adjoins the front surface (14) and which is curved.
12. Flat-shaped composite material (1') according to any one of claims 1 to 11, characterised in that the fibrous support layer of the composite material (1') has a main fibre direction (F), which runs approximately at right angles to a longitudinal edge (L) of the composite material (1') running from the base surfaces (5) to the gable surfaces (6).
13. Package sleeve (9') made of a composite material for manufacturing a package (20), comprising:

    - a sleeve surface (3), wherein the sleeve surface (3) comprises a front surface (14), a first side surface (16A), a second side surface (16B), a first rear surface (15A) and a second rear surface (15B),

    - Base surfaces (5), wherein the base surfaces (5) comprise triangular base surfaces (5') and quadrangular base surfaces (5"),

    - Gable surfaces (6), wherein the gable surfaces (6) comprise triangular gable surfaces (6') and quadrangular gable surfaces (6"),

    - two secondary fold lines (7), which run parallel to one another through the sleeve surface (3), and

    - a longitudinal seam (10), which connects two edge regions of the composite material (1') to form a circumferential package sleeve (9'), which is open both in the region of the base surfaces (5) and in the region of the gable surfaces (6),

    - wherein the base surfaces (5) and the gable surfaces (6) are arranged on opposite sides of the sleeve surface (3), and

    - wherein the package sleeve (9') is folded along both secondary fold lines (7), characterised by a third sleeve fold line (18‴), which has a plurality of sections (I, II, III, IV), which each adjoin a side surface (16A, 16B) and a rear surface (15A, 15B), and of which at least one section (II, III) is curved and of which at least one section (I, IV) is straight.
14. Package sleeve (9') according to claim 13, characterised in that the package sleeve (9') is manufactured from a flat-shaped composite material (1') according to any one of claims 1 to 12.
15. Package sleeve (9') according to claim 13 or claim 14, characterised in that the composite material has at least one layer of paper or cardboard which is covered on the edge of the longitudinal seam (10) running within the package sleeve (9').
16. Package sleeve (9') according to claim 15, characterised in that the layer of paper or cardboard is covered by a sealing strip and/or by turning over the composite material in the region of the longitudinal seam (10).
17. Package sleeve (9') according to any one of claims 13 to 16, characterised in that the composite material is peeled in the region of the longitudinal seam (10).
18. Package (20) made of a composite material,

    - wherein the package (20) is manufactured from a flat-shaped composite material (1') according to the preamble of claim 1, or wherein the package (20) is manufactured from a package sleeve (9') according to the preamble of claim 13, and

    - wherein the package (20) is sealed in the region of the base surfaces (5) and in the region of the gable surfaces (6),

    characterised by a third sleeve fold line (18‴), which has a plurality of sections (I, II, III, IV), which each adjoin a side surface (16A, 16B) and a rear surface (15A, 15B), and of which at least one section (II, III) is curved and of which at least one section (I, IV) is straight.
19. Package (20) according to claim 18, characterised in that the section (I) of the third sleeve fold line (18"') adjoining the base surfaces (5) and the section (IV) of the third sleeve fold line (18‴) adjoining the gable surfaces (6) are straight.
20. Package (20) according to claim 18 or claim 19, characterised in that at least two sections (II, III) of the third sleeve fold line (18‴) have opposite curvature directions.
21. Package (20) according to any one of claims 18 to 20, characterised in that the package (20) has a fin seam (12) in the region of the gable, which is turned over in the direction of the front surface (14).
22. Package (20) according to any one of claims 18 to 21, characterised in that the package (20) has a gable which is approximately trapezoidal.
23. Package (20) according to any one of claims 18 to 22, characterised in that the package (20) has an inclined gable.
24. Package (20) according to any one of claims 18 to 23, characterised in that the package (20) is convex in the region of the front surface (14) and/or is concave in the region of the rear surfaces (15A, 15B).
25. Package (20) according to any one of claims 18 to 24, characterised in that the package (20) has a stress-relief surface (17A, 17B), which lies in a plane in sections with the front surface (14) and which lies in a plane in sections with a side surface (16A, 16B).

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