Ziplock paper container

Abstract

To provide a paper container with a zipper which has a three-dimensional shape and has a self-standing property, and by which repeated opening and closing of a zipper tape included in the paper container with a zipper can be continuously stabilized.SOLUTION: In a paper container with a zipper 90, a zipper tape on a lower side when a content is shaken out by inclining the paper container with a zipper 90 becomes a male zipper tape. As the content is prevented from being adhered to the male zipper tape, re-fitting of the zipper tape is not prevented by the content.SELECTED DRAWING: Figure 10

Description

[Technical field]

[0001] The present disclosure relates to a paper container with a zipper, and in particular to a paper container with a zipper that has a three-dimensional shape and is self-supporting, and that can maintain stability when its zipper tape is repeatedly opened and closed. [Background technology]

[0002] Conventionally, a technology for a paper container with a zipper has been disclosed, such as that in Patent Document 1. That is, a zipper is provided on the top of a rectangular parallelepiped paper container, and the zipper can be opened when the contents are to be removed, and closed when the contents have been removed.

[0003] The above technology can protect the contents and prevent the contents from spilling when the paper container falls over. Also, because it is a paper container, it is easy to reduce the volume of the container and dispose of it after the contents are consumed. Figure 1 shows a blank plate 81 used to manufacture a paper container 80 with a zipper of the prior art, Figure 2 shows a perspective view of the paper container 80 with a zipper of the prior art, and Figure 3 shows a perspective view of the paper container with a zipper with the top open.

[0004] In addition, unless otherwise specified, referring to Fig. 2, the front wall panel 831b is regarded as the front, and the front, back, left, right, top, and bottom of the chuckable paper container 80 are indicated. The same applies to the chuckable paper container 90 of the present disclosure.

[0005] In addition, the reference numbers used when describing the prior art are in the 80s or 800s to distinguish them from the present disclosure. The subscript a of the symbol indicates an element on the back side of the resealable paper container 80, and the subscript b indicates an element on the front side. For elements with both the subscripts a and b, the symbol without a subscript includes both a and b.

[0006] In the case of the zippered paper container 80 described in Patent Document 1, when opening the top 871 and shaking out the contents, first the protruding part (ear) 874 on the top surface is removed from the body part 872, then the easy-open processing line 851 is cut, and then the zipper tape 861 is opened to open the shaking opening 856 (see Figure 3). Then, the zippered paper container 80 is lifted and tilted to shake out the contents.

[0007] When the front wall panel 831 of the zippered paper container 80 is tilted downward to shake out the contents, the contents slide along the front top panel 833b and the inner surface of the front upper overlapping plate 834b, pass through the front zipper tape 861b, and are discharged from the edge of the lower side (the blank plate 81b of the front portion) of the shaking opening 856. At that time, the contents may adhere to the front zipper tape 861b, which may prevent the zipper tape 861 from re-fitting. In particular, when the contents are powder or highly viscous liquid, there have been cases where the zipper tape 861 is prevented from re-fitting. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] JP 2005-178833 A Summary of the Invention [Problem to be solved by the invention]

[0009] The present disclosure has been made to solve the above-mentioned problems, and its object is to provide a paper container 90 with a zipper in which the zipper tape 61 remains stable when repeatedly opened and closed. [Means for solving the problem]

[0010] ≪Claim 1≫ The above problems can be solved by the following embodiments of the present disclosure. That is, the retractable paper container 90 of the present disclosure has the following features: In a paper container 90 with a zipper, which is assembled by joining a front blank plate 10b and a back blank plate 10a, each of which is made of a laminated sheet 78 based on paper, A top portion 71 is provided at the top of the zipper-equipped paper container 90, and includes an upper overlapping plate 34 formed by overlapping and joining the front blank plate 10b and the back blank plate 10a, and a top plate 33 connected to the lower side of the upper overlapping plate 34; A top side plate 41 is connected to the left and right ends of the upper overlapping plate 34, A top-side protrusion 74 is provided on both the left and right sides of the top portion 71, A body portion 72 provided below the top portion 71; A bottom portion 73 provided on the lower side of the body portion 72; an upper seal portion 53 that crosses the upper edge portion 21 or the vicinity of the upper edge portion 21 of the upper overlapping plate 34 and the side plate 41 of the top portion; a zipper tape 61 located below the upper seal portion 53 and extending across the upper overlapping plate 34 and the side plate 41 of the top portion; Either the front blank plate 10b or the back blank plate 10a is provided with a male zipper tape 61m constituting the zipper tape 61, A female zipper tape 61f constituting the zipper tape 61 is provided on the other of the front blank plate 10a or the back blank plate 10b, The blank plate 93 having the male zipper tape 61m is characterized by having a specific marking thereon.

[0011] ≪Claim 2≫ In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure, The specific indication may indicate that the male zipper tape 61m is on the lower side.

[0012] ≪Claim 3≫ In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure, The specific indication may indicate that the female zipper tape 61f is on the upper side.

[0013] ≪Claim 4≫ In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure, The blank plate 93 on which the male zipper tape 61m is provided may be provided with an opening sharp line 19.

[0014] ≪Claim 5≫ In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure, At least one of the upper overlapping plate 34 and / or the top plate 33, which are part of the blank plate 93, may be provided with an opening sharp line 19 extending vertically in the longitudinal direction of the resealable paper container 90.

[0015] ≪Claim 6≫ In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure, An opening assist line 55 may be provided on the blank plate 93 on which the male zipper tape 61m is provided.

[0016] ≪Claim 7≫ In addition, in the paper container 90 with a zipper according to an embodiment of the present disclosure, At least the upper overlapping plate 34, and / or the side plate 41 of the top, and / or the top panel 33, and / or the top side protruding portion (ear portion) 38 connected to the left and right sides of the top panel 33 may be provided with an opening auxiliary line 55. Effect of the Invention

[0017] According to the embodiment of the present disclosure described above, a paper container 90 with a zipper is provided that can reduce the amount of contents adhering to the zipper tape 61, thereby enabling repeated opening and closing of the zipper tape 61 to be sustained and stable. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a development view of a blank plate 81 used in manufacturing a paper container 80 with a zipper according to the prior art. [Diagram 2] FIG. 1 is a perspective view of a resealable paper container 80 of the prior art. [Diagram 3] 1 is a perspective view of a conventional paper container 80 with a zipper with a top portion 71 open. [Figure 4] 1 is a development view of a blank plate 93 used in manufacturing a retractable paper container 90 according to the first embodiment of the present disclosure. FIG. [Diagram 5] FIG. 5 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced using the blank plate 93 shown in FIG. [Figure 6] 5 is a perspective view showing the shape of a paper container (in a standing state) 92 at an intermediate stage when a paper container 90 with a zipper is produced using the blank plate 93 shown in FIG. 4. FIG. [Figure 7] 5 is a perspective view of a paper container 90 with a zipper produced using the blank plate 93 shown in FIG. 4. FIG. [Figure 8] FIG. 8 is a side view of the zippered paper container 90 shown in FIG. [Figure 9] FIG. 8 is a plan view of the zippered paper container 90 shown in FIG. [Figure 10] 8 is a perspective view of the front side of the zippered paper container 90 shown in FIG. 7 with the top portion 71 open. [Figure 11] 8 is a perspective view of the back of the zippered paper container 90 shown in FIG. 7 with the top portion 71 open. [Figure 12] FIG. 1 is a cross-sectional view of a zipper tape of the present disclosure (prior art). [Figure 13] FIG. 1 is a cross-sectional view of a laminated sheet of blank plates of the present disclosure (prior art). [Figure 14] 1 is a cross-sectional view of a zip tape joint portion of a prior art; [Figure 15] FIG. 2 is a cross-sectional view of a zip tape interface portion of the present disclosure. [Figure 16]FIG. 13 is an explanatory diagram of the zipper tape with the contents attached thereto immediately after the contents are shaken out. [Figure 17] FIG. 1 is an explanatory diagram of a zipper tape with contents attached thereto before the zipper tape is reattached. [Figure 18] 13 is a development view of a blank plate 93 used in manufacturing a retractable paper container 90 according to a second embodiment of the present disclosure. FIG. [Figure 19] 19 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced using the blank plate 93 shown in FIG. 18. FIG. [Figure 20] 19 is a perspective view of a paper container 90 with a zipper produced using the blank plate 93 shown in FIG. 18. FIG. [Figure 21] FIG. 20 is a plan view of the zippered paper container 90 shown in FIG. 18. [Figure 22] 19 is a perspective view of the chuckable paper container 90 shown in FIG. 18 with the top open, seen from the front. [Figure 23] 13 is a development view of a blank plate 93 used in manufacturing a retractable paper container 90 according to a third embodiment of the present disclosure. FIG. [Figure 24] 24 is a perspective view of a chuckable paper container 90 made using the blank plate 93 shown in FIG. 23 with the top open, as viewed from the front. [Diagram 25] 25 is a perspective view of the zippered paper container 90 of FIG. 24 with text printed on the front top panel 33, with the top open, as viewed from the front. FIG. [Figure 26] FIG. 13 is a development view of a blank plate 93 used to manufacture a chuck-equipped paper container 90 according to the second embodiment and modified example 1 of the third embodiment of the present disclosure. [Figure 27] FIG. 11 is a development view of a blank plate 93 used to manufacture a chuck-equipped paper container 90 according to the second embodiment and modified example 2 of the third embodiment of the present disclosure. [Figure 28] FIG. 11 is a development view of a blank plate 93 used to manufacture a chuck-equipped paper container 90 according to the second embodiment and modified example 3 of the third embodiment of the present disclosure. [Figure 29]FIG. 11 is a development view of a blank plate 93 used to manufacture a chuck-equipped paper container 90 according to the second embodiment and modified example 4 of the third embodiment of the present disclosure. [Diagram 30] 13 is a development view of a blank plate 93 used in manufacturing a retractable paper container 90 according to a fourth embodiment of the present disclosure. FIG. [Diagram 31] 13 is a development view of a blank plate 93 used in manufacturing a retractable paper container 90 according to a fifth embodiment of the present disclosure. FIG. [Diagram 32] 13 is a development view of a blank plate 93 used in manufacturing a retractable paper container 90 according to a sixth embodiment of the present disclosure. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] The present disclosure will be described below with reference to the drawings, however, the present disclosure is not limited to the specifically illustrated embodiments or various specifically described structures. In each drawing, the size and ratio of the components may be changed or exaggerated for ease of understanding, and parts that are unnecessary for the explanation or repeated reference numerals may be omitted for ease of viewing.

[0020] In addition, the numerical values ​​such as dimensions of each member and the names of materials described in this specification are examples of embodiments, and are not limited to these, and may be appropriately selected and used. In this specification, terms that specify shapes or geometric conditions, such as parallel, orthogonal, vertical, center, etc., are intended to include substantially the same state in addition to their strict meanings.

[0021] The blank plate 93 of the chuckable paper container 90 of the present disclosure is formed into a rectangular outer shape using a laminated sheet 78 having at least a base paper layer and at least an innermost layer of a thermo-adhesive resin such as polyethylene, and various fold lines are provided within the blank plate 93 to separate the forming plates for each part required to form the chuckable paper container 90.

[0022] First Embodiment <Blank board> A blank plate 93 of a chuckable paper container 90 according to the first embodiment of the present disclosure is shown in Fig. 4. Fig. 4(a) shows the back blank plate 10a, and Fig. 4(b) shows the front blank plate 10b. The back blank plate 10a and the front blank plate 10b are collectively referred to as the blank plate 93.

[0023] Unless otherwise specified, in each component of the blank plate 93 described below, the subscript a of each symbol indicates an element of the back blank plate 10a, and the subscript b indicates an element of the front blank plate 10b. For elements with both the subscripts a and b, the symbol without a subscript includes both a and b.

[0024] The rear upper edge 21a, which is the lower side of the rear blank plate 10a in the drawing of FIG. 4(a), becomes the upper side of the paper container 90 with a zipper. The front-side upper edge portion 21b, which is the upper side of the front-side blank plate 10b in the drawing of FIG. 4(b), becomes the upper side of the paper container 90 with a zipper.

[0025] In both Figures 4(a) and (b), the front side of the drawing corresponds to the outer side when the resealable paper container 90 is assembled, and the back side corresponds to the inner side. Figures 4(a) and (b) are symmetrical with respect to the upper edge portions 21a and 21b, respectively, and when the inner surfaces of the back blank plate 10a and the front blank plate 10b are aligned and overlapped, each component (the forming plates, lines, sealing portions, zipper tape joints, etc. described below) overlap.

[0026] The back blank plate 10a and the front blank plate 10b are aligned and stacked and joined to produce an intermediate stage paper container with a zipper (flat state) 91 as shown in Figure 5, and then an intermediate stage paper container with a zipper (raised state) 92 as shown in Figure 6 is produced, progressing through the steps to complete the paper container with a zipper 90; this manufacturing process will be described later.

[0027] Unless otherwise specified, the top, bottom, left and right of the front blank plate 10b will be shown with reference to Figure 4(b). The back blank plate 10a will also be described with its upper edge 21a as the top side. Therefore, the top and bottom are reversed in Figure 4(a). In the paper container 90 with a zipper, the upper edge 21 side is the upper side, and the lower edge 26 side is the lower side.

[0028] As will be described later, the formed resealable paper container 90 is composed of a top portion 71, a body portion 72, and a bottom portion 73, in that order from the top, and the top portion may be referred to as the top portion and the bottom portion may be referred to as the bottom portion (see FIG. 7). In addition, when describing the up-down direction of each component provided on the top 71, the term "top side" may refer to the upper edge 21 side, and when describing the up-down direction of each component provided on the bottom 73, the term "bottom side" may refer to the lower edge 26 side.

[0029] As described above, the rear blank plate 10a and the front blank plate 10b have vertically symmetrical shapes, so the blank plate 93 will be described with reference to the front blank plate 10b. As long as the function is not changed, the rear blank plate 10a and the front blank plate 10b may not be symmetrical. Moreover, the rear blank plate 10a and the front blank plate 10b are made of the same material (layer structure) and are manufactured by the same method.

[0030] The front blank plate 10b of the zippered paper container 90 of this embodiment is formed into a substantially rectangular shape by using a laminated sheet 78 in which at least a base paper is laminated and at least a thermo-adhesive resin such as polyethylene is laminated as the innermost layer. With reference to Fig. 4(b), the upper side is the upper edge portion 21b, the left and right sides are the front side edge portions 11b, and the lower side is the lower edge portion 26b. The front blank plate 10b has a shape that is symmetrical with respect to a vertical line passing through the center of the front blank plate 10b in the width direction. The laminated sheet 78 will be described later.

[0031] The front blank plate 10b is provided with, in the longitudinal direction from the left, a front first vertical folding line 12b, a front second vertical folding line 13b, a front second vertical folding line 13b, and a front first vertical folding line 12b. That is, the vertical folding line closer to the front side edge 11b of each front blank plate 10b is the front first vertical folding line 12b, and the vertical folding line farther from the front side edge 11b of each front blank plate 10b is the front second vertical folding line 13b. It is preferable that each of these front longitudinal fold lines 12b, 13b is substantially parallel to the side edge 11b of the front blank plate 10b.

[0032] In addition, the front blank plate 10b is provided with, in the transverse direction from the front upper edge portion 21b, a front first horizontal folding line 22b, a front second horizontal folding line 23b, a front third horizontal folding line 24b, and a front fourth horizontal folding line 25b. It is preferable that the front side horizontal fold lines 22b, 23b, 24b, 25b are each approximately parallel to the upper edge 21b and the lower edge 26b.

[0033] Furthermore, a pair of diagonal fold lines 17b on the top side of the front surface and a pair of diagonal fold lines 18b on the bottom side of the front surface are provided on the left and right sides, and the forming plates of each part required for forming the zippered paper container 90 are partitioned and configured.

[0034] The upper end of the front top diagonal folding line 17b is at the same position as the front first top intersection point Eb, which is the intersection point of the front first vertical folding line 12b and the front first horizontal folding line 22b. The lower end of the front top diagonal folding line 17b is at the same position as the front second top intersection point Fb, which is the intersection point of the front second vertical folding line 13b and the front second horizontal folding line 23b.

[0035] The upper end of the front bottom diagonal fold line 18b is at the same position as the front second bottom intersection point Hb, which is the intersection point of the front second vertical fold line 13b and the front third horizontal fold line 24b. The lower end of the front bottom diagonal fold line 18b is at the same position as the front first bottom intersection point Gb, which is the intersection point of the front first vertical fold line 12b and the front fourth horizontal fold line 25b.

[0036] The oblique folding lines 17b on the front side may be located near the intersections Eb and Fb without contacting them. Furthermore, the oblique folding lines 18b on the front side may be located near the intersections Gb and Hb without contacting them. By positioning each of the above-mentioned front diagonal folding lines and each intersection point in close proximity without touching each other, it is possible to maintain sufficient folding performance while preventing excessive concentration of folding lines at any particular location, thereby preventing a decrease in the strength of the laminated sheet of the front blank plate 10b.

[0037] At the front side edge portions 11b on both the left and right sides of the front blank plate 10b, front side edge seal portions 36b are formed via the front first vertical folding lines 12b.

[0038] Further, at the front bottom edge portion 26b located below the front blank plate 10b, a front bottom seal margin 37b is formed at the front fourth horizontal folding line 25b.

[0039] Further, the front blank plate 10b is provided with forming plates for each part downward from the front upper edge 21b located at the uppermost side.

[0040] Regarding the main part, a front upper overlapping plate 34b is provided below the front upper edge 21b. A front top panel 33b is connected to the bottom of the front upper overlapping plate 34b via a front first horizontal bending line 22b. A front wall panel 31b is connected to the bottom of the front top panel 33b via a front second horizontal bending line 23b. A front bottom panel 35b is connected to the bottom of the front wall panel 31b via a front third horizontal bending line 24b.

[0041] Further, side plates 41b of the top part of the front side are connected to the outside of both the left and right sides of the front side upper overlapping plate 34b via the front side second vertical folding line 13b.

[0042] Further, on both the left and right outer sides of the front top panel 33b, front top protruding portions (ear portions) 38b are connected via the front second vertical folding lines 13b.

[0043] Further, a front side panel 32b is connected to the outside of both the left and right sides of the front wall panel 31b via a front second vertical bending line 13b.

[0044] Further, on both the left and right outer sides of the front bottom panel 35b, front bottom protruding portions (ear portions) 43b are connected via the front second vertical bending lines 13b.

[0045] Also, the top protruding portion (ear) margin 38b is connected to the bottom of each top side panel 41b via the first horizontal bending line 22b. The top protruding portion (ear) margin 38b is connected to the bottom of the top protruding portion (ear) margin 38b via the second horizontal bending line 23b. The bottom protruding portion (ear) margin 43b is connected to the bottom of the side panel 32b via the third horizontal bending line 24b.

[0046] A bottom seal portion 37 is connected to the lower sides of the front bottom panel 35b and the bottom protruding portions (ear portions) 43 on both the left and right sides.

[0047] The side panels 41b of the top surface of the front side, the protruding portion (ear) portion 38b of the top surface of the front side, the side panels 32b of the front side, and the protruding portion (ear) portion 43b of the bottom surface are connected to the left and right outer sides of the front surface side edge seal portion 36b via the first vertical fold line 12b of the front surface.

[0048] In the present embodiment, the process of providing folding lines to the blank plate 93 (creasing process) is performed after the laminated sheet 78 is completed, and then the laminated sheet 78 is fed to a machine that manufactures the chuck paper container 90. Alternatively, the creasing process may be performed by the machine that manufactures the chuck paper container 90.

[0049] As the method for forming the creasing lines, an appropriate method is adopted from among known methods such as a platen method and a rotary die method. Also, the laminated sheet 78 may be cut into sheets before the scoring process is performed, or the laminated sheet 78 may be supplied to the scoring process in a roll form.

[0050] Next, a punching process for manufacturing blank plates 93 by punching the laminated sheet 78 will be described. For the punching process, an appropriate method is selected from known methods such as a platen method and a rotary die method. The blank plate 93 may be formed directly from the rolled laminated sheet 78, or the sheet may be cut into sheets and then punched. The order of the creasing and punching processes does not matter. They may be done at the same time.

[0051] In addition, the roll-shaped laminated sheet 78 slit to a specified roll width may be fed to a machine that manufactures paper containers 90 with zippers, and the roll-shaped laminated sheet 78 may be cut in the cross direction to produce blank plates 93.

[0052] The rear blank plate 10a has the same shape as the front blank plate 10b and is symmetrical with respect to the axis of the front blank plate 10b. In other words, the blank plates have the same shape but have the layer structure reversed.

[0053] Fig. 5 is a front view showing the shape of a chucked paper container (flat state) 91 at an intermediate stage when manufacturing a chucked paper container 90 using the blank plate 93 shown in Fig. 4. The topmost part is the front-side upper edge 21b of the front-side blank plate 10b shown in Fig. 4(b), and on its back side is the back-side blank plate 10a. The back-side blank plate 10a cannot be seen with the naked eye, but when viewed through, it has almost the same shape as the front-side blank plate 10b.

[0054] In addition, in Figure 5, the back blank plate 10a and the front blank plate 10b are overlapped, and each component has the same positional relationship when viewed through the drawing, within the range of manufacturing variations, so the notation and suffixes for the front side may be omitted in the explanation.

[0055] On the upper overlapping plate 34 and the side plate 41 of the top surface, at a predetermined position where the two blank plates mentioned above overlap each other, an upper seal portion 53 as a transverse sealing means and a zipper tape joint portion 52 are provided in sequence from the upper edge portion 21.

[0056] The upper seal portion 53 is provided at or near the upper edge 21 of the upper overlapping plate 34 and each of the top side plates 41 . When the upper seal portion 53 is approximately parallel to the upper edge portion 21, the length of the upper seal portion 53 can be shortened, and no waste is generated in the blank plate 93.

[0057] The upper seal portion 53 as a transverse sealing means is formed by joining the opposing front-side upper seal portion 53b and back-side upper seal portion 53a. The joining is performed so as to traverse the entire width of the upper edge portion 21 of the resealable paper container 90 or the vicinity of the upper edge portion 21, so that the resealable paper container 90 is kept airtight.

[0058] Additionally, it is desirable that the upper seal portion 53 be approximately parallel to the upper edge portion 21. Additionally, it is desirable that the zipper tape joint portion 52 be approximately parallel to the upper edge portion 21. In such a configuration, it is easy to open and close the zipper tape 61 and to remove the contents. Also, the length of the zipper tape 61 can be shortened.

[0059] <Easy-to-open processing line> The easy-open processing line 51 will now be described. The upper overlapping plate 34 and the side plate 41 of the top portion may be provided with an easy-open processing line 51 as an opening means. By providing the easy-open processing line 51, the zippered paper container 90 can be opened without using tools such as scissors.

[0060] Referring to FIG. 5, the easy-open processing line 51 extends from one side edge 11 to the other side edge 11 of the blank plate 93 and exists between the upper seal portion 53 and the zipper tape 61 .

[0061] A notch 77 may be provided at either end of the easy-open processing line 51, and in this embodiment, the notch 77 is provided at the right side edge 11. The notch 77 may also be provided at the left side edge 11. Alternatively, notches 77 may be provided at both the left and right side edges 11. Providing the notch 77 makes initial opening easier.

[0062] By cutting the easy-open processing line 51 from one side edge (here the right side) 11 to the other side edge (here the left side) 11, the upper overlapping plate 34 and the side plate 41 of the top of the front side are cut transversely, and the upper seal portion 53 is also cut away, exposing the zipper tape 61.

[0063] When an intermittent half-cut line or a straight half-cut line is used for the easy-open processing line 51 of the opening means, it may be formed by a method using a normal blade, but a half-cut line with greater precision and stability can be formed by using a method using laser light irradiation, a method using ultrasonic waves, or a method called diamond cutting.

[0064] Moreover, the easy-open processing line 51 may be in the shape of a band having a width. Moreover, a plurality of easy-open processing lines 51 may be provided.

[0065] Depending on the material, layer structure, and easy-open processing conditions of the laminated sheet 78 of the blank plate 93, the easy-open processing line 51 may not be provided. Even if the easy-open processing line 51 is not provided, there are cases where the package can be opened by hand.

[0066] Furthermore, when the easy-open processing line 51 is not provided as described above, the container may be opened with a blade such as scissors. In that case, the intended opening line may be indicated by printing. The position of the printing may be the position of the easy-open processing line 51 shown in Fig. 5. The intended opening line may not be clearly indicated on the resealable paper container 90, but may be indicated in an attached instruction manual or the like.

[0067] <Zipper tape> Fig. 12 is a schematic cross-sectional view showing an example of the configuration of a zipper tape 61 used in a paper container with zipper tape 90 of the present disclosure. The zipper tape 61 shown in Fig. 12(a) is a state in which a male zipper tape 61m and a female zipper tape 61f are formed by extrusion molding, respectively, and are not yet fitted together. The zipper tape 61 is composed of a male zipper tape body 62m provided with a convex male zipper tape fitting portion 63m, and a female zipper tape body 62f provided with a concave female zipper tape fitting portion 63f.

[0068] The zipper tape 61 is formed by extrusion molding of a thermoplastic resin, or may be formed as a multi-layer extrusion molding by using a resin suited to the required performance of each component of the zipper tape 61 (such as the zipper tape body 62, the zipper tape fitting portion 63, etc.).

[0069] The material of the side of the zipper tape body 62 which is joined to the blank plate 93 desirably has a low melting point since it is heat-welded, but the side of the zipper tape body 62 which is not joined to the blank plate 93 or the portion not in contact with the outer surface (the inner layer) may have heat resistance sufficient to withstand the heat sealing temperature.

[0070] Examples of the former low melting point material include low density polyethylene (LDPE) and linear low density polyethylene (LLDPE), while examples of the latter heat resistant material include medium density polyethylene (MDPE), high density polyethylene (HDPE), and polypropylene (PP).

[0071] Furthermore, since male zipper tape fitting portion 63m does not need to deform when fitting with female zipper tape fitting portion 63f, male zipper tape fitting portion 63m may be harder than female zipper tape fitting portion 63f (hardness depending on material and shape). Examples of the material of the male zipper tape fitting portion 63m include low density polyethylene (LDPE), linear low density polyethylene (LLDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), and polypropylene (PP).

[0072] The male zipper tape 61m and the female zipper tape 61f, which are separately extrusion-molded, are fitted together at their respective male zipper tape fitting portions 63m and female zipper tape fitting portions 63f, as shown in Figure 12(b), to complete the zipper tape 61.

[0073] <Zipper tape joining procedure> The procedure for assembling the zippered paper container 90 will be described later, but here, the procedure for joining the zipper tape 61 will be described.

[0074] In this case, the zipper tape joint portion 52 is a portion to be joined by the zipper tape 61 when assembling the zippered paper container 90.

[0075] The rear blank sheet 10a and the front blank sheet 10b are overlapped, and the side edge seal portions 36 and the upper seal portions 53 are heat sealed together. At this time, the zipper tape 61, in which the male zipper tape 61m and the female zipper tape 61f are previously fitted at the male zipper tape fitting portion 63m and the female zipper tape fitting portion 63f, is inserted into this portion, and at the same time, the zipper tape joint portion 52 of the two blank sheets 93 is heated and pressurized from the outer surfaces thereof. Then, the blank sheets 93 and the zipper tapes 61 are heat-sealed.

[0076] The method of joining the zipper tape 61 to the blank plate 93 is not limited to the above-mentioned heat sealing, and other methods such as adhesive or adhesive tape may be used.

[0077] Although an example has been shown here in which the male zipper tape 61m is the front zipper tape 61b and the female zipper tape 61f is the back zipper tape 61a, the male zipper tape 61m may be the back zipper tape 61a and the female zipper tape 61f may be the front zipper tape 61b.

[0078] By heat-sealing the zipper tape 61 in this manner, there is less misalignment in the heat seal compared to a method in which the male zipper tape 61m and the female zipper tape 61f are separately heat-sealed to the zipper tape joint 52, and the attachment process is simplified, so that the zipper tape 61 can be attached with high production efficiency.

[0079] <Laminated sheet of blank boards> As described above, the laminated sheet 78 used for the blank plate 93 is a laminated sheet 78 having at least a paper base layer 782 laminated thereto, and at least the innermost thermoplastic resin layer 783 made of a thermoplastic resin such as polyethylene. However, if necessary, the intermediate layers may be provided with a barrier layer 785 against water vapor, oxygen, or other substances, or a strength-enhancing layer.

[0080] Furthermore, when providing a printed layer with a pattern or the like on the zippered paper container 90 of this embodiment, it is usually printed on the surface of the paper base layer 782. However, if the paper base layer 782 is not well suited for printing, a printed layer with a pattern or the like can be provided on, for example, a biaxially oriented polyethylene terephthalate film, and the film can be laminated to any of the outer layers of the paper base layer 782.

[0081] The paper base layer 782 is preferably made of paper that is rigid and does not easily crack when folded along a folding line, but there are no particular limitations and an appropriate paper can be selected and used depending on the contents to be filled into the zippered paper container 90, taking into consideration water resistance (size degree) and other factors. As specific examples, wood-free paper, bleached kraft paper, cup base paper, milk carton base paper, etc. can be suitably used, and the basis weight thereof is 80 to 320 g / m 2 The range is appropriate.

[0082] Examples of resins that can be used for the innermost layer and, if necessary, the outermost and intermediate thermal adhesive resin layers (sealant layers) include low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-α-olefin copolymers polymerized using a single-site catalyst, ethylene-vinyl acetate copolymers (EVA), ethylene-acrylic acid copolymers (EAA), ethylene-methacrylic acid random copolymers (EMAA), ethylene-methyl acrylate copolymers (EMA), ethylene-ethyl acrylate copolymers (EEA), ionomers, polypropylene and its copolymers, polyester resins, etc., and from these, a suitable one can be selected and used depending on the contents to be filled and the conditions of storage and use.

[0083] Among the above-mentioned heat-adhesive resins, ethylene-methyl acrylate copolymer (EMA) and ethylene-methacrylic acid random copolymer (EMAA) are particularly excellent in heat stability during processing such as extrusion coating, adhesion to various substrates, low-temperature heat sealability, and the like, and also have excellent thin-film formability. Therefore, it is easy to laminate the outermost heat-adhesive resin layer, which does not require a large thickness, by extrusion coating in a relatively thin thickness of, for example, 6 to 10 μm, and this not only reduces the proportion of plastic materials used, but also provides cost benefits.

[0084] The above-mentioned innermost layer and, if necessary, the outermost layer, the thermal adhesive resin layer, may be laminated by extrusion coating the resin on the laminated surface after subjecting the laminated surface to an easy-adhesion treatment such as anchor coating, corona treatment, or flame (flame) treatment, as necessary. Alternatively, the thermal adhesive resin may be formed into a film in advance, and the film may be laminated by bonding it together using a known dry laminate or extrusion laminate (sandwich laminate) method.

[0085] When the barrier layer 785 is laminated on the intermediate layer of the laminated sheet 78, a metal foil such as an aluminum foil, or a deposition film in which a metal or inorganic oxide such as aluminum, silica, or alumina is deposited to a thickness of 20 to 100 nm on a base film such as a biaxially oriented polyethylene terephthalate film (hereinafter, PET film), a biaxially oriented nylon film (hereinafter, ON film), or a biaxially oriented polypropylene film (hereinafter, OPP film) can be used as the barrier layer 785. Alternatively, a saponified ethylene-vinyl acetate copolymer film (hereinafter, EVOH film), a biaxially oriented nylon MXD6 film, a polyacrylonitrile film, or a PET film, ON film, or OPP film provided with a coating layer of polyvinylidene chloride can be used.

[0086] Such a barrier layer 785 is usually preferably laminated on the inner surface of the paper base layer 782 in order to effectively utilize its barrier properties, but when a metal foil such as aluminum or a metal-deposited film is used for the barrier layer 785, the metallic feel can also be utilized in the design, so that it can also be laminated on the outer surface of the paper base layer 782. The barrier layer 785 can be easily laminated by known dry lamination or extrusion lamination (sandwich lamination), etc.

[0087] The layer structure of the laminated sheet 78 of the blank plate 93 of the resealable paper container 90 of this embodiment is illustrated. FIG. 13(a) is a cross-sectional view of a laminated sheet 78 of a blank plate 93 consisting of three layers. The layer structure is as follows: Outermost thermoplastic resin layer 781 / Paper base layer 782 / Innermost thermoplastic resin layer 783 It consists of:

[0088] FIG. 13(b) is a cross-sectional view of a laminated sheet 78 of a blank plate 93 consisting of two layers. The layer structure is as follows: Paper base layer 782 / innermost thermoplastic resin layer 783 This layer structure is obtained by removing the outermost thermoplastic resin layer 781 from the three-layered blank plate 93 shown in Fig. 13(a).

[0089] In addition, when the blank plate 93 is required to have a barrier property (water vapor, oxygen, aroma retention, etc.), a barrier layer 785 can be provided. Fig. 13(c) is a cross-sectional view of a laminated sheet 78 of the blank plate 93 consisting of five layers, and the layer structure is as follows: Outermost thermoplastic resin layer 781 / Paper base layer 782 / Intermediate adhesive layer 784 / Barrier layer 785 / innermost thermoplastic resin layer 783 It consists of:

[0090] FIG. 13(d) is a cross-sectional view of a laminated sheet 78 of a blank plate 93 consisting of four layers. The layer structure is as follows: Paper base layer 782 / Intermediate adhesive layer 784 / Barrier layer 785 / Innermost thermoplastic resin layer 783 It consists of: This layer structure is obtained by removing the outermost thermoplastic resin layer 781 from the five-layer blank plate 93 shown in FIG. 13(c).

[0091] The layers of the laminated sheets 78 are bonded together by known methods such as dry lamination, extrusion coating, adhesives, etc. Note that layers for bonding the layers together are not shown because they are thin.

[0092] The laminated sheet 88 of the retractable paper container 80 of the prior art is similar to the laminated sheet 78 of the retractable paper container 90 of the present disclosure. Referring to FIG. 13, there are an outermost thermoplastic resin layer 881 , a paper base layer 882 , an innermost thermoplastic resin layer 883 , an intermediate adhesive layer 884 , and a barrier layer 885 .

[0093] <Preparation of paper container with zipper> Below is an overview of the steps taken to create an intermediate stage paper container with a zipper (flat state) 91 from a blank plate 93 of a paper container with a zipper 90, to create an intermediate stage paper container with a zipper (raised state) 92, and finally to complete a package of paper container with a zipper 90 filled with the contents.

[0094] <Creating a paper container with a zipper (flat state) at the intermediate stage> When the two blank plates 10a, 10b are overlapped, the zipper tape 61, which has a male zipper tape 61m and a female zipper tape 61f already fitted together, is inserted into the position where the zipper tape joints 52 overlap, and the zipper tape joints 52 are heated and pressurized from the outer surface of the blank plate 93 to be heat-sealed.

[0095] Next, the inner faces of the upper seal portion 53 are heat-sealed, and the inner faces of the seal margins 36 of the side edges adjacent to the side edge portion 11 of the blank plate 93 are heat-sealed, so that the lower edge portion 26 is formed into an open bag shape.

[0096] Also, a notch 77 may be provided at each end (at the points contacting the side edges on both sides) of the outer edge of the easy-open processing line 51. The notch 77 may be provided at either one of the ends.

[0097] The actual production of the zippered paper container 90 is not particularly limited, but in order to improve productivity, a machine may be used that performs in-line assembly of the paper container, filling of the contents, and sealing of each joint.

[0098] In this device, a long printed laminated sheet 78 wound up in a roll can be unwound, and in a format in which the paper containers are connected horizontally, processing of folding lines, insertion and heat sealing of zipper tape 61, heat sealing of side edge seal portions 36, heat sealing of upper seal portion 53, punching of notches 77, etc. can be performed.

[0099] It should be noted that the order of the steps may be different from that described above, so long as the desired paper container 90 with a zipper can be obtained.

[0100] Next, an intermediate-stage paper container with a zipper (flat state) 91 in the shape shown in Figure 5 is produced by cutting it into individual paper containers, and then it is molded into a three-dimensional shape to produce an intermediate-stage paper container with a zipper (raised box state) 92 as shown in Figure 7.

[0101] <Creating a paper container with a zipper (in an erected state) at the intermediate stage> A mandrel is inserted through the opening of the bottom 73 of this intermediate stage zippered paper container (flat state) 91, leaving the upper overlapping plate 34, and the lower top plate 33 is spread out front to back by the first horizontal fold line 22, and the upper overlapping plate 34 is stood upright.

[0102] Here, in order to ensure that the ridge portion 72d of the body portion 72 is bent, an auxiliary member may be brought into contact with the vicinity (including abutment) of the ridge portion 72d from the inner side and / or the outer side of the body portion 72.

[0103] A top portion 71 made of a top panel 33 is formed below the upper overlapping plate 34, followed by a body portion 72 having an approximately rectangular shape in horizontal cross section, and an intermediate stage paper container with a zipper (standing state) 92 is formed with a bottom portion 73 opening in an approximately rectangular shape. At this stage, as shown in FIG. 6, the upper overlapping plate 34 stands upward.

[0104] In addition, in the design, the horizontal cross-sectional shape of the body 72 and the shape of the opening of the bottom 73 are assumed to be rectangular, but because the zippered paper container 90 is made of a flexible laminated sheet 78 mainly made of paper, they are made approximately rectangular, even if they are not completely rectangular.

[0105] <Forming and filling of paper containers with zippers> Next, the upper overlapping plate 34, which stands upward, is folded toward the back side (the back top panel 33a side) and laid down, and the top side protruding portions (ears) 74, which protrude on both the left and right sides, are folded toward the side panel 32 and joined to the body portion 72.

[0106] The joining method may be a method using an adhesive (hot melt, etc.), a method using an adhesive tape, a mechanical joining method (engagement, joining with a joining tool), etc. Also, when a thermoplastic resin layer (sealant layer) is provided on the outermost layer of the blank plate 93, the thermoplastic resin layer may be heat-sealed. A similar method is used for joining the bottom side protrusions (ears) 75 described later.

[0107] In addition, the tip of the top protrusion (ear) 74 may be joined to the body 72 of the paper container 90 with a zipper. In addition, a portion other than the tip of the top side protruding portion (ear) 74 may be joined to the body 72 of the zippered paper container 90. In that case, the tip of the top side protruding portion (ear) 74 does not need to be joined to the body 72 of the zippered paper container 90.

[0108] The bottom 73 of the intermediate stage zippered paper container (standing state) 92 formed as described above is turned upward, and the contents are filled through the open bottom 73, and then the bottom 73 is folded and the bottom side seal portions 37 are heat sealed together in a palm-to-palm seal format.

[0109] Then, the bottom side sealing portion 37 is folded toward the back side (toward the back side bottom panel 35a) and laid down, and the bottom side protruding portions (ears) 75 protruding on both the left and right sides are folded toward the bottom panel 35 and joined, thereby completing the packaging body of the approximately rectangular shaped zippered paper container 90.

[0110] Fig. 7 is a perspective view showing a first embodiment of a chuck paper container 90 of the present disclosure. Fig. 8 is a side view of the chuck paper container 90 shown in Fig. 7. Fig. 9 is a plan view of the chuck paper container 90 shown in Fig. 7.

[0111] The zippered paper container 90 shown in FIG. 7 has an outer shape formed into a substantially rectangular parallelepiped shape, and its body 72 has a ridge portion 72d. In addition, the design assumes a rectangular shaped paper container 90 with a zipper, but since the paper container 90 with a zipper is made of a flexible laminated sheet 78 mainly made of paper, it is made to have an approximately rectangular shape, even if it does not have a perfect rectangular shape.

[0112] <Opening operation for shaking out the contents of a paper container with a zipper> Fig. 10 is a perspective view of the front of the completed resealable paper container 90 with contents, with the top 71 of the package opened to shake out the contents. Fig. 11 is a perspective view of the back of the same resealable paper container 90.

[0113] The easy-open processing line 51 is opened by hand from a notch 77 provided on one side edge 11 (here the right side) and is cut all the way to the other side edge 11 (here the left side).

[0114] Next, the front side opening grip area 57b between the front side easy-open processing line 51b and the front side zipper tape 61b, and the back side opening grip area 57a between the back side easy-open processing line 51a and the back side zipper tape 61a are each grasped with a human hand and spread out toward the outside of the zippered paper container 90, thereby opening the zipper tape 61 exposed at the easy-open processing line 51.

[0115] During this opening operation of the zipper tape 61, the ends of the zipper tape 61 on the side edge 11 side of each blank plate 93 are opened over substantially the entire width up to the seal margins 36 on each side edge. As described above, the male zipper tape 61m and the female zipper tape 61f of the zipper tape 61 are separated from each other, whereby the swing-out opening 56 is formed.

[0116] <Zipper tape properties and content release direction> A cross-sectional view of a zipper tape 861 of the prior art is shown in Fig. 12. Fig. 12(a) shows a state in which the male zipper tape 861m and the female zipper tape 861f are separated from each other, while Fig. 12(b) shows a state in which the male zipper tape 861m and the female zipper tape 861f are engaged with each other.

[0117] Moreover, the zipper tape 61 of the present disclosure has a similar shape to that described above, and will also be described with reference to Fig. 12. Regarding the reference numerals, the reference numerals for the zipper tape 861 of the prior art and the zipper tape 61 of the present disclosure are shown together. A cross-sectional view of the zipper tape 61 of the present disclosure is shown in Fig. 12. Fig. 12(a) shows a state in which the male zipper tape 61m and the female zipper tape 61f are separated from each other, and Fig. 12(b) shows a state in which the male zipper tape 61m and the female zipper tape 61f are engaged with each other.

[0118] Fig. 14(a) shows a cross-sectional view of a zipper tape joint portion in which a zipper tape 861 and a blank plate 81 are joined in the prior art, cut at the cross-sectional position AA in Fig. 5. Note that Fig. 5 is a diagram showing a paper container (flat state) in an intermediate stage of the present disclosure, but is also used for the zipper tape 861 of the prior art to explain the cross-sectional position.

[0119] At this stage, the male zipper tape 861m and the female zipper tape 861f are in a mated state. FIG. 14(b) is a cross-sectional view showing a state in which the engagement between the male zipper tape 861m and the female zipper tape 861f is released from the state shown in FIG. 14(a).

[0120] In FIG. 14(a), a front zipper tape 861b is joined to a blank plate 81b on the front side, and the front zipper tape 861b serves as a female zipper tape 861f. Further, a rear zipper tape 861a is joined to the rear portion of the blank plate 81a, and in this figure, the rear zipper tape 861a is a male zipper tape 861m.

[0121] Fig. 15 shows the zipper tape joint portion of this embodiment. In Fig. 15(a), a front zipper tape 61b is joined to a front blank plate 10b, and in this embodiment, the front zipper tape 61b is a male zipper tape 61m. In addition, a back zipper tape 61a is joined to the back blank plate 10a, and in this embodiment, the back zipper tape 61a is a female zipper tape 61f.

[0122] Unlike this embodiment, the front zipper tape 61b may be the female zipper tape 61f and the back zipper tape 61a may be the male zipper tape 61m. In either case, the zipper tape 61 is a pair of a male zipper tape 61m and a female zipper tape 61f.

[0123] Here, when the front wall panel 831 of the zippered paper container 80 of the conventional technology is tilted downward to shake out the contents, the contents slide along the front top panel 833b and the inner surface of the front upper overlapping plate 834b, pass through the front zipper tape 861b, and are discharged from the edge of the lower side of the shaking opening 856 (the blank plate 81b of the front portion).

[0124] At that time, the contents 89 pass across the front zipper tape 861b. As shown in Fig. 14, the front zipper tape 861b is a female zipper tape 861f, and a recess exists in the female zipper tape fitting portion 863f. Then, when the contents 89 pass through, the contents 89 enter and accumulate in the recess as shown in Fig. 16(a).

[0125] Then, when the zipper tape 861 is re-fitted after the contents have been shaken out and the tilt of the zippered paper container 80 has been returned to its original position, as shown in Figure 17(a), the contents 89 may have accumulated inside the recess that is the female zipper tape fitting portion 863f, and this content 89 may hinder the male zipper tape 861m and the female zipper tape 861f from being re-fitted together.

[0126] Furthermore, when the front wall panel 31 of the zippered paper container 90 of the present disclosure is tilted downward, the contents 79 slide along the front top panel 33b and the inner surface of the front upper overlapping plate 34b, pass through the zipper tape 61, and are discharged from the edge of the lower side of the shaking opening 56 (the front blank plate 10b side).

[0127] At that time, the contents 79 pass across the front zipper tape 61b. As shown in Fig. 15(a), the front zipper tape 61b is the male zipper tape 61m, and the male zipper tape fitting portion 63m has a convex shape. Therefore, even if the contents 79 pass through, only a small amount of the contents 79 accumulates on the male zipper tape 61m, as shown in Fig. 16(b).

[0128] Then, when the zipper tape 61 is re-fitted after the contents have been shaken out and the tilt of the zippered paper container 90 has been returned to its original position, as shown in Figure 17(b), only a very small amount of contents 79 has accumulated on the upper side of the convex portion, which is the male zipper tape fitting portion 63m, and this content 79 does not hinder the re-fitting of the male zipper tape 61m and the female zipper tape 61f, so they can be easily re-fitted. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0129] As described above, when tilting the paper container 90 with a zipper to shake out the contents 79, it is desirable to make the contents pass over the male zipper tape 61m. To achieve this, the paper container 90 with a zipper is tilted in such a way that the male zipper tape 61m is on the lower side and the female zipper tape 61f is on the upper side.

[0130] To achieve this, when tilting the zippered paper container 90 to scoop out the contents 79, a specific indication is printed on the zippered paper container 90 instructing the container to tilt so that the male zipper tape 61m is on the bottom. The display may be made on the surface of the resealable paper container 90 by printing, attaching an adhesive sticker, stamping, inkjet printing, or the like.

[0131] Here, a case will be considered in which the front zipper tape 61b is a male zipper tape 61m and the back zipper tape 61a is a female zipper tape 61f. In addition, since the front wall panel 31 is often tilted downward when shaking out the contents 79, it is often desirable for the front zipper tape 61b to be the male zipper tape 61m.

[0132] In this case, the front blank plate 10b on which the male zipper tape 61m is provided is turned down, and the zippered paper container 90 is tilted. As a specific indication, a statement that "this side is turned down" may be written on the front blank plate 10b, particularly on at least one of the front wall plate 31b, the front top plate 33b, and the front upper overlapping plate 34b which constitute a part of the front blank plate 10b. The specific indication is not limited to the specifically described expression as long as it has an equivalent meaning. In FIG. 10, as an example of a specific display, a display saying "Please shake this side down" is displayed on the front top panel 33b.

[0133] Alternatively, a specific indication such as "this side is the top side" may be written on at least one of the rear blank plate 10a, particularly on the rear wall plate 31a, the rear top plate 33a, and the rear upper overlapping plate 34a which constitute a part of the rear blank plate 10a. The specific indication is not limited to the specifically described expression as long as it has an equivalent meaning. In addition, a female zipper tape 61f is provided on the back blank plate 10a. In FIG. 11, as an example of a specific display, a display saying "Please shake it with this side facing up" is displayed on the back top panel 33a.

[0134] In the example of FIG. 10, a specific display is displayed on the front blank plate 10b, and in the example of FIG. 11, a specific display is displayed on the back blank plate 10a. However, a specific display may be displayed on both the front blank plate 10b and the back blank plate 10a. In this way, the visibility of the specific display is improved and the risk of tilting the chuck paper container 90 in the wrong direction when the content 79 of the chuck paper container 90 is dispensed is reduced.

[0135] Conversely, consider the case where the front zipper tape 61b is the female zipper tape 61f and the back zipper tape 61a is the male zipper tape 61m. In this case, the zippered paper container 90 is tilted with the front blank plate 10b facing up. To indicate this, a specific indication such as "this side faces up" may be written on at least one of the front wall plate 31b, the front top plate 33b, and the front upper overlapping plate 34b, which constitute a part of the front blank plate 10b.

[0136] Alternatively, a specific marking stating "this side should be the bottom side" may be written on at least one of the rear wall panel 31a, rear top panel 33a, and rear upper overlapping panel 34a which constitute part of the rear blank panel 10a.

[0137] The description regarding the above-mentioned swinging direction may be provided at least on the front blank plate 10b or the back blank plate 10a, or may be provided on both. The shaking direction may be written somewhere on the outer surface of the resealable paper container 90. The shaking direction is not written on the resealable paper container 90, but may be written on a document attached at the same time.

[0138] Second Embodiment A blank plate 93 of a resealable paper container 90 of this embodiment is shown in FIG. The resealable paper container 90 of this embodiment may be provided with an opening sharp line 19.

[0139] <Opening sharp line> The opening sharp edge line 19 will now be described. The blank plate 93 may be provided with an opening sharp edge line 19. Here, a case will be described in which the front zipper tape 61b is a male zipper tape 61m. Therefore, in this case, when the contents 79 are dispensed, the zippered paper container 90 is tilted with the front blank plate 10b facing downward.

[0140] In this case, the opening sharp line 19 is provided at least on the front blank plate 10b. The opening sharp line 19 is desirably provided on the front blank plate 10b through which the contents 79 pass when the contents 79 are dispensed, and it is desirable that a male zipper tape 61m to which the contents 79 do not easily adhere is joined to the front blank plate 10b. That is, it is desirable that the opening sharp line 19 and the male zipper tape 61 m are provided on the same blank plate 93 .

[0141] In addition, the contents 79 are ejected in a narrow width due to the opening sharp edge 58b, which will be described later, formed by the opening sharp edge line 19. Therefore, when pouring the contents into a bottle or the like with a narrow mouth, the width of the contents ejected can be narrowed, so that the contents 79 can be transferred without spilling.

[0142] In this embodiment, the rear blank plate 10a is also provided with a rear opening sharp edge 19a.

[0143] Here, the opening sharp line 19 provided on the blank plate 93 is provided on the upper overlapping plate 34 and the top plate 33, and its position is approximately the center of the width of the upper overlapping plate 34, and extends approximately vertically in the vertical direction of the zippered paper container 90. This makes it easier to bend the opening sharp line 19. Furthermore, when the contents 79 are shaken out of the resealable paper container 90, the direction in which the contents are shaken out is easier to predict and therefore easier to control.

[0144] The opening sharp line 19 is provided across the entire vertical width of the upper overlapping plate 34 and the top plate 33. That is, it connects from the upper edge 21 to the second horizontal folding line 23 via the first horizontal folding line 22.

[0145] Here, the portion of the opening sharp line 19 existing within the area of ​​the upper overlapping plate 34 is designated as a first opening sharp line 191, and the portion of the opening sharp line 19 existing within the area of ​​the top panel 33 is designated as a second opening sharp line 192.

[0146] The first opening sharp edge line 191 and the second opening sharp edge line 192 may be in contact with each other or may be separated from each other. Furthermore, the first opening sharp edge line 191 and the second opening sharp edge line 192 may be on the same line, or may not be on the same line as long as the function is not impaired.

[0147] The back blank plate 10a and the front blank plate 10b described above, which are aligned and stacked, are joined to produce an intermediate stage paper container with a zipper (flat state) 91 as shown in Figure 19, and then an intermediate stage paper container with a zipper (raised state) 92 (not shown) is produced, and finally the paper container with a zipper 90 is completed. Except for the provision of the opening sharp edge line 19, the laminated sheet 78 of the blank plate 93, the shape of the resealable paper container 90, the assembly method, etc. are the same as those in the first embodiment.

[0148] A perspective view of a resealable paper container 90 of this embodiment is shown in Fig. 20, and a plan view is shown in Fig. 21. The difference from the first embodiment is that an opening sharp edge line 19 is provided. do.

[0149] <Opening for shaking out a paper container with a zipper having an opening sharp line> 22 shows the state in which the top part 71 of the package of the finished zip-lock paper container 90 containing the contents of this embodiment is opened for shaking out. The opening means of the zip-lock paper container 90 is the same as that of the first embodiment.

[0150] In the opened zippered paper container 90 of this embodiment, when the contents 79 are shaken out, the shake-out opening 56 through which the contents 79 pass is surrounded by a front blank plate 10b having a front opening sharp tip 58b at approximately the center in the width direction, and a back blank plate 10a having a back opening sharp tip 58a at approximately the center in the width direction. In addition, the opening sharp edge portion 58 is the intersection of the opening sharp edge line 19 and the easy-open processing line 51 that has been cut and exposed.

[0151] The area through which the contents 79 pass is near the center of the front blank plate 10b, and in this area, the front opening sharp tip 58b has a corner, so the contents 79 are ejected in a narrow width. Therefore, when pouring the contents into a bottle or the like with a narrow mouth, the width of the ejected contents can be narrowed, so that the contents 79 can be transferred without spilling.

[0152] In addition, the presence of the rear opening sharp edge 19a makes the front and back of the shaking opening 56 of the resealable paper container 90 symmetrical, which may be preferred from the standpoint of appearance.

[0153] When the easy-open processing line 51 of the zippered paper container 90 is cut and the zipper tape 61 is opened, the opening sharp line 19 forming the opening sharp portion 58 is not bent, and therefore the opening sharp portion 58 is not sharp. After the zipper tape 61 is opened, the opening sharp line 19 is manually folded in a mountain shape as seen from the outside in the direction in which the inner faces of the blank plates 93 come into contact with each other, thereby making the opening sharp part 58 sharp.

[0154] However, when the direction in which the contents are poured out is such that the zippered paper container 90 is tilted with one of the side panels 32 facing downward to remove the contents (when tilted sideways), since the side edge seal 36 is present below the area through which the contents pass, the area through which the contents pass and the container being poured cannot be brought close together, and there is a risk of the contents spilling.

[0155] Furthermore, in the paper container 90 with a zipper of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being refitted together, so that they can be easily refitted together. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0156] <Third embodiment> A blank plate 93 of a resealable paper container 90 of this embodiment is shown in FIG. The front blank plate 10b of this embodiment is the same as the front blank plate 10b of the second embodiment shown in FIG. 18, and has a front opening sharp edge 19b. The rear blank plate 10a of this embodiment is the same as the rear blank plate 10a of the first embodiment shown in FIG. 4, and is not provided with a rear opening sharp edge line 19a.

[0157] Therefore, the front blank sheet 10b and the back blank sheet 10a are not line-symmetrical, except for the opening sharp edge 19, with the upper edge 21 as the line of symmetry.

[0158] The blank plates 93 are assembled and filled with the contents 79 to complete the package of the chuckable paper container 90. Fig. 24 shows a perspective view of the chuckable paper container 90 with the easy-open processing line 51 of the chuckable paper container 90 cut and the swing-out opening 56 open.

[0159] In the zippered paper container 90 of this embodiment, an opening sharp line 19 is provided on the front side upper overlapping plate 34b and the front side top plate 33b, and the intersection of the front side opening sharp line 19b and the cut front side easy-open processing line 51b forms the front side opening sharp portion 58b.

[0160] When the zippered paper container 90 is tilted with the front wall panel 31b facing downward and the contents 79 are shaken out, the width of the contents being shaken out becomes narrower at the front opening sharp tip 58b.

[0161] Therefore, when pouring contents 79 from the zippered paper container 90 of this embodiment into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so that the contents can be transferred without spilling, and the amount of contents 79 being shaken out can be easily controlled.

[0162] The rear upper overlapping plate 34a and the rear top plate 33a do not have the rear opening sharp line 19a, and therefore the cut-out rear easy-open processing line 51a has no bent portion in the area of ​​the rear upper overlapping plate 34a and is a curved line. Therefore, the appearance (design) of the zippered paper container 90 with the top part 71 opened is different from that of the second embodiment.

[0163] According to the zippered paper container 90 of this embodiment, when the direction in which the contents 79 are ejected is such that the zippered paper container 90 is tilted and removed with the front wall panel 31b facing downwards, the area through which the contents 79 pass is near the center of the front blank plate 10b, and since this area contains the front opening sharp portion 58b having a corner, the contents are ejected in a narrow width.

[0164] Therefore, when pouring contents from the retractable paper container 90 of this embodiment into a bottle or the like with a narrow mouth, the width of the contents being shaken out can be narrowed, so that the contents can be transferred without spilling, and the amount of contents being shaken out can be easily controlled.

[0165] In this embodiment, there is no indication by letter or the like as to the tilt direction when shaking out the contents 79 from the zippered paper container 90. However, since the opening sharp line 19 has only the front opening sharp line 19b, it is clear that the front blank plate 10b is to be shaken out with the bottom side. In this case, the front opening sharp line 19b is a specific indication.

[0166] As another embodiment of the present invention, an example in which a text display is provided on the front top panel 33b is shown. Fig. 25 shows a perspective view of the chuck-equipped paper container 90 in a state in which the chuck-equipped paper container 90 is cut along the easy-open processing line 51 and the swing-out opening 56 is open. In this embodiment, since the paper container has a letter indication, the direction in which the resealable paper container 90 should be tilted is clearer.

[0167] Furthermore, in the paper container 90 with a zipper of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being refitted together, so that they can be easily refitted together. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0168] <Modification 1 of the second and third embodiments> The present modified example 1 will be described with reference to Fig. 26. Fig. 26 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

[0169] The front-side opening sharp edge line 19b is present on both the front-side upper overlapping plate 34b and the front-side top plate 33b, similarly to the second embodiment.

[0170] However, the front side first opening sharp line 191b does not extend over the entire vertical width of the front side upper overlapping plate 34b, but exists partially. In Fig. 26, the front side first opening sharp line 191b is in contact with the front side first horizontal folding line 22b, but is not in contact with the front side upper edge portion 21b. Alternatively, although not shown, the front side first opening sharp edge line 191b does not have to be in contact with both the front side first horizontal fold line 22b and the front side upper edge portion 21b.

[0171] 26, the front side second opening sharp edge line 192b is in contact with the front side first horizontal bending line 22b and the front side second horizontal bending line 23b.

[0172] In addition, the rear blank plate 10a, which cannot be seen in FIG. 26, does not have the rear opening sharp edge line 19b. However, the back blank plate 10a may be provided with a back opening sharp edge line 19a similar to the front opening sharp edge line 19b.

[0173] The dimensions, shapes, materials, etc., except for the opening sharp edge 19, are the same as those in the first embodiment.

[0174] In the zippered paper container 90 of this variant example 1, the front opening sharp line 19b is shorter than in the second and third embodiments, but depending on the contents 79, application, material of the blank plate 93, etc., a sufficiently sharp shape of the front opening sharp portion 58b can be obtained.

[0175] Therefore, when pouring contents 79 from a paper container 90 with a zipper into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so that the contents 79 can be poured without spilling, and the amount of contents 79 being shaken out can be easily controlled.

[0176] Furthermore, since the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-engaged, the zipper tapes 61 can be easily re-engaged. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0177] <Modification 2 of the second and third embodiments> The present modified example 2 will be described with reference to Fig. 27. Fig. 27 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

[0178] The difference between the second and third embodiments is that the front side first opening sharp line 191b exists across the entire vertical width of the front side upper overlapping plate 34b, i.e., the front side first opening sharp line 191b connects the front side upper edge portion 21b and the front side first horizontal fold line 22b, and there is no front side second opening sharp line 192b.

[0179] In this embodiment, the rear blank plate 10a, which cannot be seen in FIG. 27, is not provided with the rear opening sharp edge line 19b. However, the back blank plate 10a may be provided with a back opening sharp edge line 19a similar to the front opening sharp edge line 19b.

[0180] The dimensions, shapes, materials, etc., except for the opening sharp edge 19, are the same as those in the first embodiment.

[0181] In the zippered paper container 90 of this Example 2, the front opening sharp line 19b is shorter than those of the second and third embodiments, but depending on the contents 79, application, material of the blank plate 93, etc., a sufficiently sharp shape of the front opening sharp portion 58b can be obtained. In particular, since the front side first opening sharp line 191b exists at the front side zipper tape joint portion 52b which is difficult to bend, the front side opening sharp line 19b is easily bent over its entirety, and the front side opening sharp portion 58b is easily formed.

[0182] Therefore, when pouring the contents 79 into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so that the contents 79 can be poured without spilling, and the amount of the contents 79 being shaken out can be easily controlled.

[0183] Furthermore, since the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-engaged, the zipper tapes 61 can be easily re-engaged. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0184] <Modification 3 of the second and third embodiments> The third modification will be described with reference to Fig. 28. Fig. 28 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

[0185] The difference between the second and third embodiments is that the front side first opening sharp line 191b connects the front side easy-open processing line 51b and the front side first horizontal fold line 22b in the vertical direction of the front side upper overlapping plate 34b, and further, there is no front side second opening sharp line 192b.

[0186] In addition, the rear blank plate 10a, which cannot be seen in FIG. 28, does not have the rear opening sharp edge line 19b. However, the back blank plate 10a may be provided with a back opening sharp edge line 19a similar to the front opening sharp edge line 19b.

[0187] The dimensions, shapes, materials, etc., except for the opening sharp edge 19, are the same as those in the first embodiment.

[0188] In the zippered paper container 90 of this Example 3, the front opening sharp line 19b is shorter than those of the second and third embodiments, but depending on the contents 79, application, material of the blank plate 93, etc., a sufficiently sharp shape of the front opening sharp portion 58b can be obtained. In particular, since the front side first opening sharp line 191b exists at the front side zipper tape joint portion 52b which is difficult to bend, the front side opening sharp line 19b is easily bent over its entirety, and the front side opening sharp portion 58b is easily formed.

[0189] Therefore, when pouring the contents 79 into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so that the contents 79 can be poured without spilling, and the amount of the contents 79 being shaken out can be easily controlled.

[0190] In addition, the opening sharp line 19 does not exist in the portion of the upper overlapping plate 34 that is cut along the easy-open processing line 51. That is, the opening sharp line 19 does not exist in an area that becomes unnecessary when the zipper tape 61 is opened, so there is no waste in processing the opening sharp line 19 compared to the second modification.

[0191] Furthermore, since the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-engaged, the zipper tapes 61 can be easily re-engaged. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0192] <Modification 4 of the second and third embodiments> The fourth modification will be described with reference to Fig. 29. Fig. 29 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

[0193] The difference between the second and third embodiments is that there is no front-side first opening sharp line 191b. The front-side second opening sharp line 192b exists over the entire vertical width of the front-side top panel 33b, that is, the front-side second opening sharp line 192b connects the front-side first horizontal folding line 22b and the front-side second horizontal folding line 23b.

[0194] In addition, the rear blank plate 10a, which cannot be seen in FIG. 29, does not have the rear opening sharp edge line 19b. However, the back blank plate 10a may be provided with a back opening sharp edge line 19a similar to the front opening sharp edge line 19b.

[0195] The dimensions, shapes, materials, etc., except for the opening sharp edge 19, are the same as those in the first embodiment.

[0196] In the zippered paper container 90 of this variant example 4, the front opening sharp line 19b is shorter than those of the second and third embodiments, but depending on the contents 79, application, material of the blank plate 93, etc., a sufficiently sharp shape of the front opening sharp portion 58b can be obtained.

[0197] Therefore, when pouring the contents 79 into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so that the contents 79 can be poured without spilling, and the amount of the contents 79 being shaken out can be easily controlled.

[0198] In particular, the front side first opening sharp line 191b does not exist at the front side zipper tape joint portion 52b. Therefore, when the blank plate 93 and the zipper tape 61 are joined, there is less risk of the joining of the zipper tape 61 being hindered by unevenness of the blank plate 93 caused by the front side first opening sharp line 191b.

[0199] Furthermore, since the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being re-engaged, the zipper tapes 61 can be easily re-engaged. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0200] <Fourth embodiment> The present embodiment will be described with reference to Fig. 30. Fig. 30 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced. The resealable paper container 90 of this embodiment may be provided with an opening assistance line 55.

[0201] <Opening auxiliary line> The opening auxiliary line 55 will be described. An opening assistance line 55 may be provided on the blank plate 93 on which the male zipper tape 61m is provided. Here, a case will be described in which the front zipper tape 61b is a male zipper tape 61m. Therefore, in this case, when the contents 79 are dispensed, the zippered paper container 90 is tilted with the front blank plate 10b facing downward.

[0202] In this case, the opening assist line 55 is provided at least on the front blank plate 10b. The opening assist line 55 is desirably provided on the front blank plate 10b on the side through which the contents 79 pass when the contents 79 are dispensed, and it is desirable that a male zipper tape 61m to which the contents 79 do not easily adhere is joined to the front blank plate 10b.

[0203] In the zippered paper container 90 of this embodiment, which is formed in the same manner as in the first embodiment, a front opening auxiliary line 55b may be provided on the front top panel 33b and / or the front top protrusion (ear) portion 38b and / or the front top side panel 41b. Additionally, a sharp edge 19b of the front opening may be provided in the same manner as in the second embodiment.

[0204] Here, the intersection point between the front side opening sharp line 19b or a downward extension of the front side opening sharp line 19b and the front side second horizontal folding line 23b is defined as the lower end reference point Lb of the front side opening sharp line 19b.

[0205] The front-side opening auxiliary line 55b connects the reference point Lb of the lower end of the front-side opening sharp line 19b or its vicinity to the intersection of the lower edge of the front-side zipper tape 61b and the first vertical folding line 12b of the front side or its vicinity. Alternatively, it may be partially located on the connecting line.

[0206] Consider a case where the top 71 of a zippered paper container 90 is opened, the front opening sharp line 19b is folded inward when viewed from the outside, and the zippered paper container 90 is tilted so that the front wall panel 31b faces downward, and the contents 79 are poured out.

[0207] In this case, if the above-mentioned front opening auxiliary line 55b is present, the front upper overlapping plate 34b and / or the front top side plate 41b and / or the front top panel 33b and / or the front top protruding portion (ear portion) margin 38b are easily deformed appropriately.

[0208] An inner end 551b of the front side opening auxiliary line 55b may be located at or near the reference point Lb on the lower end side of the front side opening sharp edge line 19b.

[0209] In addition, the zipper tape 61 and the zipper tape joint 52 are joined, and are rigid, making them difficult to bend. Furthermore, in order to enlarge the opening of the top portion 71, the opening of the top portion 71 is opened up to the seal margins 36 on both side edges. The outer end 552b of the front side opening assistance line 55b is located at or near the intersection of the lower edge of the zipper tape 61 and the front side first vertical folding line 12b, making it easy to enlarge the opening of the top portion 71.

[0210] In this embodiment, the rear blank plate 10a, which cannot be seen in FIG. 30, is not provided with the rear opening auxiliary line 55a and the rear opening sharp line 19a. However, the rear blank plate 10a may be provided with a rear opening auxiliary line 55b and a rear opening sharp line 19a, similar to the front blank plate 10b.

[0211] The shape, material, processing method, etc. of other parts are the same as those of the first embodiment.

[0212] In the zippered paper container 90 of this embodiment, the opening assistance line 55 stabilizes the shape of the shaking opening 56, increases the dimension in the depth direction, and reduces the dimension in the width direction, resulting in a shape that makes it easy to shake out the contents 79.

[0213] Furthermore, in the resealable paper container 90 of this embodiment, the front-side opening sharp edge line 19b allows the front-side opening sharp edge portion 58b to have a sharp shape. Therefore, when pouring contents 79 from the zippered paper container 90 of this embodiment into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so that the contents 79 can be poured without spilling, and the amount of contents 79 being shaken out can be easily controlled.

[0214] Furthermore, in the zippered paper container 90 of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being refitted together, so the zipper tape 61 can be easily refitted. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0215] <Fifth embodiment> This embodiment will be described with reference to Fig. 31. Fig. 31 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

[0216] In the zippered paper container 90 of this embodiment, a front-side opening assistance line 55b is provided on the front-side top panel 33b and the front-side top protruding portion (edge ​​portion) margin 38b. Also, a sharp edge 19b of the front opening is provided similarly to the second embodiment.

[0217] The front-side opening auxiliary line 55b connects the reference point Lb of the lower end of the front-side opening sharp line 19b or its vicinity to the first top intersection point Eb of the front-side first vertical folding line 12b and the second horizontal folding line 23b or its vicinity. Alternatively, it is partially present on the connecting line.

[0218] Consider a case in which the top 71 of a zippered paper container 90 is opened, the front opening sharp line 19b is folded inward when viewed from the outside, and the zippered paper container 90 is tilted so that the front wall panel 31b faces downward, and the contents are poured out.

[0219] In this case, if the above-mentioned front opening auxiliary line 55b is present, the front upper overlapping plate 34b and / or the front top side plate 41b and / or the front top panel 33b and / or the front top protruding portion (ear portion) margin 38b are easily deformed appropriately.

[0220] An inner end 551b of the front side opening auxiliary line 55b may be located at or near the reference point Lb on the lower end side of the front side opening sharp edge line 19b.

[0221] In addition, since the front opening auxiliary line 55b does not exceed the front second horizontal folding line 23b, the number of intersections of the folding lines can be reduced, resulting in a simple appearance. Furthermore, it is easy to appropriately fold the folding lines in the peripheral area where the front opening auxiliary line 55b and the front second horizontal folding line 23b are close to or in contact with each other.

[0222] In order to enlarge the opening of the top portion 71, the opening of the top portion 71 is opened up to the side edge seal margins 36 on both sides. For this purpose, the outer end 552b of the front side opening auxiliary line 55b may be located at the front side first top portion intersection point Eb or in its vicinity.

[0223] In this embodiment, the rear blank plate 10a, which cannot be seen in FIG. 31, is not provided with the rear opening auxiliary line 55a and the rear opening sharp line 19a. However, the rear blank plate 10a may be provided with a rear opening auxiliary line 55b and a rear opening sharp line 19a, similar to the front blank plate 10b.

[0224] The shape, material, processing method, etc. of other parts are the same as those of the first embodiment.

[0225] In the zippered paper container 90 of this embodiment, the opening assistance line 55 stabilizes the shape of the shaking opening 56, increases the dimension in the depth direction, and reduces the dimension in the width direction, resulting in a shape that makes it easy to shake out the contents 79.

[0226] Furthermore, in the resealable paper container 90 of this embodiment, the front-side opening sharp edge line 19b allows the front-side opening sharp edge portion 58b to have a sharp shape.

[0227] Therefore, when pouring contents 79 from the zippered paper container 90 of this embodiment into a bottle or the like with a narrow mouth, the width of the contents 79 being shaken out can be narrowed, so that the contents 79 can be poured without spilling, and the amount of contents 79 being shaken out can be easily controlled.

[0228] Furthermore, in the zippered paper container 90 of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being refitted together, so the zipper tape 61 can be easily refitted. Therefore, the zipper tape 61 can be repeatedly opened and closed stably.

[0229] The above has mainly described the method of creating the blank plate 93 in terms of the front blank plate 10b. However, as the shape of the back blank plate 10a is the same, it is symmetrical about the upper edges 21a, 21b, and the manufacturing method is the same, so a description of the back blank plate 10a will be omitted. However, the opening sharp line 19 and the opening auxiliary line 55 may be different between the front blank sheet 10b and the back blank sheet 10a.

[0230] Sixth embodiment This embodiment will be described with reference to Fig. 32. Fig. 32 shows the shape of a paper container (in a flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced.

[0231] The resealable paper container 90 of this embodiment is a resealable paper container 90 in which the opening sharp line 19 is omitted from the resealable paper container 90 of the fifth embodiment, and an opening assistance line 55 is provided. The shape, material, processing method, etc. of other parts are the same as those of the fifth embodiment.

[0232] In this embodiment, since the opening sharp line 19 is not provided, the opening sharp portion 58 formed by the opening sharp line 19 is not provided. However, the opening assistance line 55 stabilizes the shape of the shaking opening 56, increases the dimension in the depth direction and decreases the dimension in the width direction, resulting in a shape that makes it easy to shake out the contents 79.

[0233] Furthermore, in the zippered paper container 90 of this embodiment, the contents 79 do not hinder the male zipper tape 61m and the female zipper tape 61f from being refitted together, so the zipper tape 61 can be easily refitted. Therefore, the zipper tape 61 can be repeatedly opened and closed stably. EXAMPLES

[0234] The present disclosure will now be described more specifically with reference to examples. <Example 1> In Example 1, a paper container 90 with a zipper having the configuration shown in FIG. 7 was produced using a blank plate 93 in FIG. 4 corresponding to the first embodiment.

[0235] Two blank sheets 10a, 10b as shown in Fig. 4 were prepared, and the inner surfaces of the blank sheets 10a, 10b were aligned and overlapped, and the side edge seal portions 36 of the opposing sides were heat-sealed as shown in Fig. 5, and the upper seal portion 53 was also heat-sealed. At the same time, the zipper tape 61 was also heat-sealed. In this way, a paper container with a zipper (in a flat state) 91 in the intermediate stage in which the bottom seal portion 37 was not sealed was produced.

[0236] Next, it was raised into a three-dimensional shape as shown in FIG. 6 to produce a paper container with a zipper in an intermediate stage (standing state) 92 with an open bottom 73, and then the paper container with a zipper 90 of Example 1 was produced.

[0237] The laminated sheet 78 of the blank plate 93 had the following structure (see FIG. 13(d)). (Outer side) Printing layer (gravure printing) / Paper base layer 782 (Nippon Paper Bleached Kraft (S) 120g / m 2 ) / Intermediate adhesive layer 784 (EMAA 20μm Mitsui Dow Polychemical N0908N) / Barrier layer 785 (silica-deposited PET 12μm Dai Nippon Printing IB-PET-UBP) / The innermost thermoplastic resin layer is 783 (LDPE 40μm Japanese polyethylene LC520) (Inner side)

[0238] A method for producing the laminated sheet 78 will now be described. First, a barrier layer 785 (silica-deposited PET 12 μm) was laminated on the inner surface of the paper base layer 782 by extrusion lamination (sandwich lamination) with a molten intermediate adhesive layer 784 (EMAA 20 μm) interposed therebetween.

[0239] Next, on the opposite side (inner side) of the paper base layer 782 of the barrier layer 785, an innermost thermoplastic resin layer 783 (LDPE 40 μm) was formed by extrusion lamination. Next, a design was printed on the outer surface of the paper base layer 782 using a gravure printing machine.

[0240] In order to improve the bonding strength between the bonding layers, anchor coat treatment, corona treatment, flame treatment, etc. may be performed as necessary. Alternatively, ozone treatment may be performed on the molten resin.

[0241] Then, on the front side of the paper base layer 782, in the same process as the images, etc., a message saying "Please place this side up" was printed by gravure printing in the area intended to become the back top panel 33a of the blank plate 93.

[0242] Next, the laminated sheet 78 was subjected to scoring and punching to complete a blank plate 93 .

[0243] The zipper tape 61 that is heat-sealed to the inner surface of the upper overlapping plate 34 and the top side plate 41 of the zipper-equipped paper container 90 has a two-layer structure in which the zipper tape body 62 that is heat-sealed is made up of both the male zipper tape 61m and the female zipper tape 61f.

[0244] The zipper tape 61 has a resin layer formed of LLDPE on the side to be heat sealed to the zippered paper container 90, and a resin layer formed of MDPE on the opposite side. In addition, the male zipper tape fitting portion 63m and the female zipper tape fitting portion 63f are both formed of LLDPE, and the width of the zipper tape body portions 62 is both 13 mm.

[0245] In this embodiment, the front zipper tape 61b is a male zipper tape 61m and the back zipper tape 61a is a female zipper tape 61f, and the zipper tapes 61m, 61f are joined to the blank plate 93 at predetermined positions.

[0246] Here, the grain of the paper base layer 782 will be described. The grain of the paper base layer 782 is parallel or perpendicular to the longitudinal direction of the zipper tape 61. In this embodiment, the grain of the paper base layer 782 is parallel.

[0247] The rear blank plate 10a and the front blank plate 10b are rectangular, measuring 220 mm in length and 169 mm in width, and have side edge seal margins 36 of 7 mm width provided on both left and right side edges 11 as seal margins at the peripheral edges.

[0248] Additionally, the lower edges 26 were each provided with a bottom seal margin 37 having a width of 10 mm. Further, a seal margin of an upper seal portion 53 having a width of 4 mm was provided near the upper edge portion 21 of the upper overlapping plate 34 and the side plate 41 of the top portion.

[0249] The blank plate 93 is provided with, in the order listed below from the upper edge 21, an upper overlapping plate 34, a first horizontal folding line 22, a top panel 33, a second horizontal folding line 23, a wall panel 31, a third horizontal folding line 24, and a bottom panel 35.

[0250] Additionally, on the outer sides of both the left and right sides of the upper overlapping plate 34, top side plates 41 are provided via the second vertical folding line 13.

[0251] Additionally, on the outer sides of both the left and right sides of the top panel 33, there are provided top side protrusions (ears) 38 via the second vertical folding lines 13.

[0252] In addition, side panels 32 are provided on the outside of both left and right sides of the wall panel 31 via second vertical folding lines 13.

[0253] In addition, bottom side protrusions (ears) 43 are provided on the outside of both left and right sides of the bottom panel 35 via the second vertical folding lines 13.

[0254] In addition, a top protrusion (ear) space 38 is connected to the lower side of the top side panels 41 on both the left and right sides via the first horizontal folding line 22.

[0255] The side panel 32 is connected to the lower side of the top protruding portion (ear portion) space 38 via the second horizontal folding line 23.

[0256] A bottom protrusion (ear) portion 43 is connected to the lower side of the side panel 32 via the third horizontal bending line 24.

[0257] A bottom seal portion 37 is connected to the lower side of the bottom plate 35 and the bottom protrusions (ears) 43 on both the left and right sides.

[0258] Furthermore, on the upper overlapping plate 34 and the top side plate 41, an easy-open processing line 51 (here a perforation line) is printed in the transverse direction on the paper base layer 782 of the laminated sheet 78 as a means for opening the container, at a position 8 mm below the upper edge 21, which becomes the upper edge when the inner surfaces of the two blank plates 10a, 10b are aligned and overlapped, as shown in Figure 5. In addition, the perforation line of the easy-to-open processing line 51 may be processed before the paper base layer 782 is extrusion laminated.

[0259] Also, below the easy-open processing line 51, zipper tapes 61 (13 mm wide) were heat-sealed to the inner surfaces of the upper overlapping plate 34 and each of the top side plates 41 with a gap of 3 mm.

[0260] In addition, after joining the two blank sheets 10a, 10b, heat sealing the zipper tape 61, heat sealing the side edge seal portion 36, and heat sealing the upper seal portion 53 in the above-mentioned manner, a notch 77 was provided on the side edge portion 11 on the right side of the easy-open processing line 51, and a zippered paper container (flat state) 91 in the intermediate stage with the bottom 73 in an unsealed state was produced (see FIG. 5).

[0261] Next, a mandrel was inserted into this intermediate stage paper container with a zipper (flat state) 91 from the unsealed opening of the bottom 73, leaving the upper overlapping plate 34, and the top plate 33 below it was spread back and forth along the first horizontal folding line 22, so that the upper overlapping plate 34 stood upright. Below that was the top part 71 made of the top plate 33, and further the body part 72 whose horizontal cross section (plane approximately parallel to the bottom surface) is approximately rectangular, forming an intermediate stage paper container with a zipper (standing state) 92 with a bottom 73 opening in an approximately rectangular shape (see FIG. 6).

[0262] Then, the overlapped upper overlapping plate 34 was folded toward the back top plate 33a. The upper overlapping plate 34 bent toward the rear top panel 33a is a part of the components of the top portion 71.

[0263] Furthermore, the top side protrusions (ears) 74 connected to both the left and right sides of the top 71 of the resealable paper container 90 were joined to the body 72 of the resealable paper container 90. This joining was performed by joining the paper base layer 782 on the surface below the top side protrusions (ears) 74 and the paper base layer 782 on the surface of the body 72 using hot melt.

[0264] The completed paper container 90 with a zipper was formed into a substantially rectangular parallelepiped shape with dimensions of 95 mm in width, 120 mm in height, and 60 mm in depth.

[0265] <Example 2> In Example 2, the paper container with a zipper 90 described in the second embodiment was produced. A blank plate 93 shown in Fig. 18 was prepared. Then, an intermediate stage with a zipper (flat state) 91 shown in Fig. 19 was produced, and then the paper container with a zipper 90 shown in Fig. 20 was produced. Apart from the provision of the opening sharp line 19, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper 90 were the same as in Example 1.

[0266] <Example 3> In Example 3, the paper container 90 with a zipper described in the third embodiment was produced. A blank plate 93 shown in Fig. 23 was prepared, and a paper container 90 with a zipper (not shown) was produced. The shape of the blank plate 93, the laminated sheet 78, and the method of producing the paper container with a zipper were the same as those in Example 1, except that the front opening sharp line 19b was provided.

[0267] <Example 4> In Example 4, a paper container 90 with a zipper as described in Modification 1 of the third embodiment was produced. A blank plate 93 was prepared as a precursor to forming a paper container 91 with a zipper in the intermediate stage (flat state) shown in Fig. 26. Then, a paper container 90 with a zipper (not shown) was produced.

[0268] In this embodiment, the front opening sharp line 19b was provided only on the front blank plate 10b, and the back blank plate did not have the back opening sharp line 19a. Except for providing the front opening sharp line 19b, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as those in Example 1.

[0269] <Example 5> In Example 5, a paper container 90 with a zipper as described in Modification 2 of the second embodiment was produced. A blank plate 93 was prepared as a precursor to forming a paper container 91 with a zipper in the intermediate stage (flat state) shown in Fig. 27. Then, a paper container 90 with a zipper (not shown) was produced.

[0270] In this embodiment, the front blank plate 10b was provided with a front opening sharp line 19b, and the back blank plate was provided with a back opening sharp line 19a having a similar shape to the front opening sharp line 19b. Except for the provision of the opening sharp line 19, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as those in Example 1.

[0271] <Example 6> In Example 6, a paper container 90 with a zipper as described in Modification 3 of the third embodiment was produced. A blank plate 93 was prepared as a precursor to forming a paper container 91 with a zipper in the intermediate stage (flat state) shown in Fig. 28. Then, a paper container 90 with a zipper (not shown) was produced.

[0272] In this embodiment, the front opening sharp line 19b was provided only on the front blank plate 10b, and the back blank plate did not have the back opening sharp line 19a. Except for providing the front opening sharp line 19b, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as those in Example 1.

[0273] <Example 7> In Example 7, a paper container 90 with a zipper as described in Modification 4 of the second embodiment was produced. A blank plate 93 was prepared as a precursor to forming a paper container 91 with a zipper in the intermediate stage (flat state) shown in Fig. 29. Then, a paper container 90 with a zipper (not shown) was produced.

[0274] In this embodiment, the front blank plate 10b was provided with a front opening sharp line 19b, and the back blank plate was provided with a back opening sharp line 19a having a similar shape to the front opening sharp line 19b. Except for the provision of the opening sharp line 19, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as those in Example 1.

[0275] <Example 8> In Example 8, the paper container 90 with a zipper described in the fourth embodiment was produced. A blank plate 93 was prepared as a precursor to forming the paper container with a zipper (flat state) 91 in the intermediate stage shown in Fig. 30. Then, the paper container 90 with a zipper (not shown) was produced.

[0276] In this embodiment, the front blank plate 10b was provided with a front opening sharp line 19b and two (a pair) front opening auxiliary lines 55b. Furthermore, the back blank plate 10a was provided with a back opening sharp line 19a and two (a pair) back opening auxiliary lines 55a having the same shape as the front opening sharp line 19b and the two (a pair) front opening auxiliary lines 55b. Furthermore, except for the provision of the opening sharp line 19 and the opening auxiliary line 55, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as those of the first embodiment.

[0277] <Example 9> In Example 9, the paper container 90 with a zipper described in the fifth embodiment was produced. A blank plate 93 was prepared as a precursor to forming the paper container 91 with a zipper in the intermediate stage (flat state) shown in Fig. 31. Then, the paper container 90 with a zipper (not shown) was produced.

[0278] In this embodiment, the front opening sharp line 19b and two (a pair) front opening auxiliary lines 55b were provided only on the front blank plate 10b. However, the rear opening sharp line 19a and the rear opening auxiliary line 55a were not provided on the rear blank plate 10a. Except for providing the front opening sharp line 19b and the front opening auxiliary line 55b, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as those of Example 1.

[0279] <Example 10> In Example 10, the paper container 90 with a zipper described in the sixth embodiment was produced. A blank plate 93 was prepared as a precursor to forming the paper container with a zipper (flat state) 91 in the intermediate stage shown in Fig. 32. Then, the paper container 90 with a zipper (not shown) was produced.

[0280] In this embodiment, two (a pair) front opening assist lines 55b were provided only on the front blank plate 10b. However, the back opening assist line 55a was not provided on the back blank plate 10a. Except for providing the front opening assist lines 55b, the shape of the blank plate 93, the laminated sheet 78, and the manufacturing method of the paper container with a zipper were the same as those in the first embodiment.

[0281] <Comparative Example> In the comparative example, a blank plate 81 shown in FIG. 1 was prepared, and a paper container 80 with a zipper shown in FIG. 2 was produced.

[0282] 3 and 12, a male zipper tape 861m was provided on the front zipper tape 861b, and a female zipper tape 861f was provided on the back zipper tape 861a. The manufacturing methods of the laminated sheet 88 and the paper container 80 with a zipper were the same as those in the first embodiment. Furthermore, there was no indication on the resealable paper container 80 as to the direction in which the resealable paper container 80 could be tilted when shaking out the contents.

[0283] <Evaluation> 100 pieces of each of the paper containers with zippers of Examples 1 to 10 and the Comparative Example were produced. In addition, when manufacturing the chuck-equipped paper container 80 of the comparative example, there was a process of folding the blank plate 81 at the middle horizontal folding line (half folding line) 821. (See FIG. 1.) In this process, an incident was observed in which the adjacent easy-to-open processing line (perforation line) 851 was folded by mistake. When the easy-to-open processing line (perforation line) 851, which should not be folded, was folded, the blank plate 81 became a defective product, resulting in a loss.

[0284] This is because the easy-open processing line (perforation line) 851 has many cut portions (including half cuts) to ensure easy opening, making it easy to fold unintentionally. The ease of folding the easy-open processing line (perforation line) 851 is often about the same as the ease of folding the middle horizontal fold line (half fold line) 821, and when the zipper-equipped paper container 80 is manufactured, the middle horizontal fold line (half fold line) 821 is folded carefully, but the adjacent easy-open processing line (perforation line) 851 may be folded by mistake.

[0285] Furthermore, if one tries to fold the middle horizontal folding line (half folding line) 821 more carefully, the time required to manufacture the resealable paper container 80 increases. As a result, the production capacity of the resealable paper container 80 may decrease.

[0286] In contrast, in the present disclosure, in which a zippered paper container 90 is produced by joining two blank plates 10a, 10b, there is no intermediate horizontal fold line, and therefore no process for folding the intermediate horizontal fold line, so that the defect of accidentally folding the easy-open processing line (perforation line) 851 as described above does not occur. Therefore, in the retractable paper container 90 of the present disclosure, the production capacity does not decrease, and the occurrence of defects can be reduced.

[0287] The zippered paper containers 90 of Examples 1 to 10 prepared as described above were filled with wheat flour as the contents from the bottom 73. Next, the bottom 73 was folded in, the bottom seal tab 37 was heat sealed, and the heat-sealed part was laid down toward the back bottom panel 35a.

[0288] Furthermore, the bottom protrusions (ears) 75 protruding from both the left and right sides of the bottom 73 of the zippered paper container 90 were folded toward the bottom plate 35. Furthermore, they were joined to the front side bottom plate 35b and / or the front side bottom seal portion 37b with an adhesive (hot melt), completing the packaging of the zippered paper container 90 having a substantially rectangular parallelepiped shape. The protruding portion (edge) 74 on the top side of the resealable paper container 90 was also bonded to the body 72 with adhesive (hot melt) before filling it with wheat flour.

[0289] Furthermore, the comparative paper container 80 with a zipper was filled with wheat flour as the contents from the bottom 873. Next, the bottom 873 was folded in, and the bottom seal tab 837 was heat-sealed, and the heat-sealed part was laid down toward the rear bottom plate 835a.

[0290] Furthermore, the bottom protrusions (ears) protruding from both the left and right sides of the bottom 873 of the chucked paper container 80 of the comparative example were folded toward the bottom plate 835. Furthermore, they were joined to the front side bottom plate 835b and / or the front side bottom seal portion 837b with adhesive (hot melt), completing the package of the chucked paper container 80 having a substantially rectangular parallelepiped shape. In addition, the top protrusion (edge) 874 of the chuck-equipped paper container 80 of the comparative example was also bonded to the body 872 with adhesive (hot melt) before filling it with wheat flour.

[0291] In addition, the packages of the zippered paper containers 90 of Examples 1 to 10 prepared as described above and the package of the zippered paper container 80 of the comparative example were tested for their openability, suitability for shaking out the contents, and resealability using zipper tape.

[0292] In the packaging of the zippered paper container 90 of Examples 1 to 10, the upper seal portion 53 is easily cut off by the easy-open processing line 51 provided as an opening means on the upper overlapping plate 34 and the upper part of the side plate 41 of the top part, and the notch 77 provided at one end of the easy-open processing line, thereby forming the shaking opening 56.

[0293] Next, the opening gripping portion 57 of the opened swing-out opening 56 was gripped and pulled apart to both sides, whereby the engagement of the zipper tape 61 could be easily released. In addition, the opening 56 for shaking out at the top of the package of the paper container 90 with a zipper was opened across substantially the entire width of the paper container 90 with a zipper.

[0294] Next, the opening sharp line 19 of the resealable paper container 90 of Examples 2 to 9 was folded in a mountain shape when viewed from the outside of the resealable paper container 90, and an opening sharp portion 58 was provided at the shaking opening 56. Even if the opening sharp line 19 is not in contact with the easy-open processing line 51, the opening sharp line 19 extends above it and bends, so that the opening sharp portion 58 is formed.

[0295] Furthermore, the opening assistance lines 55 of the zippered paper containers 90 of Examples 8 to 10 were folded in a mountain shape when viewed from the outside of the zippered paper container 90. Also, when the shaking opening 56 was opened, the upper overlapping plate 34 and / or the top side plate 41 and / or the top panel 33 and / or the top protruding portion (ear) margin 38 were able to deform more smoothly because the opening assistance lines 55 were bent appropriately.

[0296] In Examples 1 to 10, the zippered paper container 90 was tilted so that the front blank plate 10b was facing downward, i.e., so that the male zipper tape 61m, which is the front zipper tape 61b, was facing downward, and some of the flour was shaken out.

[0297] Thereafter, the resealable paper container 90 was returned to its original position, the resealable tape 61 was reattached, and the resealable paper container 90 was resealed successfully, allowing the remaining flour to be properly stored.

[0298] In addition, in the resealable paper container 90 of Examples 2 to 9, the flour was spun out in a narrow width from the opening sharp portion 58, which has a corner (or a curve with a small radius of curvature) formed by the opening sharp line 19, and was therefore easily transferred to a table bottle.

[0299] Furthermore, the opening assistance lines 55 of the zippered paper containers 90 of Examples 8 to 10 stabilized the shape of the shaking opening 56, and the shaking opening 56 became larger in the depth direction and smaller in the width direction, making it easier to shake out the flour.

[0300] On the other hand, in the package of the chuck-equipped paper container 80 of the comparative example, the easy-open processing line 851 was also cut to form the shaking opening 856. Then, the zipper tape 861 was released, and the opening 856 for shaking out at the top of the package of the zippered paper container 80 was opened across substantially the entire width of the zippered paper container 90.

[0301] Then, the zippered paper container 80 was tilted so that the blank plate 81b of the front side portion was facing downward, that is, so that the female zipper tape 61f, which is the front side zipper tape 861b, was facing downward, and some of the flour was shaken out.

[0302] Thereafter, the inclination of the zipper-equipped paper container 80 was returned to its original position, and the zipper tape 861 was visually inspected. As a result, wheat flour had entered and accumulated in the recess of the female zipper tape fitting portion 863f.

[0303] Thereafter, when an attempt was made to reseal the zippered paper container 80 by refitting the zipper tape 861, there were cases in which the flour accumulated in the recess of the female zipper tape fitting portion 863f prevented the zipper tape from being refitted again, and as a result, the zippered paper container 80 could not be resealed satisfactorily, and the remaining flour could not be stored appropriately.

[0304] Furthermore, in the retractable paper containers 90 of Examples 1 to 10, the paper mass ratio to the total mass of the paper container was approximately 60% by mass, which fully satisfied the standard of 51% by mass or more for paper containers. [Explanation of symbols]

[0305] 10a Back blank plate 10b Front blank plate 11 Side edge 12 First vertical fold line 13 Second vertical fold line 17 Top side diagonal fold line 18 Bottom diagonal fold line 19 Opening sharp line 191 First opening sharp line 192 Second opening sharp line 21 Upper edge 22 First horizontal fold line 23 Second horizontal fold line 24 Third horizontal fold line 25 Fourth horizontal fold line 26 Lower edge 31 Wall Panel 32 Side plate 33 Top plate 34 Upper overlapping plate 35 Bottom plate 36 Side edge seal allowance 37 Bottom seal 38 Top protruding part (ear) allowance 41 Side plate of the top 43 Bottom side protruding part (ear) allowance 51 Easy-open processed wire 52 Zipper tape joint 53 Upper seal part 55 Opening auxiliary line 551 Inner end of opening auxiliary line 552 Outer end of opening auxiliary line 56 Swing-out opening 57 Opening grip 58 Opening tip 61 Zipper Tape 61a Back zipper tape 61b Outer zipper tape 61m Male Zipper Tape 61f Female zipper tape 62 Zipper Tape Body 62a Back zipper tape body 62b Front zipper tape body 62m Male zipper tape body 62f Female zipper tape body 63 Zipper tape fitting 63a Back zipper tape fitting 63b Front zipper tape fitting 63m Male zipper tape fitting 63f Female zipper tape fitting 71 Top of zippered paper container 72 Body of a paper container with a zipper 72d Ridge of the torso 73 Bottom of zippered paper container 74 Top protruding part (ear) 75 Bottom protrusion (ear) 77 Notch 78 Laminated Sheet 781 Outermost thermoplastic resin layer 782 Paper base layer 783 Innermost thermoplastic resin layer 784 Middle adhesive layer 785 Barrier Layer 79 Contents 80 Conventional paper container with zipper 81 Blank Board 81a Back blank plate 81b Blank plate on the front side 812 First vertical fold line 821 Intermediate horizontal fold line (half fold line) 831 Wall Panel 833 Top plate 834 Upper overlapping plate 835 Bottom plate 836 Side edge seal allowance 837 Bottom seal fee 851 Easy-open processed wire 856 Swing-out opening 861 Zipper Tape 861a Back zipper tape 861b Outer zipper tape 861m Male zipper tape 861f Female zipper tape 862 Zipper tape body 862a Back zipper tape body 862b Outer zipper tape body 862m Male zipper tape body 862f Female zipper tape body 863 Zipper tape fitting 863a Back zipper tape fitting 863b Front zipper tape fitting 863m Male zipper tape fitting 863f Female zipper tape fitting 871 Top of zippered paper container 872 Body of zippered paper container 873 Bottom of zippered paper container 874 Top protruding part (ear) 88 Laminated sheets for paper containers 881 Outermost thermoplastic resin layer 882 Paper base layer 883 Innermost thermoplastic resin layer 884 Middle adhesive layer 885 Barrier Layer 89 Contents 90 A paper container with a zipper according to one embodiment of the present disclosure 91 An intermediate stage of a zippered paper container according to an embodiment of the present disclosure (flat state) 92 An intermediate stage of a zippered paper container according to one embodiment of the present disclosure (in a raised state) 93 Blank plate of one embodiment of the present disclosure E First top intersection (intersection of the first vertical fold line and the first horizontal fold line) F Second top intersection (intersection of the second vertical fold line and the second horizontal fold line) G First bottom intersection (intersection of the first vertical fold line and the fourth horizontal fold line) H Second bottom intersection (intersection of the second vertical fold line and the third horizontal fold line) L The reference point of the lower end of the opening sharp line (the second horizontal fold line and (Intersection with the opening sharp line or its downward extension)

Claims

1. A paper container with a zipper is assembled by joining a front blank plate and a back blank plate made of a laminated sheet having a paper base material, A top part including an upper overlapping plate formed by overlapping and joining the front blank plate and the back blank plate to the top of the zipper-equipped paper container, and a top plate connected to the lower side of the upper overlapping plate; A top side plate connected to both left and right ends of the upper overlapping plate; A top portion protruding portion provided on both the left and right sides of the top portion; A body portion provided below the top portion; A bottom portion provided on the lower side of the body portion; An upper seal portion that crosses the upper edge portions or the vicinity of the upper edge portions of the upper overlapping plate and the side plate of the top portion; a zipper tape located below the upper seal portion and extending across the upper overlapping plate and the side plate of the top portion; A male zipper tape constituting the zipper tape is provided on either the front blank plate or the back blank plate, A female zipper tape constituting the zipper tape is provided on the other of the front blank plate or the back blank plate, The chuck paper container is provided with a specific marking indicating a direction in which the chuck paper container is tilted when the contents of the chuck paper container are poured out, A paper container with a zipper, characterized in that the blank plate on which the male zipper tape is provided has an opening sharp line.

2. The paper container with a zipper according to claim 1, characterized in that the specific indication indicates that the male zipper tape will be on the bottom side when the paper container with a zipper is tilted to scoop out the contents.

3. The paper container with a zipper according to claim 1 or 2, characterized in that the specific indication indicates that the female zipper tape will be on the upper side when the paper container with a zipper is tilted to scoop out the contents.

4. A paper container with a zipper as described in any one of claims 1 to 3, characterized in that at least one of the upper overlapping plate and / or the top plate, which are part of the blank plate, is provided with an opening sharp line extending vertically in the longitudinal direction of the paper container with a zipper.

5. 5. The paper container with a zipper according to claim 1, wherein the blank plate on which the male zipper tape is provided is provided with an opening assist line.

6. The paper container with a zipper as described in claim 5, characterized in that an opening assistance line is provided at least on the upper overlapping plate, and / or the side plate of the top part, and / or the top panel, and / or the top side protrusions (ears) connected to the left and right sides of the top panel.

Images