Packaging blank for forming package and package formed from packaging blank
By optimizing the creasing pattern design of the packaging blank, the problem of wild crease lines formed during processing is solved, and the stability and quality of the packaging are improved.
Patent Information
- Application Number
- CN202380054044.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Priority Date
- 2022-08-02
- Filing Date
- 2023-06-26
- Publication Date
- 2025-03-04
AI Technical Summary
Existing packaging blanks are prone to form wild crease lines during processing, affecting the quality and stability of the packaging.
By optimizing the creasing pattern design of the packaging blank, the distance between the first and third lateral crease lines and the longitudinal boundary edges is greater than the distance between the second and fourth lateral crease lines and the longitudinal boundary edges, thereby reducing or eliminating the formation of wild crease lines.
It effectively reduces the formation of wild crease lines and improves the processing stability and packaging quality of packaging blanks.
Smart Images
Figure CN119562924A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a packaging blank, in particular a packaging blank with a multilayer structure, for forming a package filled with a pourable product, in particular a pourable food product.
[0002] Advantageously, the invention also relates to a package formed from a packaging blank and filled with a pourable product, in particular a pourable food product. Background Art
[0003] As is known to all, many liquid or pourable foods, such as fruit juice, UHT (ultra-high temperature treated) milk, wine, ketchup, etc., are sold in packages made of sterilized packaging materials.
[0004] A typical example is a parallelepiped-shaped package for liquid or pourable foods, called Tetra Brik Aseptic (registered trademark), which is made by sealing and folding a laminated packaging blank. The packaging blank has a multilayer structure, including a fiber base layer (e.g. paper or paperboard) covered on both sides with layers of heat-sealable plastic material (e.g. polyethylene). For aseptic packaging for long-term storage products (e.g. UHT milk), the packaging blank also includes a layer of oxygen barrier material (oxygen barrier layer), such as aluminum foil, which is superimposed on a layer of heat-sealable plastic material and then covered with another layer of heat-sealable plastic material to form the inner surface of the package that finally contacts the food.
[0005] Such packaging is usually produced on a fully automatic packaging device, which forms the packaging from corresponding packaging blanks. These packaging blanks can be provided in the form of individual packaging blanks or in the form of a roll formed from a plurality of packaging blanks arranged in a row.
[0006] In case the packaging device is designed to form packages from a web, the packaging device advances and sterilizes the web, then forms it into tubes and fills the tubes with the pourable product before forming the individual sealed packages.
[0007] In order to facilitate forming and defining the shape of the package, the package blank is provided with a plurality of crease lines.
[0008] Typically, the packaging blank has a rectangular shape and is delimited by a first longitudinal border edge, a second longitudinal border edge, a first transverse border edge and a second transverse border edge.
[0009] The typical packaging blank also includes a top crease pattern configured to form a top portion of the package and a bottom crease pattern configured to form a bottom portion of the package. The top crease pattern includes at least a first transverse crease line and a second transverse crease line, and the bottom crease pattern includes at least a third transverse crease line and a fourth transverse crease line. In addition, the first transverse crease line and the second transverse crease line and the third transverse crease line and the fourth transverse crease line are equidistant from the first longitudinal boundary edge and the second longitudinal boundary edge.
[0010] As is known, packaging blanks are produced in processing plants, where a packaging material base web is formed, which produces a plurality of packaging blank webs after a cutting process has been performed. In other words, the packaging material base web comprises a plurality of packaging blank webs connected to each other and arranged in parallel before being cut in a direction parallel to its longitudinal extension.
[0011] In addition, before the cutting process, a crease tool is used to form various crease lines. More specifically, the crease tool includes at least: - a first creasing element associated with a first portion of a base web of packaging material, which produces a first packaging blank web; and - A second creasing element associated with a second portion of the base web of packaging material, connected to the first portion and producing a second web of packaging blanks.
[0012] The first portion of the base roll of packaging material and the second portion of the packaging material web are arranged side by side, ie adjacent to each other, along a direction arranged transversely, in particular perpendicularly, with respect to the longitudinal extension of the packaging material web.
[0013] The first and second creasing elements are staggered with respect to each other such that, for example, the respective top crease pattern of the first portion is displaced relative to the respective top crease pattern of the second portion in the advancing direction of the base roll of packaging material.
[0014] During the action of the creasing tool on the base roll of packaging material, so-called wild crease lines may be generated. These wild crease lines may, for example, extend from a corresponding first transverse crease line such as the first portion towards the second portion.
[0015] The field would like to further improve packaging blanks in order to prevent the formation of wild crease lines as much as possible. Summary of the invention
[0016] It is therefore an object of the present invention to provide improved packaging blanks.
[0017] Another object of the present invention is to provide an improved package formed from a packaging blank.
[0018] According to the invention, a packaging blank as claimed in claim 1 is provided.
[0019] Preferred non-limiting embodiments of the packaging blank are set out in the respective dependent claims.
[0020] According to the present invention, there is also provided a package according to claim 15. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] A non-limiting embodiment of the present invention will be described by way of example with reference to the accompanying drawings, in which:
[0022] Figure 1 is a schematic diagram of a packaging machine for forming packages with parts removed for clarity;
[0023] Figure 2 is a top view of a packaging blank according to the present invention, with parts removed for clarity. DETAILED DESCRIPTION
[0024] The number 1 denotes an overall packaging machine, which is used to pack corresponding packaging blanks 2 (see Figure 2 5 ) to produce a (sealed) package 37 for a pourable product (in particular a pourable food product, such as pasteurized milk, juice, wine, ketchup, etc.).
[0025] Preferably, the packaging blank 2 may have a multi-layer structure.
[0026] In more detail, each packaging blank 2 may comprise at least one layer of fibrous material, such as a layer of paper or cardboard, and at least two layers of heat-sealable plastic material, such as polyethylene, interposed between each other.
[0027] One of the two layers of heat-seal plastic material may define the inner surface of a respective package 37 formed from a respective package blank 2 and ultimately contact the pourable product.
[0028] Preferably, but not necessarily, each packaging blank 2 may also include a gas barrier and light barrier material layer (e.g., aluminum foil or ethylene vinyl alcohol (EVOH) film), in particular arranged between one of the heat-sealable plastic material layers and the fiber material layer. Preferably, but not necessarily, the packaging blank 2 may also include another heat-sealable plastic material layer, which is between the gas barrier and light barrier material layer and the fiber material layer.
[0029] according to Figure 1 In the example shown in , the packaging blank 2 is provided in the form of a roll 3 .
[0030] In more detail, the web 3 may be formed from a plurality of packaging blanks 2 arranged in series.
[0031] In other words, the package blanks 2 arranged in succession define a plurality of repeating units of the web 3. In particular, each repeating unit (i.e. a respective package blank 2) forms a precursor of a respective package 37. In other words, the packaging machine 1 can be configured to produce packages 37 from the web 3 such that each package 37 comes from a respective package blank 2.
[0032] In particular, each packaging blank 2 may comprise a desired pattern / decoration.
[0033] Each packaging blank 2 may be designed to form a package 37 comprising: - a first packaging part 38, in particular having a first wall; a second packaging part 40 , in particular having a second wall, which is offset from the first packaging part 38 in the longitudinal direction of the packaging 37 an intermediate packaging part 39 , in particular having side walls, being (fixedly) connected to the first packaging part 38 , in particular the first wall, and extending from the first packaging part 38 .
[0034] In more detail, each first package portion 38 and each second package portion 40 may respectively define a bottom portion and a top portion of a corresponding package.
[0035] In addition, each intermediate packing portion 39 may be interposed between a corresponding first packing portion 38 and a corresponding second packing portion 40 .
[0036] In particular, when each package 37 is in its nominal position (ie, when used by a user in the intended manner), the user identifies the first package portion 38 as the bottom portion and the second package portion 40 as the top portion.
[0037] Preferably, each second packaging part 40 can be defined as the part of packing, and it can be manipulated to allow to pour out the pourable product.For example, the second packaging part 40 can be manipulated to obtain pouring opening, and perhaps the second packaging part 40 can comprise the opening device (for example lid) that can be manipulated.
[0038] Preferably, each intermediate portion 39 may be defined to be grasped by a user.
[0039] In more detail, each first wall may define a support surface of a respective package 37 , which may be designed to come into contact with a support (eg a shelf) when in use (eg when displayed within a point of sale or when in storage).
[0040] In particular, each first wall may define a bottom wall of the respective package 37 (ie the first wall is in contact with the support when the respective package 37 is arranged on the support).
[0041] More specifically, each side wall may be circular, or may have at least one or more circular portions.
[0042] Furthermore, each side wall may be interposed between a corresponding first wall and a corresponding second wall.
[0043] In particular, the respective second wall may define a respective top wall when the package 37 is arranged on the support.
[0044] According to some possible embodiments, each first wall and the corresponding second wall can be parallel to each other. Alternatively, the first wall and the second wall can be inclined relative to each other. Specifically, the second wall can define an inclined top or can define a part of a gable top.
[0045] Special References Figure 2 , each packaging blank 2 may include: - a top fold pattern 4, which is configured to form a respective second package part 40, preferably a respective top part, even more preferably a top wall and a top cover, of a respective package 37; and - A bottom crease pattern 5, which is configured to form a respective first package part 38, preferably a respective bottom part, even more preferably a respective bottom wall and bottom flap of a respective package 37.
[0046] In more detail, each top crease pattern 4 may define a respective top region 6 , and each bottom crease pattern 5 may define a respective bottom region 7 of the respective packaging blank 2 .
[0047] In more detail, each packaging blank 2 may comprise: a first 8 and a second 9 longitudinal border edge, which are spaced apart from one another along a first direction D1 transversely, preferably perpendicularly, to the longitudinal centre axis A of the respective packaging blank 2; and - A first transverse boundary edge 10 and a second transverse boundary edge 11, which are spaced apart from each other along a second direction D2, wherein the second direction D2 is parallel to the longitudinal center axis A and / or transversely (preferably perpendicularly) to the first direction D1 and / or transversely (preferably perpendicularly) to the transverse center axis B of the corresponding packaging blank 2.
[0048] Preferably, each transverse central axis B may be perpendicular to the corresponding longitudinal central axis A.
[0049] Preferably, each longitudinal centre axis A may intersect a corresponding transverse centre axis B in a centre point of the corresponding packaging blank 2 .
[0050] In more detail, each packaging blank 2 may extend in a plane spanned by the longitudinal centre axis A and the transverse B axis.
[0051] Furthermore, each packaging blank 2 may have a (substantially) two-dimensional shape, ie the respective extension of each packaging blank 2 along the longitudinal centre axis A and the transverse centre axis B is significantly greater than the thickness of the packaging blank 2 .
[0052] Preferably, each packaging blank 2 may have a rectangular or square shape.
[0053] In addition, the first direction D1 can be parallel to the transverse center axis B.
[0054] Furthermore, each first longitudinal border edge 8 and each second longitudinal border edge 9 may be connected to and interposed between a respective first lateral border edge 10 and a respective second lateral border edge 11 .
[0055] Preferably, each first longitudinal border edge 8 and each second longitudinal border edge 9 may be arranged at an angle of approximately 90° with respect to the respective first lateral border edge 10 and the respective second lateral border edge 11 .
[0056] It should be noted that, when each packaging blank 2 is arranged individually (i.e. separated from other packaging blanks 2), the corresponding first longitudinal boundary edge 8, the corresponding second longitudinal boundary edge 9, the corresponding first transverse boundary edge 10 and the corresponding second transverse boundary edge 11 can be real edges.
[0057] In the case where the packaging blank 2 is arranged in the form of a web 3, the respective first longitudinal border edge 8 and the respective second longitudinal border edge 9 may be real edges (eg Figure 2 ), and the corresponding first transverse boundary edge 10 and the corresponding second transverse boundary edge 11 can be virtual edges. In particular, each first transverse boundary edge 10 of a packaging blank 2 can be adjacent to or overlap with the corresponding second transverse boundary edge 11 of another packaging blank 2.
[0058] Alternatively, the respective first transverse boundary edge 10 and the respective second transverse boundary edge 11 may be real edges, while the respective first longitudinal boundary edge 8 and the respective second longitudinal boundary edge 9 may be virtual edges. In particular, each first longitudinal boundary edge 8 of one packaging blank 2 may be adjacent to the respective second longitudinal boundary edge 9 of another packaging blank 2.
[0059] Furthermore, each longitudinal centre axis A may allow defining a respective longitudinal centre axis of a respective package 37 formed from a respective package blank 2 .
[0060] Special References Figure 2Each top fold pattern 4 comprises at least a first transverse fold line 15 and a second transverse fold line 16 , which extend transversely to the longitudinal center axis A of the corresponding packaging blank 2 .
[0061] Preferably, each first transverse crease line 15 and the corresponding second transverse crease line 16 are offset from each other along the second direction D2.
[0062] Preferably, each first transverse crease line 15 is interposed between the respective first transverse boundary edge 10 and the second transverse crease line 16. In other words, each first transverse crease line 15 is closer to the respective first transverse boundary edge 10 than the respective second transverse crease line 16.
[0063] According to some preferred non-limiting embodiments, no other transverse crease lines transverse to the respective longitudinal center axis A are interposed between the respective first transverse boundary edge 10 and the respective first transverse crease line 15 .
[0064] Special References Figure 2 Each bottom fold pattern 5 may comprise at least a third transverse fold line 17 and a fourth transverse fold line 18 , which extend transversely to a respective longitudinal centre axis A of a respective packaging blank 2 .
[0065] Preferably, each third transverse crease line 17 and the corresponding fourth transverse crease line 18 are offset from each other along the second direction D2.
[0066] Preferably, each third transverse crease line 17 is interposed between the respective second transverse boundary edge 11 and the respective fourth transverse crease line 18. In other words, each third transverse crease line 17 is closer to the respective second transverse boundary edge 11 than the respective fourth transverse crease line 18.
[0067] According to some preferred non-limiting embodiments, no other transverse crease lines transverse to the respective longitudinal centre axis A are interposed between the respective second transverse boundary edge 11 and the respective third transverse crease line 17 .
[0068] According to some preferred non-limiting embodiments, each first transverse crease line 15 and / or each third transverse crease line 17 may be parallel to the respective first transverse boundary edge 10 and the respective second transverse boundary edge 11 .
[0069] In more detail, each first transverse crease line 15, each second transverse crease line 16, each third transverse crease line 17 and each fourth transverse crease line 18 may extend between a corresponding first end 19 facing and / or adjacent to the corresponding first longitudinal boundary edge 8 and a corresponding second end 20 facing and / or adjacent to the corresponding second longitudinal boundary edge 9.
[0070] According to some possible non-limiting embodiments, one or more of the first transverse crease line 15, the second transverse crease line 16, the third transverse crease line 17 and the fourth transverse crease line 18 may extend in a continuous manner (i.e., there is no interruption in the corresponding crease line) or in a discontinuous manner (i.e., there are one or more interruptions in the corresponding crease line) between the corresponding first end 19 and the corresponding second end 20.
[0071] In the particular embodiment shown, each first transverse crease line 15, each second transverse crease line 16 and each fourth transverse crease line 18 are continuous.
[0072] More specifically, in the particular example shown, each first transverse crease line 15 and each fourth transverse crease line 18 is continuous and has a straight line shape, whereas each second transverse crease line 16 is continuous but has a more complex configuration.
[0073] Furthermore, according to the specific example, each third transverse crease line 17 is discontinuous and comprises a plurality of straight line portions 25 .
[0074] Advantageously, the respective first end 19 of each second transverse crease line 16 is closer to the respective first longitudinal boundary edge 8 than the respective first end 19 of the respective first transverse crease line 15; and / or - the respective second end 20 of each transverse crease line 16 is closer to the respective second longitudinal boundary edge 9 than the respective second end 20 of the respective first transverse crease line 15; and / or - the respective first end 19 of each fourth transverse crease line 18 is closer to the respective first longitudinal boundary edge 8 than the respective first end 19 of the respective third transverse crease line 17; and / or The respective second end 20 of each fourth transverse crease line 18 is closer to the respective second longitudinal boundary edge 9 than the respective second end 20 of the respective third transverse crease line 17 .
[0075] In other words, the respective first end 19 of each first transverse crease line 15 is closer to the respective longitudinal centre axis A than the respective first end 19 of the respective second transverse crease line 16; and / or - the respective second end 20 of each first transverse crease line 15 is closer to the respective longitudinal centre axis A than the respective second end 20 of the respective second transverse crease line 16; and / or - the respective first end 19 of each third transverse crease line 17 is closer to the respective longitudinal centre axis A than the respective first end 19 of the respective fourth transverse crease line 18; and / or The respective second end 20 of each third transverse crease line 17 is closer to the respective longitudinal centre axis A than the respective second end 20 of the respective fourth transverse crease line 18 .
[0076] In more detail, a respective first distance d1 between a respective first end 19 of each first transverse crease line 15 and a respective first longitudinal boundary edge 8 is greater than a respective second distance d2 between a respective first end 19 of a respective second transverse crease line 16 and a respective first longitudinal boundary edge 8; and / or - a respective third distance d3 between the respective second end 20 of each first transverse crease line 15 and the respective second longitudinal border edge 9 is greater than a respective fourth distance d4 between the respective second end 20 of the respective second transverse crease line 16 and the respective second longitudinal border edge 9; and / or - a respective fifth distance d5 between the respective first end 19 of each third transverse crease line 17 and the respective first longitudinal border edge 8 is greater than a respective sixth distance d6 between the respective first end 19 of the respective fourth transverse crease line 18 and the respective first longitudinal border edge 8; and / or A respective seventh distance d7 between the respective second end 20 of each third transverse crease line 17 and the respective second longitudinal border edge 9 is greater than a respective eighth distance d8 between the respective second end 20 of the respective fourth transverse crease line 18 and the respective second longitudinal border edge 9 .
[0077] In particular, each first distance d1, each second distance d2, each third distance d3, each fourth distance d4, each fifth distance d5, each sixth distance d6, each seventh distance d7 and each eighth distance d8 are determined relative to a reference axis perpendicular to the corresponding first longitudinal boundary edge 8 or the corresponding second longitudinal boundary edge 9.
[0078] According to some preferred non-limiting embodiments, no further crease lines are interposed between each first end 19 and the corresponding first longitudinal border edge 8 and / or no further crease lines are interposed between each second end 20 and the corresponding second longitudinal border edge 9 .
[0079] For special reference see Figure 2 Each second transverse fold line 16 may include a plurality of first linear portions 21 perpendicular to the corresponding longitudinal center axis A and a plurality of second linear portions 22 transverse to the corresponding longitudinal center axis A.
[0080] In more detail, each top crease pattern 4 may comprise a plurality of additional crease lines 23 , preferably some parallel to the respective longitudinal centre axis A and some transverse to the respective longitudinal centre axis A. In particular, the additional crease lines 23 may be interposed between the respective first transverse crease lines 15 and the respective second transverse crease lines 16 .
[0081] In more detail, each bottom crease pattern 5 may comprise a plurality of additional crease lines 24 , preferably some parallel to the respective longitudinal centre axis A and some transverse to the respective longitudinal centre axis A. In particular, the additional crease lines 24 may be interposed between the respective third transverse crease line 17 and the respective fourth transverse crease line 18 .
[0082] Special References Figure 2 , each top fold pattern 4 and each bottom fold pattern 5 can define a middle area 28 which is designed to form a side wall of a corresponding package 37 .
[0083] In more detail, each intermediate region 28 may be interposed between a respective second transverse crease line 16 and a respective fourth transverse crease line 18 .
[0084] According to some preferred non-limiting embodiments, no crease line (preferably substantially parallel to the respective longitudinal center axis A) extends from the respective second transverse crease line 16 and up to the respective fourth transverse crease line 18 .
[0085] According to some preferred non-limiting embodiments, each packaging blank 2 may also include one or more first linear crease lines 29 (which extend from the corresponding second transverse crease line 16 and are located in the corresponding middle area 28) and / or one or more second linear crease lines 30 (which extend from the corresponding fourth transverse crease line 18 and are located in the corresponding middle area 28).
[0086] Advantageously, each first linear crease line 29 can extend from the corresponding second transverse crease line 16 and towards (in particular not reaching) the corresponding fourth transverse crease line 18 and / or each second linear crease line 30 can extend from the corresponding fourth transverse crease line 18 and towards (but in particular not reaching) the corresponding second transverse crease line 16.
[0087] Preferably, each first linear crease line 29 and each second linear crease line 30 may extend along only a portion of the corresponding intermediate region 28 .
[0088] Preferably, each first linear crease line 29 may be parallel to the longitudinal center axis A.
[0089] According to some preferred non-limiting embodiments, each second linear crease line 30 may face at least a corresponding first linear crease line 29 .
[0090] According to some preferred non-limiting embodiments, each packaging blank 2 may comprise a plurality of pairs of second linear crease lines 30 .
[0091] Preferably, each pair of respective second linear crease lines 30 may be arranged to define a V-shape, preferably with the intersection being located on the respective fourth transverse crease line 18 or at least adjacent thereto.
[0092] According to some preferred non-limiting embodiments, the individual fold lines (e.g. the first transverse fold line 15 and / or the second transverse fold line 16 and / or the third transverse fold line 17 and / or the fourth transverse fold line 18 and / or the additional fold line 22 and / or the additional fold line 23 and / or the first linear fold line 29 and / or the second linear fold line 30) of each packaging blank 2 may define a plurality of panels. More specifically, the panels may give a starting point and / or may correspond to individual sections of the respective packaging 37.
[0093] More specifically, the panels may give a starting point and / or may correspond to a respective first packaging portion 38 (preferably a respective bottom portion), a respective middle packaging portion 39 and a respective second packaging portion 40 (preferably a respective top portion).
[0094] Even more specifically, some panels may give a starting point and / or may correspond to a corresponding first packaging portion 38 and / or some panels may give a starting point and / or may correspond to a second packaging portion 40 and / or some panels may give a starting point and / or may correspond to an intermediate packaging portion 39.
[0095] According to some preferred non-limiting embodiments, the corresponding first linear crease line 29 of each packaging blank 2 can be arranged to correspond to a corresponding segment defined by one or more corresponding panels, which segment in turn corresponds to a corresponding corner of a corresponding second packaging part 40 (preferably corresponding to a corresponding top part, and even more preferably corresponding to a corresponding second wall).
[0096] According to some possible non-limiting embodiments, each second linear crease line 30 can be arranged to correspond to a corresponding segment defined by one or more corresponding panels, which corresponding segment in turn corresponds to a corresponding corner of a corresponding first packaging part 38 (preferably corresponding to a corresponding bottom part, and even more preferably corresponding to a corresponding first wall).
[0097] In particular, the top crease pattern 4 defines a panel that forms a top portion of the package 37, preferably a top wall.
[0098] Similarly, the bottom crease pattern 5 defines a panel that forms a bottom portion of the package 37, preferably a bottom wall.
[0099] In this case, each first linear crease line 29 of the packaging blank 2 may be arranged to correspond to a segment defined by one or more respective panels, which in turn correspond to a respective corner of the top portion (even more preferably the second wall).
[0100] Similarly, each second linear crease line 30 of the packaging blank 2 may be arranged to correspond to a segment defined by one or more respective panels, which in turn correspond to a respective corner of the bottom portion (even more preferably the first wall).
[0101] Special References Figure 1 , the packaging machine 1 may be configured to form respective packages 37 filled with the pourable product from packaging blanks 2 , preferably provided in the form of respective webs 3 .
[0102] In more detail, the packaging machine 1 may comprise at least: a conveying device 41 configured to advance the coil 3 along a coil advancement path P at least to a tube forming station where the coil 3 is formed into a tube 42; and - a tube forming and sealing device 43 configured to form a tube 42 from the web 3 and to longitudinally seal the tube 42 at the tube forming station; a filling device 44 configured to fill the tube 42 with the pourable product; and A package forming unit 45 configured to form, transversely seal and cut the tube 42 to obtain the packages 37 .
[0103] From the above description, the advantages of the packaging blank 2 according to the invention will be apparent.
[0104] In particular, the applicant has observed that by making the distance between the first transverse crease line 15 and / or the third transverse crease line 17 and the corresponding first longitudinal boundary edge 8 and / or the corresponding second longitudinal boundary edge 9 respectively greater than the distance between them and the corresponding second transverse crease line 16 and the corresponding fourth transverse crease line 18, the risk of forming wild crease lines can be at least reduced and ultimately even eliminated.
[0105] Obviously, changes may be made to the packaging blank 2 described herein without departing from the scope of protection defined in the appended claims.
Claims
1.- A packaging blank (2) for forming a package (37) filled with a pourable product, comprising: - a first longitudinal border edge (8) and a second longitudinal border edge (9), the first longitudinal border edge (8) and the second longitudinal border edge (9) being spaced apart from each other along a first direction (D1) transverse to the longitudinal centre axis (A) of the packaging blank (2); and - a first transverse boundary edge (10) and a second transverse boundary edge (11), said first transverse boundary edge (10) and said second transverse boundary edge (11) being spaced apart from each other along a second direction (D2) parallel to said longitudinal centre axis (A); - a top crease pattern (4) configured to form a top portion of the package (37); as well as - a bottom crease pattern (5) which deviates from the top crease pattern (4) along the second direction (D2) and is configured to form a bottom portion of the package (37); wherein the top fold pattern (4) comprises at least a first transverse fold line (15) and a second transverse fold line (16), which extend transversely to the longitudinal center axis (A) of the packaging blank (2), the first transverse fold line (15) being interposed between the first transverse boundary edge (10) and the second transverse fold line (16); wherein the bottom fold pattern (5) comprises at least a third transverse fold line (17) and a fourth transverse fold line (18), which extend transversely to the longitudinal center axis (A) of the packaging blank (2), the third transverse fold line (17) being interposed between the second transverse boundary edge (11) and the fourth transverse fold line (18); wherein each of the first transverse crease line (15), the second transverse crease line (16), the third transverse crease line (17) and the fourth transverse crease line (18) extends between a respective first end (19) facing the first longitudinal boundary edge (8) and a respective second end (20) facing the second longitudinal boundary edge (9); in: - said first end (19) of said second transverse crease line (16) is closer to said first longitudinal boundary edge (8) than said first end (19) of said first transverse crease line (15); and / or - said second end (20) of said second transverse crease line (16) is closer to said second longitudinal boundary edge (9) than said second end (20) of said first transverse crease line (15); and / or - said first end (19) of said fourth transverse crease line (18) is closer to said first longitudinal boundary edge (8) than said first end (19) of said third transverse crease line (17); and / or - said second end (20) of said fourth transverse crease line (18) is closer to said second longitudinal boundary edge (9) than said second end (20) of said third transverse crease line (17). 2.- Packaging blank according to claim 1, wherein a first distance (d1) between the first end (19) of the first transverse crease line (15) and the first longitudinal boundary edge (8) is greater than a second distance (d2) between the first end (19) of the second transverse crease line (16) and the first longitudinal boundary edge (8); and / or - a third distance (d3) between said second end (20) of said first transverse crease line (15) and said second longitudinal border edge (9) is greater than a fourth distance (d4) between said second end (20) of said second transverse crease line (16) and said second longitudinal border edge (9); and / or - a fifth distance (d5) between the first end (19) of the third transverse crease line (17) and the first longitudinal border edge (8) is greater than a sixth distance (d6) between the first end (19) of the fourth transverse crease line (18) and the first longitudinal border edge (8); and / or - a seventh distance (d7) between the second end (20) of the third transverse crease line (17) and the second longitudinal boundary edge (9) is greater than an eighth distance (d8) between the second end (20) of the fourth transverse crease line (18) and the second longitudinal boundary edge (9). 3.-Packaging blank according to claim 1 or 2, wherein No further transverse fold lines transverse to said longitudinal centre axis (A) are interposed between said first transverse boundary edge (10) and said first transverse fold line (15); and / or No further transverse crease lines transverse to said longitudinal centre axis (A) are interposed between said second transverse boundary edge (11) and said third transverse crease lines (17). 4.-Packaging blank according to any one of the preceding claims, wherein The second transverse fold line (16) includes a plurality of first linear portions (21) perpendicular to the longitudinal center axis (A) and a plurality of second linear portions (22) transverse to the longitudinal center axis (A) and the first linear portions (21). 5.- A packaging blank according to any one of the preceding claims, wherein the second transverse fold line (16) and the fourth transverse fold line (18) delimit an intermediate region (28) designed to form a side wall of the package (37). 6.- Packaging blank according to claim 5, wherein there are no longitudinal fold lines extending from the second transverse fold line (16) up to the fourth transverse fold line (18). 7.- A packaging blank according to claim 5 or 6, and further comprising one or more first linear crease lines (29) extending from the second transverse crease line (16) and located in the middle area (28) and / or one or more second linear crease lines (30) extending from the fourth transverse crease line (18) and located in the middle area (28). 8.-Package blank according to claim 7, wherein at least the first transverse fold line (15), the second transverse fold line (16), the third transverse fold line (17) and the fourth transverse fold line (18) define respective panels giving a starting point and / or corresponding to at least the top portion and the bottom portion of the respective package (37); Wherein each first linear crease line (29) corresponds to a corresponding segment arrangement defined by one or more corresponding panels, and the corresponding segment corresponds to a corresponding corner of the corresponding top of the corresponding package (37), and / or wherein each second linear crease line (30) corresponds to a corresponding segment arrangement defined by one or more corresponding panels, and the corresponding segment corresponds to a corresponding corner of the corresponding bottom of the corresponding package (37). 9.- A packaging blank according to claim 7 or 8, wherein the top crease pattern (4) defines a panel forming the top portion of the package (37), and the bottom crease pattern (5) defines a panel forming the bottom portion of the package (27); in, Each first linear crease line (29) corresponds to a segment arrangement defined by one or more panels, which segment corresponds to a corner of the top portion of the package (27), and / or each second linear crease line (30) corresponds to a segment arrangement defined by one or more panels, which segment corresponds to a corner of the bottom portion of the package (27). 10.- Packaging blank according to any of the preceding claims, wherein the top folding pattern (4) comprises a plurality of first additional folding lines (23) which are arranged between the first transverse folding lines (15) and the second transverse folding lines (16), and / or The bottom crease pattern (5) comprises a plurality of second additional crease lines (24), which are arranged between the third transverse crease line (17) and the fourth transverse crease line (18). 11.- Packaging blank according to any of the preceding claims, wherein the first transverse crease line (15) and / or the third transverse crease line (17) are parallel to the first transverse boundary edge (10) and the second transverse boundary edge (11). 12.- Packaging blank according to any one of the preceding claims, wherein No further folding lines are interposed between each first end (19) and the first longitudinal border edge (8), and / or no further folding lines are interposed between each second end (20) and the respective second longitudinal border edge (9). 13.-Packaging blank according to any of the preceding claims, wherein the packaging blank (2) comprises a multilayer structure. 14.- Packaging blank according to claim 13, wherein the packaging blank comprises at least one layer of fibrous material and two layers of heat-sealing plastic material interposing the layer of fibrous material between each other. 15.- A package (37) filled with a pourable product, formed from a packaging blank (2) according to any of the preceding claims.