Paper container provided with zipper

Abstract

To provide a three-dimensionally shaped paper container provided with a zipper for taking a content out via shaking-out, exhibiting a self-standing property, and comprising a chuck at a top portion, capable of easily adjusting an adjustment degree of a shaking-out amount of a content since a shaking-out opening thereof can be set to a desired opening degree.MEANS FOR SOLVING THE PROBLEM: An upper portion seal part, an easily opening processing line, and a zipper tape are provided on a top part of a paper container provided with a zipper in order from an upper edge part side to provide an opening restriction part by partially leaving the upper portion seal part, when cutting the easily opening processing line. An opening of the zipper tape is restricted by the opening restriction part to set a shake-out opening to a desired size.SELECTED DRAWING: Figure 11

Description

[Technical field]

[0001] The present invention relates to a paper container with a zipper, and particularly to a paper container with a zipper in the field of paper containers that have a three-dimensional shape and are self-supporting, in which the opening of the shaking opening can be adjusted and the amount of the contents that can be shaken out can be easily adjusted. [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. 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, Figure 3 shows a plan view, and Figure 4 shows a perspective view with the top part open.

[0003] 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 invention. Furthermore, reference numbers used in describing the prior art are in the 80s or 800s to distinguish them from the present invention. 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.

[0004] In the case of the zippered paper container 80 described in Patent Document 1, when the top is opened and the contents are shaken out, 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 shake-out opening 856. Then, the zippered paper container 80 is lifted and tilted to shake out the contents.

[0005] However, as will be described later, the shaking opening 856 does not have an opening limiting portion that limits the opening of the top portion 871, and opens over almost the entire transverse direction of the zippered paper container 80 as shown in Figure 4, so there is a risk that when a small amount is requested, a larger amount than desired will be unintentionally shaken out. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2005-178833 A Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention has been made to solve the above problems, and its object is to provide a paper container 90 with a zipper in which the opening size of the shaking opening 56 for shaking out the contents is limited to an appropriate size, making it easy to adjust the amount of shaking out. [Means for solving the problem]

[0008] The above problems can be solved by the following embodiments of the present invention. That is, the retractable paper container 90 of the present invention has the following features: In a paper container 90 with a zipper, which is assembled by joining two blank plates 93 made of a laminated sheet 78 based on paper, A top portion 71 including an upper overlapping plate 34 that is overlapped and joined to the upper portion of the zipper-equipped paper container 90 and a top plate 33 that is connected to the lower side of the upper overlapping plate 34; A first top side plate 411 is provided on one end of the upper overlapping plate 34, and A side plate 412 of the second top portion connected to the other end 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, the first top side plate 411, and the second side plate 412; a zipper tape 61 located below the upper seal portion 53 and extending across the upper overlapping plate 34, the side plate 411 of the first top portion, and the side plate 412 of the second top portion; An opening limiting portion 54 is provided by partially leaving the upper seal portion 53, The opening limiting portion 54 extends from a first side edge portion 11, which is one side edge portion of the blank plate 93, or a vicinity of the first side edge portion 11, toward a second side edge portion 16, which is the other side edge portion, and does not reach the second side edge 16, The opening limiting portion 54 is formed by cutting the easy-to-open processing line 51, At least a portion of the easy-open processing line 51 extends between the upper seal portion 53 and the zipper tape 61, At least a portion of the easy-open processing line 51 crosses the upper seal portion 53 .

[0009] According to the embodiment of the present invention described above, in the resealable paper container 90, the opening limiting portion 54, which is formed by partially leaving the upper seal portion 53, limits the opening of the shaking opening 56 to an appropriate size, making it easier to adjust the amount of contents shaken out.

[0010] In addition, the side plate 411 of the first top portion and the side plate 412 of the second top portion may be collectively referred to as the side plate 41 of the top portion.

[0011] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, The easy-open processing line 51 is A first easy-to-open processing line 511 extending in the transverse direction of the chuck paper container 90, located on the shaking opening 56 side of the chuck paper container 90, and extending between the upper seal portion 53 and the chuck tape 61; A third easy-to-open processing line 513 extending in the transverse direction of the chuck-equipped paper container 90, located on the opening limiting portion 54 side of the chuck-equipped paper container 90, and extending between the upper seal portion 53 and the chuck tape 61; It may also comprise a second easy-to-open process line 512 extending from one end L1 of the first easy-to-open process line 551, across the upper seal portion 53, and to the upper edge 21 of the resealable paper container 90.

[0012] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, The easy-open processing line 51 is An end portion L1 of the first easy-open processing line 511 on one side of the first side edge portion 11 and an end portion of the third easy-open processing line 513 on one side of the second side edge portion 16 are connected to each other at a connection portion L1, and a second easy-open process line 512 extending from the end L1 across the upper seal portion 53 to the upper edge portion 21 of the resealable paper container 90.

[0013] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, The second easy-open processing line 512 is smoothly connected to the first easy-open processing line 511 with a curve that convex downward at the end point L1, and the first side edge 11 side of the first easy-open processing line 511 may be curved toward the upper edge 21 side, cross the upper seal portion 53, and reach the upper edge 21.

[0014] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, The second easy-to-open processing line 512 may be inclined so as to move away from the first easy-to-open processing line 511 and toward the first side edge 11 as it moves from the first easy-to-open processing line 511 toward the upper edge 21.

[0015] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, A notch 77 may be provided at least at one location of at least one end of the first easy-to-open processing line 511 toward the second side edge 16, at least one end of the second easy-to-open processing line 512 toward the upper edge 21, and at least one end of the third easy-to-open processing line 513 toward the first side edge 11.

[0016] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, The transverse range of the retractable paper container 90 in which the opening limiting portion 54 is formed is One side edge of the blank plate 93 is a first side edge 11, and from the first side edge 11 or the vicinity of the first side edge 11, It may be up to approximately the center of the upper overlapping plate 34 in the width direction.

[0017] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, The transverse range of the chuck-equipped paper container 90 in which the opening limiting portion 54 is formed is One side edge of the blank plate 93 is a first side edge 11, and from the first side edge 11 or the vicinity of the first side edge 11, Of the vertical fold lines that form the ridge 72d of the body 72 of the zippered paper container 90, the vertical fold line closer to the first side edge 11 is designated as the second vertical fold line 13, and it may extend up to the second vertical fold line 13 or near the second vertical fold line 13.

[0018] The transverse range of the retractable paper container 90 in which the opening limiting portion 54 is formed is One side edge of the blank plate 93 is a first side edge 11, and from the first side edge 11 or the vicinity of the first side edge 11, The other side edge of the blank plate 93 is the second side edge 16, and of the vertical fold lines forming the ridge 72d of the body 72 of the zippered paper container 90, the vertical fold line closer to the second side edge 16 is the third vertical fold line 14, and it may extend up to the third vertical fold line 14 or near the third vertical fold line 14.

[0019] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, The transverse range of the chuck-equipped paper container 90 in which the opening limiting portion 54 is formed is One side edge of the blank plate 93 is a first side edge 11, and from the first side edge 11 or the vicinity of the first side edge 11, The other side edge of the blank plate 93 may be the second side edge 16, the vertical fold line that forms the ridge 72d of the body 72 of the zippered paper container 90, which is closer to the second side edge 16, may be the third vertical fold line 14, the vertical fold line that exists on the opposite side of the second side edge 16 of the side seal margin 372 adjacent to the second side edge 16, may be the fourth vertical fold line 15, and the distance between the fourth vertical fold line 15 and the third vertical fold line 14 may be distance X, and the width of the fold line may extend from the third vertical fold line 14 to a position that is distance X away in the direction of the first side edge 11.

[0020] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, An opening assistance line 55 may be provided on at least one of the top panels 33 on the front and back of the paper container 90 with a zipper.

[0021] In addition, in the paper container 90 with a zipper according to one embodiment of the present invention, The opening auxiliary line 55 is defined as an intersection point between a virtual line extending vertically from a position on the second side edge 16 side of the opening limiting portion 54 toward the lower edge 26 and a first horizontal folding line 22 located on the lower side of the upper overlapping plate 34, the side plate 411 of the first top portion, and the side plate 412 of the second top portion, and the intersection point is defined as an inner reference point L4 of the opening auxiliary line 55, and the intersection point is defined as an intersection point between the reference point L4 or the vicinity of the reference point L4, It may be located on a line connecting the second top intersection point F, which is the intersection point of the third vertical fold line 14 and the second horizontal fold line 23, or in the vicinity of the second top intersection point F. Effect of the Invention

[0022] According to the embodiment of the present invention described above, the opening of the shaking opening 56 of the resealable paper container 90 is limited to an appropriate size, thereby making it possible to provide a resealable paper container 90 that makes it easy to adjust the amount of content that is shaken out. [Brief description of the drawings]

[0023] [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] FIG. 1 is a plan view of a resealable paper container 80 of the prior art. [Figure 4] FIG. 1 is a perspective view of a conventional paper container 80 with a zipper with the top open. [Diagram 5] FIG. 2 is a development view of a blank plate 93 used in manufacturing a retractable paper container 90 according to the first embodiment (second embodiment, third embodiment) of the present invention. [Figure 6] FIG. 6 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. 5. [Figure 7] 6 is a perspective view showing the shape of a paper container (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. 5. FIG. [Figure 8] 6 is a perspective view of a paper container 90 with a zipper produced using the blank plate 93 shown in FIG. 5. FIG. [Figure 9] FIG. 9 is a side view of the zippered paper container 90 shown in FIG. 8. [Figure 10] FIG. 9 is a plan view of the zippered paper container 90 shown in FIG. 8. [Figure 11] 9 is a perspective view of the zippered paper container 90 shown in FIG. 8 with the top portion 71 open. [Figure 12] 11(a) is a diagram showing the upper end portion of FIG. 4; and FIG. 11(b) is a diagram showing the upper end portion of FIG. [Figure 13] FIG. 13 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zipper according to a second aspect of the third embodiment of the present invention. [Figure 14] FIG. 11 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zipper according to a fourth embodiment of the present invention. [Figure 15] FIG. 13 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zipper according to an eighth embodiment of the present invention. [Figure 16] FIG. 13 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zip fastener according to a ninth embodiment of the present invention. [Figure 17] FIG. 11 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zipper according to a tenth embodiment of the present invention. [Figure 18] FIG. 2 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zipper of the first aspect of the eleventh embodiment (first aspect of the twelfth embodiment) of the present invention. [Figure 19] FIG. 23 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zipper according to a second aspect of a twelfth embodiment of the present invention. [Figure 20]FIG. 23 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zipper according to a third aspect of a twelfth embodiment of the present invention. [Figure 21] FIG. 23 is a front view showing the shape of a paper container (in a flat state) 91 at an intermediate stage when producing a paper container 90 with a zipper according to a fourth aspect of a twelfth embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The present invention will be described below with reference to the drawings, but the present invention is not limited to the specifically shown 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.

[0025] First Embodiment (Blank board) A blank plate 93 of a resealable paper container 90 according to the first embodiment of the present invention is shown in Fig. 5. Fig. 5(a) shows the back blank plate 10a, and Fig. 5(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.

[0026] Unless otherwise specified, in each component of the blank plate 93 described below, the subscript a of each symbol indicates an element of the blank plate 10a on the back side, and the subscript b indicates an element of the blank plate 10b on the front side. For elements with both the subscripts a and b, the symbol without a subscript includes both a and b.

[0027] The rear upper edge portion 21a, which is the lower side of the rear blank plate 10a in the drawing of FIG. 5(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. 5(b), becomes the upper side of the paper container 90 with a zipper.

[0028] In both Figures 5(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 5(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.

[0029] The back blank plate 10a and the front blank plate 10b described above are aligned and stacked and joined to produce an intermediate stage paper container with a zipper (flat state) 91 as shown in Figure 6, and the process proceeds to complete a paper container with a zipper 90; this manufacturing method will be described later.

[0030] Unless otherwise specified, the top, bottom, left and right of the front blank plate 10b will be shown with reference to Figure 5(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 5(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.

[0031] 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. 8). 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.

[0032] 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. 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.

[0033] The front blank plate 10b of the zippered paper container 90 of the present invention is formed into a roughly rectangular outer shape using a laminated sheet 78 (not shown) having a base paper laminated as at least the middle layer and a thermal adhesive resin such as polyethylene laminated as at least the innermost layer, with the upper side being the upper edge 21b, the left side being the first side edge 11b, the right side being the second side edge 16b, and the lower side being the lower edge 26b. The laminated sheet 78 will be described later.

[0034] 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 third vertical folding line 14b, and a front fourth vertical folding line 15b. It is preferable that the front side vertical folding lines 12b, 13b, 14b, 15b are approximately parallel to the front side first side edge portion 11b and the front side second side edge portion 16b, respectively.

[0035] The front blank plate 10b is provided with, in the transverse direction from the upper edge 21b, a first horizontal folding line 22b, a second horizontal folding line 23b, a third horizontal folding line 24b, and a 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.

[0036] Furthermore, there are provided a diagonal fold line 171b at the first top portion of the front side, a diagonal fold line 172b at the second top portion of the front side, a diagonal fold line 181b at the first bottom portion of the front side, and a diagonal fold line 182b at the second bottom portion of the front side, and the forming plates of each part required for forming the zippered paper container 90 are configured in a divided manner.

[0037] In addition, the first top diagonal fold line 171b on the right side of the front blank plate 10b and the second top diagonal fold line 172b on the left side of the front blank plate 10b may be collectively referred to as the front top diagonal fold line 17b.

[0038] The upper end of the first top diagonal fold line 171b on the front side is at the same position as the first top intersection point E1b on the front side, which is the intersection point of the first vertical fold line 12b on the front side and the first horizontal fold line 22b on the front side. The lower end of the first top diagonal folding line 171b on the front side is at the same position as the second top intersection point F1b on the front side, which is the intersection point of the second vertical folding line 13b and the second horizontal folding line 23b on the front side.

[0039] The upper end of the second top diagonal fold line 172b on the front side is at the same position as the first top intersection point E2b on the front side, which is the intersection point of the fourth vertical fold line 15b on the front side and the first horizontal fold line 22b on the front side. The lower end of the second top diagonal fold line 172b on the front side is at the same position as the second top intersection point F2b on the front side, which is the intersection point of the third vertical fold line 14b on the front side and the second horizontal fold line 23b on the front side.

[0040] In addition, the first bottom diagonal fold line 181b on the right side of the front blank plate 93 and the second bottom diagonal fold line 182b on the left side of the front blank plate 93 may be collectively referred to as the front bottom diagonal fold line 18b.

[0041] The upper end of the front first bottom diagonal fold line 181b is at the same position as the front second bottom intersection point H1b, 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 first bottom diagonal fold line 181b on the front side is at the same position as the first two bottom intersection point G1b on the front side, which is the intersection point of the first vertical fold line 12b on the front side and the fourth horizontal fold line 25b on the front side.

[0042] The upper end of the second bottom diagonal fold line 182b on the front side is at the same position as the second bottom intersection point H2b on the front side, which is the intersection point of the third vertical fold line 14b on the front side and the third horizontal fold line 24b on the front side. The lower end of the second bottom diagonal fold line 182b on the front side is at the same position as the first bottom intersection point G2b on the front side, which is the intersection point of the fourth vertical fold line 15b and the fourth horizontal fold line 25b on the front side.

[0043] The above-mentioned oblique bending lines 171b, 172b, 181b, 182b may be located near the above-mentioned intersections E1b, E2b, F1b, F2b, G1b, G2b, H1b, H2b without contacting them. By being located near the intersections, it is possible to prevent a decrease in the strength of the laminated sheet 78 of the front blank plate 10b while maintaining sufficient bending performance and preventing excessive concentration of bending lines at specific locations.

[0044] A front side first side edge seal margin 371b is formed at the left first side edge 11b of the front side blank plate 10b via the front side first vertical fold line 12b, and a front side second side edge seal margin 372b is formed at the right second side edge 16b via the front side fourth vertical fold line 15b.

[0045] A front bottom seal margin 38b is formed at a front lower edge 26b located below the front blank plate 10b via a front fourth horizontal folding line 25b.

[0046] 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.

[0047] 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.

[0048] Further, a side plate 411b of the first top portion of the front side is connected to the left outer side of the front side upper overlapping plate 34b via the front side second vertical folding line 13b. A side plate 412b of the second top portion of the front side is connected to the right outer side of the front side upper overlapping plate 34b via the front side third vertical folding line 14b.

[0049] Additionally, a front first top protruding portion (ear portion) margin 391b is connected to the left outer side of the front top panel 33b via the front second vertical folding line 13b. A front second top protruding portion (ear portion) space 392b is connected to the right outer side of the front top panel 33b via the front third vertical bending line 14b.

[0050] Further, a front first side panel 321b is connected to the left outer side of the front wall panel 31b via a front second vertical bending line 13b. A front second side panel 322b is connected to the right outer side of the front wall panel 31b via a front third vertical bending line 14b.

[0051] Further, a front first bottom protruding portion (ear portion) margin 431b is connected to the left outer side of the front bottom panel 35b via the front second vertical bending line 13b. A front second bottom projection (ear) margin 432b is connected to the right outer side of the front bottom panel 35b via the front third vertical bending line 14b.

[0052] Further, a first top protruding portion (ear) margin 391b is connected to the lower side of the first top side panel 411b via a first horizontal bending line 22b. A first side panel 321b is connected to the lower side of the first top protruding portion (ear) margin 391b via a second horizontal bending line 23b. A first bottom protruding portion (ear) margin 431b is connected to the lower side of the first side panel 321b via a third horizontal bending line 24b.

[0053] Further, a second top protrusion (ear) margin 392b is connected to the lower side of the side plate 412b of the second top portion of the front side via a first horizontal bending line 22b. A second side panel 322b is connected to the lower side of the second top protrusion (ear) margin 392b of the front side via a second horizontal bending line 23b. A second bottom protrusion (ear) margin 432b is connected to the lower side of the second side panel 322b of the front side via a third horizontal bending line 24b.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] The front upper overlapping plate 34b and the side plate 41b of the top part of the front side are provided with a front easy-open processing line 51b as an opening means. By providing the easy-open processing line 51b, the zippered paper container 90 can be opened without using tools such as scissors.

[0060] When the inner faces of the back blank plate 10a and the front blank plate 10b are aligned and overlapped, the front upper overlapping plate 34b and the side plate 41b of the front top are provided with a front upper seal portion 53b as a transverse sealing means and a front zipper tape joint portion 52b (shown in Figure 6) as described later, in sequence from the front upper edge portion 21b, at a predetermined position where the two blank plates overlap each other.

[0061] At least a portion of the front side easy-open processing line 51b exists between the front side upper seal portion 53b and the front side zipper tape joint portion 52b. At least a part of the front side easy-open processing line 51b existing between the front side upper seal portion 53b and the front side zipper tape joint portion 52b is opened, thereby partially exposing the zipper tape 61. By opening the exposed zipper tape 61, the contents can be shaken out.

[0062] In Fig. 5, easy-open processing line 51b is made up of first easy-open processing line 511b, second easy-open processing line 512b, and third easy-open processing line 513b. The role of each easy-open processing line will be explained later.

[0063] The easy-open processing line 51b may not be provided depending on the material, layer structure, and easy-open processing conditions of the laminated sheet 78 of the front blank plate 10b. Even without the easy-open processing line 51b, it may be possible to open the package by hand.

[0064] Furthermore, the easy-open processing line 51b may be opened with a blade such as scissors. In that case, the intended opening line may be displayed by printing. Also, it may be printed at the position of the easy-open processing line 51b shown in Fig. 5. Also, the intended opening line may not be clearly indicated on the chuck-equipped paper container 90, but may be written in an attached instruction manual or the like.

[0065] Fig. 6 is a front view showing the shape of a chuckable paper container (flat state) 91 at an intermediate stage when manufacturing a chuckable paper container 90 using the blank plate 93 shown in Fig. 5. The uppermost part is the upper edge 21b of the front blank plate 10b shown in Fig. 5(b), and on its rear side is provided the rear blank plate 10a. The rear blank plate 10a cannot be seen with the naked eye, but when viewed through, it has the same shape as the front blank plate 10b.

[0066] In Figure 6, the back blank plate 10a and the front blank plate 10b are overlapped, and since each component has the same positional relationship when viewed through the drawing within the range of manufacturing variations, the notation and suffixes for the front side may be omitted in the explanation.

[0067] 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, as described below.

[0068] The upper seal portion 53 is provided at or near the upper edge portion 21 of the upper overlapping plate 34 and the side plate 41 of the top surface. 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.

[0069] 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.

[0070] 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.

[0071] (Easy-to-open processing line) The easy-open processing line 51 will now be described. In FIG. 6 , easy-open processing line 51 is composed of a first easy-open processing line 511 , a second easy-open processing line 512 , and a third easy-open processing line 513 . However, in this embodiment, the easy-open processing line does not necessarily have to have the above-mentioned configuration, and it is sufficient if an opening limiting portion 54 described below is appropriately provided, and one embodiment is shown here as an example.

[0072] In the present invention, when shaking out a small amount of the contents filled in the chuck paper container 90, the opening degree of the shaking opening 56 on the top part 71 of the chuck paper container 90 can be adjusted, making it easy to adjust the amount of the contents to be shaken out. For this purpose, an opening limiting part 54 is provided to adjust the opening degree. The opening limiting portion 54 is formed by partially removing the upper seal portion 53 and leaving a portion thereof.

[0073] The upper part of the top portion 71 of the zippered paper container 90 is composed of an opening limiting portion 54 and a shaking opening 56 in the horizontal direction, and the opening limiting portion 54 is provided in the direction from the first side edge portion 11 to the second side edge portion 16 (inward direction). Also, a swing-out opening 56 is provided in the direction from the second side edge 16 to the first side edge 11 (inward direction).

[0074] The laminated sheet 78 of the zippered paper container 90 is cut away by a first easy-open finish line 511 extending from the second side edge 16 in the transverse direction toward the first side edge 11, and a second easy-open finish line 512 connecting to an end L1 of the first easy-open finish line on the first side edge side and reaching the upper edge 21. The opening 56 for shaking out is formed by partially exposing the zipper tape 61.

[0075] In addition, the first easy-open processing line 511 and the third easy-open processing line 513 are connected at the end L1 of the first side edge portion 11 of the first easy-open processing line 511, and the second easy-open processing line 512 branches off from the end L1 of the first side edge portion 11 of the first easy-open processing line 511, which is their connection point.

[0076] A first easy-to-open processing line 511 exists between the upper seal portion 53 and the zipper tape joint portion 52, and by cutting the first easy-to-open processing line 511, the upper seal portion 53 is separated from the upper overlap plate 34 on the upper side of the zipper tape 61 and the side plate 412 of the second top portion, thereby partially exposing the zipper tape 61.

[0077] Furthermore, by cutting the second easy-open processing line 512, the upper seal portion 53 is cut to reach the upper edge portion 21, and a piece of the laminated sheet 78 of the zippered paper container 90 that forms the shaking opening 56 is cut out.

[0078] When the cutting of the first easy-opening processed line 511 by hand reaches the end L1 of the first side edge portion 11 of the first easy-opening processed line 511, the direction of the force applied to the cutting is changed so that the cutting of the second easy-opening processed line 512 can be started. At this time, care must be taken not to cut the third easy-opening processed line 513 by mistake.

[0079] The upper seal portion 53 is cut and removed by a first easy-open processing line 511 and a second easy-open processing line 512, which are part of the easy-open processing line 51 located between the upper seal portion 53 and the zipper tape joint portion 52, and the remaining portion becomes the opening limiting portion 54.

[0080] When the contents are to be shaken out, the zipper tape 61 is opened, but since the size of the opening is regulated by the opening limiting part 54, the shaking opening 56 opens to an appropriate degree, and the contents can be shaken out in an appropriate amount.

[0081] Furthermore, when shaking out the contents, the shaking opening 56 is tilted downward, but by grasping the upper overlapping plate 34 on the opening limiting portion 54 side and / or the side plate 411 of the first top portion, it becomes easier to tilt the zippered paper container.

[0082] When the remaining amount of the contents is low, the opening 56 for shaking out may be opened to the full width in order to make it easier to take out the contents. To this end, the first side edge 11 may be cut so that at least one of the first easy-opening finish line 511 or the second easy-opening finish line 512 is cut until the third easy-opening finish line 513 is reached, thereby opening the opening 56 for shaking out to almost the full width. In addition, third easy-to-open processing line 513 may be cut from the first easy-to-open processing line 511.

[0083] As described above, when a small amount is to be dispensed, the opening degree of the dispensing opening 56 can be made small, and when the remaining amount is small, the opening degree of the dispensing opening 56 can be made large so that the contents can be taken out, so that the dispensing opening 56 with the opening degree according to need can be obtained.

[0084] 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.

[0085] 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.

[0086] Also, although not shown in the figure, there may be only the first easy-to-open processing line 511, and the first easy-to-open processing line 511 may extend from the second side edge 16 across the upper seal portion 53 to the upper edge portion 21.

[0087] (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.

[0088] 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.

[0089] The rear blank sheet 10a and the front blank sheet 10b are overlapped, and the side edge seal portions 371, 372 and the upper seal portions 53 are heat sealed together. At this time, the zipper tape 61, which has already been fitted at the mating portion between the male tape body and the female tape body, is inserted into this portion, and at the same time, the zipper tape joint portion 52 is heated and pressurized from the outer surfaces of the two blank plates 93 to heat seal them.

[0090] The fastening of the zipper tape 61 is not limited to the above-mentioned heat sealing, and may be achieved by other methods such as adhesive or adhesive tape.

[0091] By heat-sealing the zipper tape 61 in this manner, there is less misalignment in the heat seal compared to a method in which a male tape body and a female tape body 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.

[0092] (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 laminated as an intermediate layer, and a thermo-adhesive resin such as polyethylene laminated as the innermost and / or outermost layer. If necessary, the intermediate layer may be provided with a barrier layer against water vapor, oxygen or other gases, or a strength-enhancing layer.

[0093] Furthermore, when providing a printed layer such as a pattern on the zippered paper container 90 of this embodiment, it is usually printed on the surface of the paper base layer. However, if the paper base layer does not have good printability, a printed layer such as a pattern can be provided on, for example, a biaxially oriented polyethylene terephthalate film, and the film can be laminated between the outermost thermal adhesive resin layer and the paper base layer.

[0094] The paper base layer 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 (sizing 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 90 to 320 g / m 2 The range is appropriate.

[0095] Examples of resins that can be used for the innermost and / or outermost thermal adhesive resin layer (sealant layer) 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.

[0096] 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.

[0097] The innermost and / or outermost heat-adhesive resin layers as described above can 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, or by forming the heat-adhesive resin into a film in advance and laminating the film by bonding it together using a known dry laminate or extrusion laminate (sandwich laminate) method.

[0098] When a gas barrier layer is laminated on the intermediate layer of the laminated sheet 78, the gas barrier layer may be a metal foil such as aluminum foil, or a vapor-deposited film in which a metal or inorganic oxide such as aluminum, silica, or alumina is vapor-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). 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 may be used.

[0099] Such a gas barrier layer is usually preferably laminated on the inner surface of the intermediate paper base layer, since the gas barrier property can be effectively utilized, but when a metal foil such as aluminum or a metal-deposited film is used for the gas barrier layer, the metallic feel can also be utilized in the design, so that the gas barrier layer can be laminated on the outer surface of the paper base layer. The gas barrier layer can be easily laminated by known dry lamination or extrusion lamination (sandwich lamination), etc.

[0100] Below is an overview of the steps taken to create an intermediate stage zip-lock paper container (flat state) 91 from a blank plate 93 for a zip-lock paper container 90, and to complete a package of the zip-lock paper container 90 filled with contents.

[0101] (Creating a paper container with a zipper (flat state) at the intermediate stage) When the two blank plates 10a, 10b are overlapped, a zipper tape 61 having a male tape body and a female tape body previously 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.

[0102] Next, the inner faces of the upper seal portion 53 are heat sealed together, and the inner faces of the first side edge seal portion 371 adjacent to the first side edge portion 11, and the inner faces of the second side edge seal portion 372 adjacent to the second side edge portion 16 are heat sealed together. The lower edge 26 is formed into an open bag shape. Also, a notch 77 may be provided at each end (the portion contacting the upper edge and the side edges on both sides) of the easy-open processing line 51. The notch 77 may be provided at any one end.

[0103] A description will now be given of a case where a crushed portion for facilitating folding is provided at the folded portion of the zipper tape 61. Although not shown in the figure, the zipper tape 61 heat-sealed to the zipper tape joint portion 52 is pressed by a heat press or the like from the outer surface of the laminated sheet 78 of the zippered paper container 90 to crush the zipper tape 61 to a size of about 2 mm at positions perpendicular to the second vertical folding line 13 and the third vertical folding line 14, thereby deforming the zipper tape 61 to be thinner, thereby providing the above-mentioned crushed portions.

[0104] 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. 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, folding lines can be processed, zipper tape 61 can be inserted and heat-sealed, side edge seal portions 371 and 372 can be heat-sealed, the upper seal portion 53 can be heat-sealed, and notches 77 can be punched out.

[0105] 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.

[0106] Next, an intermediate stage paper container with a zipper (flat state) 91 in the shape shown in Figure 6 is produced by cutting 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.

[0107] After the intermediate stage zippered paper container (standing state) 92 has been produced, as shown in Figure 8, the upper overlapping plate 34 and the top side plates 41 are folded toward the rear, and the protruding portions (ears) 74 on both top sides are joined to the body 72 of the zippered paper container 90, and the open bottom 73 of the zippered paper container 90 is placed up and the contents are filled into the bottom 73.

[0108] Next, the bottom seal tabs 38 are heat sealed together, and the back is folded over. Thereafter, the bottom projections (ears) 75 projecting on both sides of the bottom 73 of the resealable paper container 90 are folded onto the bottom plate 35 and heat sealed, completing the packaging of the resealable paper container 90.

[0109] Fig. 8 is a perspective view showing a first embodiment of a retractable paper container 90 of the present invention. Fig. 9 is a side view of the retractable paper container 90 shown in Fig. 8. Fig. 10 is a plan view of the retractable paper container 90 shown in Fig. 8.

[0110] The zippered paper container 90 shown in FIG. 8 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.

[0111] Such a paper container 90 with a zipper can be produced by the following procedure. For example, using a blank plate 93 having the configuration shown in FIG. 5, the inner surfaces of two blank plates 10a, 10b are aligned and then overlapped as shown in FIG. 6, and a zipper tape 61 having a male tape body and a female tape body previously fitted together is inserted at the position where the zipper tape joints 52 overlap, and the zipper tape joints 52 are heat-sealed from the outside of the blank plate 93 by applying heat and pressure.

[0112] Next, the seal portions 371 on the first side edge 11 and the seal portions 372 on the second side edge 16 are heat sealed, and the upper seal portions 53 are heat sealed. A notch 77 is provided at the end of the first easy-open finish line 511 on the second side edge 16, and a zippered paper container (flat state) 91 in an intermediate stage is produced in a folded shape with the bottom seal portion 38 open and unsealed.

[0113] (Production of intermediate stage paper container with zipper (standing box state)) Next, 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.

[0114] 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.

[0115] 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. 7, the upper overlapping plate 34 stands upward.

[0116] 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.

[0117] (Forming and filling 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.

[0118] 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.

[0119] 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.

[0120] 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 38 are heat sealed together in a palm-to-palm seal format.

[0121] Then, the bottom side sealing portion 38 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.

[0122] (Opening for shaking out paper containers with zippers) FIG. 11 shows the top portion 71 of the packaging bag of the completed zippered paper container 90 containing the contents opened for shaking out.

[0123] The first easy-open finish line 511 is cut manually from a notch 77 (see Figs. 7 to 10) provided on the second side edge 16 side thereof, and is cut until it reaches the end L1 of the first side edge 11 side of the first easy-open finish line 511. Thereafter, the cutting direction changes to the upper edge 21 side, and cutting proceeds at the second easy-open finish line 512. Then, the cutting proceeds to the upper edge 21, and the cutting is completed, and the cut pieces of the upper overlapping plate 34 and the side plate 412 of the second top part are cut off (see Fig. 11).

[0124] Next, the front side opening grip area 57b between the front side first easy-open processing line 511b and the zipper tape 61, and the back side opening grip area 57a between the back side first easy-open processing line 511a and the zipper tape 61 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 first easy-open processing line 511.

[0125] During this opening operation of the zipper tape 61, the end of the second side edge 16 of the zipper tape 61 opens up to the seal margin 372 on the second side edge, and the end of the swing-out opening 56 on the opposite side of the first side edge 11 of the zipper tape 61 is prevented from being opened by the opening limiting portion 54. The opening limiting portion 54 is the portion that remains after the upper seal portion 53 is cut at the first easy-open finish line 511 and the second easy-open finish line 512.

[0126] When the top portion 871 of a conventional zippered paper container 80 that does not have an opening limiting portion is opened, since there is no opening limiting portion, the zipper tape 61 opens over almost the entire width from the seal margin 836 on one side edge to the seal margin 836 on the other side edge, as shown in Figure 4.

[0127] 12(a) shows the top edge of an open conventional paper container 80 with a zipper as viewed from above. The opening 856 for shaking out the contents is wide and opens across almost the entire width of the paper container 80 with a zipper, making it difficult to control when shaking out a small amount of contents and risking unintentional shaking out of a large amount.

[0128] 12(b) shows the top edge of the opened resealable paper container 90 of the present invention when viewed from above. The opening 56 for shaking the contents through when shaking out is the area of ​​the entire width of the resealable paper container 90 excluding the opening limiting part 54, which makes it easy to control when shaking out a small amount of contents and allows the desired volume to be shaken out.

[0129] In addition, the method of creating the blank plate 93 has been mainly explained in relation to the front blank plate 10b, but as the shape of the back blank plate 10a is the same, it is symmetrical about the upper edge portions 21a, 21b, and the manufacturing method is the same, the explanation of the back blank plate 10a will be omitted.

[0130] In addition, in the description of this embodiment, an example has been described in which the opening limiting portion 54 is on the left side and the opening for swinging out 56 is on the right side. However, without being limited to this example, the left and right may be reversed. The opening limiting portion 54 may be on the right side and the opening for swinging out 56 may be on the left side. The same applies to each embodiment described below.

[0131] Second Embodiment The easy-open processing line 51 is composed of at least a first easy-open processing line 511, a second easy-open processing line 512, and a third easy-open processing line 513. Fig. 5 is also used to explain the first embodiment, and shows a blank plate 93 of the second embodiment. Fig. 6 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 using the blank plate 93 shown in Fig. 5.

[0132] This will be explained using Figure 6. A first easy-open processing line 511 extends in the transverse direction of the blank plate 93 and is located on the side of the swing-out opening 56 between the upper seal portion 53 and the zipper tape 61 .

[0133] The right end of the first easy-open processing line 511 abuts the second side edge 16, and a notch 77 may be provided at that location. By providing the notch 77, initial opening is made easier.

[0134] The end L1 of the first easy-to-open processing line 511 on the first side edge portion 11 side is also the branching point where the second easy-to-open processing line 512 branches off, and may be located between the second vertical fold line 13 and the third vertical fold line 14. Since the end L1 of the first side edge portion 11 of the first easy-open processing line 511 is located at this position, the shaking opening 56 can be opened to the desired appropriate degree, making it easy to control the amount of the contents that is shaken out.

[0135] If the end L1 of the first side edge 11 of the first easy-open processing line 511 is located closer to the first side edge 11 than the second vertical fold line 13, the shaking opening 56 will be larger and will not be significantly different from an opening spanning the entire width of the zippered paper container 90, making it impossible to control the amount of contents that can be shaken out. If the end L1 of the first side edge 11 of the first easy-open processing line 511 is located closer to the second side edge 16 than the third vertical fold line 14, the opening 56 for shaking out becomes small and a sufficient amount of the contents cannot be shaken out.

[0136] The second easy-open finish line 512 extends from the end L1 of the first side edge portion 11 of the first easy-open finish line 511 to the upper edge portion 21, and crosses the upper seal portion 53 on the way there. Therefore, when the second easy-open finish line 512 is cut, the upper seal portion 53 is also cut.

[0137] The third easy-to-open processing line 513 extends in the transverse direction of the blank plate 93, is located on the opening limiting portion 54 side, is between the upper seal portion 53 and the zipper tape 61, and connects from the first side edge portion 11 to the end portion L1) of the first side edge portion 11 of the first easy-to-open processing line 511.

[0138] The end of the third easy-opening processing line 513 on the first side edge 11 side is in contact with the first side edge 11, and a notch 77 (not shown) may be provided at that point. Providing the notch 77 makes initial opening easier.

[0139] Although not shown in the figure, the end of the third easy-opening finish line 513 on the second side edge portion 16 side may be in contact with an intermediate position excluding the end of the second easy-opening finish line 512. In this case, the third easy-opening finish line 513 and the first easy-opening finish line 511 are not connected.

[0140] (Procedure for cutting the easy-open processing line) The procedure for cutting the easy-open processing line 51 in this embodiment will be described. First, the first easy-open finish line 511 is cut from the second side edge 16 to the end L1 of the first side edge side 11 of the first easy-open finish line 511. Then, the second easy-open finish line 512 is cut in a different direction at the end L1 of the first side edge side 11 of the first easy-open finish line 511, passing through the upper seal portion 53 and up to the upper edge portion 21. Then, the pieces of the upper overlapping plate 34 and the side plate 412 of the second top portion are cut off, and the remaining upper seal portion 53 becomes the opening limiting portion 54.

[0141] Since the opening of the zipper tape 61 is restricted by the opening restriction portion 54, the swing-out opening 56 opens to an appropriate size. Therefore, it is easy to control the amount of the contents that swings out.

[0142] As an alternative cutting procedure for the easy-open processing line 51, the first easy-open processing line 511 may be cut from the second side edge 16 to the end L1 of the first side edge 11 of the first easy-open processing line 511, and then the second easy-open processing line 512 may be cut from the upper edge 21 to the end L1 of the first side edge 11 of the first easy-open processing line 511. By doing this, when the first easy-to-open processing line 511 is cut up to the end L1 of the first side edge portion 11, it becomes less likely that the third easy-to-open processing line 513 will be accidentally cut subsequently, and the opening limiting portion 54 will be less likely to be damaged.

[0143] When the remaining amount of contents is small and the contents remaining in the bottom part 73 of the chuck paper container 90 are to be taken out, for example with a spoon, it is necessary to open the top part 71 of the chuck paper container 90 widely. To do this, the third easy-to-open finish line 513 is cut, and the opening limiting part 54 is separated and cut off, so that the shaking opening 56 can be fully opened. The cutting of the third easy-to-open mark 513 may start from the first easy-to-open mark 511 or from the first side edge 11 .

[0144] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0145] In this way, the shaking opening 56 of the resealable paper container 90 can be adjusted to an appropriate opening size according to requirements, making it easy to control the amount of the contents that is shaken out. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0146] Third Embodiment This embodiment will be described with reference to FIG. In this embodiment, the easy-opening processing line 51 consists of a first easy-opening processing line 511, a second easy-opening processing line 512, and a third easy-opening processing line 513, and the above three easy-opening processing lines 51 are connected at the end L1 on the first side edge portion 11 side of the first easy-opening processing line 511.

[0147] The difference from the second embodiment is that the second easy-opening finish line 512 is approximately perpendicular to the upper edge portion 21 and the first easy-opening finish line 511, and connects the upper edge portion 21 and the first easy-opening finish line 511 at the shortest distance. The advantage of this is that the cut length of the easy-opening finish line 51 is the shortest.

[0148] In the procedure for cutting the easy-opening finish line 51, when the first easy-opening finish line 511 is cut from the second side edge 16 side, and then the direction is changed at the end L1 of the first side edge 11 side of the first easy-opening finish line 511 to cut the second easy-opening finish line 512, the change in direction is almost at a right angle, which is difficult. To solve this problem, it is preferable that the second easy-opening finish line 512 is cut from the upper edge 21 side. A notch 77 that serves as a trigger for this may be provided in the upper edge 21.

[0149] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0150] Furthermore, according to this embodiment, the shaking opening 56 of the resealable paper container 90 can be opened to an appropriate size according to requirements, making it easy to control the amount of content that is shaken out. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0151] Fourth embodiment This embodiment will be described with reference to FIG. The easy-open processing line 51 in this embodiment consists of a first easy-open processing line 511, a second easy-open processing line 512, and a third easy-open processing line 513.

[0152] The first easy-to-open line 511 extends transversely across the blank 93 and is located on the side of the opening 56 between the upper seal portion 53 and the zipper tape 61 .

[0153] The end of the first easy-open processing line 511 on the second side edge 11 side is in contact with the second side edge 16, and a notch 77 may be provided at that point. By providing the notch 77, initial opening is made easier.

[0154] An end portion L1 of the first easy-open finish line 511 on the first side edge portion 11 side is in contact with the second easy-open finish line 512. The second vertical fold line 13 is smoothly connected to the first easy-open finish line 511 in a downwardly convex curve, crosses the upper seal portion 53, and reaches the upper edge portion 21 of the resealable paper container 90. The end portion L1 of the first side edge portion 11 of the first easy-open processing line 511 may be located between the second vertical fold line 13 and the third vertical fold line 14. Since the end L1 of the first side edge portion 11 of the first easy-open processing line 511 is located at this position, the shaking opening 56 has an appropriate opening degree, making it easy to control the amount of the contents that is shaken out.

[0155] If the end L1 of the first side edge 11 of the first easy-open processing line 511 is to the left of the second vertical fold line 13, the shaking opening 56 will be larger and will not be significantly different from an opening spanning the entire width of the zippered paper container 90, making it impossible to control the amount of contents that can be shaken out. If the end L1 of the first side edge 11 of the first easy-open processing line 511 is located to the right of the third vertical fold line 14, the opening 56 for shaking out will be small and a sufficient amount of the contents cannot be shaken out.

[0156] The second easy-open finish line 512 extends from the end L1 of the first side edge portion 11 of the first easy-open finish line 511 to the upper edge portion 21, and on the way there, crosses the upper seal portion 53. Therefore, when the second easy-open finish line 512 is cut, the upper seal portion 53 is also cut.

[0157] The third easy-to-open processing line 513 extends in the transverse direction of the blank 93, is located on the opening limiting portion 54 side, is between the upper seal portion 53 and the zipper tape 61, and extends from the first side edge portion 11 in the direction of the first easy-to-open processing line 511. The end portion of the third easy-opening finish line 513 on the first easy-opening finish line 511 side (inner side) reaches the end portion L1 of the first side edge portion side 11 of the first easy-opening finish line 511.

[0158] The end of the third easy-opening processing line 513 on the first side edge 11 side is in contact with the first side edge 11, and a notch 77 (not shown) may be provided at that point. Providing the notch 77 makes initial opening easier.

[0159] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0160] The procedure for cutting the easy-open processing line 51 in this embodiment will be described. First, the first easy-open finish line 511 is cut from the second side edge 16 to the end L1 of the first side edge 11 of the first easy-open finish line 511. Then, the second easy-open finish line 512 is cut in a different direction at the end L1 of the first side edge 11 of the first easy-open finish line 511, passing through the upper seal portion 53 to the upper edge 21, and the corresponding pieces of the upper overlapping plate 34 and the second top portion are cut off. Then, the remaining upper seal portion 53 becomes the opening limiting portion 54.

[0161] Since the opening of the zipper tape 61 is restricted by the opening restriction portion 54, the swing-out opening 56 opens to an appropriate size. Therefore, it is easy to control the amount of the contents that swings out.

[0162] When the amount of contents remaining becomes small and the contents remaining at the bottom need to be removed, for example, with a spoon, it is necessary to open the top part 71 of the zippered paper container 90 widely. To do this, by cutting the third easy-to-open processing line 513, the opening limiting part 54 is cut off and removed, and the shaking opening 56 can be fully opened.

[0163] In this embodiment, it is desirable to start cutting the third easy-open processing line 513 from the first side edge portion 11.

[0164] In the zippered paper container 90 of this embodiment, the cutting of the first easy-open processing line 511 proceeds from the second side edge 16 and after reaching the end L1 of the first side edge 11 of the first easy-open processing line 511, when the cutting transitions to the second easy-open processing line 512, the transition curve is smoothly connected, allowing for a smooth transition and reducing the risk of deviation.

[0165] According to this embodiment, the shaking opening 56 of the resealable paper container 90 can be opened to an appropriate size according to requirements, so that the amount of the contents that is shaken out can be easily controlled. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0166] Fifth embodiment In this embodiment, as shown in FIG. 6, the second easy-opening finish line 512 is inclined in a direction away from the first easy-opening finish line 511 as it moves from the first easy-opening finish line 511 toward the upper edge portion 21.

[0167] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0168] In the zippered paper container 90 of this embodiment, the cutting of the first easy-open processing line 511 proceeds from the second side edge 16 and, after reaching the end L1 of the first side edge 11 of the first easy-open processing line 511, the cutting transitions to the second easy-open processing line 512 at a gentle angle (obtuse angle), allowing for a smooth transition and reducing the risk of deviation.

[0169] Furthermore, according to this embodiment, the shaking opening 56 of the resealable paper container 90 can be opened to an appropriate size according to requirements, making it easy to control the amount of content that is shaken out. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0170] Sixth Embodiment In this embodiment, a notch 77 may be provided at least in one of the following locations: the second side edge 16 of the first easy-to-open processing line 511, the upper edge 21 of the second easy-to-open processing line 512, and the first side edge 11 of the third easy-to-open processing line 513.

[0171] By providing each easy-open processing line 51 with a notch 77, the easy-open processing line 51 can be easily opened initially.

[0172] In the easy-opening processing line 51 of this embodiment, since the main opening is performed by cutting the first easy-opening processing line 511, the notch 77 may be provided only in the first easy-opening processing line 511. Alternatively, the notch 77 of the first easy-opening processing line 511 may be made larger than the other easy-opening processing lines or may be made noticeable by printing or the like.

[0173] If the opening direction of the second easy-opening processing line 512 and the third easy-opening processing line 513 is expected to be from the first easy-opening processing line 511 side (inner side), notches 77 do not need to be provided in the second easy-opening processing line 512 and the third easy-opening processing line 513.

[0174] 6 to 10 and 13 to 21, a notch 77 is provided on the second side edge 16 side of the first easy-open processing line 511. In FIG. 13, a notch 77 is provided on the upper edge 21 side of the second easy-open processing line 512 . In FIG. 14, a notch 77 is provided on the side of the third easy-open processing line 513 toward the first side edge portion 11 . The above drawings are merely examples, and the location where the notch 77 is provided is not limited to these, and may be appropriately selected.

[0175] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0176] Furthermore, according to this embodiment, the shaking opening 56 of the resealable paper container 90 can be opened to an appropriate size according to requirements, making it easy to control the amount of content that is shaken out. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0177] Seventh embodiment The present embodiment will be described with reference to FIG. In this embodiment, an opening limiting portion 54 as shown in Figure 6 is formed, and the transverse range of the upper overlapping plate 34 formed by the opening limiting portion 54 is from the first side edge portion 11 or the vicinity of the first side edge portion 11 to approximately the center of the upper overlapping plate 34 in the width direction.

[0178] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0179] When the upper edge of the open swing-out opening 56 is viewed from above, it is opened by utilizing three folding lines and the inner edge of the opening limiting portion 54. The three folding lines are the third vertical folding line 14b on the front side, the third vertical folding line 14a on the back side, and the fourth vertical folding line 15.

[0180] In the resealable paper container 90 of this embodiment, the opening width of the shaking opening 56 is approximately half the width of the resealable paper container 90, so that the opening is well-balanced and it is easy to control the amount of contents that shakes out.

[0181] According to this embodiment, the shaking opening 56 of the resealable paper container 90 can be opened to an appropriate size according to requirements, so that the amount of the contents that is shaken out can be easily controlled. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0182] Eighth embodiment The present embodiment will be described with reference to FIG. In this embodiment, an opening limiting portion 54 as shown in Figure 15 is formed, and the transverse range of the blank 93 formed by the opening limiting portion 54 is from the first side edge portion 11 or the vicinity of the first side edge portion 11 to the second vertical fold line 13 closer to the first side edge portion 11 or the vicinity of the second vertical fold line 13, among the vertical fold lines forming the ridge portion 72d of the body 72 of the zippered paper container 90.

[0183] By doing so, the width of the opening of the shaking opening 56 becomes the maximum within the range where there is a significant difference in the openness compared to when the top part 71 of the zippered paper container 90 is fully opened. When the openness is larger than this, there is no significant difference from the fully opened state.

[0184] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0185] When the upper edge of the open swing-out opening 56 is viewed from above, it is opened using four folding lines. The four folding lines are the second vertical folding line 13, the third vertical folding line 14b on the front side, the third vertical folding line 14a on the back side, and the fourth vertical folding line 15.

[0186] In the resealable paper container 90 of this embodiment, the opening 56 for shaking is large, so that the contents can be easily shaken out, and the opening 56 for shaking is formed using four fold lines, so that the container is easy to open.

[0187] According to this embodiment, the shaking opening 56 of the resealable paper container 90 can be opened to an appropriate size according to requirements, so that the amount of the contents that is shaken out can be easily controlled. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0188] Ninth embodiment This embodiment will be described with reference to FIG. In this embodiment, an opening limiting portion 54 as shown in Figure 16 is formed, and the transverse range of the blank 93 formed by the opening limiting portion 54 is from the first side edge portion 11 or the vicinity of the first side edge portion 11 to the third vertical fold line 14 closer to the second side edge portion 16, or the vicinity of the third vertical fold line 14, among the vertical fold lines forming the ridge portion 72d of the body portion 72 of the zippered paper container 90. By doing so, the opening of the swing-out opening 56 is minimized in practical terms.

[0189] When viewed from above, the opening 56 for the extension is opened by utilizing two folding lines. The two folding lines are the third vertical folding line 14 and the fourth vertical folding line 15. The side plates 412 of the second top part on the front and back sides connected to the second side edge part 16 of the upper overlapping plate 34 are curved, thereby opening the opening 56 for the extension.

[0190] In the resealable paper container 90 of this embodiment, the shaking opening 56 is appropriately small, making it easy to shake out a small amount of the contents.

[0191] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0192] According to this embodiment, the shaking opening 56 of the resealable paper container 90 can be opened to an appropriate size according to requirements, so that the amount of the contents that is shaken out can be easily controlled. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0193] Tenth embodiment This embodiment will be described with reference to FIG. In this embodiment, the opening limiting portion 54 shown in FIG. 17 is formed, and the range in the transverse direction of the blank 93 formed by the opening limiting portion 54 is as follows.

[0194] Here, the distance between the third vertical folding line 14 and the fourth vertical folding line 15 is defined as a distance X. The range of the opening limiting portion 54 is from the first side edge 11 or the vicinity of the first side edge 11 to a position away from the third vertical folding line 14 in the direction of the first side edge 11 by the above-mentioned distance X.

[0195] In addition, when the upper edge of the opened swing-out opening 56 is viewed from above, it is opened by utilizing three folding lines and the inner end of the opening limiting portion 54. The three folding lines are the third vertical folding line 14b on the front side, the third vertical folding line 14a on the back side, and the fourth vertical folding line 15.

[0196] In the resealable paper container 90 of this embodiment, when the upper edge of the shaking opening 56 is viewed from above, the four sides are equilateral, so the appearance is well-balanced.

[0197] The dimensions, shape, materials, etc., other than the easy-open processing line 51 are the same as those of the first embodiment.

[0198] According to this embodiment, the shaking opening 56 of the resealable paper container 90 can be opened to an appropriate size according to requirements, so that the amount of the contents that is shaken out can be easily controlled. Furthermore, in order to remove any contents remaining in the bottom portion 73 of the resealable paper container 90, the top portion 71 can be easily opened over substantially the entire width.

[0199] Eleventh Embodiment In this embodiment, as shown in FIG. 18, an opening assistance line 55 is provided on at least one of the top panels 33 on the front or back of a paper container 90 with a zipper.

[0200] The dimensions, shapes, materials, and the like of each element other than the opening assistance line 55 are the same as those of the first embodiment. The opening assistance line 55 is formed in the same manner as the other folding lines provided on the blank plate 93.

[0201] When the opening 56 for shaking is opened in the zippered paper container 90, the top panel 33 is deformed from a flat surface into a three-dimensional shape as the container is opened. In this case, the top panel 33 can be deformed even without the opening assistance lines 55, but if the opening assistance lines 55 are present, the top panel 33 can be easily deformed by appropriately folding the opening assistance lines 55.

[0202] When the opening 56 for the swing-out is opened, the second top side protrusion (ear) portion 392 on the second side edge portion 16 side is also significantly deformed, but since the second top side diagonal fold line 172 breaks at that time, the deformation can be easily achieved.

[0203] Therefore, in the resealable paper container 90 of this embodiment, by providing the opening assistance line 55, the shaking opening 56 can be easily opened.

[0204] First aspect of the twelfth embodiment In this embodiment, as shown in Figure 18, the intersection of a virtual line extending vertically from the end L3 of the second side edge portion 16 (inner side) of the opening limiting portion 54 toward the lower edge portion 26 and the first horizontal fold line 22 is the inner side reference point L4 of the opening auxiliary line 55.

[0205] An inner end 551 of the opening auxiliary line 55 exists at or near the inner reference point L4 of the opening auxiliary line 55. An outer end 552 of the opening auxiliary line 55 exists at or near the second top intersection point F, which is the intersection point of the third vertical fold line 14 and the second horizontal fold line 23.

[0206] In other words, the opening auxiliary line 55 is located on a line connecting the inner reference point L4 of the opening auxiliary line 55 or the vicinity of that reference point L4 and the second top intersection point F, which is the intersection point of the third vertical fold line 14 and the second horizontal fold line 23, or the vicinity of the second top intersection point F.

[0207] The dimensions, shapes, materials, and the like of each element other than the opening assistance line 55 are the same as those of the first embodiment.

[0208] In the zippered paper container 90 of this embodiment, the opening assistance line 55 is provided in a location where the top panel 33 is likely to deform when the shaking opening 56 is opened, making it easy to open the shaking opening 56.

[0209] Second aspect of the twelfth embodiment This embodiment will be described with reference to FIG. The opening assistance line 55 of this embodiment is on the same line as the opening assistance line 55 of the first embodiment of the twelfth embodiment shown in Fig. 18, but is shorter. Its inner end 551 is located away from the inner reference point L4 of the opening assistance line 55, and its outer end 552 may also be located away from the second top intersection point F. The distance between them may be 2 mm or more and 10 mm or less.

[0210] In the zippered paper container 90 of this embodiment, the opening assistance line 55 has sufficient bending properties, so that the shaking opening 56 is easy to open. Furthermore, since the folding lines are not concentrated at the inner reference point L4 and the second top intersection point F of the opening auxiliary line 55, the reduction in strength of the blank plate 93 at these locations can be reduced.

[0211] Third aspect of the twelfth embodiment This embodiment will be described with reference to FIG. The opening assist line 55 of this embodiment is on the line of the opening assist line 55 of the first embodiment of the twelfth embodiment shown in FIG. 18, but is shorter. The inner end 551 of the opening auxiliary line 55 may be located at the inner reference point L4 of the opening auxiliary line 55 or in the vicinity of the reference point L4. The outer end 552 of the opening assistance line 55 may be located away from the second top intersection point F. The distance may be 2 mm or more and 20 mm or less.

[0212] In the zippered paper container 90 of this embodiment, the opening assistance line 55 has sufficient bending properties, so that the shaking opening 56 is easy to open. In addition, since the bending lines are not concentrated at the second top intersection point F2, the reduction in strength of the blank plate 93 at that location can be reduced. Cut.

[0213] Fourth aspect of the twelfth embodiment This embodiment will be described with reference to FIG. The opening assist line 55 of this embodiment is on the line of the opening assist line 55 of the first embodiment of the twelfth embodiment shown in FIG. 18, but is shorter. The inner end 551 of the opening assistance line 55 may be located at a position spaced apart from the inner reference point L4 of the opening assistance line 55. The distance therebetween may be 2 mm or more and 20 mm or less. The outer end 552 of the opening auxiliary line 55 may be located at the second top intersection point F, which is the intersection point between the third vertical fold line 14 and the second horizontal fold line 23, or in the vicinity of the second top intersection point F.

[0214] In the zippered paper container 90 of this embodiment, the opening assist line 55 has sufficient bending property, so that the shaking opening 56 is easy to open. Also, since the folding lines are not concentrated at the inner reference point L4 of the opening assist line 55, the decrease in strength of the blank plate 93 at those places can be reduced. EXAMPLES

[0215] The present invention 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. 8 was produced using a blank plate 93 in FIG. 5 corresponding to the first embodiment.

[0216] Two blank sheets 10a, 10b as shown in Fig. 5 were prepared, and the inner surfaces of the blank sheets 10a, 10b were aligned and overlapped, and the side edge seal portions 371, 372 of the opposing sides were heat-sealed as shown in Fig. 6, 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 38 was not sealed was produced.

[0217] Next, it was raised into a three-dimensional shape as shown in FIG. 7 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.

[0218] The laminated sheet 78 of the blank plate 93 had the following structure. (Outer surface) Printed layer (gravure printing) / LDPE layer (thickness 20 μm) (Japan Polyethylene, LC520) / Paper base layer (Nippon Paper Industries, liquid paper container base paper) (150g / m 2 ) / EMAA (20μm) (Mitsui Dow Polychemical, N0908N) / Silica-deposited PET (12μm) (Dai Nippon Printing, IB-PET-UBP) / LDPE layer (40μm) (Japanese polyethylene, LC520) (inner surface)

[0219] A method for producing the laminated sheet 78 will now be described. First, an LDPE layer (20 μm) was formed on the outer surface of the paper base layer by extrusion lamination. Next, silica-deposited PET (12 μm) was laminated on the inner surface of the paper base layer by extrusion lamination (sandwich lamination) with molten EMAA (20 μm) interposed therebetween.

[0220] Next, an LDPE layer (40 μm) was formed by extrusion lamination on the opposite side (inner side) of the paper base layer of silica-deposited PET (12 μm). Next, a design was printed by a gravure printer on the outer surface of the LDPE layer (20 μm) formed on the outer surface of the paper base layer. In addition, after printing on the paper base layer, an LDPE layer (20 μm) may be formed on the outer surface of the paper base layer by extrusion lamination. Also, after printing on the paper base layer, extrusion lamination on the outer surface is not necessary.

[0221] 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.

[0222] Next, the laminated sheet 78 was subjected to scoring and punching to complete a blank plate 93 .

[0223] The zipper tape 61 which is attached by heat sealing to the inner surfaces of the upper overlapping plates 34a, 34b and the top side plates 41a, 41b of the zippered paper container 90 has a two-layer laminated structure for both the male tape body and the female tape body, with the resin layer on the side which is heat sealed to the zippered paper container 90 being formed of LLDPE and the resin layer on the opposite side being formed of MDPE, and both the male and female mating parts being formed of LLDPE, and the tape body width for both parts being 13 mm.

[0224] The dimensions of the back blank plate 10a and the front blank plate 10b are rectangular, measuring 220 mm in length and 169 mm in width, and the surrounding edges are provided with a sealing allowance, with a first side edge seal allowance 371 having a width of 7 mm provided on the first side edge 11 on the left side, and a second side edge seal allowance 372 having a width of 7 mm provided on the second side edge 16 on the right side. Additionally, the lower edge 26 of the lower side was provided with a bottom side seal margin 38 having a width of 10 mm. Further, a seal margin of an upper seal portion 53 having a width of 7 mm was provided near the upper edge portion 21 of the upper overlapping plate 34 and the side plate 41 of the top portion.

[0225] 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 front bottom panel 35.

[0226] In addition, a first top side plate 411 is provided on the outer left side of the upper overlapping plate 34 via the second vertical folding line 13, and a second top side plate 412 is provided on the outer right side of the upper overlapping plate 34 via the third vertical folding line 14.

[0227] In addition, a first top side protrusion (ear) portion 391 is provided on the outer left side of the top panel 33, via the second vertical fold line 13, and a second top side protrusion (ear) portion 392 is provided on the outer right side of the top panel 33, via the third vertical fold line 14.

[0228] In addition, a first side panel 321 is provided on the outer left side of the wall panel 31 via a second vertical folding line 13, and a second side panel 322 is provided on the outer right side of the wall panel 31 via a third vertical folding line 14.

[0229] In addition, a first bottom side protrusion (ear) portion 431 is provided on the outer left side of the bottom panel 35, via a second vertical fold line 13, and a second bottom side protrusion (ear) portion 432 is provided on the outer right side of the bottom panel 35, via a third vertical fold line 14.

[0230] The completed paper container had a roughly rectangular parallelepiped shape with dimensions of 95 mm width, 120 mm height, and 60 mm depth.

[0231] Furthermore, on the upper overlapping plate 34 and the top side plate 41, a first easy-to-open processing line (perforation line) 511 and a third easy-to-open processing line 513 (perforation line) are printed in the transverse direction on the paper base layer 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 6.

[0232] In addition, the second easy opening process line 512 was provided from an end L1 of the first side edge portion 11 of the first easy opening process line 511 where the first easy opening process line 511 and the third easy opening process line 513 are connected, to the upper edge portion 21. The end L1 of the first side edge portion 11 of the first easy opening process line 511 was located in the center in the width direction of the zippered paper container 90. The second easy opening process line 512 was inclined in a direction away from the first easy opening process line 511 as it went from the first easy opening process line 511 toward the upper edge portion 21, and intersected with the upper edge portion 21 at 45°. In addition, the second easy-open processing line 512 is also provided with printing.

[0233] In addition, below the first easy-open processing line 511 and the third easy-open processing line 513, a zipper tape 61 (width 13 mm) is heat-sealed to the inner surface of the upper overlapping plate 34 and the top side plate 41 with a gap of 5 mm.

[0234] In addition, after joining the two blank sheets 10a, 10b, heat sealing the zipper tape 61, heat sealing the side edge seal margins 371, 372, and heat sealing the upper seal portion 53 in the above-mentioned manner, a notch 77 was provided on the second side edge 16 side of the overlapping first easy-open processing line (perforation line) 511, and a zippered paper container (flat state) 91 in the intermediate stage with the bottom 73 in an unsealed state was produced (see FIG. 6).

[0235] 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 71 made of the top plate 33, and furthermore, in the horizontal cross section (plane approximately parallel to the bottom surface), a substantially rectangular body 72 was continued, and an intermediate stage paper container with a zipper (standing state) 92 with a substantially rectangular opening at the bottom 73 was formed (see FIG. 7).

[0236] 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.

[0237] Furthermore, the top protrusions (ears) 74 connected to both the left and right sides of the top 71 of the resealable paper container 90 are joined to the body 72 of the resealable paper container 90. This joining is achieved by melting the LDPE layer on the surface below the top protrusions (ears) 74 and the LDPE layer on the surface of the body 72 with hot air, thereby thermally welding them together.

[0238] Example 2 FIG. 13 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper. The only differences from Example 1 were the shape of the easy-open processing line 51 and the fact that a notch 77 was processed at the position where the second easy-open processing line 512 and the upper edge portion 21 meet; the shapes, materials, processing methods, etc. of other parts were the same as in Example 1.

[0239] Example 3 FIG. 14 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper. The only differences from Example 1 were the shape of the easy-open processing line 51 and the fact that a notch 77 was processed at the position where the third easy-open processing line 513 meets the first side edge portion 11; the shapes, materials, processing methods, etc. of other parts were the same as those of Example 1.

[0240] Example 4 FIG. 15 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper.

[0241] The position of the second easy-open finish line 512 was moved horizontally without changing the inclination to the vicinity of the second vertical fold line 13, thereby reducing the horizontal width of the opening limiting portion 54. The end portion of the opening limiting portion 54 on the second side edge portion 16 side was located in the vicinity of the second vertical fold line 13. In accordance with the movement of the second easy-opening finish line 512, the end portion L1 of the first side edge portion 11 of the first easy-opening finish line 511 has also moved to the vicinity of the second vertical fold line 13.

[0242] The only difference from Example 1 was the position of the easy-open processing line 51. The shape, material, processing method, etc. of the other parts were the same as those of Example 1.

[0243] Example 5 FIG. 16 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper.

[0244] The position of the second easy-open finish line 512 was moved horizontally without changing the inclination to the vicinity of the third vertical fold line 14, and the horizontal width of the opening limiting portion 54 was increased. The end portion of the opening limiting portion 54 on the second side edge portion 16 side was located in the vicinity of the third vertical fold line 14. In accordance with the movement of the second easy-open finish line 512, the end portion L1 of the first side edge portion 11 of the first easy-open finish line 511 has also moved to the vicinity of the third vertical fold line 14.

[0245] The only difference from Example 1 was the position of the easy-open processing line 51. The shape, material, processing method, etc. of the other parts were the same as those of Example 1.

[0246] Example 6 FIG. 17 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper.

[0247] The position of the second easy-open process line 512 was moved laterally without changing the inclination to a position described below. The position was the distance X (here, 30 mm) between the third vertical folding line 14 and the fourth vertical folding line 15. The position was the distance X (here, 30 mm) away from the third vertical folding line 14 in the direction of the first side edge portion 11. In accordance with the movement of the second easy-opening finish line 512, the end portion L1 of the first side edge portion 11 of the first easy-opening finish line 511 has also moved to a position corresponding to the above.

[0248] The only difference from Example 1 was the position of the easy-open processing line 51. The shape, material, processing method, etc. of the other parts were the same as those of Example 1.

[0249] Example 7 FIG. 18 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper. The only difference from Example 1 was that opening assistance lines 55 were provided; the shapes, materials, processing methods, and the like of other parts were the same as those of Example 1.

[0250] Example 8 FIG. 19 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper. The only difference from Example 1 was that opening assistance lines 55 were provided; the shapes, materials, processing methods, and the like of other parts were the same as those of Example 1.

[0251] Example 9 FIG. 20 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper. The only difference from Example 1 was that opening assistance lines 55 were provided; the shapes, materials, processing methods, and the like of other parts were the same as those of Example 1.

[0252] Example 10 FIG. 21 shows the shape of a paper container (flat state) 91 at an intermediate stage when making a paper container 90 with a zipper, and a blank plate 93 at the previous stage was prepared to make the paper container 90 with a zipper. The only difference from Example 1 was that opening assistance lines 55 were provided; the shapes, materials, processing methods, and the like of other parts were the same as those of Example 1.

[0253] Comparative Example 1 In Comparative Example 1, a paper container 80 with a zipper shown in FIG. 2 was produced using one blank plate 81 shown in FIG.

[0254] In Comparative Example 1, the blank plate 81 was first folded at the intermediate horizontal folding line 821, and the inner faces of the front blank plate 811b (the side where the wall plate 831b exists) and the back blank plate 811a (the side where the wall plate 831a exists) were overlapped. The method of producing the resealable paper container 80 thereafter was the same as that of Example 1, except that the upper seal portion 53 was not formed. In addition, the shape of the easy-open processing line 851 was different, but the shapes, materials, processing methods, etc. of the parts other than the top portion 871 were the same as in Example 1.

[0255] Evaluation 100 pieces of each of the paper containers with zippers of Examples 1 to 10 and Comparative Example 1 were produced. In addition, when producing the chuck-equipped paper container 80 of Comparative Example 1, 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.

[0256] 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.

[0257] Moreover, if the intermediate horizontal folding line (half folding line) 821 is folded more carefully, the time required for production increases, which may result in a decrease in the production capacity of the resealable paper container 80.

[0258] In contrast, in the present invention, in which a paper container 90 with a zipper 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 resealable paper container 90 of the present invention, the production capacity is not reduced and the occurrence of defects can be reduced.

[0259] The zippered paper containers 90 of Examples 1 to 10 and Comparative Example 1 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 side seal tab 38 was heat sealed, and the heat sealed portion was laid down toward the back side bottom plate 35a. Furthermore, the bottom side protruding portions (ears) 75 protruding from both the left and right sides of the bottom 73 were folded toward the bottom plate 35 and heat sealed to the front side bottom plate 35b and / or the front side bottom side seal tab 38b, completing the packages of the zippered paper containers 90 of Examples 1 to 10 and Comparative Example 1 having a substantially rectangular parallelepiped shape.

[0260] Furthermore, the packages of the resealable paper containers 90 of Examples 1 to 10 and Comparative Example 1 prepared as described above were tested, particularly with regard to their ease of opening, suitability for removing the contents, and resealability with the resealable zipper.

[0261] In the packaging body of the zippered paper container 90 of Examples 1 to 10, the second side edge 16 of the upper seal portion 53 can be easily cut off by the notch 77 provided as opening means on the upper overlapping plate 34 and the upper part of the top side plate 41, and the first easy-to-open processing line (perforation line) 511 and / or the second easy-to-open processing line 512 (perforation line), and the opening limiting portion 54 is formed to an appropriate size, thereby forming the shaking opening 56.

[0262] 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 at the top of the package of the chuck-equipped paper container 90 was opened over a desired appropriate width, so that the flour filled inside could be shaken out in a desired amount.

[0263] In addition, after removing a portion of the flour, the zipper could be easily reattached and the paper container resealed in each of the packages of the resealable paper container 90 of Examples 1 to 10, and the remaining flour could be properly preserved.

[0264] In addition, when most of the flour has been used and only a small amount remains, the opening limiting portion 54 is cut off by opening the third easy-to-open processing line 513, and the top portion 71 of the zippered paper container 90 opens almost entirely, allowing the wheat to be removed without waste.

[0265] On the other hand, when the easy-open processing line 851 of the chuck-equipped paper container 80 of Comparative Example 1 was cut, the top part 871 was completely opened. When flour was shaken out in this state, it was difficult to control the amount of flour shaken out, and more flour than desired was shaken out.

[0266] 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]

[0267] 10a Back blank plate 10b Front blank plate 11 First side edge 12 First vertical fold line 13 Second vertical fold line 14 Third vertical fold line 15 Fourth vertical fold line 16 Second side edge 17 Top side diagonal fold line 171 First top diagonal fold line 172 Second top diagonal fold line 18 Bottom diagonal fold line 181 First bottom diagonal fold line 182 Second bottom diagonal fold line 21 Upper edge 22 First horizontal fold line (lower side of upper overlapping plate) 23 Second horizontal fold line (bottom of top panel) 24 Third horizontal bend line (bottom of wall panel) 25 Fourth horizontal fold line (bottom side of bottom panel) 26 Lower edge 31 Wall Panel 32 Side plate 321 First side plate 322 Second side plate 33 Top plate 34 Upper overlapping plate 35 Bottom plate 37 Side edge seal allowance 371 First side edge seal allowance 372 Second side edge seal allowance 38 Bottom seal 39 Top side protruding part (ear part) allowance 391 First top edge protrusion (ear) 392 Second top protruding part (ear part) 41 Side plate of upper overlapping plate 411 Side plate of first upper overlapping plate 412 Side plate of second upper overlapping plate 43 Bottom side protruding part (ear) allowance 431 First bottom protruding part (ear) 432 Second bottom protruding part (ear) allowance 51 Easy-open processed wire 511 First easy-to-open processing line (opening side) 512 Second easy-open processing line (crossing the upper seal) 513 Third easy-open processing line (opening restriction side) 52 Zipper tape joint 53 Upper seal part 54 Opening restriction 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 61 Zipper Tape 71 Top of zippered paper container 71d Corner of the top 72 Body of a paper container with a zipper 72d Ridge of the torso 73 Bottom of zippered paper container 73d Bottom corner 74 Top protruding part (ear) 75 Bottom protrusion (ear) 76 Bending part of the top protruding part (ear part) 77 Notch 78 Laminated sheet of paper container (not shown) 80 Conventional paper container with zipper 81 Prior art blank plate 811 First vertical folding line of the prior art 812 Second vertical fold line of the prior art 813 Diagonal fold line on top side of conventional technology 814 Diagonal fold line on bottom side of conventional technology 821 Prior art intermediate horizontal fold line (half fold line) 822 First horizontal bending line of the conventional technology (lower side of the upper overlapping plate) 823 Second horizontal folding line of the conventional technology (bottom of the top panel) 824 Third horizontal bend line of the conventional technology (bottom side of wall panel) 825 Fourth horizontal fold line of the prior art (lower side of bottom panel) 831 Prior art wall panels 832 Side plate of the prior art 833 Conventional top panel 834 Prior art upper overlapping plate 835 Prior art bottom plate 836 Side edge seal of the conventional technology 837 Bottom seal of conventional technology 838 Conventional technology top side protrusion (ear) 841 Prior art bottom protrusion (ear) 843 Side plate of upper overlapping plate of the prior art 851 Prior art easy-open processing line 856 Prior art swing-out opening 861 Prior art zipper tape 871 Top of a paper container with a zipper according to the prior art 872 Body of a paper container with a zipper according to the prior art 874 Top protrusion (ear) of conventional technology 876 Bending part of the top protruding part (ear part) of the conventional technology 877 Prior Art Notch 90 Paper container with zipper of the present invention 91 Paper container with a zipper in the intermediate stage of the present invention (flat state) 92 Paper container with a zipper in the intermediate stage of the present invention (in a raised state) 93 Blank plate of the present invention E1 First top intersection (intersection of the first vertical fold line and the first horizontal fold line) E2 First intersection of the two top parts (intersection of the fourth vertical fold line and the first horizontal fold line) F1 Second top intersection (intersection of second vertical fold line and second horizontal fold line) F2 Second intersection point (intersection point of third vertical fold line and second horizontal fold line) G1 First bottom intersection (intersection of the first vertical fold line and the fourth horizontal fold line) G2 First bottom intersection (intersection of fourth vertical fold line and fourth horizontal fold line) H1 Second bottom intersection (intersection of the second vertical fold line and the third horizontal fold line) H2 Second bottom intersection (intersection of the third vertical fold line and the third horizontal fold line) L1 End (branch point) of the first side edge (one side) of the first easy-open processing line L3 Reference point of the opening restriction (intersection of the bottom edge of the upper seal and the easy-open processing line) L4 Reference point on the inner side of the opening auxiliary ruled line (the intersection of the vertical imaginary line extending from the reference point of the opening restriction to the bottom side and the second horizontal folding line)

Claims

[Claim 1] A paper container with a zipper is assembled by joining two blank plates made of a laminated sheet based on paper, A top part including an upper overlapping plate that is joined by overlapping the blank plate to the upper part of the zipper-equipped paper container, and a top plate that is connected to the lower side of the upper overlapping plate; A side plate of a first top portion connected to one end of the upper overlapping plate; A side plate of a second top portion connected to the other end 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, the first top side plate, and the second side plate; a zipper tape located below the upper seal portion and extending across the upper overlapping plate, the side plate of the first top portion, and the side plate of the second top portion; an opening limiting portion is provided in which the upper seal portion is partially left; The opening limiting portion is formed by cutting the easy-open processing line, At least a portion of the easy-open processing line extends between the top seal portion and the zipper tape, A paper container with a zipper, wherein at least a portion of the easy-open processing line crosses the upper seal portion.

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