Package sleeve, package and method for producing package

Abstract

The invention illustrates and describes a packaging sleeve (10 ', 10' ') made of a composite material for producing packages (15', 15 ''), comprising: a sleeve surface (17) having an inner partial region (17A) and two outer partial regions (17B); a longitudinal seam (11) connecting the two edges of the composite material to form a surrounding packaging sleeve (10 ', 10' '); and two auxiliary fold lines (18) extending through the sleeve surface (17) wherein the packaging sleeve is folded along the two auxiliary fold lines. In order to be able to produce packages with complex geometries, the packaging sleeve (10 ', 10' ') does not comprise any further continuous fold line in the region of the inner partial region (17A) of the sleeve surface (17), except for the two auxiliary fold lines. The invention also illustrates and describes a package (15 ', 15' ') produced from the packaging sleeve (10', 10 '') and a method for producing a package (15 ', 15' ') from said packaging sleeve.

Description

[0001] This application is a divisional application of the invention patent application filed on April 5, 2017, with application number 201710218626.3 and invention name “Packaging sleeve, packaging and method for manufacturing packaging”. Technical Field

[0002] The present invention relates to a packaging sleeve made of a composite material for manufacturing a packaging piece, the packaging sleeve comprising: a sleeve surface having an inner local area and two outer local areas, a longitudinal seam connecting two edges of the composite material to form a surrounding packaging sleeve, and two auxiliary folding lines extending through the sleeve surface, wherein the packaging sleeve is folded along the two auxiliary folding lines.

[0003] The invention also relates to a package made of composite material, wherein the package is made from a packaging sleeve as described above and wherein the package is sealed in the region of the bottom surface and in the region of the gable surface.

[0004] The invention finally relates to a production method for producing a package from a packaging sleeve made of composite material. Background Art

[0005] The packages can be manufactured in different ways and from a very wide range of materials. A widely used possibility for the manufacture of packages consists in manufacturing a sleeve blank from a packaging material, from which a packaging sleeve is first formed by folding and other steps and finally the package is manufactured. This manufacturing method has the advantage, in particular, that the sleeve blank and the packaging sleeve are very flat and can therefore be stacked, thereby saving space. In this way, the sleeve blank or the packaging sleeve can be manufactured at a position different from the position where the packaging sleeve is folded and filled. Composite materials are usually used as materials, for example composite materials consisting of a plurality of thin layers of paper, cardboard, plastic or metal, in particular aluminum. The packages have been particularly widely used in the food industry.

[0006] The first manufacturing step usually includes making a packaging sleeve that is surrounded by folding and welding or bonding seams from a sleeve blank. The folding of the sleeve blank is usually carried out along a pre-punched folding line. Thus, the position of the folding line corresponds to the position of the edge of the package to be manufactured by the packaging sleeve. This has the following advantages: the sleeve blank and the packaging sleeve are folded only at the position that is folded in the finished package in any case. In the context of this application, a sleeve blank refers to such a sheet: it is made of a composite material product manufactured on a roller, cut into a certain size in the longitudinal direction and the transverse direction and has a defined profile ("flat composite material"). The packaging sleeve is then made of this sheet or flat composite material and is ready for sale, wherein, if it is possible to subsequently transport it from the manufacturing site to the use site and remove the outer packaging set for transportation, the packaging sleeve is ready to be processed in a filling machine for this purpose, and the packaging sleeve is considered ready for sale. This particularly means that the packaging sleeve does not require further mechanical intervention to ensure smooth processing of the packaging sleeve on the filling machine for this purpose. In contrast, during or after transport to the intended place of use, optionally, conditioning of the outside air and / or (additional) sterilization (e.g. the applicant's edge sterilization method) can also be performed on the finished packaging sleeve. On the other hand, intermediate steps (including forming and sealing) carried out during the production of the packaging sleeve from the sleeve blank still cannot be described as involving the packaging sleeve. A method for producing a package from a packaging sleeve is known, for example, from WO 2015 / 003852 A9 (in particular in Figures 1A to 1E The packages described herein have a rectangular cross-sectional profile and are generally cuboid in shape.

[0007] In addition to packages with rectangular cross-sectional profiles, packages with cross-sectional profiles with more than four corners are also known. For example, packages with octagonal cross-sectional profiles are known from EP 0 936 150 B1 or from US 6,042,527 A. The shape of this package is achieved by additional folding lines provided in the sleeve blank.

[0008] However, the disadvantage of folding the packaging sleeve along the subsequent package edge is that only packages with an angled cross-sectional profile can be produced. Furthermore, only packages can be produced whose cross-sectional profile remains the same in the vertical direction of the package. In contrast, alternative designs (e.g. rounded edges or free shapes instead of edges) are not possible.

[0009] From EP 0 027 350 A1, a packaging sleeve ("sleeve") and a package ("container") made therefrom are also known. The packaging sleeve described in this article allows the manufacture of such a package: the cross-sectional profile of the package changes in the vertical direction (rectangular cross-sectional profile on the gable and on the bottom, and an octagonal cross-sectional profile between the two). However, the package also has only an angled cross-sectional profile. In EP 0 027 350 A1, alternative designs such as rounded edges or free shapes are not described to replace edges. In addition, the packaging sleeve described in this article does not include composite materials, but includes cardboard or corrugated board. In order to fill the container with fluid, an inner bag made of plastic is suggested, so that the packaging sleeve itself does not need to be suitable for making liquid-tight packages.

[0010] Packaging sleeves and packages made therefrom are also described in GB 808,223A. Here, a long web of paperboard is first provided with folding lines and then covered with a plastic layer (Fig. 6). After forming a longitudinal seam (Fig. 7), the web is opened to form a tube with a rectangular cross section (Fig. 8). Then, the two side surfaces of the tube are folded inwardly, whereby the tube presents a flat shape (Fig. 9). Transversely oriented seams are formed at specified intervals, along which the tube can be folded and thus formed into a stack (Fig. 10). By separating the tube in the region of the transversely oriented seams, individual packaging sleeves are obtained, one end of which has been sealed by a transversely oriented seam. A disadvantage of this method is that when the packaging sleeve is separated from the tube, the packaging sleeve has been folded along six folding lines, four of which form the edges of the subsequent packages. Similarly, these packaging sleeves are therefore only suitable for making packages with a rectangular cross-sectional profile. Furthermore, the freedom of design of the gable surface or bottom surface formed in the region of the already sealed transverse seam is severely limited. In particular, a disadvantage is the high forming forces required to open the packaging sleeve and to form the packaging sleeve into an open-ended package (this intermediate state is also described as a "cup"). The high forming forces lead to very high loads on the already sealed seam, so that liquid-tightness and / or gas-tightness can no longer be provided with sufficient certainty.

[0011] Another packing sleeve and the package made by it are described in WO 97 / 32787A2. However, also in the case of this packing sleeve, a plurality of folding lines are arranged in the region of the sleeve surface, and some of the folding lines in the plurality of folding lines form the edge of the package made by it subsequently. Likewise, these packing sleeves are therefore only suitable for manufacturing packages with angled cross-sectional profiles (which remain the same in the vertical direction). Another disadvantage is that the packing sleeve is not only sealed by a longitudinal seam in the region of the rear side, but also sealed by a transverse seam in the region of the bottom. This results in a limited degree of freedom for bottom design. Here, also, it is particularly disadvantageous that the high forming force required is required in order to open the packing sleeve and form the packing sleeve into a package open at one end. The high forming force results in a very large load on the already sealed seam, so that liquid-tightness and / or airtightness are no longer provided with sufficient certainty. Also disadvantageous is the following restriction: there can be only one bottom variant (ear folded below the bottom), however, different bottom variants (ears pointing inward above the bottom) are impossible. Summary of the invention

[0012] Against this background, the present invention is based on solving the problem of the packaging sleeve described and elaborated in detail above, thereby making it possible to produce packagings of complex geometries, in particular liquid-tight packagings.

[0013] This problem is solved by a packaging sleeve according to an embodiment of the present invention, wherein the packaging sleeve is made of a composite material for manufacturing a packaging piece, and the packaging sleeve comprises: a sleeve surface having an inner local area and two outer local areas, a longitudinal seam, the longitudinal seam connecting two edges of the composite material to form a surrounding packaging sleeve, and two auxiliary folding lines, the two auxiliary folding lines extending through the sleeve surface, wherein the packaging sleeve is folded along the two auxiliary folding lines, and except for the two auxiliary folding lines, the packaging sleeve does not include any additional continuous folding lines in the portion of the inner local area of ​​the sleeve surface.

[0014] The packaging sleeve according to the present invention is composed of a composite material and is used to manufacture a package. Specifically, the packaging sleeve is composed of a composite material of multiple thin layers of paper, cardboard, plastic and / or metal (particularly aluminum). Preferably, the packaging sleeve is formed as a single piece. The packaging sleeve comprises a sleeve surface having an inner local area and two outer local areas, which replace the front surface, the rear surface and the two side surfaces in the packaging sleeve manufactured therefrom. The packaging sleeve also includes a longitudinal seam, which joins the two edges of the composite material to form a packaging sleeve surrounded by all sides. The longitudinal seam allows a continuous packaging sleeve closed in the circumferential direction to be manufactured from a flat (in most cases rectangular) blank. The longitudinal seam can be manufactured, for example, by bonding and / or welding. Because of the longitudinal seam, such a packaging sleeve is also referred to as a longitudinally sealed packaging sleeve. The packaging sleeve also includes two auxiliary folding lines, which extend through the sleeve surface. Similar to traditional folding lines, the purpose of the auxiliary folding lines is to facilitate folding the packaging sleeve. The auxiliary folding lines can be formed by a material weak part. Since the package is assumed to be liquid-tight, the material weaknesses used are not perforations but so-called "creases". Creases are linear material displacements which are impressed into the composite material by a punching tool. The packaging sleeve is folded along two auxiliary folding lines. The sleeve surface is divided by the auxiliary folding lines into an inner partial area and two outer partial areas. The inner partial area is located between the two auxiliary folding lines, and the outer partial areas are placed close to and outside the two auxiliary folding lines. The inner partial area of ​​the sleeve surface forms the front side of the packaging sleeve, and the two outer partial areas of the sleeve surface form the back side which together form the packaging sleeve.

[0015] According to the invention, the packaging sleeve does not include any additional continuous folding lines in the region of the inner local area of ​​the sleeve surface, except for the two auxiliary folding lines. In other words, the packaging sleeve should not include any additional continuous folding lines in the region between the two auxiliary folding lines. Preferably, the packaging sleeve does not include any additional continuous folding lines in the entire region of the sleeve surface, except for the two auxiliary folding lines.

[0016] The present invention is based on the idea that the packaging sleeve is not folded along the folding line that forms the edge of the package made of the packaging sleeve. That is, the packaging sleeve is not folded along the folding line that separates the front surface, the rear surface and the two side surfaces from each other. Instead, the true folding line is omitted at least in the position of the inner local area of ​​the sleeve surface, but preferably in the position of the entire sleeve surface, and the packaging sleeve is only folded along the "auxiliary folding line", which does not form the edge of the package subsequently. The folding along the auxiliary folding line therefore only occurs in the case of the packaging sleeve, but not in the case of the package manufactured therefrom. This allows the free design of the package geometry, and in particular allows the manufacture of packages with a non-rectangular packaging cross-section at least in a portion in the vertical direction. In particular, packages with curved surfaces without folded edges can be manufactured. A "continuous" folding line refers to a folding line that spans across the entire sleeve surface, such as a folding line from the bottom surface to the gable surface. Preferably, apart from the two auxiliary folding lines, the packaging sleeve does not comprise any further folding lines at least in the region of the inner partial area of ​​the sleeve surface and preferably in the entire region of the sleeve surface.

[0017] According to one embodiment of the packaging sleeve, the packaging sleeve is folded flatly into an angle of approximately 180° along two auxiliary folding lines, respectively. The packaging sleeve is folded flatly along the auxiliary folding lines so that the front part and the rear part of the packaging sleeve are placed one above the other. This folding at an angle of approximately 180° makes it possible to have a particularly flat packaging sleeve. This allows the packaging sleeve to be stacked in a space-saving manner, which is for example convenient for transportation. In this way, the packaging sleeve can be manufactured in a place different from the place where the filling and manufacturing of the packages are carried out. Preferably, the packaging sleeve is folded outwards along the two auxiliary folding lines.

[0018] According to another embodiment of the packaging sleeve, the two auxiliary folding lines extend parallel to each other. The two auxiliary folding lines are straight and preferably extend parallel to each other. This parallel arrangement has the advantage that the auxiliary folding lines can be stamped into the composite material particularly simply. Another advantage of the parallel arrangement of the auxiliary folding lines is that the packaging sleeve can be manufactured from a rectangular sleeve blank and does not require complex geometries (e.g., a trapezoidal sleeve blank).

[0019] Another embodiment of the packaging sleeve is characterized by the bottom surface and the gable surface being arranged on opposite sides of the sleeve surface. Preferably, in an upright package, the gable surface is arranged above the sleeve surface and the bottom surface is arranged below the sleeve surface.

[0020] With regard to this embodiment of the packaging sleeve, it is also suggested that the bottom surface and the gable surface each comprise two rectangular surfaces and six triangular surfaces. Preferably, the rectangular surfaces and the triangular surfaces are also surrounded or defined by fold lines. The rectangular surfaces are used for the purpose of folding the bottom and gable of the packaging. The triangular surfaces are used to fold the excess composite material into protruding "ears" which are then placed against the packaging.

[0021] In this regard, it is also suggested that the auxiliary folding line extends through the contact points of three adjacent triangular surfaces of the bottom surface, and extends through the contact points of three adjacent triangular surfaces of the gable surface. The arrangement of this auxiliary folding line has the advantage that the auxiliary folding line extends through the bottom surface and the gable surface at the point where these surfaces need to be folded in any case, for example to form an "ear". The folding along the auxiliary folding line of the packaging sleeve has therefore resulted in the "pre-folding" of the folding line extending centrally through the "ear". Another advantage of the central arrangement of the auxiliary folding line is that the auxiliary folding line will be used to limit the scope of the marginal area of ​​the design package as small as possible. It can be the case that two of the triangular surfaces of the bottom surface and / or the gable surface have approximately the same surface area. Alternatively, it can be the case that all three triangular surfaces of the bottom surface and / or the gable surface have different surface areas.

[0022] According to another embodiment of the packaging sleeve, the length of the gable surface on the rear side of the packaging sleeve is less than the length of the gable surface on the front side of the packaging sleeve. This design results in the front surface of the package having a height less than the rear surface of the package. Therefore, the package has an upper side that slopes downward.

[0023] According to another embodiment of the packaging sleeve, the auxiliary folding lines are punched out from the inside to the outside of the packaging sleeve and / or the auxiliary folding lines are punched out from the outside to the inside of the packaging sleeve. Depending on the position of the folding lines and the folding direction, a change in the punching direction can lead to better folding results. Moreover, in this way, outwardly facing lines and raised lines (not intended for folding) can be formed at the same time or in the same manufacturing step as the auxiliary folding lines, for example to allow the package to be better gripped and more firmly held. A combination of two punching directions can be used for one packaging sleeve.

[0024] In another embodiment of the packaging sleeve, it is suggested that the weight of the composite material of the packaging sleeve is in the range between 150 g / m2 and 400 g / m2, in particular in the range between 200 g / m2 and 250 g / m2. Gram weights or weights in this range have been shown to be a good compromise between low cost and light weight (the thinnest possible composite material) and sufficient mechanical properties (the thickest possible composite material).

[0025] According to another embodiment of the packaging sleeve, the composite material comprises at least one paper or paperboard layer, which is covered on the edge of the longitudinal seam extending inside the packaging sleeve. The covering of the paper or paperboard layer has the purpose of preventing contact between the contents of the package and this layer. This serves on the one hand to prevent liquids from leaking through the non-liquid-tight paper or paperboard layer and, on the other hand, to protect the contents of the package from contaminants that pass through the paper or paperboard layer (e.g. pulp fibers).

[0026] With regard to this embodiment, it is also suggested that the paper or paperboard layer is covered by a sealing strip and / or that the composite material in the region of the longitudinal seam is turned over and covered. One possibility for achieving the covering comprises attaching 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 bonded or fused to the layer. Another possibility for covering comprises turning over or folding the composite material in the region of the longitudinal seam. In this way, not all layers, but only the innermost layer of the composite material now appears on the edge of the longitudinal seam extending in the packaging sleeve. However, the innermost layer must be made of a material suitable for contact with the contents of the package in each case.

[0027] In another embodiment of the packaging sleeve, the composite material is stripped in the region of the longitudinal seam. A "stripped" composite material is understood to mean a composite material that has fewer layers in the stripped region than in other regions. In particular, in regions where a plurality of material layers overlap, stripping brings the advantage of a less noticeable increase in thickness. The use of a stripped composite material is therefore particularly advantageous if the composite material is, for example, turned over or folded in the region of the longitudinal seam.

[0028] According to another embodiment, the packaging sleeve can be provided with a material weakness, in particular a coating hole, in one of the gable surfaces for fixing the pouring element. The material weakness is used to facilitate the subsequent attachment of the pouring element. For this purpose, for example, a hole is first punched through the composite material, which is then coated. For example, the coating is performed by a plastic foil and serves to seal the package until the pouring element is applied.

[0029] According to another embodiment of the packing sleeve, the packing sleeve is open in the region of the bottom surface and in the region of the gable surface. In other words, the packing sleeve has two openings, one opening is arranged in the region of the bottom surface, and the other opening is arranged in the region of the gable surface. Two opposite openings make it particularly easy for the packing sleeve to open, forming the shape of a tube or the shape of a sleeve. An advantage of the packing sleeve open at both ends (for example compared with WO 97 / 32787A2) is the variable design possibility of the bottom. In particular, the orientation of the "ear" can be freely selected. For example, a bottom variant can provide: an ear folded below the rectangular surface of the bottom and fixed in place there. In contrast, another bottom variant can have an inwardly pointing ear, which is arranged above the rectangular surface of the bottom that is subsequently folded.

[0030] The problem described above is also solved by a package made of composite material, wherein the package is made of a packaging sleeve according to the above embodiment, wherein the package is sealed in the area of ​​the bottom surface and in the area of ​​the gable surface. The package is characterized in that the package does not include any continuous straight folding edges in the area of ​​the inner partial area of ​​the sleeve surface. Preferably, the package does not include any further continuous folding lines in the entire area of ​​the sleeve surface, except for two auxiliary folding lines.

[0031] Because this package is made by one of the packaging sleeves described above, many characteristics and advantages of the packaging sleeve are also found in the package. A special advantage is that the package does not have an angled folding edge at least in the position of the inner local area of ​​its sleeve surface, but preferably in the position of its entire sleeve surface, although the package is made by a packaging sleeve folded in two positions. This is achieved due to the following reasons: during the manufacture of the package, the packaging sleeve is "folded back" along two auxiliary folding lines, so that the local areas of the sleeve surface adjacent to the auxiliary folding lines are continuously merged with each other again. Therefore, the auxiliary folding lines do not form the edges of the package, but are located in the sleeve surface of the package almost invisibly. Instead of straight, angled folding edges, a package with a single formed, for example curved sleeve surface is obtained. In particular, it can be the case that the package does not include a folding edge at all at least in the position of the inner local area of ​​its sleeve surface, but preferably in the position of the entire sleeve surface. Preferably, the package has a volume in the range between 50 ml and 4000 ml, in particular in the range between 250 ml and 350 ml. Preferably, the package is formed as a single piece. In particular, the part of the package made of composite material is formed as a single piece in any case. This part of the package can be supplemented with further elements, for example with a pouring element (for example a plastic flip-top or screw cap) or a drinking aid (for example a straw).

[0032] According to one embodiment of the package, the partial areas of the sleeve surface adjoining the auxiliary folding lines are arranged relative to each other in an angular range between 160° and 200°, in particular in an angular range between 170° and 190°. A particular advantage of this embodiment is that the package does not have any folded edges and therefore does not have rectangular edges on its sides. This can be achieved because, during the production of the package, the packaging sleeve is "folded back" along the two auxiliary folding lines, so that the partial areas of the sleeve surface adjoining the auxiliary folding lines are arranged in approximately the same plane.

[0033] Another embodiment of the package is characterized by ears placed against the bottom surface in the lower area of ​​the package. Alternatively or in addition, the package is characterized by ears placed against the sleeve surface in the upper area of ​​the package. In the lower area of ​​the package, the ears can be placed against the bottom surface in different ways: in one bottom variant, the ears are folded below the rectangular surface of the bottom and fixed in place there. In contrast, another bottom variant can have ears pointing inwards, which are arranged above the rectangular surface of the bottom that is subsequently folded. The first variant has the advantage that the ears are firmly pressed against the package by the net weight of the filled package, however, the second variant provides a particularly smooth bottom surface. The arrangement of the upper ears on the sleeve surface has the advantage that the pouring element can be arranged on the upper side of the package.

[0034] The problem described above is also solved by a method for producing a package from a packaging sleeve made of a composite material. The method comprises the following steps: a) providing a packaging sleeve as described in the above embodiment, b) folding back the sleeve surface of the packaging sleeve along two auxiliary folding lines. The method can also be supplemented by the following steps performed after step a) and after step b): c) sealing the packaging sleeve in the region of the bottom surface; d) filling the package; e) sealing the packaging sleeve in the region of the gable surface.

[0035] As already described above, the method is also based on the idea of ​​producing a package from a packaging sleeve whose auxiliary folded edges do not form the edge of the package produced therefrom. This is possible because the packaging sleeve folded along the auxiliary folding line is "folded back", whereby the folding along the auxiliary folding line is reversed. The auxiliary folding line provided in the packaging sleeve thus does not form the edge of the package. This allows the production of packages with complex geometries.

[0036] Finally, according to a further embodiment of the method, after the folding back, the partial areas of the sleeve surface adjoining the auxiliary folding line are again placed relative to each other within an angular range of between 160° and 200°, in particular within an angular range of between 170° and 190°. The partial areas of the sleeve surface should therefore be folded back very far along the auxiliary folding line so that the sleeve surface has a virtual continuous transition between the partial areas of the sleeve surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The invention is explained in more detail below by referring only to the accompanying drawings which show preferred exemplary embodiments. In the drawings:

[0038] Figure 1A A sleeve blank known from the prior art for folding into a packaging sleeve is shown;

[0039] Figure 1B A packaging sleeve known from the prior art is shown, which consists of Figure 1A The sleeve blank shown in is formed and in a flat folded state;

[0040] Figure 1C Shown from Figure 1B A packaging sleeve in an unfolded state;

[0041] Figure 1D Shown from Figure 1C A packaging sleeve having a pre-folded bottom surface and a gable surface;

[0042] Figure 1E A packaging known from the prior art is shown, which consists of Figure 1A The sleeve blank shown in is formed after welding;

[0043] Figure 1F Shown from Figure 1E A package having folded-in ears;

[0044] Figure 2A A sleeve blank for manufacturing a packaging sleeve according to a first embodiment of the present invention is shown;

[0045] Figure 2B A front view of a packaging sleeve according to a first embodiment of the present invention is shown, wherein the packaging sleeve is composed of Figure 2A The sleeve blank shown is formed;

[0046] Figure 2C Shown from Figure 2B A rear view of the packaging sleeve;

[0047] Figure 2D Shown from Figure 2B and Figure 2CA packaging sleeve in an unfolded state;

[0048] Figure 2E Shown from Figure 2D A packaging sleeve having a pre-folded bottom surface and a gable surface;

[0049] Figure 2E 'show from Figure 2D A packaging sleeve having a pre-folded bottom surface and a gable surface;

[0050] Figure 2F A first embodiment of a package according to the invention is shown, which consists of Figure 2B The packaging sleeve shown in is formed after welding;

[0051] Figure 2F ' shows a first embodiment of the package according to the present invention, which consists of Figure 2B The packaging sleeve shown in is formed after welding;

[0052] Figure 2G Shown from Figure 2F 'A package with folded ears;

[0053] Figure 2G 'show from Figure 2F 'A package with a tucked-in fin seam;

[0054] Figure 3A A sleeve blank for manufacturing a packaging sleeve according to a second embodiment of the present invention is shown;

[0055] Figure 3B A front view of a packaging sleeve according to a second embodiment of the present invention is shown, which consists of Figure 3A The sleeve blank shown in is formed;

[0056] Figure 3C Shown from Figure 3B A rear view of the packaging sleeve;

[0057] Figure 3D Shown from Figure 3B and Figure 3C A packaging sleeve in an unfolded state;

[0058] Figure 3E Shown from Figure 3D A packaging sleeve having a pre-folded bottom surface and a gable surface;

[0059] Figure 3E 'show from Figure 3D A packaging sleeve having a pre-folded bottom surface and a gable surface;

[0060] Figure 3F A second embodiment of the package according to the invention is shown, which consists of Figure 3B The packaging sleeve shown in is formed after welding;

[0061] Figure 3F ' shows a second embodiment of the package according to the present invention, which consists of Figure 3B The packaging sleeve shown in is formed after welding;

[0062] Figure 3G Shown from Figure 3F A package having folded-in ears; and

[0063] Figure 3G 'show from Figure 3F ' packaging with a tucked-in fin seam. DETAILED DESCRIPTION

[0064] Figure 1A A sleeve blank 1 known from the prior art is shown, from which a packaging sleeve can be formed. The sleeve blank 1 can comprise a plurality of layers of different materials, such as paper, cardboard, plastic or metal, in particular aluminium. The sleeve blank 1 has a plurality of folding lines 2, the purpose of which is to facilitate the folding of the sleeve blank 1 and to divide the sleeve blank 1 into a plurality of surfaces. The sleeve blank 1 can be divided into a first side surface 3, a second side surface 4, a front surface 5, a rear surface 6, a sealing surface 7, a bottom surface 8 and a gable surface 9. A packaging sleeve can be formed from the sleeve blank 1, wherein the sleeve blank 1 is folded such that the sealing surface 7 can be connected, in particular welded, to the front surface 5.

[0065] Figure 1B A packaging sleeve 10 known from the prior art is shown in a folded flat state. Figure 1A The area of ​​the packaging sleeve described in Figure 1B The packaging sleeve 10 is also provided with corresponding reference numerals. Figure 1A The sleeve blank 1 shown in FIG. 1 is formed. For this purpose, the sleeve blank 1 is folded so that the sealing surface 7 and the front surface 5 are arranged overlapping, so that the two surfaces can be surface-welded together. A longitudinal seam 11 is thereby formed. Figure 1B The packaging sleeve 10 is shown in a flatly folded state. In this state, the side surface 4 (at Figure 1B The side surface 3 is located below the front surface 5, while the other side surface 3 is located below the rear surface 6 (in Figure 1BIn the flat folded state, a plurality of packaging sleeves 10 can be stacked in a particularly space-saving manner. Therefore, the packaging sleeves 10 are usually stacked at the manufacturing site and transported in a stacked form to the site for filling. Only at the filling site are the packaging sleeves 10 removed and unfolded so that they can be filled with the contents, for example, with food. The filling can be carried out under sterile conditions.

[0066] Figure 1C Shown from Figure 1B The packaging sleeve 10 in the unfolded state has been combined Figure 1A or Figure 1B The areas of the packaging sleeve 10 described may also be provided with corresponding reference numerals here. The expanded state refers to such a configuration: in each case, an angle of approximately 90° is formed between two adjacent surfaces 3, 4, 5, 6, so that, depending on the shape of these surfaces, the packaging sleeve 10 presents a square cross section or a rectangular cross section. Accordingly, the opposite side surfaces 3, 4 are arranged parallel to each other. The same applies to the front surface 5 and the rear surface 6.

[0067] Figure 1D Shown from Figure 1C The packaging sleeve 10 is in a pre-folded state, i.e., in a state in which the fold lines 2 in the region of the bottom surface 8 and in the region of the gable surface 9 have been pre-folded. Those regions of the bottom surface 8 and the gable surface 9 adjoining the front surface 5 and the rear surface 6 are also referred to as rectangular surfaces 12. During this pre-folding, the rectangular surfaces 12 are folded inwards and subsequently form the bottom or gable of the package. In contrast, those regions of the bottom surface 8 and the gable surface 9 adjoining the side surfaces 3, 4 are referred to as triangular surfaces 13. During this pre-folding, the triangular surfaces 13 are folded outwards, forming protruding areas of excess material, which are also referred to as "ears" 14 and are folded and fixed to the package in a subsequent manufacturing step, for example by a gluing process.

[0068] Figure 1E A packaging 15 known from the prior art is shown, which consists of Figure 1A . The package 15 is shown after welding, ie in a filled and sealed state. After sealing, a fin seam 16 is formed in the region of the bottom surface 8 and in the region of the gable surface 9. Figure 1E In the embodiment, the ears 14 and the fin seams 16 are protruding. The ears 14 and the fin seams 16 are folded flat in a subsequent manufacturing step, for example by a welding process, in particular a welding process including activation and pressing.

[0069] Figure 1F Shown from Figure 1E A package 15 with folded-in ears 14 is provided. Furthermore, the fin seam 16 is also folded flat against the package 15. The upper ears 14 arranged in the region of the gable surface 9 are folded over and fixed flat against the two side surfaces 3, 4. Preferably, the upper ears 14 are glued or welded to the two side surfaces 3, 4. The lower ears 14 arranged in the region of the bottom surface 8 are also folded over, but fixed flat against the lower side of the package 15, which is formed by the two rectangular surfaces 12 of the bottom surface 8. Preferably, likewise, the lower ears 14 are glued or welded to the package 15, in particular to the rectangular surfaces 12.

[0070] Figure 2A A sleeve blank 1 ' for producing a packaging sleeve according to a first embodiment of the present invention is shown. Figures 1A to 1F The area of ​​the sleeve blank described is Figure 2A The corresponding reference numerals are provided in FIG. Figure 1A The sleeve blank 1 of the present invention, the bottom surface 8 and the gable surface 9 in the sleeve blank 1' remain unchanged. However, one difference is that the two side surfaces 3, 4, the front surface 5 and the rear surface 6 are combined to form a sleeve surface 17. In addition to the sealing surface 7, the sleeve surface 17 extends over the entire width of the sleeve blank 1'. Another difference is that the sleeve blank 1' includes two auxiliary folding lines 18 in the area of ​​the sleeve surface 17. The two auxiliary folding lines 18 are straight and extend parallel to each other. Moreover, the auxiliary folding line 18 extends through the contact point SB of the three adjacent triangular surfaces 13 of the bottom surface 8, and extends through the contact point SG of the three adjacent triangular surfaces 13 of the gable surface 9. The sleeve surface 17 is divided into an inner local area 17A and two outer local areas 17B by the auxiliary folding lines 18. The inner local area 17A is located between the two auxiliary folding lines 18, and the outer local area 17B is placed close to the two auxiliary folding lines 18 and outside the two auxiliary folding lines 18.

[0071] The bottom surface 8 forms four inflection points E8, and the gable surface 9 forms four inflection points E9. The inflection points E8, E9 represent the inflection points of the package to be manufactured from the sleeve blank 1'. Each inflection point E8 of the bottom surface 8 is associated with a corresponding inflection point E9 of the gable surface 9, which in each case is an inflection point E9 arranged above the inflection point E8 when the package is erected. A corner axis EA extends through two associated inflection points E8, E9, which in a conventional cuboid package would correspond to a vertical package edge. The four corner axes EA are thus present in the package. Figure 2AIn the sleeve blank 1 ' shown in the figure, also in the packaging sleeve produced from this sleeve blank 1 ' and in the packaging piece produced from this packaging sleeve (for the sake of simplicity, only one corner axis EA is drawn in each case). No folding line is arranged between the inflection point E8 of the bottom surface 8 and the inflection point E9 of the gable surface 9 associated therewith, i.e. no folding line is arranged along the corner axis EA.

[0072] Figure 2B A front view of a packaging sleeve 10' according to a first embodiment of the present invention is shown. The packaging sleeve 10' consists of Figure 2A The sleeve blank 1' shown is formed. Figures 1A to 2A The area of ​​the packaging sleeve described in Figure 2B The packaging sleeve 10' is formed from the sleeve blank 1' in two steps: first, the sleeve blank 1' is folded along two auxiliary folding lines 18. Then, the two partial areas 17A, 17B of the sleeve surface 17 are connected to each other (in particular welded together) in the area of ​​the sealing surface 7, forming the longitudinal seam 11 (in the Figure 2B The packaging sleeve 1' thus has a circumferentially closed structure with an opening in the region of the base surface 8 and an opening in the region of the gable surface 9. In the front view, an inner partial region 17A of the sleeve surface 17 is visible, which is delimited on both sides by auxiliary folding lines 18. Another partial region 17B of the sleeve surface 17 is on the rear side of the packaging sleeve 10' and is therefore located on the rear side of the packaging sleeve 10'. Figure 2B Hidden in.

[0073] Figure 2C Shows Figure 2B A rear view of the packaging sleeve 10'. Figures 1A to 2B The area of ​​the packaging sleeve described in Figure 2C In the rear view, two outer partial areas 17B of the sleeve surface 17 are visible, which are joined to each other by the longitudinal seam 11 and are defined on both sides by the auxiliary folding lines 18. The inner partial area 17A of the sleeve surface 17 is on the front side of the packaging sleeve 10 ′ and is therefore on the Figure 2C Hidden in.

[0074] Figure 2D Shown from Figure 2B and Figure 2C The packaging sleeve 10' is in an unfolded state. Figures 1A to 2C The area of ​​the packaging sleeve described in Figure 2DThe corresponding reference numerals are provided in the figures. The unfolded state is achieved by folding back the packaging sleeve 10' along the auxiliary folding line 18 extending through the sleeve surface 17. The sleeve is folded back by approximately 180°. The folding back along the auxiliary folding line 18 has the result that two partial areas 17A, 17B of the sleeve surface 17 adjoining the auxiliary folding line 18 are no longer located one above the other, but are arranged in the same plane. In its flat state, the packaging sleeve 10' is therefore only folded along the auxiliary folding line 18 ( Figure 2B , Figure 2C ); in contrast, in the expanded state ( Figure 2D ), the packaging sleeve 10 ′ (like the package formed therefrom) is no longer folded along the auxiliary fold line 18. Therefore, it is designated as an “auxiliary” fold line 18.

[0075] Figure 2E Shown from Figure 2D The packaging sleeve 10' having a pre-folded bottom surface and a gable surface. Figures 1A to 2D The area of ​​the packaging sleeve described in Figure 2E The corresponding reference numerals are provided in the figure. The pre-folded state indicates (such as in Figure 1D ) a state in which the fold line 2 has been pre-folded in the region of the bottom surface 8 and in the region of the gable surface 9. During the pre-folding, the rectangular surface 12 is folded inwards and subsequently forms the bottom or gable of the package. During the pre-folding, the triangular surface 13 is folded outwards and forms a protruding area of ​​excess material (which is also called "ear" 14), and in a subsequent manufacturing step the triangular surface 13 is folded and fixed against the package, for example by means of a gluing process.

[0076] Figure 2E 'It also shows the Figure 2D ' has a pre-folded bottom surface and gable surface of the packaging sleeve 10 ', for which reason also the corresponding reference numerals are used here. Figure 2E The difference in comparison is that the triangular surface 13 is not folded outwardly but is folded inwardly.

[0077] Figure 2F A first embodiment of a package 15' according to the invention is shown, which consists of Figure 2B The packaging sleeve 10 'shown in FIG. is formed after welding. Figures 1A to 2E The area of ​​the package described is Figure 2F 1 and 2 are provided with corresponding reference numerals. 2 shows the package 15 ′ after welding, ie in the filled and sealed state. After sealing, a fin seam 16 is formed in the region of the bottom surface 8 and in the region of the gable surface 9. Figure 2FIn the embodiment, the ears 14 and the fin-shaped seams 16 protrude. In a subsequent manufacturing step, the ears 14 and the fin-shaped seams 16 are folded flat, for example by a bonding process.

[0078] Figure 2F 'A package 15' according to a first embodiment of the present invention is also shown, which consists of Figure 2B The packaging sleeve 10 ' shown in FIG. 1 is formed after welding. Therefore, corresponding reference numerals are used here as well. Figure 2F The difference in comparison is that the triangular surface 13 is not folded outwards before welding, but folded inwards. Therefore, the "ears" 14 do not protrude outwards, but protrude inwards. This results in a shorter fin seam 16.

[0079] Figure 2G The embodiment of the invention is shown with the ears 14 folded in. Figure 2F Package 15'. Already combined Figures 1A to 2F The area of ​​the package described is Figure 2G Corresponding reference numerals are provided in the figure. The fin seam 16 and the ear 14 are also folded against the packaging 15'. The upper ear 14 arranged in the area of ​​the gable surface 9 is folded over and placed flat against the sleeve surface 17. Preferably, the upper ear 14 is bonded or welded to the sleeve surface 17. The lower ear 14 arranged in the area of ​​the bottom surface 8 is folded over, but is fixed flat against the lower side of the packaging 15', which is formed by the two rectangular surfaces 12 of the bottom surface 8. Preferably, the lower ear 14 is also bonded or welded to the packaging 15', in particular to the rectangular surfaces 12. In Figure 2G The package 15 ′ shown does not comprise any folded edges in the region of the sleeve surface 17 , although the sleeve surface 17 is curved.

[0080] Figure 2G ' shows a fin seam 16 from the tucked-in Figure 2F ' of the package 15'. Here, corresponding reference numerals are therefore also used. The fin seam 16 is folded over and placed flat against the underside of the package 15', which is formed by the two rectangular surfaces 12B of the bottom surface 8. Preferably, the fin seam 16 is glued or welded to the package 15', in particular to the rectangular surfaces 12. Figure 2G The difference is the structure of the bottom of the package 15': Figure 2G In the embodiment, the ear 14 is arranged below the rectangular surface 12 and is therefore visible from the bottom; in contrast, Figure 2G ', the rectangular surface 12 is arranged below the ear 14 and is therefore visible from the bottom side.

[0081] Figure 3AA sleeve blank 1 ″ is shown for producing a packaging sleeve according to a second embodiment of the invention. Figure 3A The sleeve blank 1" corresponds largely to Figure 2A ', so that the corresponding figure marks are also used here. One difference lies in the shape of the gable surface 9: whereas the length L8 of the bottom surface 8 is constant over the entire length of the sleeve blank 1", the length of the gable surface 9 has different values. Adjacent to the outer local area 17B of the sleeve surface 17, the gable surface 9 has a reduced length L9min. In contrast, adjacent to the inner local area 17A of the sleeve surface 17, the gable surface 9 has an increased length L9max. This design means that the inner local area 17A has a smaller height than the outer local area 17B. Similarly, in the case of the sleeve blank 1", the sleeve blank 1" includes two auxiliary folding lines 18 in the area of ​​the sleeve surface 17. The two auxiliary folding lines 18 are straight and extend parallel to each other. Moreover, the auxiliary folding lines 18 extend through the contact points SB of three adjacent triangular surfaces 13 of the bottom surface 8, and through the contact points SG of three adjacent triangular surfaces 13 of the gable surface 9.

[0082] Figure 3B A front view of a packaging sleeve 10" according to a second embodiment of the present invention is shown. Figure 3A The sleeve blank 1" shown in FIG. Figure 3B The packaging sleeve 10" corresponds to a large extent to Figure 2B The packaging sleeve 10 ′ of FIG. 1 is a packaging sleeve 10 ′, so that corresponding reference numerals are used here as well. One difference is that the gable surface 9 has an increased length L9max in the region of its front partial region 17A adjoining the sleeve surface 17 .

[0083] Figure 3C Shown from Figure 3B A rear view of a packaging sleeve 10". Figure 3C The packaging sleeve 10" corresponds to a large extent to Figure 2C 1 ', so that corresponding reference numerals are used here as well. One difference is that the gable surface 9 has a reduced length L9min in its outer partial region 17B adjoining the sleeve surface 17.

[0084] Figure 3D Shows the expanded state from Figure 3B and Figure 3C Packaging sleeve 10". Figure 3D The packaging sleeve 10" corresponds to a large extent to Figure 2DThe packaging sleeve 10 ' in FIG. 1 is similar to the packaging sleeve 10 ' in FIG. 1 , whereby corresponding reference numerals are also used here. One difference is that the gable surface 9 has an increased length L9max in the portion where it adjoins the inner partial region 17A of the sleeve surface 17, and the gable surface 9 has a reduced length L9min in the portion where it adjoins the outer partial region 17B of the sleeve surface 17.

[0085] Figure 3E Shown is a pre-folded bottom surface and gable surface from Figure 3D Packaging sleeve 10". Figure 3E The packaging sleeve 10" corresponds to a large extent to Figure 2E The packaging sleeve 10 ' in FIG. 1 , whereby corresponding reference numerals are also used here. One difference is that the gable surface 9 has an increased length L9max in the part where it adjoins the inner partial area 17A of the sleeve surface 17, and the gable surface 9 has a reduced length L9min in the part where it adjoins the outer partial area 17B.

[0086] Figure 3E ' Also shown is a pre-folded bottom surface and gable surface from Figure 3D For this reason, corresponding reference numerals are also used here. Figure 3E The difference is that the triangular surface 13 is not folded outwards but inwards.

[0087] Figure 3F A second embodiment of a package 15" according to the invention is shown, the package 15" comprising Figure 3B The packaging sleeve 10 ″ shown in FIG. 1 is formed after welding. Figure 3F The package 15" corresponds to a large extent to Figure 2F 15 ', so that corresponding reference numerals are used here as well. One difference is that the gable surface 9 has an increased length L9max in its area adjacent to the inner partial area 17A of the sleeve surface 17, and the gable surface 9 has a reduced length L9min in its area adjacent to the outer partial area 17B of the sleeve surface 17. The increased length L9max of the gable surface 9 results in a large surface that can be used for the pouring element 19.

[0088] Figure 3F 'A second embodiment of a package 15" according to the invention is also shown, the package 15" consisting of Figure 3B The packaging sleeve 10" shown in FIG. is formed after welding. Here, corresponding reference numerals are also used. Figure 3FThe difference is that, before welding, the triangular surface 13 is not folded outwards, but inwards. Therefore, the "ear" 14 does not protrude outwards, but inwards. This results in a shorter fin seam 16.

[0089] at last, Figure 3G The ear portion 14 is shown with the ear portion 14 folded in. Figure 3F The packaging is 15". Figure 3G The package 15" corresponds to a large extent to Figure 2G ', so that the corresponding reference numerals are also used here. One difference is that the gable surface 9 has an increased length L9max in the area where it adjoins the inner partial area 17A of the sleeve surface 17, and the gable surface 9 has a reduced length L9min in the area where it adjoins the outer partial area 17B of the sleeve surface 17. The increased length L9max of the gable surface 9 results in a large surface that can be used for the pouring element 19. Due to the downwardly sloping upper side of the package 15", this package is also referred to as a "sloping gable top package".

[0090] at last, Figure 3G ' shows a fin seam 16 from the tucked-in Figure 3F ' of the package 15". Here, corresponding reference numerals are therefore also used. The fin seam 16 is folded over and placed flat against the lower side of the package 15", which is formed by the two rectangular surfaces 12 of the bottom surface 8. Preferably, the fin seam 16 is bonded or welded to the package 15", in particular to the rectangular surfaces 12. Figure 3G The difference is the structure of the bottom of the package 15": Figure 3G In the embodiment, the ear 14 is arranged below the rectangular surface 12 and is therefore visible from the bottom; in contrast, Figure 3G ', the rectangular surface 12 is arranged below the ear 14 and is therefore visible from the bottom side.

[0091] Reference numerals list

[0092] 1,1',1”: Sleeve blank

[0093] 2,2': Folding line

[0094] 3,4: Side surface

[0095] 5: Front surface

[0096] 6: Back surface

[0097] 7: Sealing surface

[0098] 8: Bottom surface

[0099] 9: Gable Surface

[0100] 10,10',10":Packaging sleeve

[0101] 11: Longitudinal seam

[0102] 12: Rectangular surface

[0103] 13: Triangular Surface

[0104] 14: Ears

[0105] 15,15',15":Packaging

[0106] 16: Fin seam

[0107] 17: Sleeve surface

[0108] 17A, 17B: Local area (of sleeve surface 17)

[0109] 18: Auxiliary folding lines

[0110] 19: Tipping element

[0111] EA: Angle axis

[0112] E8: Inflection point (of bottom surface 8)

[0113] E9: Inflection point (of gable surface 9)

[0114] SB: contact point (of the triangular surface 13 of the bottom surface 8)

[0115] SG: contact point (of the triangular surface 13 of the gable surface 9)

Claims

1. A packaging sleeve (10', 10") made of a composite material for manufacturing a packaging piece (15', 15"), the packaging sleeve comprising: a sleeve surface (17) having an inner partial region (17A) and two outer partial regions (17B), a longitudinal seam (11) connecting the two edges of the composite material to form a surrounding packaging sleeve (10', 10"), and two auxiliary folding lines (18) extending through the sleeve surface (17), Wherein, the packaging sleeve (10', 10") is folded along the two auxiliary folding lines (18), Characterized in that, apart from the two auxiliary folding lines (18), the packaging sleeve (10', 10") does not comprise any further continuous folding lines in the region of the inner partial area (17A) of the sleeve surface (17).

2. The packaging sleeve (10', 10") according to claim 1, characterized in that The packaging sleeve (10', 10") is folded flatly at an angle of approximately 180° along the two auxiliary folding lines (18).

3. The packaging sleeve (10', 10") according to claim 1 or 2, characterized in that: The two auxiliary folding lines (18) extend parallel to each other.

4. The packaging sleeve (10', 10") according to any one of claims 1 to 3, characterized in that A bottom surface (8) and a gable surface (9), the bottom surface (8) and the gable surface (9) being arranged on opposite sides of the sleeve surface (17).

5. The packaging sleeve (10', 10") according to claim 4, characterized in that The bottom surface (8) and the gable surface (9) each include two rectangular surfaces (12) and six triangular surfaces (13).

6. The packaging sleeve (10', 10") according to claim 5, characterized in that The auxiliary folding line (18) extends through the contact points (SB) of three adjacent triangular surfaces (13) of the bottom surface (8), and extends through the contact points (SG) of three adjacent triangular surfaces (13) of the gable surface (9).

7. The packaging sleeve (10") according to any one of claims 4 to 6, characterized in that The gable surface (9) on the rear side of the packaging sleeve (10") has a length (L9min) that is shorter than the length (L9max) of the gable surface (9) on the front side of the packaging sleeve (10").

8. The packaging sleeve (10', 10") according to any one of claims 1 to 7, characterized in that The auxiliary folding line (18) is punched out from the inside to the outside of the packaging sleeve (10', 10") and / or from the outside to the inside of the packaging sleeve (10', 10").

9. The packaging sleeve (10', 10") according to any one of claims 1 to 8, characterized in that The weight of the composite material of the packaging sleeve (10', 10") is in the range between 150 g / m2 and 400 g / m2, in particular in the range between 200 g / m2 and 250 g / m2.

10. The packaging sleeve (10', 10") according to any one of claims 1 to 9, characterized in that The composite material comprises at least one paper or paperboard layer which is covered on the edges of the longitudinal seam (11) extending inside the packaging sleeve (10', 10").

11. The packaging sleeve (10', 10") according to claim 10, characterized in that The paper or cardboard layer is covered by a sealing strip and / or by turning over the composite material in the region of the longitudinal seam (11).

12. The packaging sleeve (10', 10") according to any one of claims 1 to 11, characterized in that The composite material is peeled off in the region of the longitudinal seam (11).

13. The packaging sleeve (10', 10") according to any one of claims 1 to 12, characterized in that A material weakness, in particular a coated hole, in one of the gable surfaces (9) for fixing a pouring element (19).

14. The packaging sleeve (10', 10") according to any one of claims 1 to 13, characterized in that The packaging sleeve (10', 10") is open in the region of the base surface (8) and in the region of the gable surface (9).

15. A packaging element (15', 15") made of a composite material, in, The packaging (15', 15") is made of a packaging sleeve (10', 10") according to any one of claims 1 to 14, wherein the packaging (15', 15") is sealed in the region of the bottom surface (8) and in the region of the gable surface (9), Characterized in that the packaging (15', 15") does not comprise any continuous straight folded edge in the region of the inner partial area (17A) of the sleeve surface (17).

16. The package (15', 15") according to claim 15, characterized in that The partial areas (17A, 17B) of the sleeve surface (17) adjoining the auxiliary folding line (18) are arranged relative to each other in an angular range between 160° and 200°, in particular in an angular range between 170° and 190°.

17. The package (15', 15") according to claim 15 or 16, characterized in that Ears (14) placed against the bottom surface (8) in a lower region of the package (15', 15").

18. The package (15', 15") according to any one of claims 15 to 17, characterised in that Ears (14) placed against the sleeve surface (17) in the upper region of the package (15', 15").

19. A method for manufacturing a package (15', 15") from a packaging sleeve (10', 10") made of a composite material, characterized in that: The following steps are involved: a) providing a packaging sleeve (10', 10") according to any one of claims 1 to 14, b) folding back the sleeve surface (17) of the packaging sleeve (10', 10") along two auxiliary folding lines (18).

20. The method according to claim 19, characterized in that After folding back, the local areas (17A, 17B) of the packaging surface (17) adjacent to the auxiliary folding line (18) are again placed relative to each other in an angle range between 160° and 200°, in particular between 170° and 190°.

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