Packaging box with curved edges

Abstract

The invention relates to a packaging box (1) made of a composite material, comprising a packaging box base (B) having two front base corners (BV1, BV2) and two back base corners (BH1, BH2), a packaging box gable (G) having two front gable corners (GV1, GV2) and two back gable corners (GH1, GH2), and a packaging box base body (K) having a front face panel (F), a first side panel (S1), a second side panel (S2) and a back panel (R), wherein the packaging box base (B) and the packaging box gable (G) are arranged on opposite sides of the packaging box base body (K), and wherein the composite material comprises a polymer outer layer, a polymer inner layer and a fiber-containing support layer arranged between the polymer outer layer and the polymer inner layer. In order to manufacture packaging boxes having more complex geometries without impairing the rigidity of the packaging box, it is proposed to provide a third outer skin fold line (M3) having a plurality of sections (II, III) which adjoin the side panels (S1, S2) and the back panel (R), respectively, and at least one section (II, III) of which is curved.

Description

Technical Field

[0001] This invention relates to a packaging box made of composite material, comprising: a packaging box bottom having two front bottom corners and two rear bottom corners, a packaging box gable wall having two front gable corners and two rear gable corners, and a packaging box base having a front panel, a first side panel, a second side panel, and a rear panel, wherein the packaging box bottom and the packaging box gable wall are disposed on opposite sides of the packaging box base, and wherein the composite material comprises a polymer outer layer, a polymer inner layer, and a fiber-containing support layer disposed between the polymer outer layer and the polymer inner layer. Background Technology

[0002] Packaging (the "box" in its filled state) can be manufactured in various ways and from a wide range of materials. A widely adopted method involves creating cut pieces from the packaging material, which are then folded and other steps used to first form the outer skin of the box and finally the box itself. Alternatively, the box can be manufactured directly from the cut pieces, without the intermediate step of creating the outer skin. This method has the advantage of producing very flat cut pieces and outer skins, allowing for space-saving stacking. In this way, the cut pieces or outer skins can be manufactured in locations different from where the outer skin is folded and filled. Composite materials are often used, such as composites made of multiple thin layers of paper, cardboard, plastic, and / or metal, especially aluminum. This type of packaging is particularly prevalent in the food industry.

[0003] Different packaging boxes made of composite materials are known from the prior art. These boxes initially had fairly simple geometries, such as squares, while increasingly complex geometries aim to provide customers with visually appealing and functionally advantageous packaging. Packaging boxes with more complex geometries made of composite materials are known, for example, by WO02 / 04301A1, WO2011 / 154173A1, and WO2017 / 174210A1.

[0004] The disadvantage of the packaging container described in WO02 / 04301A1 lies in the structure of the composite material. This is because WO02 / 04301A1 does not describe the composite material having a plastic inner layer and a plastic outer layer, and in particular, it lacks a polymer inner layer or a polymer outer layer.

[0005] The disadvantage of the packaging known from WO2011 / 154173A1 is that the edges in the outer skin area have an angle of approximately 90° and therefore bend relatively strongly. This can lead to damage to the laminate, particularly tearing of the paper or cardboard layers of the laminate. Furthermore, the packaging shown here is difficult to manufacture because the outer perimeter has edges that bend along its entire length—that is, from the bottom to the gable wall.

[0006] The disadvantage of the composite packaging box known from WO2017 / 174210A1 is that the front side of the box transitions into the side surface without fold lines or creases, thus forming a common arch between the front and side surfaces. While this continuous transition between the front and side surfaces reduces the load on the laminate, it makes the shaping of the box more difficult and also reduces the rigidity of the outer skin. Another disadvantage is that the composite packaging box described in WO2017 / 174210A1 can only be manufactured laboriously because the back and side surfaces are not only separated from each other by fold lines, but an additional surface (“gripping panel”) is provided between these surfaces of the composite packaging box. Summary of the Invention

[0007] In this context, the object of the present invention is to design and improve the packaging box described at the beginning and in detail above, so that it is possible to manufacture packaging boxes with more complex geometries, especially liquid-sealed packaging boxes, without compromising the rigidity of the packaging box and without increasing manufacturing costs.

[0008] This objective is achieved in the packaging box provided in the embodiments of the present invention by means of a third outer skin fold line having multiple segments that are respectively adjacent to the side panel and the rear panel, and at least one of these segments is curved.

[0009] The packaging box according to the invention is made partly or entirely of a composite material. The planar composite material has multiple layers stacked and interconnected with each other, thus forming a planar composite. The planar composite material includes a polymer outer layer, a polymer inner layer, and a fiber-containing support layer disposed between the polymer outer layer and the polymer inner layer. The polymer inner layer and polymer outer layer provide liquid-sealing properties to the composite material because they are made of plastic. On the other hand, the fiber-containing support layer (preferably paper or cardboard) primarily serves to provide improved mechanical properties to the composite material, particularly improved rigidity. Additionally, a barrier layer is optionally provided, which is also disposed between the polymer outer layer and the polymer inner layer (preferably between the fiber-containing support layer and the polymer inner layer). The barrier layer can be made of, for example, aluminum, and is designed to prevent light and / or oxygen transmission. The packaging box can also have multiple folded edges, which are created during the manufacture of the packaging box by folding the planar composite material along fold lines. The packaging box initially comprises a box bottom with two front bottom corners and two rear bottom corners. Adjacent bottom corners are interconnected by lower box edges. The packaging box also includes a box gable wall with two front gable corners and two rear gable corners. Adjacent gable corners are connected to each other by upper packaging box edges. Furthermore, the packaging box includes a packaging box base having a front panel, a first side panel, a second side panel, and a rear panel. The front panel is preferably arranged opposite the rear panel, and the first side panel is preferably arranged opposite the second side panel. The bottom of the packaging box and the box gable wall are arranged on opposite sides of the packaging box base; when the packaging box stands upright on the bottom of the packaging box, the bottom of the packaging box is arranged below the packaging box base, and the box gable wall is arranged above the packaging box base.

[0010] According to the present invention, a third outer skin fold line is provided, which has multiple segments, each segment adjacent to a side panel and a rear panel, and at least one segment is curved, and at least one segment is straight. According to one embodiment of the packaging box, the third outer skin fold line can be specified to have multiple segments, each segment adjacent to a side panel and a rear panel respectively, and at least one of the multiple segments is straight. By providing a fold line between the side panel and the adjacent rear panel, a folded edge with a defined orientation is achieved, which facilitates the manufacture of the packaging box. The folded edge also improves the structural characteristics of the packaging box, particularly its rigidity, compared to a shape without curved edges. Furthermore, the curved orientation of the outer skin fold line makes it easier to create convex or concave surfaces, thereby creating an air gap between adjacent packaging boxes, which improves air circulation. If straight segments are also provided in addition to the curved segments in the third outer skin fold line, the manufacture of the packaging box becomes easier. It can be specified that a third outer skin fold line is provided between each of the two side panels and the adjacent rear panel. This third outer skin fold line has multiple segments, each adjacent to one of the side panels and the other to the rear panel, and at least one of these segments is curved and at least one of these segments is straight. Furthermore, it can be specified that the third outer skin fold line has at least two bends oriented in different directions, namely, a first bend along the direction of the side surface and a second bend along the direction of the adjacent rear surface (“arc edge”). This results in further improvement in air circulation between adjacent packaging boxes.

[0011] According to one embodiment of the packaging box, the third outer skin fold line terminates at one end of one of the two rear gable corners and at the other end of one of the two rear bottom corners. By having the third outer skin fold line terminate at or adjacent to either the gable corner or bottom corner, increased rigidity is achieved at these corners of the packaging box.

[0012] According to another embodiment of the packaging box, the sections of the third outer skin fold line adjacent to the bottom of the packaging box and the sections adjacent to the gable wall of the packaging box are straight. Using straight sections adjacent to the bottom of the packaging box and the gable wall of the packaging box is particularly advantageous because the bottom and gable wall of the packaging box can be made with simpler tools in this way.

[0013] According to another embodiment of the packaging box, at least two sections of the third outer skin fold line have opposite bending directions. Specifically, one section bends towards the rear panel, and the other section bends towards the side panel. In this way, a packaging box with convex and concave surfaces or panels can be achieved. Preferably, the section of the third outer skin fold line bending towards the side panel is located above the section of the third outer skin fold line bending towards the rear panel. This results in a wide, concave back side of the packaging box in the upper region, particularly in the upper half. Since the packaging box preferably has a narrow, convex front side in its upper region, particularly the upper half, multiple packaging boxes can be placed sequentially in a space-saving manner, thus achieving good space utilization. Furthermore, the opposite bending directions allow the reduced filling volume due to one bending direction to be compensated again by the other bending direction, so that the height of the packaging box can remain constant for a given packaging box volume.

[0014] According to one embodiment of the packaging box, the box body has at least one unloading panel disposed between the front panel and one of the two side panels. The unloading panel is used to create a transition between the front panel and the side panels as smoothly as possible. Preferably, the unloading panel extends over the entire height of the box body, i.e., from the bottom of the box to the gable wall, thus separating the front panel from the two side panels. The technical advantage of the unloading panel is that the composite material requires less drastic folding or bending compared to the 90° edges of a square box, because the transition from the front panel to the two side panels is achieved through two less drastically bent (“blunt”) edges. This results in a less intense load on the composite material and, in particular, a lower risk of tearing or breaking fibers in the fibrous support layer (paper or cardboard layer) of the composite material. Preferably, the box has two unloading panels disposed between the front panel and one of each of the two side panels. The unloading panel also allows for the creation of gaps or free spaces between adjacent boxes, unlike square boxes, within its area, through which air can circulate. This reduces the risk of mold growth due to moisture. Another advantage of the unloading panel is that the panels or surfaces adjacent to it can be constructed narrower and thus more stably, resulting in increased gripping rigidity when emptying filled boxes.

[0015] According to one embodiment of the packaging box, the unloading panel and the front panel are adjacent to the same edge of the packaging box, particularly the edge of the bottom of the packaging box. More specifically, the unloading panel and the front panel may be jointly adjacent to the lower front edge of the packaging box.

[0016] According to another embodiment of the packaging box, the unloading panel and one of the two side panels are adjacent to the same edge of the packaging box, particularly the edge of the gable wall of the packaging box. Specifically, it can be specified that the unloading panel and one of the two side panels are jointly adjacent to the upper lateral edge of the packaging box. This design preferably makes the unloading panel and the adjacent front panel and / or side panel (except in the area where the panels meet at the bottom edge or the gable wall edge) extend at an angle to each other. In other words, the unloading panel corresponds to the front panel of the packaging box in its lower region and to the side panel of the packaging box in its upper region. Thus, the unloading panel is completely "wound" around the (hypothetical) vertically extending edge of the packaging box. This design of the unloading panel has the advantage that the previously described technical effects (reduced load on the composite material, improved air circulation) occur not only on one side of the packaging box but also on both sides.

[0017] According to another embodiment of the packaging box, a first outer skin fold line is provided between at least one unloading panel and its adjacent front panel, which is preferably at least partially curved. By providing a fold line between the unloading panel and the front panel, a folded edge with a defined direction is achieved, which facilitates the manufacture of the packaging box. The folded edge also improves the structural characteristics of the packaging box, particularly its rigidity, compared to a curved shape without edges. Furthermore, the curved direction of the outer skin fold line makes it easier to create convex or concave surfaces or panels, thereby creating an air gap between adjacent packaging boxes that improves air circulation. It can be specified that a first outer skin fold line is provided between each of the two unloading panels and its adjacent front panel, and this first outer skin fold line is preferably at least partially curved. Furthermore, it can be specified that the first outer skin fold line extends in a continuously curved manner.

[0018] This implementation further specifies that the first outer skin fold line terminates only at one of its two ends at one of the two front chamfered corners or one of the two front bottom corners, and at the other end does not terminate at a chamfered corner or bottom corner. By having one end of the first outer skin fold line terminate at or adjacent to one of the two front chamfered corners or one of the two front bottom corners, increased rigidity of these corners of the packaging box is achieved. By ensuring that the other end of the first outer skin fold line does not terminate at or adjacent to a corner of the packaging box, a smooth and as flat as possible transition between the two surfaces or panels separated by the first outer skin fold line can be achieved. For example, the other end of the first outer skin fold line can be specified to terminate at or adjacent to a corner edge of the packaging box, thereby ensuring that the two surfaces or panels separated by the first outer skin fold line and converging at the corner edge of the packaging box are, in any case, partially and substantially in one plane.

[0019] According to another embodiment of the packaging box, a second outer skin fold line is provided between at least one unloading panel and its adjacent side panel, the second outer skin fold line preferably being at least partially curved. As previously explained in conjunction with the first outer skin fold line, the second outer skin fold line also enables folded edges with a defined orientation, which simplifies the manufacture of the packaging box. The folded edges also improve the structural characteristics of the packaging box, particularly its rigidity, compared to a shape without curved edges. Furthermore, the curved orientation of the outer skin fold line makes it easier to create convex or concave surfaces or panels, thereby creating air gaps between adjacent packaging boxes that improve air circulation. It can be specified that a second outer skin fold line is provided between each of the two unloading panels and its adjacent side panel, the second outer skin fold line preferably being at least partially curved. Furthermore, it can be specified that the second outer skin fold line extends in a continuously curved manner.

[0020] This implementation further specifies that the second outer skin fold line terminates only at one of its two ends at one of the two front gable corners or one of the two front bottom corners, and at the other end does not terminate at either a gable corner or a bottom corner. As previously described with respect to the first outer skin fold line, increased rigidity of the box corner can be achieved if the end of the second outer skin fold line terminates or is adjacent to that corner. By ensuring that the other end of the second outer skin fold line does not terminate at or is adjacent to a box corner, a smooth and as flat as possible transition between the two surfaces or panels separated by the second outer skin fold line can be achieved. For example, the other end of the second outer skin fold line can be specified to terminate or be adjacent to a box edge, thereby ensuring that the two surfaces or panels separated by the second outer skin fold line and converging at the box edge are, in any case, partially and substantially in one plane.

[0021] According to another embodiment of the packaging box, the box has fin-shaped seams in the area of ​​the gable wall, which fold towards the front panel. This design allows moisture to flow out better from the gable wall, for example, when the sloping gable wall slopes forward, because it does not create an upward-opening "pocket" where moisture could accumulate. Similarly, this embodiment allows for more space for an internally sealed pouring spout.

[0022] According to another embodiment of the packaging box, the gable wall of the packaging box is generally trapezoidal. The advantage of the trapezoidal shape of the gable wall is that one of the two parallel sides or edges (preferably the front edge of the gable wall) is shorter than the opposite side or edge (preferably the rear edge of the gable wall), unlike a rhombus where the opposite sides are of equal length. This allows even packaging boxes with a large volume to be easily grasped with one hand from the front.

[0023] Another embodiment of the packaging box specifies that the gable wall of the packaging box is a sloping gable wall. Specifically, it can be specified that the gable wall slopes downwards, that is, it is lower in the front region of the packaging box than in the rear region. This sloping orientation of the gable wall allows the tipping elements arranged in the gable wall region to have less impact on the stacking of the packaging boxes compared to packaging boxes with flat gable walls. This is because, unlike packaging boxes with flat gable walls, the tipping elements do not need to form the highest point of the packaging box. Furthermore, better drainage of moisture from the gable wall is possible.

[0024] According to another embodiment of the packaging box, the gable wall of the packaging box has a curved front edge adjacent to the front panel. Preferably, the front edge of the gable wall of the packaging box is curved towards the front panel. In this way, the area of ​​the gable wall of the packaging box can be increased, which, for example, makes it easier to install a tipping element with a larger diameter. The curved front edge of the gable wall of the packaging box also affects the shape of the front panel of the packaging box. In particular, the front edge curved towards the front panel can achieve an outwardly arched (convex) front panel of the packaging box. In addition to an attractive appearance, this also has the technical advantage of improving air circulation between adjacent packaging boxes, as previously described, which reduces the risk of mold growth.

[0025] According to another embodiment of the packaging box, the front panel is convexly formed and / or the rear panel is at least partially recessed. In particular, it can be specified that the packaging box is convexly formed in the upper region, especially in the upper half of the front panel region, and / or concavely formed in the upper region, especially in the upper half of the rear panel region. Through the combination of the convex front and concave rear sides, the packaging box can be arranged front-to-back in a space-saving manner despite its complex appearance.

[0026] This embodiment also proposes that the front panel has its maximum convex arch above half the height of the box body. By arching the front panel particularly far outward or forward in the upper region, the front panel can be constructed to be particularly narrow in the upper region without reducing the volume of the box relative to a square box; the forward arch thus compensates for the narrowing of the sides. Due to the narrowing of the sides, the box can be easily grasped from the front, for example, so that it can be removed from the sales shelf with one hand.

[0027] According to another embodiment of the packaging box, the two front gable corners have two large gable angles, each greater than 90°. Alternatively or additionally, the two rear gable corners can be specified to have two small gable angles, each less than 90°. By using angles not equal to 90°, a packaging box gable shape different from a rectangle or square is achieved. For example, a quadrilateral packaging box gable with two small (<90°) and two large (>90°) gable angles can be obtained by using trapezoids, parallelograms, or rhombuses. In this way, packaging box gables with edges of different lengths can be achieved, thereby, for example, achieving short front edges, through which the packaging box can be gripped particularly easily from the front.

[0028] Finally, according to another embodiment of the packaging box, the four gable angles have a sum greater than 360°. Angles not equal to 360° can be achieved, for example, by having one or more sides or edges of the quadrilateral packaging box's gable extend in a curved manner rather than straight (e.g., in the case of rounded polygons or arc polygons). Angles greater than 360° can be achieved by having at least one side or edge of the quadrilateral packaging box's gable curve outwards. The bottom angle is preferably 90°, resulting in a rectangular, particularly square, bottom for the packaging box. This design of the packaging box's gable has several advantages. Besides a more aesthetically pleasing shape, it achieves the technical effect that the packaging box can be more easily gripped with one hand because the edges of the gable (preferably the front edges) are shorter than the other edges (especially the rear edges), making the packaging box narrower at the front. Furthermore, this design results in a technical effect where the contact area between side-by-side boxes (e.g., during transport or on retail shelves) is smaller than that of square boxes where the side panels almost completely contact each other. In other words, gaps or free spaces are maintained between the side-by-side boxes, through which air can circulate. This has the advantage of reducing the risk of mold growth due to moisture. Additionally, the angles, greater than 360°, allow for more space for the tipping element. Preferably, the quadrilateral box's gable walls have angles of at least 370°, particularly at least 380°, and preferably at least 390°. Angles in the range of 390° to 410° have proven advantageous. Attached Figure Description

[0029] The invention will now be described in detail with the aid of the accompanying drawings, which show only one preferred embodiment:

[0030] Figure 1A A perspective view of the packaging box according to the present invention is shown.

[0031] Figure 1B It shows Figure 1A Front view of the packaging box in the middle.

[0032] Figure 1C It shows Figure 1A The rear view of the packaging box.

[0033] Figure 1D It shows Figure 1A Side view of the packaging box in the middle.

[0034] Figure 2A It shows Figure 1A An enlarged view of the first area of ​​the packaging box, and

[0035] Figure 2B It shows Figure 1A An enlarged view of the second area of ​​the packaging box. Detailed Implementation

[0036] Figure 1A A perspective view of the packaging box 1 according to the present invention is shown. Figure 1B Show Figure 1A Front view of packaging box 1 Figure 1C Showing the rear view, and Figure 1D A side view is shown. The packaging box 1 has a quadrilateral bottom B with two front bottom corners BV1 and BV2 and two rear bottom corners BH1 and BH2. Furthermore, the packaging box 1 has a quadrilateral gable wall G with two front gable corners GV1 and GV2 and two rear gable corners GH1 and GH2. Additionally, the packaging box 1 has a packaging box base K, which includes a front panel F, a first side panel S1, a second side panel S2, and a rear panel R. The packaging box base K is arranged between the bottom B and the gable wall G, such that the bottom B and the gable wall G are arranged on opposite sides of the packaging box base K and form the outer peripheral surface of the packaging box 1. The packaging box 1 is partially or entirely made of a composite material comprising a polymer outer layer, a polymer inner layer, and a fiber-containing support layer disposed between the polymer outer layer and the polymer inner layer. The fiber-containing support layer may, for example, be a layer made of paper or cardboard. Within the area of ​​the gable wall G, the packaging box 1 has a fin-shaped seam 2 that flips towards the front panel F. Within the area of ​​the gable wall G, the packaging box 1 also includes two ears 3, one of which abuts against the first side panel S1, and the second ear 3 abuts against the second side panel S2. In the area of ​​the rear panel R, the packaging box 1 has a longitudinal seam 4. The gable wall G is generally trapezoidal and constructed as a sloping gable wall (like a single-sloped roof). The gable wall G has a front edge V adjacent to the front panel F, which curves towards the front panel F. The shape of the gable wall will combine... Figure 2ALet's have a more detailed discussion.

[0037] Figures 1A to 1D The packaging box 1 shown has a base K with two unloading panels E1 and E2. The first unloading panel E1 is positioned between the front panel F and the first side panel S1, and the second unloading panel E2 is positioned between the front panel F and the second side panel S2. Therefore, the unloading panels E1 and E2 separate the front panel F from the two side panels S1 and S2, forming a transition between them. The first unloading panel E1 and the second unloading panel E2 are partially coplanar with the front panel F in the area adjacent to the bottom B of the packaging box. However, the first unloading panel E1 is partially coplanar with the first side panel S1 in the area adjacent to the gable wall G of the packaging box; similarly, the second unloading panel E2 is partially coplanar with the second side panel S2 in the area adjacent to the gable wall G of the packaging box. Therefore, the two unloading panels E1, E2 correspond in their lower regions to the different sides of the packaging box 1 than in their upper regions; therefore, the two unloading panels E1, E2 "wrap" around the imaginary edge of the packaging box from the front panel F toward one of the two side panels S1, S2.

[0038] exist Figures 1A to 1D In the packaging box 1 shown, a continuously curved first outer skin fold line M1 is provided between the front panel F and the first unloading panel E1. Similarly, a continuously curved first outer skin fold line M1 is provided between the front panel F and the second unloading panel E2. The upper ends of the two first outer skin fold lines M1 are adjacent to the two front gable corners GV1 and GV2. However, the two lower ends of the two first outer skin fold lines M1 are not adjacent to the two front bottom corners BV1 and BV2, but are adjacent to the lower front packaging box edge located between them. In the packaging box 1, a continuously curved second outer skin fold line M2 is also provided between the first unloading panel E1 and the first side panel S1 adjacent to it. Similarly, a continuously curved second outer skin fold line M2 is provided between the second unloading panel E2 and the second side panel S2 adjacent to it. The lower ends of the two second outer skin fold lines M2 are adjacent to the two front bottom corners BV1 and BV2. However, the two second outer skin fold lines M2, with their two upper ends not adjacent to the two front mountain-shaped corners GV1, GV2, but rather adjacent to the upper side of the packaging box edge located between the front mountain-shaped corners GV1, GV2 and the rear mountain-shaped corners GH1, GH1. Figures 1A to 1DIn the packaging box 1 shown, a third outer skin fold line M3 is provided between the first side panel S1 and the adjacent rear panel R. Similarly, a third outer skin fold line M3 is provided between the second side panel S1 and the adjacent rear panel R. The third outer skin fold line M3 has one end adjacent to one of the two rear gable corners GH1 and GH2, and its other end adjacent to one of the two rear bottom corners BH1 and BH2. The precise orientation of the third outer skin fold line M3 will combine... Figure 2B Further detailed description.

[0039] In the side view ( Figure 1D It is particularly clear from the image that the front panel F is convexly shaped, i.e., arched outwards. The front panel F has its maximum convex arch above half the height of the packaging box base K. Similarly, in... Figure 1D As can be seen, the rear panel is concave in shape, that is, it arches inward.

[0040] Figure 2A Show Figure 1A An enlarged view of the first area of ​​packaging box 1. Packaging box 1 has been assembled. Figures 1A to 1D The area described is in Figure 2A The corresponding illustrations are marked on the packaging. The first one on the box... Figure 2A The area shown relates to the area of ​​the gable wall G of the packaging box, and in particular to the front gable wall corner GV2 (and the gable wall angle α here). GV2 The area and the back gable corner GH1 (and the gable angle α here) GH1 The area of ​​) . Due to symmetry, for the other half of the mountain-shaped wall G of the packaging box ( Figure 2A The same applies to (not shown in the image). The four corners of the gable wall G of the packaging box are not right angles: the two front gable wall corners GV1 and GV2 have angles slightly greater than 90° (α). GV1 α GV2 The angle α of the front mountain wall (>90°) GV1 α GV2 Furthermore, the two rear mountain-shaped corners GH1 and GH2 have an angle slightly less than 90° (α). GH1 α GH2 The angle α of the back mountain wall (<90°) GH1 α GH2 For the angle α of the back mountain wall GH1 α GH2 The deviation from the right angle is due to the angle α adjacent to the back mountain wall. GH1 α GH2 The upper side edge of the packaging box does not extend perpendicularly to the upper rear edge of the packaging box, but is inclined at an angle β1(α) relative to the vertical line SR1. GH1 =α GH2 =90°-β1). For the front hillside angle α GV1α GV2 In general, the deviation from the right angle has two reasons: First, the angle α of the front mountain wall GV1 α GV2 The edges of the adjacent upper side packaging boxes do not run perpendicular to the edges of the rear packaging boxes, but are inclined at an angle β2 relative to the vertical line SR2. Secondly, similarly, the angle α of the front mountain wall... GV1 α GV2 The adjacent front edge V does not extend straight, but curves towards the front panel F, wherein the front edge V (or at the front gable corners GV1, GV2, or at the gable angle α here) GV1 α GV2 The tangent to the front edge V in the region of contact is inclined at an angle γ relative to the horizontal line WR (parallel to the extension of the rear edge of the upper packaging box) (α). GV1 =α GV2 = 90° + β2 + γ). Angle β1 equals angle β2; the two angles are preferably in the range between 2° and 6°. Therefore, the two back-mountain wall angles α GH1 α GH2 For example, it can be in the range of approximately 86°. The angle γ is preferably in the range between 15° and 25°. Therefore, the two fore-beam wall angles α... GV1 α GV2 For example, it can be within a range of approximately 113°. From the design described, especially from the curved front edge V, the angle of the quadrilateral packaging box's gable wall G is greater than 360° (α). GV1 +α GV2 +α GH1 +α GH2 >360°).

[0041] Figure 2B Show Figure 1A An enlarged view of the second area of ​​packaging box 1. Packaging box 1 has been assembled. Figures 1A to 2A The area described is in Figure 2B The corresponding illustrations are marked on the packaging box 1. Figure 2B The second region shown relates to the area where the third outer skin fold line M3 separates the rear panel R from the two side panels S1, S2 (in Figure 2B Only one of the two third outer skin fold lines M3 is shown; the other third outer skin fold line M3 is correspondingly applicable due to symmetry. The third outer skin fold line M3, located between the rear panel R and the adjacent side panels S1, S2, has four segments I-IV: the first segment I is adjacent to the bottom B of the packaging box and extends straight. The second segment II is adjacent to the first segment I and extends in a curved manner (towards the rear panel R). Due to this curvature, the maximum spacing d is created between the third outer skin fold line M3 and the vertical line SR3. IIThis spacing can be between 0.5 mm and 2.5 mm. The third segment III is adjacent to the second segment II and extends in a curved manner (towards the first side panel S1). Due to this curvature, the maximum spacing d is generated between the third outer skin fold line M3 and the vertical line SR3. III The maximum spacing can be between 0.5 mm and 2.5 mm. Sections II and III therefore have opposite curvatures or bending directions. Section IV is adjacent to Section III and the box gable wall G and extends in a straight line. Therefore, the third outer skin fold line M3 extends straight in some sections (in section I adjacent to the box bottom B and in section IV adjacent to the box gable wall G) and bends in some sections (in the two “middle” sections II and III).

[0042] Explanation of reference numerals in the attached figures

[0043] 1 Packaging box

[0044] 2 Fin-shaped seams

[0045] 3 Ears

[0046] 4 longitudinal joints

[0047] α GV1 α GV2 Angle of the front gable wall

[0048] α GH1 α GH2 Angle of the back mountain wall

[0049] β1, β2: Inclination angle

[0050] γ: Inclination angle

[0051] B: Bottom of the packaging box

[0052] BV1, BV2: Front bottom corner

[0053] BH1, BH2: Back bottom corner

[0054] d II d III :spacing

[0055] E1, E2: Uninstall panel

[0056] F: Front panel

[0057] G: Packaging box with gable wall

[0058] GV1, GV2: Front mountain-shaped corner

[0059] GH1, GH2: Back mountain-shaped corner

[0060] K: Packaging box base

[0061] M1: First outer skin fold line

[0062] M2: Second outer skin fold line

[0063] M3: Third outer skin fold line

[0064] R: Rear panel

[0065] S1, S1: Side panel

[0066] SR1, SR2, SR3: Perpendicular lines

[0067] V: (Front edge of the gable wall G of the packaging box)

[0068] WR: Horizontal line

[0069] Sections I, II, III, and IV (of the third outer skin fold line M3)

Claims

1. A packaging box (1) made of a composite material, comprising: a packaging box bottom (B) having two front bottom corners (BV1, BV2) and having two back bottom corners (BH1, BH2), a packaging box gable (G) having two front gable corners (GV1, GV2) and two back gable corners (GH1, GH2), and a packaging box base (K) having a front panel (F), a first side panel (S1), a second side panel (S2) and a back panel (R), wherein the packaging box bottom (B) and the packaging box gable (G) are arranged on opposite sides of the packaging box base (K), wherein the composite material comprises a polymer outer layer, a polymer inner layer and a fiber-containing support layer arranged between the polymer outer layer and the polymer inner layer, and a third skin fold line (M3) having a plurality of sections (I, II, III, IV), each of which adjoins one side panel (S1, S2) and the back panel (R), respectively, and at least one section (II, III) of which is curved, wherein at least one section (I, IV) of the third skin fold line (M3) is straight and at least two sections (II, III) of the third skin fold line (M3) have opposite directions of curvature.

2. The packaging box (1) according to claim 1, characterized in that the third skin fold line (M3) ends with one of its two end portions in one of the two back gable corners (GH1, GH2) and with its other end portion in one of the two back bottom corners (BH1, BH2).

3. The packaging box (1) according to claim 1 or 2, characterized in that the section (I) of the third skin fold line (M3) adjoining the packaging box bottom (B) and the section (IV) of the third skin fold line (M3) adjoining the packaging box gable (G) are straight.

4. The packaging box (1) according to claim 1, characterized in that the packaging box base (K) has at least one ejection panel (E1, E2) arranged between the front panel (F) and one of the two side panels (S1, S2).

5. The packaging box (1) according to claim 4, characterized in that the ejection panel (E1, E2) and the front panel (F) adjoin the same edge of the packaging box (1), which is an edge of the packaging box bottom (B).

6. The packaging box (1) according to claim 4, characterized in that the ejection panel (E1, E2) and one of the two side panels (S1, S2) adjoin the same edge of the packaging box (1), which is an edge of the packaging box gable (G).

7. The packaging box (1) according to claim 4, characterized in that a first skin fold line (M1) is arranged between at least one ejection panel (E1, E2) and the front panel (F) adjoining it, which first skin fold line is at least partially curved.

8. The packaging box (1) according to claim 7, characterized in that the first outer skin fold line (M1) ends with one of its two end portions in one of the two front gable corners (GV1, GV2) or one of the two front base corners (BV1, BV2) and with its other end portion does not end in a gable corner (GV1, GV2, GH1, GH2) or a base corner (BV1, BV2, BH1, BH2).

9. The packaging box (1) according to claim 4, characterized in that a second outer skin fold line (M2) is provided between at least one of the ejection panels (E1, E2) and the side panel (S1, S2) adjoining thereto, which second outer skin fold line is at least partially curved.

10. The packaging box (1) according to claim 9, characterized in that the second outer skin fold line (M2) ends with one of its two end portions in one of the two front gable corners (GV1, GV2) or one of the two front base corners (BV1, BV2) and with its other end portion does not end in a gable corner (GV1, GV2, GH1, GH2) or a base corner (BV1, BV2, BH1, BH2).

11. The packaging box (1) according to claim 1, characterized in that the packaging box (1) has in the region of the packaging box gable (G) a fin-shaped joint (2) which is turned in the direction of the front panel (F).

12. The packaging box (1) according to claim 1, characterized in that the packaging box gable (G) is trapezoidal.

13. The packaging box (1) according to claim 1, characterized in that the packaging box gable (G) is a sloping gable.

14. The packaging box (1) according to claim 1, characterized in that the packaging box gable (G) has a curved front edge (V) adjoining the front panel (F).

15. The packaging box (1) according to claim 1, characterized in that the front panel (F) is convexly shaped and / or the rear panel (R) is at least partially concavely shaped.

16. The packaging box (1) according to claim 15, characterized in that the front panel (F) has its greatest convex arching above half the height of the packaging box base body (K).

17. The packaging box (1) according to claim 1, characterized in that The two front gable corners (GV1, GV2) have two large gable corner angles (a GV1 , a GV2 ) each greater than 90°.

18. The packaging box (1) according to claim 1, characterized in that The two rear gable corners (GH1, GH2) have two small gable corner angles (a GH1 , a GH2 ) each of less than 90°.

19. The packaging box (1) according to claim 1, characterized in that two gable corner angles (α GV1 , α GV2 ) of the two front gable corners (GV1, GV2) and two gable corner angles (α GH1 , α GH2 ) of the two rear gable corners (GH1, GH2) have an angle sum of more than 360°.

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