Zippered paper container

Abstract

To provide a paper container 90 with a chuck described in the disclosure, the paper container 90 with a chuck provided with an easy opening seal part 53 in order to seal a top part 71 thereof and enabling the easy opening seal part 53 to be easily peeled off, when a user peels off the part in order to take out contents.SOLUTION: In a paper container 90 with a chuck, in which a front-side blank plate 10b and a rear-side blank plate 10a which are formed of laminated sheets 78 including paper base material layers 782 are fabricated, opening / gripping margins 57 are provided in an upper superposed plate 34 and an upper edge part 21 of a side plate 41 of a top part, and opening-starting parts 55 are provided in an easy opening seal part 53, positioned below the easy opening / gripping margins 57 and crossing the upper superposed plate 34 and the side plate 41 of the top part and the upper edge parts 21, of at least either of the front-side blank plate 10b and the rear-side blank plate 10a.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a resealable paper container, and particularly to a resealable paper container in the field of paper containers that have a three-dimensional shape and are self-supporting, and which has an opening that is easy to open. [Background technology]

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

[0003] The above technology can protect the contents and prevent spillage 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 have been consumed. Figure 13 shows a blank plate 81 used to manufacture a paper container 80 with a zipper of the prior art, Figure 14 shows a perspective view of the paper container 80 with a zipper of the prior art, and Figure 15 shows a perspective view of the paper container with the top open.

[0004] 14, unless otherwise specified, the front wall panel 831b is the front, and the front, back, left, right, top, and bottom sides of the resealable paper container 80 are indicated. The same applies to the resealable paper container 90 of the present disclosure.

[0005] Furthermore, the reference numerals used when describing the prior art are in the 80s or 800s to distinguish them from the present disclosure. Furthermore, the subscript a of a 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, a symbol without a subscript may include both a and b.

[0006] In the resealable paper container 80 described in Patent Document 1, when opening the top portion 871 and removing the contents, the protrusion 874 on the top surface is first removed from the body portion 872, then the easy-open processing line 851 is cut, and then the male and female mating portions of the zipper tape 861 are released to open the removal opening 856 (see FIG. 15). The contents are then removed through the removal opening 856.

[0007] When opening the zipper tape 861, the front opening grip margin 857b above the front zipper tape 861b and the back opening grip margin 857b above the back zipper tape 861a are grasped with the fingers, respectively, to open the resealable paper container 80 in the front-to-back direction. At this time, the front opening grip margin 857b and the back opening grip margin 857a sometimes come into close contact with each other, eliminating a gap. This makes it difficult to insert the fingers, making it difficult to release the zipper tape 861 and opening the resealable paper container 80.

[0008] When manufacturing resealable paper container 80, there is a process of folding middle horizontal folding line 821 of blank plate 81, and there is a risk of accidentally folding nearby easy-open processing line 851 during this process. In addition, easy-open processing line 851 is a weak part of blank plate 81, and if easy-open processing line 851 is accidentally folded in other manufacturing processes as well, it becomes difficult to manufacture resealable paper container 80, and blank plate 81 becomes a defective product and is discarded. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-178833 Summary of the Invention [Problem to be solved by the invention]

[0010] The present disclosure has been made to solve the above problems, and uses an opening means that replaces the easy-open processing line as a means for initial opening in a resealable paper container 90. The objective is to provide a resealable paper container 90 that uses this opening means to reduce failures and loss of blank plates 10 when the resealable paper container 90 is manufactured. Furthermore, the present invention provides a paper container 90 with a zipper that is easy to open when a user initially opens the opening means of the paper container 90 with a zipper by hand or fingers. [Means for solving the problem]

[0011] The above problems can be solved by the following embodiments of the present disclosure. That is, the resealable paper container 90 of the present disclosure has the following features: In a paper container 90 with a zipper, a blank plate 10 made of a laminated sheet 78 including a paper base layer 782 is assembled. The blank plate 10 includes at least a front blank plate 10b and a back blank plate 10a, A top portion 71 is provided at the top of the zipper-equipped paper container 90, and includes an upper overlapping plate 34 where the front blank plate 10b and the back blank plate 10a are overlapped and joined, and a top plate 33 connected to the lower side of the upper overlapping plate 34; Side plates 41 of the top portion connected to both the left and right sides 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; The upper overlapping plate 34 and the upper edge 21 of the top side plate 41 have an opening grip 57, An easy-open seal portion 53 is located below the opening grip portion 57 and crosses the upper overlapping plate 34 and the side plate 41 of the top portion; a zipper tape 61 located below the easy-open seal portion 53 and extending across the upper overlapping plate 34 and the side plate 41 of the top portion; At least the front blank plate 10b or the back blank plate 10a has an opening catch 55 at the upper edge 21 thereof.

[0012] In addition, in the resealable paper container 90 of the present disclosure, An opening tab 55 may be provided on the upper edge 21 of both the front blank plate 10b and the back blank plate 10a.

[0013] In addition, in the resealable paper container 90 of the present disclosure, The opening hook 55 may include a cutout portion 551 .

[0014] In addition, in the resealable paper container 90 of the present disclosure, The front cutout portion 551b provided on the front blank plate 10b and the back cutout portion 551a provided on the back blank plate 10a do not have to overlap.

[0015] In addition, in the resealable paper container 90 of the present disclosure, The opening hook 55 may include a notch 552 .

[0016] In addition, in the resealable paper container 90 of the present disclosure, The cutouts 552 may be two or more in parallel. [Effects of the Invention]

[0017] According to the above-described embodiment of the present disclosure, the following resealable paper container can be provided. That is, the blank plate 10 of the resealable paper container 90 of the present disclosure is provided with an opening catch 55 on the upper edge 21, i.e., above the easy-open seal portion 53. When a user opens the easy-open seal portion 53 provided on the top portion 71 of the resealable paper container 90 containing the contents, the opening catch 55 acts to form a gap between the front opening grip margin 57b and the back opening grip margin 57a, which are located above the easy-open seal portion 53. This makes it easier for the user to insert their fingers between the front opening grip margin 57b and the back opening grip margin 57a, making it easier for them to grasp the front opening grip margin 57b and the back opening grip margin 57a ​​with their fingers.

[0018] When a user grasps the front opening grip portion 57b and the back opening grip portion 57a ​​with their fingers and opens the resealable paper container in the front-to-rear direction, the easy-open seal portion 53 peels off. Therefore, a resealable paper container 90 can be provided that is easy to open when the user peels off the easy-open seal portion 53 of the resealable paper container 90 to remove the contents. [Brief explanation of the drawings]

[0019] [Figure 1A] FIG. 2 is a development view of a back blank plate 10a used to manufacture a resealable paper container 90 according to a first aspect of the first embodiment of the present disclosure. [Figure 1B] FIG. 1 is a development view of a front blank plate 10b used to manufacture a resealable paper container 90 according to a first aspect of a first embodiment of the present disclosure. [Figure 2] FIG. 2 is a front view showing the shape of a paper container (flat state) 91 at an intermediate stage when a paper container 90 with a zipper is produced using the blank plate 10 shown in FIGS. 1A and 1B. [Figure 3] FIG. 2 is a perspective view showing the shape of a paper container (in a box-formed state) 92 at an intermediate stage when a paper container 90 with a zipper is produced using the blank plate 10 shown in FIGS. 1A and 1B. [Figure 4] FIG. 2 is a perspective view of a resealable paper container 90 produced using the blank plate 10 shown in FIGS. 1A and 1B. [Figure 5]FIG. 5 is a side view of the resealable paper container 90 shown in FIG. 4. [Figure 6] FIG. 5 is a plan view of the resealable paper container 90 shown in FIG. 4. [Figure 7] 10 is a perspective view of a resealable paper container 93 with a top-side protrusion 74 raised. FIG. [Figure 8] 10 is a perspective view of a resealable paper container 94 with an open top portion 71. FIG. [Figure 9A] 1 is a cross-sectional view of a laminated sheet 78 of one embodiment of the blank plate 10. FIG. [Figure 9B] 10 is a cross-sectional view of a laminated sheet 78 of another embodiment of the blank plate 10. FIG. [Figure 9C] 10 is a cross-sectional view of a laminated sheet 78 of still another embodiment of the blank plate 10. FIG. [Figure 9D] 10 is a cross-sectional view of a laminated sheet 78 of still another embodiment of the blank plate 10. FIG. [Figure 10A] 2 is an enlarged cross-sectional view of one embodiment of a joining portion between a blank plate 10 and a zipper tape 61 (see cross-sectional position CC in FIG. 2). [Figure 10B] 2 is an enlarged cross-sectional view of another embodiment of the joining portion between the blank plate 10 and the zipper tape 61 (see cross-sectional position CC in FIG. 2). [Figure 11A] 2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) according to the first aspect of the first embodiment (enlarged view of part A in FIG. 2). [Figure 11B] 2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) according to a second aspect of the first embodiment (enlarged view of part A in FIG. 2). [Figure 11C] 2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) according to a third aspect of the first embodiment (enlarged view of part A in FIG. 2). [Figure 11D] 2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) according to a fourth aspect of the first embodiment (enlarged view of part A in FIG. 2). [Figure 11E]2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) according to a fifth aspect of the first embodiment (enlarged view of part A in FIG. 2). [Figure 11F] 2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) according to a sixth aspect of the first embodiment (enlarged view of part A in FIG. 2). [Figure 11G] 2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) according to a seventh aspect of the first embodiment (enlarged view of part A in FIG. 2). [Figure 11H] 2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) according to an eighth aspect of the first embodiment (enlarged view of part A in FIG. 2). [Figure 12A] 2 is a partially enlarged view of a resealable paper container 90 in an intermediate stage (flat state) of the first aspect of the second embodiment (enlarged view of part A in FIG. 2). [Figure 12B] 2 is a partially enlarged view of a resealable paper container 90 in a second mode of the second embodiment at an intermediate stage (flat state) (enlarged view of part A in FIG. 2). [Figure 13] FIG. 1 is a development view of a blank plate 81 used to manufacture a paper container 80 with a zipper according to the prior art. [Figure 14] FIG. 1 is a perspective view of a resealable paper container 80 of the prior art. [Figure 15] 15 is a perspective view of the resealable paper container 80 shown in FIG. 14 with the top part 871 open. DETAILED DESCRIPTION OF THE INVENTION

[0020] The present disclosure will be described below with reference to the drawings, but the present disclosure is not limited to the specifically illustrated embodiments or various specifically described structures. In each drawing, the size and proportions of the components may be changed or exaggerated for ease of understanding. Also, for clarity, unnecessary parts and repeated reference numerals may be omitted.

[0021] Furthermore, the numerical values ​​such as dimensions of each member and the names of materials described in this specification are examples of embodiments, and are not limited to these, and may be selected and used as appropriate. In this specification, terms specifying shapes or geometric conditions, such as parallel, orthogonal, and perpendicular, are intended to include not only their strict meanings but also substantially the same state.

[0022] The blank plate 10 of the resealable paper container 90 of the present disclosure is formed into a rectangular outer shape using a laminated sheet 78 having a paper base layer 782 laminated thereon and a thermoplastic resin such as polyethylene laminated as at least the innermost layer, and various folding lines provided within the blank plate 10 define the forming plates for each part required to form the resealable paper container 90.

[0023] <First aspect of the first embodiment> <Blank board> The blank plate 10 of the resealable paper container 90 of this embodiment is shown in Figures 1A and 1B. Figure 1A shows the back blank plate 10a, and Figure 1B 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 10.

[0024] Unless otherwise specified, in each component of the blank plate 10 described below, the subscript a of each symbol indicates an element of the back blank plate 10a, and the subscript b indicates an element of the front blank plate 10b. For elements with both the subscripts a and b, the symbol without a subscript may include both a and b.

[0025] The upper edge 21a of the back side, which is the bottom side of the back side blank plate 10a in FIG. 1A, becomes the top side of the resealable paper container 90. The upper edge 21b of the front side of the front blank plate 10b in FIG. 1B, which is the upper side in the drawing, becomes the upper side of the resealable paper container 90.

[0026] 1A and 1B, 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 1A and 1B are symmetrical with respect to the upper edge portions 21a and 21b, respectively, except for some components (such as the opening tab 55, which will be described later). When the inner surfaces of the back blank plate 10a and the front blank plate 10b are aligned and overlapped, the components (such as the forming plates, lines, seal portions, and zipper tape joints, which will be described later) overlap.

[0027] The back blank plate 10a and the front blank plate 10b are aligned and stacked and joined together to produce an intermediate stage paper container with a zipper (flat state) 91 as shown in Figure 2, and then an intermediate stage paper container with a zipper (boxed state) 92 as shown in Figure 3 is produced, and the steps proceed towards completing the paper container with a zipper 90; this manufacturing method will be described later.

[0028] Unless otherwise specified, the top, bottom, left, and right of the front blank plate 10b will be indicated with reference to Figure 1B. 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 1A. In the resealable paper container 90, the upper edge 21 side is the upper side, and the lower edge 26 side is the lower side.

[0029] As will be explained later, the formed resealable paper container 90 is composed of, in order from the top, a top portion 71, a body portion 72, and a bottom portion 73, 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. 4). Furthermore, 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.

[0030] As described above, the rear blank plate 10a and the front blank plate 10b are substantially symmetrical in shape vertically, so the blank plate 10 will be described with reference to the front blank plate 10b. The rear blank plate 10a and the front blank plate 10b are also made of the same material (layer structure) and are manufactured by the same method.

[0031] The front blank plate 10b of the resealable paper container 90 of this embodiment has a substantially rectangular outer shape and is made of a laminated sheet 78 having at least a base paper layer and a thermoplastic resin such as polyethylene as at least the innermost layer. Referring to Fig. 1B, the top side is the front top edge 21b, the left and right sides are the front side side edges 11b, and the bottom side is the front bottom edge 26b. The front blank plate 10b has a shape that is symmetrical with respect to a vertical line passing through the center of the front blank plate 10b in the width direction. The laminated sheet 78 will be described later.

[0032] The front blank plate 10b is provided with a front first horizontal folding line 22b, a front second horizontal folding line 23b, a front third horizontal folding line 24b, and a front fourth horizontal folding line 25b, which are arranged in the transverse direction in this order from the front upper edge 21b. These front side horizontal folding lines 22b, 23b, 24b, 25b are preferably parallel to the front side upper edge 21b and the front side lower edge 26b, respectively.

[0033] The front blank plate 10b is provided with, in order from the left side, a front first vertical bending line 12b, a front second vertical bending line 13b, a front second vertical bending line 13b and a front first vertical bending line 12b. That is, the vertical folding line closer to the side edge 11b of each front blank plate 10b is the front first vertical folding line 12b, and the vertical folding line farther from the side edge 11b of each front blank plate 10b is the front second vertical folding line 13b. It is desirable that the front longitudinal folding lines 12b, 13b are each approximately parallel to the side edge 11b of the front blank plate 10b.

[0034] Furthermore, a pair of diagonal fold lines 17b on the top side of the front surface and a pair of diagonal fold lines 18b on the bottom side of the front surface are provided on the left and right sides, and the forming plates of each part required to form the zippered paper container 90 are divided and configured.

[0035] The oblique folding line 17b on the top of the front side starts from the intersection Fb of the second vertical folding line 13b on the front side and the second horizontal folding line 23b on the front side. Furthermore, the diagonal fold line 17b on the front side connects the second top intersection Fb on the front side with the first top intersection Eb on the front side, which is the intersection of the first vertical fold line 12b and the first horizontal fold line 22b on the front side, and extends to the side edge 11b on the front side. The intersection of the side edge 11b and the diagonal fold line 17b on the front side is the end point of the diagonal fold line 17b on the front side.

[0036] The front bottom diagonal fold line 18b starts from the front second bottom intersection point Hb, which is the intersection point of the front second vertical fold line 13b and the front third horizontal fold line 24b. Furthermore, the diagonal bottom fold line 18b connects the second bottom intersection point Hb with the first bottom intersection point Gb, which is the intersection point of the first vertical fold line 12b and the fourth horizontal fold line 25b, and extends to the side edge 11b. The intersection point of the side edge 11b and the diagonal bottom fold line 18b is the end point of the diagonal bottom fold line 18b.

[0037] The diagonal folding line 17b on the top side of the front side may be located near the intersection point Fb of the second top side of the front side without contacting it.Furthermore, the diagonal folding line 18b on the bottom side of the front side may be located near the intersection point Hb of the second bottom side of the front side without contacting it.

[0038] Furthermore, the oblique fold line 17b on the top side of the front side does not contact the intersection point Eb of the first top side of the front side, and may not exist in the vicinity thereof. Alternatively, the oblique fold line 17b on the top side of the front side may not exist between the intersection point Eb of the first top side of the front side and the side edge portion 11b of the front side. Furthermore, the oblique fold line 18b on the front bottom side does not contact the front first bottom intersection point Gb and may not be present in the vicinity thereof. Alternatively, the oblique fold line 18b on the front bottom side may not be present between the front first bottom intersection point Gb and the front side edge portion 11b.

[0039] By positioning the above-mentioned oblique folding lines of each front side and each intersection point close to each other without touching, sufficient folding performance is maintained while there is no excessive concentration of folding lines at any particular location, and a decrease in the strength of the laminated sheet of the front side blank plate 10b can be prevented.

[0040] On both the left and right side edges 11b of the front blank plate 10b, front side edge seal margins 36b are formed via the front first vertical folding lines 12b.

[0041] A front bottom seal margin 37b is formed at the front lower edge 26b located below the front blank plate 10b via the front fourth horizontal folding line 25b.

[0042] Further, the front blank plate 10b is provided with forming plates for each part in succession downward from the front upper edge 21b located at the top.

[0043] Regarding the main components, a front upper overlapping plate 34b is provided below the central region of 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.

[0044] Further, side plates 41b of the top portion of the front side are connected to the outside of both the left and right sides of the front side upper overlapping plate 34b via the second vertical front folding line 13b.

[0045] Furthermore, front top protruding portions 38b are connected to the outside of both the left and right sides of the front top panel 33b via the front second vertical folding lines 13b.

[0046] Further, the front side panel 32b is connected to the outside of both the left and right sides of the front wall panel 31b via the front second vertical bending line 13b.

[0047] Further, front bottom protruding portions 43b are connected to the outside of both the left and right sides of the front bottom panel 35b via the front second vertical folding lines 13b.

[0048] Additionally, a front top protrusion margin 38b is connected to the bottom of each of the top side panels 41b via a first front horizontal bending line 22b. A front side panel 32b is connected to the bottom of each of the top protrusion margins 38b via a second front horizontal bending line 23b. A front bottom protrusion margin 43b is connected to the bottom of each of the side panels 32b via a third front horizontal bending line 24b.

[0049] The front bottom seal margins 37b are connected to the front bottom plate 35b and the lower sides of the front bottom protruding margins 43b on both the left and right sides thereof.

[0050] The front side side edge seal margin 36b is connected to the left and right outer sides of the above-mentioned side panel 41b of the front top, the front top protruding margin 38b, the front side panel 32b, and the front bottom protruding margin 43b via the front first vertical fold line 12b.

[0051] Furthermore, a rear side opening tab 55a is provided at the rear side upper edge 21a of the rear side blank sheet 10a, approximately in the center in the width direction. This rear side opening tab 55a is a rear side cutting portion 551a where the entire layer of the laminated sheet 78 of the rear side blank sheet 10a is cut away. In this embodiment, the front side opening tab 55b is not provided on the front side blank sheet 10b.

[0052] In this embodiment, the process of providing folding lines to the blank sheet 10 (creasing process) is performed after the laminated sheet 78 is completed, and then the laminated sheet is fed to a machine that manufactures the resealable paper containers 90. Alternatively, the creasing process may be performed in the machine that manufactures the resealable paper containers 90.

[0053] 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. 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.

[0054] Next, a punching process for punching the laminated sheet 78 to produce the blank plate 10 will be described. For the punching process, an appropriate method is selected from known methods such as a platen method or a rotary die method. The blank plate 10 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, and they can be done simultaneously.

[0055] Alternatively, a roll of laminated sheet 78 slit to a predetermined roll width may be fed to a machine that manufactures resealable paper containers 90, and the roll of laminated sheet 78 may be cut in the cross direction to produce blank plate 10.

[0056] The rear blank sheet 10a and the front blank sheet 10b are symmetrical and have the same shape. In other words, they are blank sheets of almost the same shape but with the layer structure reversed.

[0057] 2 is a front view showing the shape of a resealable paper container (flat state) 91 at an intermediate stage when a resealable paper container 90 is manufactured using the blank plate 10 shown in FIGS. 1A and 1B. The top is the upper edge 21b of the front blank plate 10b shown in FIG. 1B, and behind it is provided the back blank plate 10a. The back blank plate 10a cannot be seen with the naked eye, but when viewed through, it has approximately the same shape as the front blank plate 10b. However, in blank plates 10 that include some components, such as an opening tab 55, the shapes of the front blank plate 10b and the back blank plate 10a may differ.

[0058] In Figure 2, the back blank plate 10a and the front blank plate 10b are overlapping, and each component has the same positional relationship when viewed through the drawing, within the range of manufacturing variations, so the notation ``front side'' and suffix may be omitted in the explanation.

[0059] FIG. 11A shows an enlarged view of the upper part of a resealable paper container (flat state) 91 in an intermediate stage. This is an enlarged view of region A shown in FIG. 2. A back side cutout portion 551a is provided as a back side opening hook 55a on the back side upper edge portion 21a of the back side blank plate 10a. The back side cutout portion 551a does not overlap with the back side easy-open seal portion 53. The back side cutout portion 551a may or may not overlap with the back side easy-peel processed portion 54a. The back side cutout portion 551a is shown by a hidden line (broken line) because it is hidden by the front side blank plate 10b and cannot be seen.

[0060] On the upper overlapping plate 34 and the side plate 41 on the top front side, at a predetermined position where the two blank plates 10 overlap each other, an easy-open seal portion 53 as a transverse sealing means and a zipper tape joint portion 52 are provided in this order from the upper edge 21. The zipper tape joint portion 52 is the portion of the blank plate 10 where the zipper tape 61 is joined.

[0061] The opening catch 55 will be described with reference to Figure 2. When a user initially opens the top 71 of the resealable paper container 90 containing the contents, they first peel off the easy-open seal 53 on the top 71 to expose the zipper tape 61. At that time, they grip the front and back opening grip margins 57b and 57a with their fingers and open the resealable paper container in the front-to-rear direction, whereby the easy-open seal 53 is peeled off.

[0062] In this case, in the conventional paper container 80 with a zipper, the front opening grip 857b and the back opening grip 857a are in close contact with each other, and there is either no gap between them or, if there is, it is only a small gap, making it difficult for the user to insert their fingers.

[0063] Here, if the rear cutout portion 551a is present, the area of ​​the front upper overlapping plate 34b, which is the area facing the rear cutout portion 551a, is an area where only the front blank plate 10b is present. Therefore, in this area, the user's fingers can easily grasp only the front upper overlapping plate 34b. When the user pulls the front upper overlapping plate 34b toward the front and bends it downward, a gap is created between the front opening grip portion 57b of the front blank plate 10b and the back opening grip portion 57a ​​of the rear blank plate 10a. The user can insert their fingers into this gap and easily peel off the easy-open seal portion 53.

[0064] The easy-open seal portion 53, which serves as a transverse sealing means, is formed by joining the opposing front and back easy-open seal portions 53b and 53a. The joining is performed across the entire width of the resealable paper container 90, so the resealable paper container 90 remains airtight. If the easy-open seal portion 53 is approximately parallel to the upper edge portion 21, the length of the easy-open seal portion 53 can be shortened.

[0065] Furthermore, it is desirable that the zipper tape 61 be approximately parallel to the upper edge 21 . In such a configuration, it is easy to open and close the zipper tape 61 and to take out the contents. Also, the length of the zipper tape 61 can be shortened.

[0066] <Easy-to-open seal> The easy-open seal portion 53 will be described with reference to Figure 2. The easy-open seal portion 53 serves to seal the top portion 71 of the resealable paper container 90. Furthermore, when opening the top portion 71 of the resealable paper container 90 to remove the contents, it can be easily peeled off to form the removal opening 56. Therefore, the user can open the resealable paper container 90 with their fingers without using a tool such as scissors.

[0067] In order for the easy-open seal portion 53 to be easily opened by the user's fingers, the easy-open seal portion 53 must be sealed with an appropriate peel strength (upper limit). Furthermore, in order to ensure appropriate sealing of the contents, it is desirable for the easy-open seal portion 53 to have an appropriate peel strength (lower limit). The peel strength is preferably 1 N / 15 mm or more and 20 N / 15 mm or less. More preferably, it is 5 N / 15 mm or more and 15 N / 15 mm or less. In order to set the appropriate peel strength, an easy peel processed portion 54 is provided at the interface where the easy open seal portion 53 is joined, i.e., on the inner surface of the blank plate 10. The easy peel processed portion 54 sets the peel strength of the easy open seal portion 53 appropriately.

[0068] The easily peelable processed portion 54 for obtaining the easily openable seal portion 53 having the appropriate peel strength as described above is formed by applying a coating liquid of an easy-peel thermal adhesive resin or a resin called an anti-heat sealant in a pattern by means of gravure printing or flexographic printing, and then drying it.

[0069] When the easily peelable processed portion 54 is formed of an easy-peel thermal adhesive resin, the easy-peel thermal adhesive resin may be, for example, a resin composition in which a polyolefin resin such as low-density polyethylene or ethylene-vinyl acetate copolymer is appropriately mixed with additives such as polystyrene, chlorinated polypropylene, polybutene-1, inorganic or organic fillers, polyethylene wax, or fatty acid amide.

[0070] As the inorganic or organic filler, powders of silica, calcium carbonate, talc, kaolin, clay, titanium oxide, alumina, aluminum hydroxide, etc. can be used as inorganic fillers, with silica powder being particularly preferred, and powders of melamine resin, urea resin, alkyd resin, epoxy resin, acrylic resin, polystyrene, ethylene fluoride resin, silicone resin, etc. can be used as organic fillers.

[0071] The content of the above additives in the above resin composition is preferably 4% by mass or more and 40% by mass or less. If the content of the additives is less than 4% by mass, the peel strength will be too strong and a good easy-to-open seal portion 53 (easy peelability) will not be obtained. On the other hand, if the content of the additives exceeds 40% by mass, the peel strength will be too weak, which is not preferable.

[0072] The amount of the easy-peel thermal adhesive resin applied when dry is 2 g / m. 2 More than 8g / m 2 Less than 3g / m is preferred 2 More than 5g / m 2 The following is even more preferred:

[0073] When the easily peelable portion 54 is formed with a heat-sealing agent, a resin composition in which a base resin is mixed with an appropriate amount of a release agent can be used as the heat-sealing agent. Examples of the base resin that can be used include ethyl cellulose, cyclized rubber, and acrylic resin, and examples of the release agent that can be used include silicone resin, polyethylene wax, soybean lecithin, and higher fatty acid amide. When applying an anti-heat-sealing agent, the amount of application can be small, and a thickness of 0.3 μm or more and 2 μm or less is appropriate.

[0074] Since the easily peelable portion 54 weakens the bonding strength between the inner surfaces of the blank sheets 10, it is desirable not to provide it in locations where strong bonding is desired. In this embodiment, as shown in Fig. 11A, it is desirable that the easily peelable portion 54 does not extend over the area of ​​the sealing portion 36 on the side edge portion. In consideration of manufacturing variations, the sealing portion 36 on the side edge portion and the easily peelable portion 54 may be spaced apart. The distance between them may be 0.5 mm or more and 15 mm or less.

[0075] If the distance is less than 0.5 mm, there is a risk that the seal margin 36b on the side edge and the easily peelable portion 54 may overlap due to variations in manufacturing. If the gap exceeds 15 mm, the opening when the top part 71 of the resealable paper container 90 is fully opened becomes small, which may make it difficult to remove the contents.

[0076] Furthermore, the vertical length (height) of the easy peel portion 54 may be greater than the vertical length (height) of the easy-open seal portion 53 by 0.5 mm or more and 5 mm or less. This is because even if the easy peel portion 54 and / or the easy-open seal portion 53 deviate from their predetermined positions due to manufacturing errors, the easy-open seal portion 53 will not deviate from the area of ​​the easy peel portion 54. Therefore, the width of the easy-open seal portion 53 is maintained at a predetermined width, thereby stabilizing the peel strength. Note that if the size is less than 0.5 mm, there is a risk that the easy-open seal portion 53 will deviate from the area of ​​the easy peel portion 54. Furthermore, if the size exceeds 5 mm, there is a risk that the easy peel portion 54 and the zipper tape joint portion 52 will interfere with each other, hindering the joining of the zipper tape 61 and the blank plate 10, which will be described later.

[0077] In this embodiment, the easy peel processed portion 54 is provided as described above in order to appropriately set the peel strength of the easy-open seal portion 53. However, if the peel strength can be appropriately set by another method, the easy peel processed portion 54 does not necessarily need to be provided. As an example of another method, the heat sealing conditions (temperature, time, pressure, etc.) of the easy-open seal portion 53 may be appropriately set. Alternatively, the easy-open seal portion 53 may be formed in a dotted or striped shape, etc., to set the peel strength while reducing the effective heat-sealed area.

[0078] <Zipper tape> The zipper tape 61 is formed by extrusion molding a male zipper tape 61m and a female zipper tape 61f, and a male zipper tape fitting portion 63m and a female zipper tape fitting portion 63f are fitted together.

[0079] <Zipper tape joining procedure> The procedure for assembling the zippered paper container 90 will be explained later, but here, the procedure for joining the zipper tape 61 will be explained.

[0080] In this case, the zipper tape joint portion 52 is a portion to be joined with the zipper tape 61 when assembling the zippered paper container 90.

[0081] The rear blank sheet 10a and the front blank sheet 10b are overlapped, and the side edge seal margins 36 are heat-sealed together and the easy-open seal portions 53 are heat-sealed together. At this time, the zipper tape 61, which has previously been fitted between the male zipper tape 61m and the female zipper tape 61f and the male zipper tape fitting portion 63m and the female zipper tape fitting portion 63f, is inserted into this portion. At the same time, the zipper tape joint portions 52 of the two blank sheets 10 are heated and pressurized from the outer surfaces thereof. The blank sheets 10 and the zipper tapes 61 are then heat-sealed (see FIGS. 10A and 10B).

[0082] The fastener tape 61 may be joined to the blank plate 10 by other methods than the heat sealing method described above, such as by using an adhesive or adhesive tape.

[0083] By heat-sealing the zipper tape 61 in this manner, there is less misalignment of the heat seal compared to a method in which the male zipper tape 61m and the female zipper tape 61f are separately heat-sealed to the zipper tape joint portion 52, and the attachment process is simplified, so that the zipper tape 61 can be attached with high production efficiency.

[0084] <Blank plate laminate sheet> As described above, the laminated sheet 78 used for the blank plate 10 is a laminated sheet 78 in which at least a paper base layer 782 is laminated and at least a thermoplastic resin such as polyethylene is laminated as the innermost thermoplastic resin layer 783. Furthermore, as necessary, a barrier layer 785 against water vapor, oxygen, and other substances, a strength-improving layer, etc. may be provided in the intermediate layer.

[0085] Furthermore, when providing a printed layer of a pattern or the like on the resealable paper container 90 of this embodiment, it is usually printed on the outer side of the paper base layer 782, but if the paper base layer 782 is not well suited for printing, it is also possible to provide a printed layer of a pattern or the like on a synthetic resin film such as a biaxially oriented polyethylene terephthalate film, and laminate that film on one of the outer layers of the paper base layer 782.

[0086] The paper base layer 782 will now be described. The paper base layer 782 is preferably made of paper that is rigid and does not easily crack when folded along a folding line, but is not particularly limited thereto, and an appropriate material can be selected and used in consideration of water resistance (size) and other factors depending on the contents to be filled into the resealable paper container 90. As specific examples, high-quality paper, cup base paper, milk carton base paper, etc. can be suitably used, and the basis weight thereof is 80 g / m 2 More than 320g / m 2 The following ranges are appropriate:

[0087] This section explains the thermoplastic resin layer (sealant layer) used in the innermost layer, and, if necessary, the outermost and intermediate layers. Resins that can be used for the thermoplastic 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 single-site catalysts, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), ethylene-methacrylic acid random copolymer (EMAA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ionomers, polypropylene and its copolymers, and polyester-based resins. The most suitable resin can be selected from these depending on the contents to be filled and the storage and usage conditions.

[0088] Of the thermoplastic resins mentioned above, ethylene-methyl acrylate copolymer (EMA) and ethylene-methacrylic acid random copolymer (EMAA) are particularly excellent in thermal stability during processing such as extrusion coating, adhesion to various substrates, and low-temperature heat sealing properties. They also have excellent thin-film formability, making it easy to extrusion coat and laminate the outermost thermoplastic resin layer, which does not require a large thickness, at a relatively thin thickness of, for example, 6 μm or more and 10 μm or less. This reduces the proportion of plastic material used and also offers cost benefits.

[0089] The thermoplastic resin layers (sealant layers) of the innermost layer and, if necessary, the outermost layer and intermediate layer can be laminated by extrusion coating the resin on the laminate surface after subjecting the laminate surface to an easy-adhesion treatment such as anchor coating, corona treatment, or flame (flame) treatment as necessary, or by forming the thermoplastic resin into a film in advance and then laminating the film by using a known dry lamination or extrusion lamination (sandwich lamination) or the like.

[0090] When a barrier layer 785 is laminated as an intermediate layer of the laminate sheet 78, a metal foil such as aluminum foil, or a vapor-deposited film of a metal or inorganic oxide such as aluminum, silica, or alumina vapor-deposited to a thickness of 20 to 100 nm on a base film such as a biaxially oriented PET film, a biaxially oriented nylon film (ONy film), or a biaxially oriented polypropylene film (OPP film) can be used as the barrier layer 785. Alternatively, a saponified ethylene-vinyl acetate copolymer (hereinafter sometimes referred to as EVOH) film, a biaxially oriented nylon MXD6 film, a polyacrylonitrile film, or a PET film, ONy film, or OPP film provided with a coating layer of polyvinylidene chloride can be used.

[0091] Such a barrier layer 785 is usually preferably laminated on the inner surface of the paper base layer 782 in order to effectively utilize its barrier properties, but if a metal foil such as aluminum or a metal-deposited film is used for the barrier layer 785, the metallic feel can also be utilized in the design, so it can also be laminated on the outer surface of the paper base layer 782. The barrier layer 785 can be easily laminated by known methods such as dry lamination or extrusion lamination (sandwich lamination).

[0092] The layer structure of the laminated sheet 78 of the blank plate 10 of the resealable paper container 90 of this embodiment is illustrated in Figures 9A, 9B, 9C, and 9D.

[0093] FIG. 9A is a cross-sectional view of a laminated sheet 78 of the blank plate 10 made up of three layers, the layer structure of which is as follows, with " / " indicating the boundary between adjacent layers. (Outer surface) Outermost thermoplastic resin layer 781 / Paper base layer 782 / Innermost thermoplastic resin layer 783 (inner surface)

[0094] FIG. 9B is a cross-sectional view of a laminated sheet 78 of the blank plate 10 made up of two layers, and the layer structure is as follows. (Outer surface) Paper base layer 782 / Innermost thermoplastic resin layer 783 (Inner surface) This is a layer structure obtained by excluding the outermost thermoplastic resin layer 781 from the three-layer blank plate 10 shown in FIG. 9A.

[0095] Furthermore, when the blank plate 10 is required to have barrier properties (water vapor, oxygen, aroma retention, etc.), it can be provided with a barrier layer 785. Fig. 9C is a cross-sectional view of a laminated sheet 78 of the blank plate 10 consisting of five layers, and the layer structure is as follows. (Outer surface) Outermost thermoplastic resin layer 781 / Paper base layer 782 / Middle adhesive layer 784 / Barrier layer 785 / Innermost thermoplastic resin layer 783 (Inner surface)

[0096] FIG. 9D is a cross-sectional view of a laminated sheet 78 of the blank plate 10 made up of four layers, the layer structure of which is as follows: (Outer surface) Paper base layer 782 / Intermediate adhesive layer 784 / Barrier layer 785 / Innermost thermoplastic resin layer 783 (inner surface) This is a layer structure obtained by excluding the outermost thermoplastic resin layer 781 from the five-layer blank plate 10 shown in FIG. 9C.

[0097] The layers of the laminated sheets 78 are bonded together by known methods such as dry lamination, extrusion coating, adhesives, etc. Note that the layers used for bonding the layers together may not be shown because they are thin.

[0098] <Opening tab> The opening tab 55 in this embodiment is a cutout portion 551, which is cut out across all layers of the laminated sheet 78. In other words, the upper edge 21 is partially cut out from the rectangular outline of the blank plate 10. By providing the opening tab 55 at the upper edge 21 in this way, when the resealable paper container 90 is completed, the opening tab 55 is positioned on the top portion 71 in a position accessible to the user.

[0099] 1A, the opening tab 55 of this embodiment is formed by cutting out a semicircular shape at approximately the center of the width of the upper edge 21a of the back side, forming a back side cutout 551a. The back side cutout 551a does not overlap with the easy-open seal portion 53, which will be described later. Furthermore, as shown in FIG. 1B, the opening tab 55 is not provided on the front side blank plate 10b.

[0100] Since the rear cutout portion 551a has a semicircular shape, it is easy to process, and further, since it has no corners, stress is not concentrated at the corners, and inadvertent cracks are less likely to occur.

[0101] The opening catch 55 is used when initially opening the easy-open seal portion 53. Therefore, if it does not need to be conspicuous and the design of the front side is important, the opening catch 55 may be provided on the back blank plate 10a but not on the front blank plate 10b. It is desirable that the back cut-out portion 551a does not overlap the easy-open seal portion 53 described later, but it may or may not overlap the easy-peel processed portion 54. The same applies to various opening catch portions 55 described later.

[0102] The cutout portion 551 may be formed simultaneously with the punching of the blank plate 10 or after the punching.

[0103] The shape of the cutout portion 551 is not limited to the shapes described in this embodiment and other embodiments, and may be any suitable shape, such as a polygonal shape, a curved shape without corners, etc. The number of cutout portions provided on one blank plate 10 may be one or two or more, and may be selected as appropriate.

[0104] <Production of paper containers with zippers> Below is an outline of the steps from the blank plate 10 of the resealable paper container 90 to an intermediate stage resealable paper container (flat state) 91, to the intermediate stage resealable paper container (boxed state) 92, and finally to the completion of a package of the resealable paper container 90 filled with the contents.

[0105] <Creating intermediate paper containers with zippers (flat state)> When the two blank sheets 10 are overlapped, a zipper tape 61 having a male zipper tape 61m and a female zipper tape 61f fitted together is inserted into the position where the zipper tape joints 52 overlap, and the outer surfaces of the two blank sheets 10 are heated and pressurized to heat-seal the zipper tape joints 52.

[0106] Next, the inner surfaces of the easy-open seal portions 53 are heat-sealed, and the inner surfaces of the seal margins 36 on the side edges adjacent to the side edges 11 of the blank plate 10 are heat-sealed. Then, the intermediate stage resealable paper container (flat state) 91 is formed into a bag shape with an opening at the lower edge 26.

[0107] The actual manufacturing method of the resealable paper container 90 is not particularly limited, but to improve productivity, a device may be used that assembles the paper container, fills the contents, and seals each joint in-line.

[0108] In this device, a long printed laminated sheet 78 wound up in a roll can be unwound, and with the paper containers connected horizontally, processes such as processing the folding lines, inserting and heat sealing the zipper tape 61, heat sealing the side edge seal margins 36, and heat sealing the easy-open seal portions 53 can be performed. Note that the order of the steps described above may be different as long as the desired paper container 90 with a zipper can be obtained.

[0109] Here, the shape of the upper stacking plate 34 and the shape of the side plate 41 of the top portion of the resealable paper container 90 of this embodiment will be described with reference to FIG.

[0110] Top side plates 41 are connected to both the left and right sides of the upper overlapping plate 34. Here, these three forming plates are collectively referred to as the top flap 45. The top flap 45 is provided with, in order from the upper edge 21, an opening grip 57, an easy-to-open seal portion 53, and a zipper tape 61, and the first horizontal fold line 22 is located below the zipper tape 61. The back upper edge 21a of the back opening grip 57a is provided with a back cutout 551a, which is one form of the opening hook 55. The back cutout 551a is shown by a hidden line (broken line) because it is hidden by the front blank plate 10b and cannot be seen.

[0111] It is desirable that the back side cut-out portion 551a and the easy-open seal portion 53 do not overlap. If the back side cut-out portion 551a and the easy-open seal portion 53 overlap, the width of the easy-open seal portion 53 at that portion will be reduced, weakening the seal. For this reason, the shortest distance between the back side cut-out portion 551a and the easy-open seal portion 53 may be 0.5 mm or more. This reduces the risk of the two overlapping even if misalignment occurs during processing of the back side cut-out portion 551a and / or the easy-open seal portion 53.

[0112] 10A and 10B show enlarged cross-sectional views of the joining portion of the zipper tape 61, where the zipper tape 61 and the blank sheet 10 are joined in the zippered paper container (flat state) 91 at an intermediate stage. The cut portion is shown at cross-sectional position CC in Fig. 2. Here, the blank sheet 10 is exemplified by the four-layer laminated sheet 78 in Fig. 9D.

[0113] 10A, a female zipper tape 61f is joined to a front blank plate 10b as a front zipper tape 61b. The female zipper tape 61f includes a female zipper tape body 62f joined to the blank plate 10b and a female zipper tape fitting portion 63f having a recess that fits with the male zipper tape 61m. A male zipper tape 61m is joined to the back blank plate 10a as the back zipper tape 61a. The male zipper tape 61m includes a male zipper tape body 62m joined to the blank plate 10a and a male zipper tape fitting portion 63m having a protrusion that fits with the female zipper tape 61f.

[0114] 10B, a male zipper tape 61m is joined to the front blank plate 10b as the front zipper tape 61b. The male zipper tape 61m includes a male zipper tape body 62m joined to the blank plate 10b and a male zipper tape fitting portion 63m having a protrusion that fits with the female zipper tape 61f. A female zipper tape 61f is joined to the back blank plate 10a as the back zipper tape 61a. The female zipper tape 61f includes a female zipper tape body 62f joined to the blank plate 10a and a female zipper tape fitting portion 63f having a recess that fits with the male zipper tape 61m.

[0115] Whether the male zipper tape 61m or the female zipper tape 61f is joined to the front blank plate 10b is selected appropriately depending on the required performance of the zippered paper container 90 and the specifications of the manufacturing equipment for the zippered paper container 90.

[0116] <Creating a paper container with a zipper (in an erected state) at the intermediate stage> A mandrel is inserted through the opening at the bottom 73 of this intermediate stage zippered paper container (flat state) 91, leaving the upper overlapping plate 34, and the top plate 33 below it is spread out front and back along the first horizontal fold line 22, causing the upper overlapping plate 34 to stand upward.

[0117] 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 outer side of the body portion 72.

[0118] Below the upper overlapping plate 34, a top portion 71 formed by the top panel 33 and a flat body portion 72 are formed, and the bottom portion 73 opens in a generally rectangular shape, forming an intermediate stage resealable paper container (standing state) 92. At this stage, the upper overlapping plate 34 stands upright as shown in Figure 3.

[0119] 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 since the resealable 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.

[0120] <Forming and filling of paper containers with zippers> Next, the upper overlapping plate 34 standing upward is bent to the back side (towards the back top panel 33a) and laid down, and the top protrusions 74 protruding on both the left and right sides are bent towards the side panels 32 and joined to the body 72. At this time, the bent portion 76 of the top-side protrusion 74 is bent. At this time, in order to ensure that the bent portion 76 is bent, an auxiliary member may be brought into contact with the vicinity of (including abutment against) the bent portion 76 from the inner side and / or outer side of the top portion 71.

[0121] The top protrusion 74 may be joined to the body 72 using an adhesive (hot melt, etc.), adhesive tape, or mechanical joining (engaging, using a joining tool). Also, if a thermoplastic resin layer (sealant layer) is provided on the outermost layer of the blank plate 10, the thermoplastic resin layer (sealant layer) may be heat-sealed. A similar method is used for joining the bottom protrusion, which will be described later.

[0122] The tip of the top-side protrusion 74 may be joined to the body 72 of the resealable paper container 90. In addition, a portion of the top-side protrusion 74 other than the tip may be joined to the body 72 of the resealable paper container 90. In that case, the tip of the top-side protrusion 74 does not need to be joined to the body 72 of the resealable paper container 90.

[0123] The bottom 73 of the intermediate stage resealable paper container (standing state) 92 formed as described above is turned upward, and the contents are filled through the open bottom 73. Next, the bottom 73 is folded and the seal margins 37 on the bottom side are heat sealed using a palm-to-palm seal method.

[0124] Then, the joined bottom side seal margin 37 is folded and laid on the back side (towards the back side bottom panel 35a), and the protruding bottom side portions on both the left and right sides are folded and joined towards the bottom panel 35, thereby completing the packaging of the approximately rectangular shaped resealable paper container 90.

[0125] Fig. 4 is a perspective view showing a resealable paper container 90 of this embodiment. Fig. 5 is a side view of the resealable paper container 90 shown in Fig. 4. Fig. 6 is a plan view of the resealable paper container 90 shown in Fig. 4.

[0126] The resealable paper container 90 shown in FIG. 4 has an outer shape formed into a substantially rectangular parallelepiped, and has a ridge portion 72d on its body portion 72. Since the resealable paper container 90 is made of a flexible laminated sheet 78 mainly made of paper, it does not have a perfect rectangular parallelepiped shape, and is therefore made to have an approximately rectangular parallelepiped shape.

[0127] <Opening operation to remove contents from a paper container with a zipper> The procedure for opening the top part 71 of the completed package of the resealable paper container 90 containing the contents in order to remove the contents will be described. First, the top protrusion 74 joined to the body 72 is peeled off. Then, as the top protrusion 74 is lifted upward, the top side plate 41 stands up, and the upper overlapping plate 34 also stands up. The top side plate 41 and the upper overlapping plate 34 are then approximately flush with each other. The top side plate 41 and the top side plate 41 together are called the top flap 45, as previously explained.

[0128] To initially open the zippered paper container 90, the user grasps the opening gripping areas 57 on both the front and back sides with their fingers and spreads the front opening gripping area 57a and the back opening gripping area 57a outward (front-to-back), thereby peeling off the easy-to-open seal area 53.

[0129] Here, when a user grasps the front and back opening grip margins 57, a gap is created between the front and back opening grip margins 57, and the user must insert their fingers into it. In this embodiment, a back cutout 551a is present. The inner side of the front opening grip margin 57b is exposed at the position opposite the back cutout 551a, so the user can grasp the front opening grip margin 57 with their fingers. When the user deforms the front opening grip margin 57b toward the front (front) and downward, a gap is created between the front and back opening grip margins 57. By inserting their fingers into the gap, the user grasps each opening grip margin 57 with both hands and spreads them outward (front-to-back), thereby peeling off the easy-open seal portion 53 and completing the initial opening of the resealable paper container 90.

[0130] Next, after the initial opening of the resealable paper container 90, the zipper tape 61 is opened. Here, the area between the front side upper edge 21b and the front side zipper tape 61b is defined as the front side opening after initial opening gripping margin 571b. Also, the area between the back side upper edge 21a and the back side zipper tape 61b is defined as the back side opening after initial opening gripping margin 571a. The opening after initial opening gripping margin 571 includes the opening gripping margin 57, the easy-open seal portion 53, and the area between the zipper tape 61 and the easy-open seal portion 53.

[0131] The user grasps the opening gripping areas 571 on the front and back sides after initial opening with their fingers and spreads them outward (front and back) of the resealable paper container 90. By doing so, the zipper tapes 61 provided on the upper overlapping plate 34 and the side plates 41 on the top of both left and right sides are released.

[0132] During this opening operation of the zipper tape 61, the ends of the zipper tape 61 near the left and right side edges 11 of the blank sheet 10 are opened over almost the entire width up to the side edge seal margins 36. The side edge seal margins 36 are not peeled off. As described above, the male zipper tape 61m and the female zipper tape 61f of the zipper tape 61 are separated to form the removal opening 56. Fig. 8 shows a paper container 94 with a zipper, the top part 71 of which is open.

[0133] The operation of peeling the easy-open seal portion 53 and the operation of unzipping the zipper tape 61 may be performed in a series of operations. Alternatively, the operation of unzipping the zipper tape 61 may be performed after the operation of peeling the easy-open seal portion 53 is completed.

[0134] <Second Aspect of the First Embodiment> 11B shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening tab 55. The opening tab 55 is a front cutout 551b provided on the front upper edge 21b of the front blank plate 10b. The front cutout 551b has the same semicircular shape as the back cutout 551a of the first embodiment of this invention. The back blank plate 10a does not have a back opening tab 55a.

[0135] In this embodiment, the opening catch 55 is provided on the front blank plate 10b, so that it can be easily seen even after the resealable paper container 90 is assembled. Therefore, the location of the opening catch 55 is clearly indicated.

[0136] In the following description of other embodiments, the rear opening hook 55a may be provided only on the rear blank plate 10a, and the front blank plate 10b may not be provided with the front opening hook 55b. In this case, an embodiment is also possible in which the front opening hook 55b has the same shape as the rear opening hook 55a, and the rear blank plate 10a does not have the rear opening hook 55a, and the operation is the same as this embodiment.

[0137] The shape of the blank plate 10 other than the opening tab 55 is the same as that of the first aspect of this embodiment. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of this embodiment.

[0138] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0139] In the resealable paper container 93 with the top protrusion 74 raised, the inner side of the back side opening grip tab 57a is exposed at the position facing the front side cutout 551b. In this position, the front and back sides of the back side opening grip tab 57a are exposed, allowing the user to easily grasp it with their fingers. When the user deforms the back side opening grip tab 57a downward toward the back (rear), a gap is created between the front and back opening grip tabs 57. By inserting their fingers into this gap, the user can grasp each opening grip tab 57 with both hands and spread them outward (front-to-back), thereby peeling off the easy-open seal portion 53 and completing the initial opening of the resealable paper container 90.

[0140] <Third aspect of the first embodiment> 11C shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening hook 55. The opening hook 55 is a rear cutout 551a provided on the rear upper edge 21a of the rear blank plate 10a. Note that the rear cutout 551a is shown by a hidden line (broken line) because it is hidden by the front blank plate 10b and cannot be seen. Note that the front blank plate 10b does not have a front opening hook 55b.

[0141] The back side cutout portion 551a is located approximately in the center of the width of the resealable paper container 90 and has a rectangular shape that is long in the horizontal direction. The horizontal length is 20 mm or more and does not exceed the two back side second vertical fold lines 13a. Therefore, it is large enough for a user to insert their fingers, and because the back side cutout portion 551a is not too large, the strength of the top flap 45 is easily maintained.

[0142] Furthermore, the two corners of rectangular back side cutout portion 551a on the side of easy-open seal portion 53 may be rounded, which prevents stress from concentrating on the corners and makes it less likely for unintended cracks to occur.

[0143] The shape of the blank plate 10 other than the opening tab 55 is the same as that of the first aspect of this embodiment. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of this embodiment.

[0144] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0145] In the resealable paper container 93 with the top protrusion 74 raised, the inner side of the front-side opening grip margin 57b is exposed at the position facing the back-side cutout 551a. In this position, the front and back sides of the front-side opening grip margin 57b are exposed, allowing the user to easily grasp it with their fingers. When the user deforms the front-side opening grip margin 57b toward the front (front) and downward, a gap is created between the front and back opening grip margins 57. By inserting their fingers into this gap, the user can grasp each opening grip margin 57 with both hands and spread them outward (front-to-back), thereby peeling off the easy-open seal 53 and completing the initial opening of the resealable paper container 90.

[0146] <Fourth aspect of the first embodiment> 11D shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening hook 55. The opening hook 55 is a rear cutout 551a provided on the rear upper edge 21a of the rear blank plate 10a. Note that the rear cutout 551a is shown by a hidden line (broken line) because it is hidden by the front blank plate 10b and cannot be seen. Note that the front blank plate 10b does not have a front opening hook 55b.

[0147] The back side cutout portion 551b is located approximately in the center of the width direction of the resealable paper container 90, and its shape is an arc with a larger radius than the semicircular shape of the first aspect of this embodiment. In this aspect, the area is larger than the semicircular back side cutout portion 551a of the first aspect of this embodiment, making it easier for the user to grasp the front side opening grip portion 57b with their fingers. Furthermore, because the back side cutout portion 551a has no corners, stress does not concentrate on the corners, making it less likely to cause unintended cracks.

[0148] The shape of the blank plate 10 other than the opening tab 55 is the same as that of the first aspect of this embodiment. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of this embodiment.

[0149] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0150] In the resealable paper container 93 with the top protrusion 74 raised, the inner side of the back side opening grip tab 57a is exposed at the position facing the front side cutout 551b. In this position, the front and back sides of the back side opening grip tab 57 are exposed, allowing the user to easily grasp it with their fingers. When the user deforms the back side opening grip tab 57a toward the back (rear) and downward, a gap is created between the front and back opening grip tabs 57. By inserting their fingers into this gap, the user can grasp each opening grip tab 57 with both hands and spread them outward (front-to-back), thereby peeling off the easy-open seal portion 53 and completing the initial opening of the resealable paper container 90.

[0151] <Fifth aspect of the first embodiment> 11E shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening hook 55. The opening hook 55 is a rear cutout 551a provided on the rear upper edge 21a of the rear blank plate 10a. Note that the rear cutout 551a is shown by a hidden line (broken line) because it is hidden by the front blank plate 10b and cannot be seen. Note that the front blank plate 10b does not have a front opening hook 55b.

[0152] The back side cutout portion 551b is located approximately in the center of the width of the resealable paper container 90 and has a rectangular shape that is long in the horizontal direction. Both sides of the cutout portion 551b extend beyond the back side second vertical fold line 13a but do not reach the back side first vertical fold line 12a. Therefore, when a user peels the easy-open seal portion 53, the peeling is performed inward from the side edge seal margin 36, which requires less force and allows for smooth peeling.

[0153] The shape is the same as that of the first aspect of the first embodiment except for the opening tab 55. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of the first embodiment.

[0154] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0155] In the resealable paper container 93 with the top protrusion 74 raised, the inner side of the front opening grip margin 57b is exposed at the position facing the back cutout 551a. In this position, the front and back sides of the front opening grip margin 57b are exposed, allowing the user to easily grasp it with their fingers. Then, when the producer deforms the front opening grip margin 57b toward the front (front) and downward, a gap is created between the front and back opening grip margins 57. By inserting fingers into this gap, the producer can grasp each opening grip margin 57 with both hands and spread them outward (front-to-back), thereby peeling off the easy-open seal 53 and completing the initial opening of the resealable paper container 90.

[0156] <Sixth aspect of the first embodiment> 11F shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the previous process. The blank plate 10 of this embodiment is provided with an opening hook 55. The opening hook 55 is a rear side cutout 551a provided at the rear side upper edge 21a of the rear side blank plate 10a, and a front side cutout 551b provided at the front side upper edge 21b of the front side blank plate 10b. Note that the rear side cutout 551a is shown by a hidden line (dashed line) because it is hidden by the front side blank plate 10b and cannot be seen.

[0157] The back side cutout portion 551a is located to the right of the widthwise center of the resealable paper container 90 when viewed from the front side of the resealable paper container 90, and is cut out in a semicircular shape at the back side upper edge portion 21a. The shape of the back side cutout portion 551a is the same as the back side cutout portion 551a in the first aspect of this embodiment. Furthermore, the front side cutout portion 551b is located to the left of the widthwise center of the resealable paper container 90 when viewed from the front side of the resealable paper container 90, and is cut out in a semicircular shape at the front side upper edge 21b. The shape of the front side cutout portion 551b is the same as the back side cutout portion 551a of this embodiment.

[0158] In this embodiment, the area of ​​the rear side cutout 551a and the area of ​​the front side cutout 551b do not overlap. The left-right positional relationship between the rear side cutout 551a and the front side cutout 551b may be reversed. The front side cutout 551b and the rear side cutout 551a do not have to be located on both the left and right sides, but may be located on either one side. Multiple cutouts 551 may be provided on the upper edge 21 of one blank plate 10.

[0159] In this embodiment, the rear cut portion 551a has a semicircular shape, which makes it easy to process. Furthermore, the rear cut portion 551a has no corners, so stress does not concentrate on the corners, making it less likely to develop unintended cracks. By doing so, the opening gripping portions 57 on both sides can be gripped at the same time, so that the easy-to-open seal portion 53 can be quickly peeled off.

[0160] The shape of the blank plate 10 other than the opening tab 55 is the same as that of the first aspect of this embodiment. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of this embodiment.

[0161] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0162] In the resealable paper container 93 with the top protrusion 74 raised, the inner side of the back side opening grip margin 57a ​​is exposed at the position facing the front side cutout 551b. At this position, the front and back sides of the back side opening grip margin 57a ​​are exposed, so the user can easily grasp it with their fingers. Furthermore, the inner side of the front side opening grip margin 57b is exposed at the position facing the back side cutout 551a. At this position, the front and back sides of the front side opening grip margin 57b are exposed, so the user can easily grasp it with their fingers. When the user simultaneously grasps the back side opening grip margin 57a ​​and the front side opening grip margin 57b and spreads them outward (front-to-back) with both hands, the easy-open seal 53 is peeled off, completing the initial opening of the resealable paper container 90.

[0163] <Seventh aspect of the first embodiment> 11G shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening hook 55. The opening hook 55 is a rear side cutout 551a provided at the rear side upper edge 21a of the rear side blank plate 10a, and a front side cutout 551b provided at the front side upper edge 21b of the front side blank plate 10b. Note that the rear side cutout 551a is shown by a hidden line (dashed line) because it is hidden by the front side blank plate 10b and cannot be seen.

[0164] The back side cutout portion 551a is located to the right of the widthwise center of the resealable paper container 90 when viewed from the front side of the resealable paper container 90, and is cut out in a rectangular shape at the back side upper edge portion 21a. The shape of the back side cutout portion 551a is the same as the back side cutout portion 551a in the third aspect of this embodiment. Furthermore, the front side cutout portion 551b is located to the left of the widthwise center of the resealable paper container 90 when viewed from the front side of the resealable paper container 90, and is cut out in a rectangular shape at the front side upper edge 21b. The shape of the front side cutout portion 551b is the same as the back side cutout portion 551a of this embodiment.

[0165] The rear cutout portion 551a and the front cutout portion 551b each have a horizontal length of 20 mm or more, and do not exceed the rear second vertical fold line 13. This provides a sufficient size for the user to insert their fingers, and because cutout portion 551 is not too large, the strength of top flap 45 is easily maintained. By doing so, the opening gripping portions 57 on both sides can be gripped at the same time, so that the easy-to-open seal portion 53 can be quickly peeled off.

[0166] The shape of the blank plate 10 other than the opening tab 55 is the same as that of the first aspect of the first embodiment. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of the first embodiment.

[0167] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0168] In the resealable paper container 93 with the top protrusion 74 raised, the inner side of the back side opening grip margin 57a ​​is exposed at the position facing the front side cutout 551b. At this position, the front and back sides of the back side opening grip margin 57a ​​are exposed, so the user can easily grasp it with their fingers. Furthermore, the inner side of the front side opening grip margin 57b is exposed at the position facing the back side cutout 551a. At this position, the front and back sides of the front side opening grip margin 57b are exposed, so the user can easily grasp it with their fingers. When the user simultaneously grasps the back side opening grip margin 57a ​​and the front side opening grip margin 57b and spreads them outward (front-to-back) with both hands, the easy-open seal 53 is peeled off, completing the initial opening of the resealable paper container 90.

[0169] Eighth aspect of the first embodiment 11H shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening hook 55. The opening hook 55 is a rear side cutout 551a provided at the rear side upper edge 21a of the rear side blank plate 10a, and a front side cutout 551b provided at the front side upper edge 21b of the front side blank plate 10b. Note that a portion of the rear side cutout 551a is hidden by the front side blank plate 10b and cannot be seen, so it is represented by a hidden line (dashed line).

[0170] The back side cutout portion 551a is located to the right of the widthwise center of the resealable paper container 90 when viewed from the front side of the resealable paper container 90, and is cut out in a rectangular shape at the back side upper edge portion 21a. The shape of the back side cutout portion 551a is the same as the back side cutout portion 551a in the third aspect of this embodiment. Furthermore, the front side cutout portion 551b is located to the left of the widthwise center of the resealable paper container 90 when viewed from the front side of the resealable paper container 90, and is cut out in a rectangular shape at the back side upper edge 21a. The shape of the front side cutout portion 551b is the same as the back side cutout portion 551a of this embodiment.

[0171] The rear cutout portion 551a and the front cutout portion 551b each have a horizontal length of 20 mm or more, and do not exceed the second vertical folding line 13. This provides a sufficient size for the user to insert their fingers, and because the rear cutout portion 551a is not too large, the strength of the top flap 45 is easily maintained.

[0172] The rear cut-out portion 551a and the front cut-out portion 551b overlap partially, but not completely. In this way, the upper overlapping plate 34 is cut out over the entire layer where the rear cut-out portion 551a and the front cut-out portion 551b overlap, so that a clear cut-out portion 551 can be seen at the upper edge portion 21. Therefore, the opening hook 55 is clearly visible. In addition, since the opening gripping portions 57 on both the front and back sides can be gripped simultaneously, the easy-to-open seal portion 53 can be quickly peeled off.

[0173] The shape of the blank plate 10 other than the opening tab 55 is the same as that of the first aspect of the first embodiment. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of the first embodiment.

[0174] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0175] In the resealable paper container 93 with the top protrusion 74 raised, the inner side of the back side opening grip margin 57a ​​is exposed at the position facing the front side cutout 551b. At this position, the front and back sides of the back side opening grip margin 57a ​​are exposed, so the user can easily grasp it with their fingers. Furthermore, the inner side of the front side opening grip margin 57b is exposed at the position facing the back side cutout 551a. At this position, the front and back sides of the front side opening grip margin 57b are exposed, so the user can easily grasp it with their fingers. When the user simultaneously grasps the back side opening grip margin 57a ​​and the front side opening grip margin 57b and spreads them outward (front-to-back) with both hands, the easy-open seal 53 is peeled off, completing the initial opening of the resealable paper container 90.

[0176] <First aspect of the second embodiment> 12A shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening hook 55. The opening hook 55 is a rear cutout 552a provided in the rear upper edge 21a of the rear blank plate 10a. Note that the rear cutout 552a is shown by a hidden line (broken line) because it is hidden by the front blank plate 10b and cannot be seen. The rear cutout 552a cuts through all layers of the laminated sheet 78 of the rear blank plate 10a.

[0177] The back side cutout 552a is located approximately in the center in the width direction of the resealable paper container 90, and is a vertical straight cutout line, with at least two of them arranged parallel to each other in the horizontal direction of the resealable paper container 90. The front side blank plate 10b does not have a front side opening notch 55b. The starting end of the rear cutout 552a is the rear upper edge 21a, and the ending end is near the easy-open seal portion 53, but it is preferable that they do not come into contact.

[0178] The shape of the blank plate 10 other than the opening tab 55 is the same as that of the first aspect of this embodiment. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of the first embodiment.

[0179] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0180] With the top side protrusion 74 raised, the user presses the back side upper edge 21a between the two back side notches 552a downward toward the back side (rear side). Then, the line connecting the ends of the two back side notches 552a forms a folding line, and the back side opening grip margins 57a in the area surrounded by the folding line, the two back side notches 552a, and the back side upper edge 21a are bent outward. This creates a gap between the opening grip margins 57 on both sides. The user inserts their fingers into the gap, grasps each opening grip margin 57 with both hands, and spreads them outward (front-to-back), thereby peeling off the easy-open seal 53 and completing the initial opening of the resealable paper container 90. The rear cutout 552a does not have to be located at approximately the center of the width of the resealable paper container 90, and may be located to the left or right.

[0181] The distance between the two rear cutouts 552a is preferably 10 mm or more, which makes it easier for the user to place their fingers in. The distance between the two rear cutouts 552a is preferably 60 mm or less, which makes it easier to fold the folding line between the end portions of the two rear cutouts 552a.

[0182] In this embodiment, the cutout 552 is described as being linear in shape, but the cutout 552 is not limited to being linear, and may be an arc, a curve, a line with corners, or the like, as appropriate.

[0183] <Second aspect of second embodiment> 12B shows a resealable paper container (flat state) 91 in an intermediate stage of this embodiment, with the blank plate 10 of this embodiment being prepared in the preceding process. The blank plate 10 of this embodiment is provided with an opening hook 55. The opening hook 55 consists of a rear cutout 552a provided at the rear upper edge 21a of the rear blank plate 10a and a front cutout 552b provided at the front upper edge 21b of the front blank plate 10b. Note that the rear cutout 552a is shown by a hidden line (broken line) because it is hidden by the front blank plate 10b and cannot be seen. The cutout 552 extends through all layers of the laminated sheet 78 of the blank plate 10.

[0184] The back side cutout 552a is located to the right in the width direction of the resealable paper container 90 when viewed from the front side of the resealable paper container 90. Its shape is a straight cutout line in the vertical direction, and at least two of them are arranged in parallel in the horizontal direction of the resealable paper container 90. The shape of the back side cutout 552a is the same as the back side cutout 552a in the first aspect of this embodiment. Furthermore, the front cutout 552b is located to the left in the width direction of the resealable paper container 90 when viewed from the front side of the resealable paper container 90. The shape of the front cutout 552b is the same as the back cutout 552a of this embodiment.

[0185] The shape of the blank plate 10 other than the opening tab 55 is the same as that of the first aspect of this embodiment. The layer structure of the laminated sheet 78 of the blank plate 10, the method for producing the resealable paper container 90, and the method for filling the resealable paper container 90 are the same as those of the first aspect of the first embodiment.

[0186] The blank plates 10 of this embodiment are assembled to produce a resealable paper container 90. Then, the resealable paper container 90 filled with contents is produced. After that, when the resealable paper container 90 filled with contents is initially opened, it becomes a resealable paper container 93 in a state where the protruding portion 74 on the top side is raised.

[0187] With the top side protrusion 74 raised, the user presses down the back side upper edge 21a between the two back side cutouts 552a toward the back (rear side) of the resealable paper container 93. This causes the back side opening grip margin 57a ​​in the area surrounded by the above-mentioned folding line, the two back side cutouts 552a, and the back side upper edge 21a to bend outward, with the line connecting the ends of the two back side cutouts 552a as the folding line. The user also presses down the front (top) edge 21b between the two front cutouts 552b toward the front, which causes the front opening grip margin 57b in the area surrounded by the folding line, the two front cutouts 552b, and the front top edge 21b to bend outward along the line connecting the ends of the two front cutouts 552b.

[0188] A gap is then created between the front and back opening grip margins 57. The user inserts his or her fingers into the gap, grasps each opening grip margin 57 with both hands, and spreads them outward (front-to-back), thereby peeling off the easy-open seal portion 53 and completing the initial opening of the resealable paper container 90.

[0189] The notches 552 on both the front and back sides do not have to be positioned on both the left and right sides of the width direction of the resealable paper container 90, and may be positioned closer to either the left or right side.

[0190] The distance between each of the two front and back cutouts 552 is preferably 10 mm or more, which makes it easier for the user to place their fingers on the cutout. The distance between each of the two back cutouts 552a is preferably 60 mm or less, which makes it easier to fold the folding line between the end portions of each of the two front and back cutouts 552.

[0191] The area between the two front cutouts 552b and the area between the two back cutouts 552a may overlap as shown in Fig. 12B, or they may not overlap. There may be three or more cut portions 552 on each of the front and back sides, and an appropriate two of these cut portions 552 may be used.

[0192] In the embodiments of the resealable paper container 90 described so far, either the cutout portion 551 or the slit portion 552 is provided. However, the resealable paper container 90 may be provided with both the cutout portion 551 and the slit portion 552. The front blank plate 10b may be provided with both the front cutout portion 551b and the front slit portion 552b. Alternatively, the front blank plate 10b may be provided with the front cutout portion 551b and the back slit portion 552a, and the front blank plate 10a may be provided with one or more front opening catches 55b.

[0193] A rear side cutout 551a is provided on the rear side blank plate 10a, and two parallel front side notches 552b may be provided on the front side blank plate 10b to sandwich the area opposite the rear side cutout 551b. In this case, when a user initially opens the resealable paper container 90, the area of ​​the rear side cutout 551a can be used to easily grasp both the front and back surfaces of the front side opening grip 57b with their fingers. This area is between the two parallel front side notches 552a, and when a user grasps this area and deforms it toward the front side (front), this area bends easily. This increases the gap between the rear side opening grip 57a and the front side opening grip 57b, making it easier to peel off the easy-open seal portion 53.

[0194] In the above description, the opening catch 55 provided on the front blank plate 10b and the back blank plate 10a is not fixed, but is an example of a combination of one blank plate 10 and the other blank plate 10, and the front and back may be reversed. [Example]

[0195] The embodiments of the present disclosure will be described in more detail below with reference to examples.

[0196] Example 1 In Example 1, a resealable paper container 90 shown in Fig. 4 was produced using the blank plate 10 of Fig. 1A and Fig. 1B corresponding to the first aspect of the first embodiment. A back-side cutout portion 551a was provided on the back-side blank plate 10a as the back-side opening hook portion 55a.

[0197] 1A and 1B were prepared, and the inner surfaces of the blank plates 10 were aligned and overlapped, and the side edge seal portions 36 of the opposing sides were heat-sealed, and the easy-open seal portion 53 was also heat-sealed, as shown in FIG. 2. The zipper tape 61 was also heat-sealed. In this way, an intermediate stage resealable paper container (flat state) 91 was produced, with the bottom seal portion 37 unsealed.

[0198] The laminated sheet 78 of the blank plate 10 had the following configuration. A cross-sectional view of the laminated sheet 78 is shown in Fig. 9D, but the printed layer such as a picture and the easily peelable portion 54 are not shown. Note that " / " indicates the boundary between adjacent layers. (Outer side) Printed layer (gravure printing on the outer surface of the paper base layer 782) / Paper base layer 782 (base paper for liquid paper containers 150g / m 2 Nippon Paper Industries) / Intermediate adhesive layer 784 (EMAA 20μm Mitsui Dow Polychemicals N0908N) / Barrier layer 785 (silica vapor-deposited PET 12 μm Dai Nippon Printing IB-PET-UBP) / The innermost thermoplastic resin layer is 783 (LDPE 40 μm Japanese polyethylene LC520) (Inside)

[0199] A method for manufacturing the laminated sheet 78 will now be described. First, a roll of paper substrate layer 782 was unwound, and predetermined patterns and characters were gravure printed at predetermined positions, and the layer was then wound up into a roll again.

[0200] In the next step, the rolled paper substrate layer 782 was unwound, and a barrier layer 785 (silica-deposited PET 12 μm) was laminated on the inner surface of the paper substrate layer 782 by extrusion lamination (sandwich lamination), with a molten intermediate adhesive layer 784 (EMAA 20 μm) interposed therebetween.

[0201] Next, an innermost thermoplastic resin layer 783 (LDPE 40 μm) was formed by extrusion lamination on the opposite side (inner side) of the paper substrate layer 782 of the barrier layer 785, and the product was wound up again into a roll.

[0202] In addition, in order to improve the bonding strength between the bonding layers, anchor coating treatment, corona treatment, flame treatment, etc. may be performed as needed. Alternatively, ozone treatment may be performed on the molten resin.

[0203] Next, the rolled laminated sheet 78 was unwound, and the easily peelable portion 54 was provided by gravure printing at a predetermined position on the inner surface of the innermost thermoplastic resin layer 783, and the laminated sheet was then wound up again into a roll. In this embodiment, a pattern or the like is first printed on the single-layer paper base layer 782. However, after the laminated sheet 78 is completed, a pattern or the like may be printed on the front side of the laminated sheet 78.

[0204] Next, the roll-shaped laminated sheet 78 is unwound and subjected to processes such as creasing and punching, thereby completing the blank plate 10.

[0205] The zipper tape 61 that is heat-sealed and attached to the inner surface of the upper overlapping plate 34 and the side plate 41 of the top part of the zipper-equipped paper container 90 has a two-layer structure in which the zipper tape body 62 that is heat-sealed is made up of both the male zipper tape 61m and the female zipper tape 61f. The zipper tape 61 has a resin layer made of LLDPE on the side that is heat-sealed to the zippered paper container 90, and a resin layer on the opposite side made of MDPE. The male zipper tape fitting portion 63m and the female zipper tape fitting portion 63f are both made of LLDPE, and the zipper tape body portions 62 both have a width of 7 mm.

[0206] The dimensions of the back blank plate 10a and the front blank plate 10b are rectangular, 250 mm in length and 189 mm in width, and a 7 mm wide side edge seal margin 36 is provided on the side edges 11 on both sides as a seal margin at the peripheral edge. In addition, a bottom seal margin 37 having a width of 10 mm was provided on each of the lower edges 26 of the lower side.

[0207] Further, an opening grip 57 having a vertical length (short side direction) of 5 mm was provided on the upper edge 21 of the upper overlapping plate 34 and the top side plate 41, and an easy-open seal portion 53 having a vertical length (short side direction) of 3 mm was provided below the opening grip 57. The easy-open seal portion 53 was sealed in the area of ​​the easy-peel processed portion 54, except for the side edge seal portion 36 and the vicinity of the side edge seal portion 36.

[0208] The rear side opening grip portion 57a ​​was provided with a semicircular rear side cutout portion 551a with a radius of 4 mm at approximately the center in the width direction of the rear side upper edge 21a. The front side opening grip portion 57b was not provided with the front side opening catch portion 55b.

[0209] The blank plate 10 is provided with an upper overlapping plate 34, a first horizontal folding line 22, a top panel 33, a second horizontal folding line 23, a wall panel 31, a third horizontal folding line 24, and a bottom panel 35 in this order from the upper edge 21 downward.

[0210] Furthermore, top side panels 41 are provided on the outer sides of both sides of the upper overlapping panel 34 via second vertical bending lines 13. Furthermore, top side protrusion margins 38 are provided on the outer sides of both sides of the top panel 33 via second vertical bending lines 13. Furthermore, side panels 32 are provided on the outer sides of both sides of the wall panel 31 via second vertical bending lines 13. Furthermore, bottom side protrusion margins 43 are provided on the outer sides of both sides of the bottom panel 35 via second vertical bending lines 13.

[0211] Additionally, below the easy-open seal portion 53, a zipper tape 61 was heat-sealed across the top portion 71 on the inner surfaces of the upper overlapping plate 34 and the top side plate 41. The distance between the upper edge 21 and the zipper tape 61 was 18 mm. The distance between the zipper tape 61 and the first horizontal fold line 22 was 20 mm. As described above, an intermediate stage zippered paper container (flat state) 91 was produced (see FIG. 2).

[0212] Next, a mandrel was inserted into this intermediate stage zippered paper container (flat state) 91 through the opening of the unsealed bottom seal 37, leaving the upper overlapping plate 34, and the top plate 33 below it was spread out front and back along the first horizontal fold line 22, and the upper overlapping plate 34 was then raised upward. Below the upper stacking plate 34, there is a top portion 71 made of the top plate 33, followed by a body portion 72 having a substantially rectangular horizontal cross section (a plane substantially parallel to the bottom surface), and a bottom portion 73 having a substantially rectangular opening, forming an intermediate stage resealable paper container (standing state) 92 (see Figure 3).

[0213] Then, the overlapped upper overlapping plate 34 was bent toward the rear top panel 33a. After that, the top protrusions 74 connected to both the left and right sides of the top part 71 were joined to the body part 72. Hot melt adhesive was used for the joining. In addition, the tip of the top protrusion 74 is bent toward the inside of the zippered paper container 90 (downward before the top protrusion 74 is bent) to make it easier to join the top protrusion 74 and the body 72.

[0214] When joining the top-side protrusion 74 to the body 72, the angle formed between the top 71 and the top-side protrusion 74 via the bent portion 76 of the top-side protrusion 74 is set to be approximately a right angle.

[0215] The dimensions of the completed paper container, which was approximately rectangular parallelepiped, were 95 mm in width, 120 mm in height, and 80 mm in depth. In the manner described above, the resealable paper container 90 of this example was produced.

[0216] <Example 2> In this example, a resealable paper container 90 was produced using a blank plate 10 in which a front side cutout 551b was provided on a front side blank plate 10b as shown in FIG. 11B, which corresponds to the second aspect of the first embodiment. A back side opening hook 55a was not provided on a back side blank plate 10a. The shape of the front side cutout 551b was the same as the back side cutout 551a in Example 1. Other aspects, such as the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the method of producing the resealable paper container 90, were the same as those in Example 1.

[0217] Example 3 In this example, a resealable paper container 90 was produced using a blank plate 10 having a back-side cutout 551a provided in the approximate center of the back-side upper edge 21a of the back-side blank plate 10a, as shown in FIG. 11C, which corresponds to the third aspect of the first embodiment. The back-side cutout 551a measured 4 mm in length and 30 mm in width. The front-side blank plate 10b did not have a front-side opening tab 55b. The rest of the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the production method of the resealable paper container 90 were the same as in Example 1.

[0218] Example 4 In this example, a resealable paper container 90 was produced using a blank plate 10 having a back side cutout 551a provided in the approximate center of the back side upper edge 21a of the back side blank plate 10a, as shown in FIG. 11D, which corresponds to the fourth aspect of the first embodiment. The back side cutout 551a and the easy-open seal portion 53 were spaced 1 mm apart. The back side cutout 551a was an arc with a radius of 20 mm. The front side blank plate 10b did not have a front side opening tab 55b. The rest of the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the production method of the resealable paper container 90 were the same as in Example 1.

[0219] <Example 5> In this example, a resealable paper container 90 was produced using a blank plate 10 having a back-side cutout 551a provided at the back-side upper edge 21a of the back-side blank plate 10a, as shown in FIG. 11E, which corresponds to the fifth aspect of the first embodiment. The back-side cutout 551a measured 4 mm in length and 115 mm in width. The front-side blank plate 10b did not have a front-side opening tab 55b. The other aspects, such as the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the method of producing the resealable paper container 90, were the same as in Example 1.

[0220] Example 6 In this example, a paper container 90 with a zipper was produced using a blank plate 10 in which a back side cutout portion 551a was provided on the back side upper edge portion 21a of the back side blank plate 10a and a front side cutout portion 551b was provided on the front side upper edge portion 21b of the front side blank plate 10b, as shown in Figure 11F, which corresponds to the sixth aspect of the first embodiment.

[0221] The shape of the back side cut portion 551a is the same as the shape of the back side cut portion 551a in Example 1. The position is such that the center point of the semicircular shape is located 10 mm to the right of the center in the width direction of the resealable paper container 90. The shape of the front side cut portion 551b is the same as the shape of the front side cut portion 551b in Example 2. The position is such that the center point of the semicircular shape is located 10 mm to the left of the center in the width direction of the resealable paper container 90. Other aspects such as the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the method of producing the resealable paper container 90 were the same as those in Example 1.

[0222] Example 7 In this example, a paper container 90 with a zipper was produced using a blank plate 10 having a back side cutout 551a at the back side upper edge 21a of the back side blank plate 10a and a front side cutout 551b at the front side upper edge 21b of the front side blank plate 10b, as shown in Figure 11G, which corresponds to the seventh aspect of the first embodiment.

[0223] The shape of the back side cut portion 551a was the same as the shape of the back side cut portion 551a in Example 3. The left side of the rectangle was positioned 5 mm to the right of the center in the width direction of the resealable paper container 90. The shape of the front side cut portion 551b was the same as the shape of the back side cut portion 551a in Example 3. The right side of the rectangle was positioned 5 mm to the left of the center in the width direction of the resealable paper container 90. In this example, the back side cut portion 551a and the front side cut portion 551b did not overlap. Other aspects such as the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the method of producing the resealable paper container 90 were the same as those in Example 1.

[0224] Example 8 In this example, a paper container 90 with a zipper was produced using a blank plate 10 in which a back side cutout portion 551a was provided at the back side upper edge portion 21a of the back side blank plate 10a and a front side cutout portion 551b was provided at the front side upper edge portion 21b of the front side blank plate 10b, as shown in Figure 11H, which corresponds to the eighth aspect of the first embodiment.

[0225] The shape of the back side cut portion 551a was the same as the shape of the back side cut portion 551a in Example 3. The left side of the rectangle was positioned 5 mm left from the center in the width direction of the resealable paper container 90. The shape of the front side cut portion 551b was the same as the shape of the back side cut portion 551a in Example 3. The right side of the rectangle was positioned 5 mm right from the center in the width direction of the resealable paper container 90. In this example, the back side cut portion 551a and the front side cut portion 551b overlap by 10 mm in the left-right width direction. Other aspects such as the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the method of producing the resealable paper container 90 were the same as those in Example 1.

[0226] Example 9 In this example, a paper container 90 with a zipper was produced using a blank plate 10 having a back side notch 552a provided on the back side upper edge 21a of the back side blank plate 10a, as shown in Figure 12A, which corresponds to the first aspect of the second embodiment.

[0227] The rear side notches 552a were 4 mm long in the vertical direction, and two were provided. One rear side notch 552a was located 15 mm left from the center in the width direction of the resealable paper container 90. The other rear side notch 552a was located 15 mm right from the center in the width direction of the resealable paper container 90. Therefore, the distance between the two rear side notches 552a was 30 mm. No front side opening catch 55b was provided on the front side blank plate 10b. Other aspects such as the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the method of producing the resealable paper container 90 were the same as those in Example 1.

[0228] Example 10 In this example, a paper container 90 with a zipper was produced using a blank plate 10 in which a rear cutout 552a was provided on the rear upper edge 21a of the rear blank plate 10a and a front cutout 552b was provided on the front upper edge 21b of the front blank plate 10b, as shown in Figure 12B, which corresponds to the second aspect of the second embodiment.

[0229] The rear side cutouts 552a were 4 mm long in the vertical direction, and two cutouts were provided. One rear side cutout 552a was located 5 mm to the right of the center in the width direction of the resealable paper container 90. The other rear side cutout 552a was located 25 mm to the right of the center in the width direction of the resealable paper container 90. The front side cutouts 552b were shaped like straight lines with a vertical length of 4 mm, and two cutouts were provided. One of the front side cutouts 552b was located 5 mm to the left of the center in the width direction of the resealable paper container 90. The other back side cutout 552a was located 25 mm to the left of the center in the width direction of the resealable paper container 90. Other aspects such as the shape of the blank plate 10, the layer structure of the laminated sheet 78, and the method of producing the resealable paper container 90 were the same as those in Example 1.

[0230] <Comparative Example> In the comparative example, a resealable paper container 80 shown in Fig. 14 was produced using one blank plate 81 as shown in Fig. 13. The external dimensions of the completed resealable paper container 80 were approximately the same as those of the example. The layer structure of the laminated sheet of the blank plate 81 was the same as that of Example 1.

[0231] <Evaluation> Fifty samples each of Examples 1 to 10 and the Comparative Example were prepared and filled with snack foods.

[0232] In the samples of Examples 1 to 10, when the user initially opened the easy-open seal portion 53, an operation was performed so that a gap was provided between the front-side opening grip margin 57b between the front-side upper edge 21b and the easy-open seal portion 53, and the back-side opening grip margin 57a ​​between the back-side upper edge 21a and the easy-open seal portion 53. Then, the user grasped the front-side opening grip margin 57b and the back-side opening grip margin 57a ​​with their fingers, respectively, and spread them outward (in the front-to-back direction) of the resealable paper container 90.

[0233] At that time, the user was able to fully grasp the opening gripping portion 57, and was therefore able to easily peel off the easy-open seal portion 53. Then, the paper container 90 with the zipper was able to be initially opened.

[0234] After the initial opening of the resealable paper container 90, the zipper tape 61 was opened. Here, the area between the front side upper edge 21b and the front side zipper tape 61b was defined as the front side post-initial opening gripping area 571b. Also, the area between the rear side upper edge 21a and the rear side zipper tape 61b was defined as the rear side post-initial opening gripping area 571a. The user grasped the front and rear post-initial opening gripping areas 571 with their fingers and spread them outward (in the front-to-rear direction) of the resealable paper container 90. This allowed the zipper tapes 61 provided on the upper overlapping plate 34 and the side plates 41 of the top portions of the left and right sides to be easily released.

[0235] In the comparative example of the zippered paper container 80, the portion including the middle horizontal fold line (half fold line) 821 could be cut off and opened using a notch 877 provided on the top side plate 841 as an initial opening means and an easy-to-open processing line 851 provided on the upper overlapping plate 834 and the top side plate 841. Next, a person grasped the front opening gripping area 857b between the front easy-open processing line 851b and the front zipper tape 861b, and the back opening gripping area 857a between the back easy-open processing line 851a and the back zipper tape 861a, with their fingers and attempted to spread the zippered paper container 80 outward.

[0236] The comparative example of the resealable paper container 80 did not have an opening hook, so there was no gap between the front opening grip portion 857b and the back opening grip portion 857a, or even if there was a gap, it was very small. Therefore, it was not easy to insert fingers between the front opening grip portion 857b and the back opening grip portion 857a. To open it, people had to insert their fingernails or a flat tool between the front opening grip portion 857b and the back opening grip portion 857a to pry it open, which sometimes required time to release the zipper tape 861.

[0237] Furthermore, the packages of the resealable paper containers 90 of Examples 1 to 10 in which the resealable tape 61 had been released as described above were tested for suitability for removing the contents and resealability with the resealable zipper.

[0238] The fastening of the zipper tape 61 was easily released, opening the top of the zippered paper container 90 across almost the entire width, forming the opening for removal 56. The snacks packed inside could be easily removed through the opening for removal 56.

[0239] Furthermore, after removing a portion of the contents, the packages of the resealable paper containers 90 of Examples 1 to 10 could be easily resealed by reattaching the zipper tape 61. The remaining contents were then properly stored.

[0240] Furthermore, the resealable paper container 90 of the present disclosure had a paper mass ratio to the total mass of the resealable paper container 90 that fully satisfied the standard for a paper container of 51% by mass or more. [Explanation of symbols]

[0241] 10 Blank Board 10a Back blank board 10b Front blank plate 11 Side edge 12 First vertical fold line 13 Second vertical fold line 14 Second vertical fold imaginary line 15. Folding line of protruding top part 17 Top diagonal fold line 18 Bottom diagonal fold line 21 Upper edge 22 First horizontal fold line 23 Second horizontal fold line 24 Third horizontal fold line 25 Fourth horizontal fold line 26 Lower edge 31 Wall Panel 32 Side plate 33 Top plate 34 Upper overlapping plate 35 Bottom plate 36 Side edge seal allowance 37 Bottom seal 38 Top protrusion 41 Side panel of the top 43 Bottom side protrusion allowance 45 Top flap 52 Zipper tape joint 53 Easy-to-open seal 54 Easy peeling section 55 Opening tab 551 Excision part 552 Cutout 56 Removal opening 57 Opening grip 571 Initial opening and gripping time 61 Zipper Tape 62 Zipper tape body 63 Zipper tape fitting 71 Top of resealable paper container 72 Body of a resealable paper container 72d Ridge of the body 73 Bottom of resealable paper container 74 Top protrusion 76 Bending part of the protruding part on the top side 78 Laminated Sheet 781 Outermost thermoplastic resin layer 782 Paper base layer 783 Innermost thermoplastic resin layer 784 Intermediate adhesive layer 785 Barrier Layer 80 Conventional resealable paper container 81 Blank Board 81a Back blank board 81b Front blank board 821 Intermediate horizontal fold line (half fold line) 831 Wall Panel 834 Upper overlapping plate 841 Side plate of the top 851 Easy-open processed wire 856 Removal opening 857 Opening grip 861 Zipper tape 871 Heaven 872 Torso 874 Top protrusion 877 Notch 90 Paper container with a resealable fastener of the present disclosure 91 Paper container with a zipper in the intermediate stage of the present disclosure (flat state) 92 Paper container with zipper in intermediate stage of the present disclosure (box state) 93 A paper container with a zipper in a state in which the protrusion on the top side of the present disclosure is raised 94 A paper container with a zipper in a state where the top part of the present disclosure is open A. Enlarged view of a paper container with a zipper (in a boxed state) in the intermediate stage C Cutting position of enlarged cross section of zipper tape joint E First top intersection (intersection of the first vertical fold line and the first horizontal fold line) F Second top intersection (intersection of the second vertical fold line and the second horizontal fold line) G First bottom intersection (intersection of the first vertical fold line and the fourth horizontal fold line) H Second bottom intersection (intersection of the second vertical fold line and the third horizontal fold line)

Claims

1. A paper container with a zipper in which a blank plate made of a laminated sheet including a paper base layer is assembled, The blank plates include at least a front blank plate and a back blank plate, A top portion including an upper overlapping plate at the top of the zipper-equipped paper container, where the front blank plate and the back blank plate are overlapped and joined, and a top plate connected to the lower side of the upper overlapping plate; Side plates of the top portion connected to both left and right sides of the upper overlapping plate; A top portion protrusion provided on both the left and right sides of the top portion; A body portion provided below the top portion; a bottom portion provided below the body portion; An opening grip is provided at the upper edge of the upper overlapping plate and the side plate of the top portion; An easy-to-open seal portion located below the opening grip portion and crossing the upper overlapping plate and the side plate of the top portion; a zipper tape located below the easy-open seal portion and extending across the upper overlapping plate and the side plate of the top portion; At least the front blank plate or the back blank plate has an opening hook at the upper edge thereof, The opening hook is a cut-off portion of the paper container with a zipper.

2. 2. The resealable paper container according to claim 1, wherein the cutouts are provided on the upper edges of both the front blank plate and the back blank plate.

3. The resealable paper container according to claim 2, wherein the front cutout portion provided on the front blank plate and the back cutout portion provided on the back blank plate do not overlap.

4. A paper container with a zipper in which a blank plate made of a laminated sheet including a paper base layer is assembled, the paper base layer has a basis weight of 80 g / m 2 or more and 320 g / m 2 or less; The blank plates include at least a front blank plate and a back blank plate, A top portion including an upper overlapping plate at the top of the zipper-equipped paper container, where the front blank plate and the back blank plate are overlapped and joined, and a top plate connected to the lower side of the upper overlapping plate; Side plates of the top portion connected to both left and right sides of the upper overlapping plate; A top portion protrusion provided on both the left and right sides of the top portion; A body portion provided below the top portion; a bottom portion provided below the body portion; An opening grip is provided at the upper edge of the upper overlapping plate and the side plate of the top portion; An easy-to-open seal portion located below the opening grip portion and crossing the upper overlapping plate and the side plate of the top portion; a zipper tape located below the easy-open seal portion and extending across the upper overlapping plate and the side plate of the top portion; At least the front blank plate or the back blank plate has an opening hook at the upper edge thereof, The opening tab is a notch in the paper container with a zipper.

5. The resealable paper container according to claim 4, wherein the number of the cut portions is two or more and the cut portions are arranged in parallel.

6. The resealable paper container according to claim 4 or 5, wherein the notch is provided on the upper edge of both the front blank plate and the back blank plate.

7. The paper container with a zipper according to claim 6, wherein the front cutout provided on the front blank plate and the back cutout provided on the back blank plate do not overlap.

Images