Manufacturing method and device for packaging sleeve, and method and system for manufacturing packaging
Patent Information
- Application Number
- PCT/CN2025/107035
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-07-05
- Filing Date
- 2025-07-04
- Publication Date
- 2026-01-08
Smart Images
Figure CN2025107035_08012026_PF_FP_ABST
Abstract
Description
Method and apparatus for manufacturing a packaging sleeve, method and system for manufacturing a package
[0001] Cross Reference to Related Applications
[0002] This application is based on and claims priority to Chinese Patent Application No. 202410898238.4, filed on July 5, 2024, entitled “Method and apparatus for manufacturing a packaging sleeve, method and system for manufacturing a package”, the disclosure of which is hereby incorporated by reference in its entirety as part of the present application. TECHNICAL FIELD
[0003] The present application relates to the field of packaging, and in particular to a method and apparatus for manufacturing a packaging sleeve, a method and system for manufacturing a package. BACKGROUND
[0004] In manufacturing a food package containing a liquid food (e.g. milk, beverage, water, etc.), the packaging sleeve is generally first transported to a filling apparatus, then a plurality of processing steps such as activation folding are performed on the packaging sleeve in the filling apparatus to form a packaging container, then the liquid food is filled into the packaging container, and finally sealed to form a final product. SUMMARY
[0005] According to embodiments of the present application, a method and apparatus for manufacturing a packaging sleeve, a method and system for manufacturing a package are provided.
[0006] According to a first aspect of the present application, a method for manufacturing a packaging sleeve is provided, comprising: folding a packaging laminate having a crease pattern, wherein the crease pattern comprises at least one longitudinal crease line extending along a longitudinal direction, the longitudinal crease line comprises a lenticular crease line, the lenticular crease line comprises two curved crease lines arranged in pairs; and joining two ends of the packaging laminate to form the packaging sleeve; wherein the folding the packaging laminate having the crease pattern comprises: folding the packaging laminate along the two curved crease lines respectively.
[0007] In at least some embodiments, the folding the packaging laminate along the two curved crease lines respectively comprises: folding the packaging laminate along one of the two curved crease lines; and folding the packaging laminate along the other curved crease line.
[0008] In at least some embodiments, each of the curved crease lines comprises a straight line segment extending along the longitudinal direction; and the folding the packaging laminate along the two curved crease lines respectively comprises: folding the packaging laminate along the straight line segment of one of the curved crease lines; and folding the packaging laminate along the straight line segment of the other curved crease line.
[0009] In at least some embodiments, when the packaging composite sheet is folded along one of the curved crease lines, a minimum included angle of the portion of the packaging composite sheet being bent is defined as angle a; when the packaging composite sheet is folded along the other curved crease line, a minimum included angle of the portion of the packaging composite sheet being bent is defined as angle b; wherein the angle a and the angle b are not equal.
[0010] In at least some embodiments, the crease pattern includes two longitudinal crease lines spaced apart in the transverse direction, each of the longitudinal crease lines including the lenticular crease line; and the folding the packaging composite sheet having the crease pattern includes folding the packaging composite sheet along two curved crease lines of each of the lenticular crease lines, respectively.
[0011] In at least some embodiments, the two longitudinal crease lines include a first longitudinal crease line including a first lenticular crease line including a pair of two curved crease lines, and a second longitudinal crease line including a second lenticular crease line including another pair of two curved crease lines; and the folding the packaging composite sheet along two curved crease lines of each of the lenticular crease lines, respectively, includes simultaneously folding the packaging composite sheet along one of the two curved crease lines of the first lenticular crease line and one of the other two curved crease lines of the second lenticular crease line, respectively, and simultaneously folding the packaging composite sheet along the other of the two curved crease lines of the first lenticular crease line and the other of the other two curved crease lines of the second lenticular crease line, respectively.
[0012] In at least some embodiments, the two curved crease lines of the first lenticular crease line include a first curved crease line and a second curved crease line arranged in pairs; and the other two curved crease lines of the second lenticular crease line include a third curved crease line and a fourth curved crease line arranged in pairs; in the transverse direction, the second curved crease line and the third curved crease line are both located between the first curved crease line and the fourth curved crease line; and the simultaneously folding the packaging composite sheet along one of the two curved crease lines of the first lenticular crease line and one of the other two curved crease lines of the second lenticular crease line, respectively, includes simultaneously folding the packaging composite sheet along the second curved crease line and the third curved crease line, respectively; and the simultaneously folding the packaging composite sheet along the other of the two curved crease lines of the first lenticular crease line and the other of the other two curved crease lines of the second lenticular crease line, respectively, includes simultaneously folding the packaging composite sheet along the first curved crease line and the fourth curved crease line, respectively.
[0013] In at least some embodiments, when the packaging composite sheet is folded along the first curved crease line, the second curved crease line, the third curved crease line, and the fourth curved crease line respectively, a minimum included angle defined by the bent part of the packaging composite sheet is a first angle, a second angle, a third angle, and a fourth angle respectively; wherein the first angle, the second angle, the third angle, and the fourth angle are in a range of: a1 is greater than or equal to 110° and less than or equal to 135°; a2 is greater than or equal to 110° and less than or equal to 135°; a3 is greater than or equal to 110° and less than or equal to 157°; a4 is greater than or equal to 110° and less than or equal to 157°.
[0014] According to a second aspect of the present application, there is provided a manufacturing apparatus of a packaging sleeve, comprising: a pre-folding device configured to fold a packaging composite sheet having a crease pattern, wherein the crease pattern comprises at least one longitudinal crease line extending along a longitudinal direction, the longitudinal crease line comprises a lenticular crease line, and the lenticular crease line comprises a pair of curved crease lines; a forming device configured to join two ends of the packaging composite sheet to form the packaging sleeve; wherein the pre-folding device is further configured to fold the packaging composite sheet along the pair of curved crease lines respectively.
[0015] In at least some embodiments, the pre-folding device is further configured to fold the packaging composite sheet along one of the pair of curved crease lines and fold the packaging composite sheet along the other of the pair of curved crease lines.
[0016] In at least some embodiments, the crease pattern comprises two longitudinal crease lines spaced apart in a transverse direction, each of the longitudinal crease lines comprises the lenticular crease line; and the pre-folding device is further configured to fold the packaging composite sheet along the pair of curved crease lines of each of the lenticular crease lines respectively.
[0017] In at least some embodiments, the two longitudinal crease lines comprise: a first longitudinal crease line comprising a first lenticular crease line, the first lenticular crease line comprising a pair of curved crease lines; and a second longitudinal crease line comprising a second lenticular crease line, the second lenticular crease line comprising another pair of curved crease lines; wherein the pre-folding device is further configured to fold the packaging composite sheet along one of the pair of curved crease lines of the first lenticular crease line and along one of the other pair of curved crease lines of the second lenticular crease line simultaneously; and fold the packaging composite sheet along the other of the pair of curved crease lines of the first lenticular crease line and along the other of the other pair of curved crease lines of the second lenticular crease line simultaneously respectively.
[0018] According to a third aspect of the present application, there is provided a method of manufacturing a package using a packaging sleeve, wherein the packaging sleeve is manufactured according to the aforementioned method of manufacturing, the method of manufacturing a package comprising: conveying the packaging sleeve to an unfolding station, wherein the packaging sleeve is in a flat state; unfolding the flat packaging sleeve at the unfolding station into a tubular packaging sleeve so as to fit the tubular packaging sleeve onto a rotatable device of a filling apparatus; wherein the flat packaging sleeve is not folded again along the crease pattern before the packaging sleeve is conveyed to the unfolding station.
[0019] In at least some embodiments, the flat packaging sleeve is not folded again along the two curved crease lines of the longitudinal crease lines before the packaging sleeve is conveyed to the unfolding station.
[0020] According to a fourth aspect of the present application, there is provided a system comprising: a manufacturing apparatus of a packaging sleeve according to the aforementioned, configured to manufacture the packaging sleeve; and a filling apparatus, the filling apparatus comprising: an unfolding device, a sealing device and a filling device, wherein the unfolding device is configured to unfold a flat packaging sleeve into a tubular packaging sleeve, the tubular packaging sleeve comprising two opposite open ends; the sealing device comprises a first sealing mechanism, the first sealing mechanism being configured to seal one of the open ends to form a container; the filling device comprises a filling mechanism and a second sealing mechanism, the filling mechanism being configured to fill the container with a content via the other open end; the second sealing device being configured to seal the other open end.
[0021] In at least some embodiments, the pre-folding device is further configured to fold the packaging composite along one of the two curved crease lines and to fold the packaging composite along the other curved crease line.
[0022] In at least some embodiments, the crease pattern comprises two longitudinal crease lines, the two longitudinal crease lines being spaced apart in the transverse direction, each of the longitudinal crease lines comprising the lenticular crease line;
[0023] The pre-folding device is further configured to fold the packaging composite along the two curved crease lines of each of the lenticular crease lines, respectively.
[0024] In at least some embodiments, the two longitudinal crease lines include: a first longitudinal crease line including a first lenticular crease line including a pair of two curved crease lines; and a second longitudinal crease line including a second lenticular crease line including a pair of other two curved crease lines; wherein the pre-folding device is further configured to simultaneously fold the packaging composite sheet along one of the two curved crease lines of the first lenticular crease line and along one of the other two curved crease lines of the second lenticular crease line, respectively; and simultaneously fold the packaging composite sheet along the other of the two curved crease lines of the first lenticular crease line and along the other of the other two curved crease lines of the second lenticular crease line, respectively. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings of the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only related to some embodiments of the present application and are not a limitation on the present application.
[0026] FIG. 1 is a simplified flowchart of a packaging manufacturing method;
[0027] FIG. 2 is a plan view of a packaging composite sheet of the present application;
[0028] FIG. 3 is a structural view of a packaging sleeve of the present application;
[0029] FIG. 4 is a cross-sectional view of a packaging sleeve during a reversing process of the packaging sleeve of the present application;
[0030] FIG. 5 is a structural view of a packaging of the present application;
[0031] FIG. 6 is a plan view of two straight crease lines of a lenticular crease line of the present application;
[0032] FIG. 7 is a photograph of a reversing process of a packaging sleeve using the manufacturing method of FIG. 1 of the present application;
[0033] FIG. 8 is a photograph of a final packaging product obtained using the manufacturing method of FIG. 1 of the present application;
[0034] FIG. 9 is a flowchart of a manufacturing method of a packaging sleeve of an embodiment of the present application;
[0035] FIG. 10 is a plan view of a packaging sheet of an embodiment of the present application;
[0036] FIG. 11 is a cross-sectional view of a packaging composite sheet of an embodiment of the present application when folded along a first curved crease line and a second curved crease line;
[0037] Figure 12A is a schematic cross-sectional view of a packaging composite sheet of an embodiment of the present application when folded along the second and third curved crease lines;
[0038] Figure 12B is a schematic cross-sectional view of a packaging composite sheet of an embodiment of the present application when folded along the first and fourth curved crease lines;
[0039] Figure 13 is a flowchart of a method of manufacturing a packaging of an embodiment of the present application;
[0040] Figure 14 is a photograph of a packaging obtained using a method of manufacturing a packaging of an embodiment of the present application;
[0041] Figure 15 is a block diagram of a manufacturing apparatus of a packaging sleeve of an embodiment of the present application;
[0042] Figure 16 is a block diagram of a system of an embodiment of the present application;
[0043] Figure 17 is a schematic structural view of a filling apparatus of an embodiment of the present application. DETAILED DESCRIPTION
[0044] In order to make the objects, technical solutions, and advantages of embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to briefly describe the technical solutions of the embodiments of the present application in a clear and complete manner. Obviously, the described embodiments are only a part of embodiments of the present application, rather than all embodiments of the present application. Based upon the described embodiments of the present application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts should fall within the scope of the present application.
[0045] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms as used in the specification and claims of this application do not necessarily mean any order, number, or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the components or objects appearing before the terms "include" or "contain" cover the components or objects listed after the terms "include" or "contain" and their equivalents, and do not exclude other components or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "upper", "lower", "left", "right", and the like are only used to indicate relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships can also be changed accordingly.
[0046] Figure 1 is a simplified flowchart of a packaging manufacturing method. Figure 2 is a plan view of a packaging laminate of the present application. Figure 3 is a schematic view of a packaging sleeve of the present application. Figure 4 is a schematic view of a cross-section of the packaging sleeve during a reversing process of the packaging sleeve of the present application. Figure 5 is a schematic view of a packaging of the present application.
[0047] For example, the packaging C of Figure 5 contains a filling such as a liquid and has a lenticular gripping area Cl designed on the outer surface of the packaging C, which is both aesthetically pleasing and convenient for the consumer to grip the product. Typically, the packaging C is manufactured by first producing a packaging sleeve S of Figure 3 using the packaging laminate P of Figure 2 and then using the packaging sleeve S to manufacture the final product packaging C.
[0048] For example, as shown in Figure 1, a conventional packaging C manufacturing method can include:
[0049] Step S1 : folding the packaging laminate P along the dashed lines Al, A2, A3, A4 of Figure 2, respectively;
[0050] Step S2: forming the packaging laminate P into a packaging sleeve S;
[0051] Step S3: reversing the packaging sleeve S;
[0052] Step S4: sealing one end opening of the reversed packaging sleeve S to form a container;
[0053] Step S5: filling the container with a content and sealing the other end opening of the packaging sleeve S.
[0054] Figure 6 is a plan view of two straight crease lines of a lenticular crease line of the present application. As shown in Figure 6, the packaging laminate P has a crease pattern 1 including at least one longitudinal crease line extending in the longitudinal direction (y direction shown in the figure), for example, two longitudinal crease lines 11, 12 and two longitudinal crease lines 21, 22. The two longitudinal crease lines 11, 12 have the same crease and each include a lenticular crease line 110, 120 for forming a longitudinal side C10 of the packaging C containing a lenticular gripping area Cl. The two longitudinal crease lines 21, 22 have the same crease and each include a straight crease line (i.e., a straight line extending through the packaging laminate in the y direction in Figure 6) for forming a longitudinal side C20 of the packaging C not containing a lenticular gripping area.
[0055] When folding along the dashed lines A1, A3, the package composite sheet P is bent to a certain angle along each longitudinal crease line 21, 22 due to the fact that the dashed lines A1, A3 coincide with the two longitudinal crease lines 21, 22 respectively, which is beneficial to the formation of the two longitudinal side edges C20 of the subsequent package C. When folding along the dashed lines A2, A4, the dashed line A2 coincides with the first straight crease line L1 and the second straight crease line L2 respectively, which are located on the upper and lower sides of the lenticular crease line 110, at this time, the package composite sheet P is bent to a certain angle along the first straight crease line L1 and the second straight crease line L2 respectively; the dashed line A4 coincides with the third straight crease line L3 and the fourth straight crease line L4 respectively, which are located on the upper and lower sides of the lenticular crease line 120 (as shown in FIG. 6), at this time, the package composite sheet P is bent to a certain angle along the third straight crease line L3 and the fourth straight crease line L4 respectively. That is, when folding along the dashed lines A2 and A4, no folding is performed along the lenticular edges.
[0056] In step S2, the two opposite end portions P1, P2 of the package sheet P are joined to each other (for example, by means of adhesion) to form the two-end-opened package sleeve S of FIG. 3. For example, the package sleeve S is approximately flat and includes opposite top open end E1 and bottom open end E2.
[0057] In step S3, the package sleeve S is reversed. In order to facilitate subsequent filling of the content into the package sleeve, the package sleeve S is unfolded from flat to a sleeve-like tube shape. The reversing function is to fold the four side edges of the package sleeve S again, so as to achieve the expected tube shape when the package sleeve S is unfolded, and make the final package C angular (especially the longitudinal side edges C10, C20) and more beautiful in appearance. The reversing process can be seen in FIG. 4. For example, in the (a) initial state, the package sleeve S is approximately flat and includes the longitudinal joint C30; in the (b) first reversed state, the package sleeve S becomes a tube shape and the longitudinal crease lines 21, 22 are reversed; in the (c) state, the package sleeve S returns to flat; in the (d) second reversed state, the package sleeve S becomes a tube shape again and the longitudinal crease lines 11, 12 are reversed.
[0058] FIG. 7 is a photograph of the reversing of the package sleeve using the manufacturing method of FIG. 1. FIG. 8 is a photograph of the final package product obtained using the manufacturing method of FIG. 1. In FIG. 7, the samples shown in (a) to (f) all have different degrees of skewed wrinkles on the surface of the package sleeve, and the positions of these wrinkles are not the positions of the crease lines possessed by the sheet itself. It is further found that the existence of these wrinkles leads to poor forming effect of the lenticular gripping area in the finished product of FIG. 8, reduces the beauty of the package, and makes the scrap rate of the finished product higher. Moreover, the longer the length of the lenticular gripping area is, the more obvious the above phenomenon is.
[0059] The inventors have further analyzed that one of the reasons for the above problems is that the longitudinal crease line 11 (the same applies to the longitudinal crease line 12) is only folded once (referred to as "one-step pre-folding") in step S1, i.e., the one-step folding is performed on the longitudinal crease line 11 along the dashed line A2. Since the dashed line A2 is located on the central axis of the lobe crease line 110, and is not folded along the two curved edges of the lobe crease line 110, the folding effect of step S1 on the lobe crease line 110 is very small. The second reason is that the longitudinal crease line 11 is still folded along the dashed line A2 when it is folded in step S3. Therefore, the folding in step S3 not only does not improve the unsatisfactory folding result of the longitudinal crease line 11 in step S1, but also causes the poor forming effect of the lobe-shaped gripping area C1 on the package C.
[0060] To solve the problem of poor folding effect of the lobe crease line, the embodiments of the present application provide a method for manufacturing a packaging sleeve S. For example, FIG. 9 is a flowchart of a method for manufacturing a packaging sleeve according to an embodiment of the present application. The method includes the following steps:
[0061] Step S100: folding a packaging composite sheet P having a crease pattern 1, wherein the crease pattern 1 includes at least one longitudinal crease line extending along a longitudinal direction, and the longitudinal crease line includes a lobe crease line including a pair of curved crease lines, wherein folding the packaging composite sheet P having the crease pattern 1 includes: folding the packaging composite sheet P along the two curved crease lines, respectively; and
[0062] Step S200: joining the two ends of the packaging composite sheet P to form a packaging sleeve S.
[0063] The manufacturing method according to the above embodiments of the present application includes folding the packaging composite sheet P along the two curved crease lines of the lobe crease line (referred to as "two-step pre-folding"), so as to improve the folding effect of the lobe crease line and facilitate improving the forming effect of the lobe-shaped gripping area C1 on the final package C.
[0064] In the embodiments of the present application, the packaging composite sheet P includes a laminated multi-layer structure. For example, the multi-layer structure includes, in order from an outer surface (i.e., a surface facing the outside of the package C) to an inner surface (i.e., a surface facing the inside of the package C), an outer cover layer, a barrier layer, a carrier layer, and an inner cover layer, etc., wherein the main components of the outer cover layer and the inner cover layer include polyethylene. The barrier layer includes a barrier material, which can be used for water blocking, oxygen blocking, and light shielding. The carrier layer includes, for example, a paper layer. The embodiments of the present application do not limit the specific structure of the packaging composite sheet P.
[0065] Figure 10 is a plan view of a packaging sheet according to an embodiment of the present application. As shown in Figure 10, the packaging composite sheet P comprises a crease pattern 1, which comprises two longitudinal crease lines extending along the y direction, i.e. a first longitudinal crease line 11 and a second longitudinal crease line 12. The first longitudinal crease line 11 and the second longitudinal crease line 12 can have the same size and shape, or can have different sizes and shapes. When the first longitudinal crease line 11 and the second longitudinal crease line 12 have the same size and shape, it is advantageous to simplify the manufacturing process. Embodiments of the present application are described by taking the first longitudinal crease line 11 and the second longitudinal crease line 12 as an example.
[0066] For example, the first longitudinal crease line 11 comprises a first lenticular crease line 110, which comprises two curved crease lines arranged in pairs, i.e. a first curved crease line 111 and a second curved crease line 112. The second longitudinal crease line 12 comprises a second lenticular crease line 120, which comprises two curved crease lines arranged in pairs, i.e. a third curved crease line 113 and a fourth curved crease line 114. The folding process of embodiments of the present application is described below by taking the first lenticular crease line 110 as an example.
[0067] For example, the step S100 comprises folding the packaging composite sheet P along the first curved crease line 111 and the second curved crease line 112, respectively, comprising:
[0068] The step S101 comprises folding the packaging composite sheet P along one of the first curved crease line 111 and the second curved crease line 112, e.g. along the first curved crease line 111; and
[0069] The step S102 comprises folding the packaging composite sheet P along the other of the first curved crease line 111 and the second curved crease line 112, e.g. along the second curved crease line 112.
[0070] In embodiments of the present application, by folding the packaging composite sheet P along the first curved crease line 111 and the second curved crease line 112 respectively, the folding of the curved edge of the first lenticular crease line 110 can be further ensured, and the forming effect of the first lenticular crease line 110 can be improved.
[0071] The term “folding” herein refers to bending the packaging composite sheet P, for example, bending a sheet-type packaging composite sheet P into two parts with an included angle, wherein the included angle is greater than zero degrees and less than or equal to 180 degrees, further, the included angle is greater than or equal to 90 degrees and less than or equal to 180 degrees, and further, the included angle is greater than or equal to 120 degrees and less than 160 degrees.
[0072] For example, as shown in FIG. 10, the first curved crease line 111 comprises a straight line segment ST1 extending along the y direction, and the second curved crease line 112 comprises a straight line segment ST2 extending along the y direction. Further, for example, folding the packaging composite sheet P along the first curved crease line 111 and the second curved crease line 112 respectively comprises:
[0073] S111: folding the packaging composite sheet P along a straight line segment of one of the first curved crease line 111 and the second curved crease line 112 (for example, the straight line segment ST1 along the first curved crease line 111); and,
[0074] S112: folding the packaging composite sheet P along a straight line segment of the other of the first curved crease line 111 and the second curved crease line 112 (for example, the straight line segment ST2 along the second curved crease line 112).
[0075] In the embodiment of the present application, the first lenticular crease line 110 has a shape of middle thick and two ends sharp, and since the area of the middle part of the first lenticular crease line 110 is greater than the sum of the areas of the two sharp parts on both sides of the middle part, when the packaging composite sheet P is folded along the first curved crease line 111 and the second curved crease line 112 respectively, folding along the straight line segments ST1 and ST2 respectively (i.e. folding along the straight lines B1 and B2 shown in FIG. 10) can further ensure the overall forming effect of the first lenticular crease line 110.
[0076] FIG. 11 is a schematic view of a cross section of the packaging composite sheet in the embodiment of the present application when folded along the first curved crease line and the second curved crease line. As shown in FIG. 11, when the packaging composite sheet P is folded along the first curved crease line 111, the minimum included angle of the part of the packaging composite sheet P being bent is angle a; when the packaging composite sheet P is folded along the second curved crease line, the minimum included angle of the part of the packaging composite sheet P being bent is angle b, and angle a and angle b are not equal. In actual production, the packaging composite sheet P is conveyed by a conveying device (for example, a conveying belt). During the conveying process, the packaging composite sheet can be pre-folded by applying pressure in different directions (for example, forces F1 and F2 shown in the figure) to the packaging composite sheet P while the packaging composite sheet is being conveyed. Since the lengths of the parts being bent are different, angle a is less than angle b, or angle a is greater than angle b. Those skilled in the art can set the above angles a and b according to actual process conditions or requirements, and the present application does not limit this.
[0077] For example, the first longitudinal crease line 11 and the second longitudinal crease line 12 are arranged at intervals in the transverse direction (for example, the x direction shown in the drawing). As shown in FIG. 10, the packaging composite sheet P includes, in order from left to right in the x direction, a third longitudinal crease line 21, the first longitudinal crease line 11, a fourth longitudinal crease line 22, and the second longitudinal crease line 12. The fourth longitudinal crease line 22 is located between the first longitudinal crease line 11 and the second longitudinal crease line 12 to separate them. The third longitudinal crease line 21 and the fourth longitudinal crease line 22 are straight crease lines, and do not have a louver crease line. Therefore, on the final product, the two louver-shaped gripping areas are arranged diagonally.
[0078] For example, in the case where the crease pattern 1 has the first longitudinal crease line 11 and the second longitudinal crease line 12, in the step S100 described above, the packaging composite sheet P having the crease pattern 1 is folded, including:
[0079] The step S121 includes folding the packaging composite sheet P along each of the two curved crease lines of the first longitudinal crease line 11 and the second longitudinal crease line 12, respectively. In this way, the forming effect of the two louver-shaped gripping areas can be improved, and the overall appearance of the package can be further improved.
[0080] For example, the first longitudinal crease line 11 includes a first louver crease line 110 including a pair of first curved crease line 111 and second curved crease line 112, and the second longitudinal crease line 12 includes a second louver crease line 120 including a pair of third curved crease line 113 and fourth curved crease line 114, in which case the step S121 described above includes:
[0081] The step S1211 includes simultaneously folding the packaging composite sheet P along one of the first curved crease line 111 and the second curved crease line 112 of the first louver crease line 110 and along one of the third curved crease line 113 and the fourth curved crease line 114 of the second louver crease line 120, respectively; and
[0082] The step S1212 includes simultaneously folding the packaging composite sheet P along the other of the first curved crease line 111 and the second curved crease line 112 of the first louver crease line 110 and along the other of the third curved crease line 113 and the fourth curved crease line 114 of the second louver crease line 120, respectively.
[0083] FIG. 12A is a cross-sectional view of the packaging composite sheet of the embodiment of the present application when folded along the second curved crease line and the third curved crease line. FIG. 12B is a cross-sectional view of the packaging composite sheet of the embodiment of the present application when folded along the first curved crease line and the fourth curved crease line.
[0084] For example, as shown in FIG. 10, the second curved crease line 112 and the third curved crease line 113 are located between the first curved crease line 111 and the fourth curved crease line 114. That is, the first curved crease line 111 and the fourth curved crease line 114 are respectively located at the outermost side of the four curved crease lines 111-114.
[0085] For example, as shown in FIG. 12A, the packaging composite sheet P is folded along the two curved crease lines (i.e., the second curved crease line 112 and the third curved crease line 113) at the innermost side of the four curved crease lines 111-114 at the same time. Compared with folding the second curved crease line 112 and the third curved crease line 113 respectively in two steps, the folding efficiency can be improved and the folding time can be reduced by folding the second curved crease line 112 and the third curved crease line 113 at the same time in one step.
[0086] For example, as shown in FIG. 12B, the packaging composite sheet P is folded along the two curved crease lines (i.e., the first curved crease line 111 and the fourth curved crease line 114) at the outermost side of the four curved crease lines 111-114 at the same time. Compared with folding the first curved crease line 111 and the fourth curved crease line 114 respectively in two steps, the folding efficiency can be improved and the folding time can be reduced by folding the first curved crease line 111 and the fourth curved crease line 114 at the same time in one step.
[0087] For example, when the packaging composite sheet P is folded along the first curved crease line 111, the second curved crease line 112, the third curved crease line 113, and the fourth curved crease line 114 respectively, the minimum included angles of the portions of the packaging composite sheet P that are folded are respectively the first angle a1, the second angle a2, the third angle a3, and the fourth angle a4; wherein the numerical ranges of the first angle a1, the second angle a2, the third angle a3, and the fourth angle a4 are as follows: a1 is greater than or equal to 110° and less than or equal to 135°, further, a1 is greater than or equal to 120° and less than or equal to 125°. a2 is greater than or equal to 110° and less than or equal to 135°, further, a2 is greater than or equal to 120° and less than or equal to 125°. a3 is greater than or equal to 110° and less than or equal to 157°, further, a3 is greater than or equal to 120° and less than or equal to 147°. a4 is greater than or equal to 110° and less than or equal to 157°, further, a4 is greater than or equal to 120° and less than or equal to 147°. By setting the above parameters, the folding effect of the packaging composite sheet can be further improved.
[0088] Referring to FIG. 10, for example, folding the packaging composite sheet having the crease pattern 1 includes pre-folding the packaging sheet P along the dashed lines B1, B2, B3, B4, B5, B6 shown in FIG. 10, respectively. Compared to the dashed lines A1, A2, A3, A4 shown in FIG. 2, the embodiment of the present application replaces the dashed lines A2 with the dashed lines B2, B3, and replaces A4 with B5, B6, thereby improving the folding effect of the two lobe-shaped crease lines 110, 120.
[0089] The embodiment of the present application also provides a method for manufacturing a packaging C using a packaging sleeve S, wherein the packaging sleeve S can be manufactured according to the manufacturing method of any of the preceding embodiments. FIG. 13 is a flowchart of the manufacturing method of the packaging according to the embodiment of the present application. As shown in FIG. 13, the manufacturing method includes:
[0090] Step S301: conveying the packaging sleeve S to an unfolding station, wherein the packaging sleeve S is in a flat state; and
[0091] Step S302: unfolding the flat packaging sleeve S on the unfolding station into a tubular packaging sleeve S, so as to fit the tubular packaging sleeve S on a rotatable device 302 (to be described in detail later) of a filling device 300, wherein the flat packaging sleeve S is not folded again along the crease pattern 1 before being conveyed to the unfolding station.
[0092] In the embodiment of the present application, the term "unfolding" refers to unfolding or expanding the flat packaging sleeve into a sleeve-like tubular packaging sleeve, wherein the cross section of the flat packaging sleeve perpendicular to its extending direction is, for example, a rhombus, and the cross section of the tubular packaging sleeve perpendicular to its extending direction is, for example, a rectangle or a square.
[0093] Returning to FIG. 1, in the manufacturing method of the prior packaging, the packaging sleeve S undergoes the reverse folding process shown in FIG. 4 (i.e., step S3 of FIG. 1) before being filled with the content, so as to improve the forming effect of the gripping area. This reverse folding step is usually performed before the packaging sleeve S reaches the unfolding station.
[0094] However, in the manufacturing method of the packaging according to the embodiment of the present application, when the packaging sleeve S obtained by the method of the preceding embodiment of the present application is used to manufacture the packaging C, the above step S3 can be omitted, because the embodiment of the present application has already folded the lobe-shaped crease lines by the "two-step pre-folding" method when pre-folding the packaging composite sheet. Compared to the previously used "one-step pre-folding" method, the forming effect of the subsequent lobe-shaped gripping area is improved.
[0095] In addition, since the forming effect of the gripping area is improved in the manufacturing process of the packaging sleeve, in the method for manufacturing the packaging, the packaging sleeve is no longer folded back, so that the folding problem can be avoided under the premise of ensuring the forming effect of the final product, and the manufacturing process is simplified, the process steps are reduced, and the labor and material costs are saved.
[0096] For example, before the packaging sleeve S is transported to the unfolding station, the flat packaging sleeve S is not folded again along the first curved crease line 111 and the second curved crease line 112 of the first longitudinal crease line 11, and the flat packaging sleeve S is not folded again along the third curved crease line 113 and the fourth curved crease line 114 of the second longitudinal crease line 12.
[0097] If only the folding back step 3 in FIG. 1 is cancelled, and other steps remain unchanged, although the folding problem in FIG. 7 is solved, the forming of the lily-shaped side is poor, so that the lily-shaped side cannot be arranged at a predetermined angle with respect to two adjacent packaging sides, but is flush with one of the sides or tends to be flush with one of the sides, and the forming failure rate is significantly increased. In the embodiment of the present application, when the packaging sleeve obtained by the manufacturing method of the foregoing embodiment is used to manufacture the packaging, the folding problem can be solved under the premise of ensuring that the lily-shaped gripping area has a good forming effect.
[0098] FIG. 14 is a photo of the packaging obtained by using the manufacturing method of the packaging of the embodiment of the present application. As can be seen from FIG. 14, the two edges 1A and 1B of the lily-shaped gripping area on the left packaging product are clear and distinct, and the two edges 2A and 2B of the lily-shaped gripping area on the right packaging product are also clear and distinct.
[0099] Generally, the packaging product has various capacities to accommodate different volumes of contents, and is more flexible to adapt to market demand. The lengths (i.e., the lengths in the vertical direction) of the lily-shaped gripping areas of packaging products of different capacities are also different. The forming effects of the lily-shaped gripping areas of packaging products of two typical capacities are also compared in the present application, and specific values are shown in Table 1 below.
[0100] Table 1
[0101] As can be seen from Table 1, the larger the capacity of the packaging, the higher the length ratio of the lily-shaped gripping area, and the higher the forming failure rate. In particular, for the packaging of 350 ml capacity, the forming failure rate of the finished product obtained by one-step pre-folding is as high as 41%.
[0102] However, after the packaging of 350 ml capacity is manufactured by using the manufacturing method of the embodiment of the present application, the forming failure rate is reduced to 0.8%, which proves that the packaging sleeve and the manufacturing method of the packaging provided by the embodiment of the present application are feasible and suitable for mass production.
[0103] The embodiment of the present application also provides a manufacturing device of the packaging sleeve S. FIG. 15 is a block diagram of the manufacturing device of the packaging sleeve according to the embodiment of the present application. For example, the manufacturing device 200 adopts the manufacturing method of the packaging sleeve S described in the foregoing embodiment. As shown in FIG. 15, the manufacturing device 200 includes a pre-folding device 201 and a forming device 202. The pre-folding device 201 is configured to fold the packaging composite sheet P having the crease pattern 1, wherein the crease pattern 1 includes at least one longitudinal crease line extending along the longitudinal direction, and the longitudinal crease line includes the linden crease line including the two curved crease lines arranged in pairs. The forming device 202 is configured to join the two ends of the packaging composite sheet P to form the packaging sleeve S; wherein the pre-folding device 201 is further configured to fold the packaging composite sheet P along the two curved crease lines, respectively.
[0104] In the manufacturing device of the embodiment of the present application, the pre-folding device 201 is configured to fold the packaging composite sheet P along the two curved crease lines of the linden crease line, respectively, so as to improve the folding effect of the linden crease line and facilitate the forming effect of the linden-shaped gripping area C1 on the final packaging C.
[0105] For example, referring to FIG. 10, the crease pattern 1 includes a first longitudinal crease line 11 and a second longitudinal crease line 12. The first longitudinal crease line 11 includes a first linden crease line 110 including two curved crease lines arranged in pairs, i.e., a first curved crease line 111 and a second curved crease line 112. The second longitudinal crease line 12 includes a second linden crease line 120 including two curved crease lines arranged in pairs, i.e., a third curved crease line 113 and a fourth curved crease line 114.
[0106] For example, the pre-folding device 201 is further configured to fold the packaging composite sheet P along one of the two curved crease lines and fold the packaging composite sheet P along the other curved crease line. Taking the first linden crease line 110 as an example. As shown in FIG. 10, for example, the pre-folding device 201 is configured to fold the packaging composite sheet P along the first curved crease line 111 and fold the packaging composite sheet P along the second curved crease line 112. In this way, the folding effect of the first linden crease line 110 can be further improved.
[0107] For example, the pre-folding device 201 is further configured to fold the packaging composite sheet P along one of the first curved crease line 111 and the second curved crease line 112 of the first lenticular crease line 110 and along one of the third curved crease line 113 and the fourth curved crease line 114 of the second lenticular crease line 120 simultaneously, and fold the packaging composite sheet P along the other of the first curved crease line 111 and the second curved crease line 112 of the first lenticular crease line 110 and along the other of the third curved crease line 113 and the fourth curved crease line 114 of the second lenticular crease line 120 simultaneously.
[0108] As shown in FIG. 10, for example, the packaging composite sheet P is folded along the outermost two curved crease lines (i.e., the first curved crease line 111 and the fourth curved crease line 114) of the four curved crease lines 111-114 simultaneously. Compared with folding the first curved crease line 111 and the fourth curved crease line 114 in two steps respectively, the folding efficiency can be improved and the folding time can be reduced by folding the first curved crease line 111 and the fourth curved crease line 114 simultaneously in one step.
[0109] As shown in FIG. 10, for example, the packaging composite sheet P is folded along the innermost two curved crease lines (i.e., the second curved crease line 112 and the third curved crease line 113) of the four curved crease lines 111-114 simultaneously. Compared with folding the second curved crease line 112 and the third curved crease line 113 in two steps respectively, the folding efficiency can be improved and the folding time can be reduced by folding the second curved crease line 112 and the third curved crease line 113 simultaneously in one step.
[0110] The embodiment of the present application also provides a system for manufacturing a package. FIG. 16 is a block diagram of the system of the embodiment of the present application. FIG. 17 is a structural schematic diagram of a filling device of the embodiment of the present application. As shown in FIG. 16 and FIG. 17, the system 1000 includes a manufacturing device 200 for manufacturing a packaging sleeve S and a filling device 300. The packaging sleeve S manufactured by the manufacturing device 200 is transferred to the downstream filling device 300.
[0111] For example, the filling device 300 includes an unfolding device 31, a rotatable device 32 with a forming rod 321, a sealing device 33, and a filling device 34. For example, the sealing device 33 includes a heating mechanism 331, a gable pressing mechanism 332, and a corner rolling mechanism 333. For another example, the filling device 34 includes a flushing mechanism 340, a filling mechanism 341, and a second sealing mechanism 342.
[0112] For example, a plurality of flat packaging sleeves S are conveyed in a stacking direction to a deployment station of a corresponding deployment device 31. The deployment device 31 comprises a suction cup 310 configured to deploy the flat packaging sleeve S into a tubular packaging sleeve S so as to fit the tubular packaging sleeve S over a forming rod 320 of a rotatable device 32, wherein the tubular packaging sleeve S comprises two opposite open ends (e.g. a top open end E1 and a bottom open end E2 of Fig. 3). Thereafter, the tubular packaging sleeve S is fitted over the forming rod 320 of the rotatable device 32. As shown in Fig. 5, the top open end E1 is used to form a gable region C50 of the package C and the bottom open end E2 is used to form a bottom region of the package C.
[0113] For example, the rotatable device 32 rotates in a counter-clockwise direction and comprises a plurality of forming rods 320, each of which is fitted with a tubular packaging sleeve S. As the rotatable device 32 rotates, the forming rods 320 bring the tubular packaging sleeves S to a plurality of different positions (e.g. positions I to IX in the figures) to perform different processings on the packaging sleeves S.
[0114] For example, at position I, a flow-directing component C40 such as a lid is pushed onto the forming rod 320. The rotatable device 32 rotates the forming rod 320 with the flow-directing component C40 to position II. At position II, the tubular packaging sleeve S is pushed onto the forming rod 320 over the flow-directing component C40 which is pushed and held on the forming rod 320. At position III, the gable region C50 of the packaging sleeve S and the flow-directing component C40 are activated using hot air. As shown in Fig. 17, a heating mechanism 331 can be provided at a region corresponding to position III. At position IV, the same processing as in position III is performed, and thus a region corresponding to position IV is also provided with a heating mechanism 331.
[0115] For example, the rotatable device 302 continues to rotate to position V, at which the gable region C50 is processed by a gable pressing mechanism 332. The gable pressing mechanism 332 presses the gable surface onto the flange of the flow-directing component C40 to seal the two together. After the gable region C50 is sealed with the flow-directing component C40, the top open end E1 is sealed and the packaging sleeve S forms a one-end closed container C’.
[0116] For example, the rotatable device 302 continues to rotate to position VI, at which the gable region C50 is heated using a heating device (not shown) for activating a protruding corner (or called a flap) on the gable surface. At position VII, the protruding corner is turned over by a corner pressing mechanism 333 and adhered to the gable surface, thereby bonding the corner to the gable surface.
[0117] After the above process is completed, the one-end closed container C' is transferred to the receiving bin 36 of the conveying device 35 at position VIII, at which time the bottom open end E2 of the container C' faces upward to facilitate subsequent processing thereof by the filling device.
[0118] For example, the filling device 34 can further include a first monitoring mechanism 343a and a second monitoring mechanism 343b. First, the container C' passes through the first monitoring mechanism 343a to check whether the position of the package C' in the receiving bin 36 of the conveying device 35 is correct. Then, in the area of the flushing mechanism 340, the container C' is subjected to sterile flushing by the flushing mechanism 340 to sterilize the interior of the package C'. Then, in the area of the filling mechanism 341, the container C' is filled with contents through the bottom open end E2 thereof by the filling mechanism 341. Next, in the area of the second closing mechanism 342, the bottom open end E2 of the package C' is closed. At this time, the package C that has been filled with contents and closed is formed, and then the package C passes through the second monitoring mechanism 342 to check the bottom area of the package C. Finally, the package C is removed from the receiving bin 36 in the right end area of the conveying device 35.
[0119] In the system of the above embodiment of the present application, since the manufacturing device 200 of the previous embodiment is used and the package sleeve S is manufactured by the manufacturing method of the previous embodiment, not only is the folding effect of the linden leaf-shaped fold line on the package improved, but also the process step of reverse folding is omitted, the forming effect of the linden leaf-shaped gripping area C1 on the final package C is improved, the manufacturing process is simplified, the process steps are reduced, and the labor and material costs are saved, under the premise of ensuring the forming effect of the linden leaf-shaped gripping area.
[0120] In the embodiment of the present application, the specific arrangement of the pre-folding device 201 and the forming device 202 in the manufacturing device 200 can be referred to the description of the previous embodiment, which will not be repeated here.
[0121] In this paper, the following points need attention:
[0122] (1) The drawings of the embodiment of the present application only relate to the structures involved in the embodiment of the present application, and other structures can be referred to the general design.
[0123] (2) In the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other to obtain new embodiments.
[0124] (3) The above is only an exemplary embodiment of the present application, not for limiting the protection scope of the present application, the protection scope of the present application is determined by the appended claims.
Claims
1. A method of manufacturing a packaging sleeve, comprising: folding a packaging composite sheet having a crease pattern, wherein the crease pattern comprises at least one longitudinal crease line extending in a longitudinal direction, the longitudinal crease line comprising a lenticular crease line, the lenticular crease line comprising two curved crease lines arranged in pairs; and joining two ends of the packaging composite sheet to form the packaging sleeve; wherein the folding the packaging composite sheet having the crease pattern comprises: folding the packaging composite sheet along the two curved crease lines respectively.
2. The manufacturing method according to claim 1, wherein, the folding the packaging composite sheet along the two curved crease lines respectively comprises: folding the packaging composite sheet along one of the two curved crease lines; and folding the packaging composite sheet along the other curved crease line.
3. The method of manufacturing according to claim 2, wherein each of the curved crease lines comprises a straight segment extending in the longitudinal direction; wherein the folding the packaging composite sheet along the two curved crease lines respectively comprises: folding the packaging composite sheet along the straight segment of one of the two curved crease lines; and folding the packaging composite sheet along the straight segment of the other curved crease line.
4. The method of manufacturing according to claim 2, wherein a minimum included angle of a portion of the packaging composite sheet being bent when folded along one of the two curved crease lines is defined as an angle a; a minimum included angle of a portion of the packaging composite sheet being bent when folded along the other curved crease line is defined as an angle b; wherein the angle a and the angle b are not equal.
5. The method of manufacturing according to any one of claims 1 to 4, wherein the crease pattern comprises two of the longitudinal crease lines, the two of the longitudinal crease lines being spaced apart in a transverse direction, each of the longitudinal crease lines comprising the lenticular crease line; the folding the packaging composite sheet having the crease pattern comprises: folding the packaging composite sheet along two curved crease lines of each of the lenticular crease lines respectively.
6. The method of manufacturing according to claim 5, wherein, the two of the longitudinal crease lines comprise: a first longitudinal crease line comprising a first lenticular crease line, the first lenticular crease line comprising two curved crease lines arranged in pairs; and a second longitudinal crease line comprising a second lenticular crease line, the second lenticular crease line comprising another two curved crease lines arranged in pairs; wherein the folding the packaging composite sheet along two curved crease lines of each of the lenticular crease lines respectively comprises: folding the packaging composite sheet along one of the two curved crease lines of the first lenticular crease line and along one of the other two curved crease lines of the second lenticular crease line simultaneously; and folding the packaging composite sheet along the other of the two curved crease lines of the first lenticular crease line and along the other of the other two curved crease lines of the second lenticular crease line simultaneously.
7. The method of manufacturing according to claim 6, wherein the two curved crease lines of the first lenticular crease line comprise a first curved crease line and a second curved crease line arranged in pairs; The other two curved crease lines of the second louver crease line include a third curved crease line and a fourth curved crease line arranged in pairs; in the transverse direction, the second curved crease line and the third curved crease line are both located between the first curved crease line and the fourth curved crease line; Wherein, simultaneously folding the packaging composite sheet along one of the two curved crease lines of the first louver crease line and one of the other two curved crease lines of the second louver crease line, respectively, includes: Simultaneously folding the packaging composite sheet along the second curved crease line and the third curved crease line, respectively; Wherein, simultaneously folding the packaging composite sheet along the other of the two curved crease lines of the first louver crease line and the other of the other two curved crease lines of the second louver crease line, respectively, includes: Simultaneously folding the packaging composite sheet along the first curved crease line and the fourth curved crease line, respectively.
8. The manufacturing method according to claim 7, wherein, When the packaging composite sheet is folded along the first curved crease line, the second curved crease line, the third curved crease line, and the fourth curved crease line, respectively, the minimum included angles of the portions of the packaging composite sheet being bent are defined as a first angle, a second angle, a third angle, and a fourth angle, respectively; Wherein, the numerical ranges of the first angle, the second angle, the third angle, and the fourth angle are as follows: α1 is greater than or equal to 110° and less than or equal to 135°; α2 is greater than or equal to 110° and less than or equal to 135°; α3 is greater than or equal to 110° and less than or equal to 157°; α4 is greater than or equal to 110° and less than or equal to 157°.
9. A manufacturing apparatus of a packaging sleeve, comprising: a pre-folding device configured to fold a packaging composite sheet having a crease pattern, wherein the crease pattern includes at least one longitudinal crease line extending in a longitudinal direction, the longitudinal crease line including a louver crease line, the louver crease line including two curved crease lines arranged in pairs; a forming device configured to join two ends of the packaging composite sheet to form the packaging sleeve; Wherein, the pre-folding device is further configured to fold the packaging composite sheet along the two curved crease lines, respectively.
10. The manufacturing apparatus of claim 9, wherein, The pre-folding device is further configured to fold the packaging composite sheet along one of the two curved crease lines and fold the packaging composite sheet along the other curved crease line.
11. The manufacturing apparatus according to claim 9 or 10, wherein, The crease pattern includes two longitudinal crease lines, the two longitudinal crease lines being arranged in pairs in the transverse direction, each of the longitudinal crease lines including the louver crease line; The pre-folding device is further configured to fold the packaging composite sheet along the two curved crease lines of each of the louver crease lines, respectively.
12. The manufacturing apparatus according to claim 11, wherein The two longitudinal crease lines include: a first longitudinal crease line including a first louver crease line, the first louver crease line including two curved crease lines arranged in pairs; and a second longitudinal crease line including a second louver crease line, the second louver crease line including two curved crease lines arranged in pairs. the second lenticular crease line comprises a pair of two further curved crease lines; wherein the pre-folding device is further configured to simultaneously fold the packaging composite along one of the two curved crease lines of the first lenticular crease line and along one of the two further curved crease lines of the second lenticular crease line; and to simultaneously fold the packaging composite along the other of the two curved crease lines of the first lenticular crease line and along the other of the two further curved crease lines of the second lenticular crease line.
13. A method of manufacturing a package using a packaging sleeve, wherein, The packaging sleeve is manufactured according to the manufacturing method of any one of claims 1 to 8, the method of manufacturing a packaging comprising: transporting the packaging sleeve to an unfolding station, wherein the packaging sleeve is in a flat state; unfolding the flat packaging sleeve at the unfolding station into a tubular packaging sleeve so as to fit the tubular packaging sleeve onto a rotatable device of a filling apparatus; wherein the flat packaging sleeve is not folded again along the crease pattern before being transported to the unfolding station.
14. The method of claim 13, wherein, The flat packaging sleeve is not folded again along the two curved crease lines of the longitudinal crease lines before being transported to the unfolding station.
15. A system comprising: a manufacturing apparatus of a packaging sleeve according to any one of claims 9 to 12, the manufacturing apparatus being configured to manufacture the packaging sleeve; and a filling apparatus, the filling apparatus comprising an unfolding device, a sealing device and a filling device, wherein the unfolding device is configured to unfold a flat packaging sleeve into a tubular packaging sleeve, the tubular packaging sleeve comprising two opposite open ends; the sealing device comprises a first sealing mechanism configured to seal one of the open ends to form a container; the filling device comprises a filling mechanism configured to fill the container with a content through the other open end; and the second sealing device is configured to seal the other open end.
16. The system of claim 15, wherein, the pre-folding device is further configured to fold the packaging composite along one of the two curved crease lines and to fold the packaging composite along the other curved crease line.
17. The system according to claim 15 or 16, wherein the crease pattern comprises two of the longitudinal crease lines, the two longitudinal crease lines being spaced apart in the transverse direction, each of the longitudinal crease lines comprising the lenticular crease line; the pre-folding device is further configured to fold the packaging composite along the two curved crease lines of each of the lenticular crease lines.
18. The system according to claim 17, wherein the two longitudinal crease lines comprise: a first longitudinal crease line comprising a first lenticular crease line, the first lenticular crease line comprising a pair of two curved crease lines; and a second longitudinal crease line comprising a second lenticular crease line, the second lenticular crease line comprising a pair of two further curved crease lines; the first lenticular crease line comprises a pair of two curved crease lines; and the second lenticular crease line comprises a pair of two further curved crease lines. The pre-folding device is further configured to simultaneously fold the packaging composite sheet along one of the two curved crease lines of the first lenticular crease line and along one of the other two curved crease lines of the second lenticular crease line; and simultaneously fold the packaging composite sheet along the other of the two curved crease lines of the first lenticular crease line and along the other of the other two curved crease lines of the second lenticular crease line.