Paper container with a chuck

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 opening / gripping margins 57, of at least either of the front blank plate 10b and the rear-side blank plate 10a.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present disclosure relates to a paper container with a chuck, and particularly to a paper container with a chuck that has a three-dimensional shape and self-standing properties and is easy to open the opening of the paper container with a chuck in the field of paper containers.

Background Art

[0002] Conventionally, as a paper container with a chuck, a technique such as that of Patent Document 1 has been disclosed. That is, a chuck is provided at the upper part of a rectangular parallelepiped paper container, and when taking out the contents, the chuck can be opened, and when the contents have been taken out, the chuck can be closed.

[0003] With the above technique, it is possible to protect the contents and prevent the contents from spilling when the paper container is overturned. Also, since it is a paper container, it is easy to reduce the volume of the container after consuming the contents and to discard it. FIG. 20 shows a blank plate 81 used for manufacturing a conventional paper container 80 with a chuck, FIG. 21 shows a perspective view of the conventional paper container 80 with a chuck, and FIG. 22 shows a perspective view in a state where the top is opened.

[0004] In addition, unless otherwise specified hereinafter, referring to FIG. 21, with the outer wall panel 831b of the front side as the front, the front, back, left, right, top, and bottom of the paper container 80 with a chuck are shown. The same applies to the paper container 90 with a chuck of the present disclosure.

[0005] Also, the reference numerals used when describing the prior art are in the 80s or 800s in order to distinguish them from the present disclosure. Also, the subscript a of the reference numeral indicates an element of the back side portion of the paper container 80 with a chuck, and the subscript b indicates an element of the front side portion. In an element having both subscripts a and b, the reference numeral without a subscript may include both a and b.

[0006] In the paper container 80 with a chuck described in Patent Document 1, when opening the top portion 871 and taking out the contents, first, the protruding portion 874 on the top surface is removed from the body portion 872. Next, after the tear-open processing line 851 is cut, the male and female fitting portions of the chuck tape 861 are disengaged, and the take-out opening 856 is opened (see Fig. 22). Then, the contents are taken out through the take-out opening 856.

[0007] When opening the chuck tape 861, the upper front opening gripping margin 857b of the front surface chuck tape 861b and the upper back opening gripping margin 857b of the back surface chuck tape 861a are each grasped with fingers and opened in the front-rear direction of the paper container 80 with a chuck. At that time, the front surface opening gripping margin 857b and the back surface opening gripping margin 857a may adhere to each other and there may be no gap. Therefore, it becomes difficult to insert a finger, making it difficult to disengage the chuck tape 861 and sometimes making it difficult to open the paper container 80 with a chuck.

[0008] When manufacturing the paper container 80 with a chuck, there is a process of bending the intermediate horizontal folding line (half-fold line) 821 of the blank plate 81. At that time, there is a risk that the tear-open processing line 851 located nearby may be accidentally bent. Also, the tear-open processing line 851 is a portion where the strength of the blank plate is weak. In other manufacturing processes as well, if the tear-open processing line 851 is accidentally bent, it becomes difficult to produce the paper container 80 with a chuck, and the blank plate 81 may become a defective product and be discarded.

Prior Art Documents

Patent Documents

[0009] [[ID=I8]]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0010] The present disclosure has been made to solve the above problems, and in the paper container 90 with a chuck, an opening means is used instead of an easy-opening processing line as an initial opening means. And an object of the present disclosure is to provide a paper container 90 with a chuck that reduces failures and reduces losses of the blank plate 10 when the paper container 90 with a chuck is manufactured by the opening means. Furthermore, when a user initially opens the paper container 90 with a chuck by using fingers to operate the opening means, a paper container 90 with a chuck that is easy to open is provided.

Means for Solving the Problems

[0011] The above problems can be solved by the following embodiments of the present disclosure. That is, the paper container 90 with a chuck of the present disclosure is In the paper container 90 with a chuck in which a blank plate 10 made of a laminated sheet 78 including a paper base material layer 782 is assembled, The blank plate 10 includes at least a front blank plate 10b and a back blank plate 10a, At the upper part of the paper container 90 with a chuck, a top part 71 including 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 continuously provided below the upper overlapping plate 34, Side plates 41 of the top part continuously provided on both left and right sides of the upper overlapping plate 34, Top part side protrusions 74 continuously provided on both left and right sides of the top part 71, A body part 72 provided below the top part 71, A bottom part 73 provided below the body part 72, An opening gripping margin 57 at the upper edge part 21 of the upper overlapping plate 34 and the side plates 41 of the top part, An easy-opening seal part 53 located below the opening gripping margin 57 and crossing the upper overlapping plate 34 and the side plates 41 of the top part, A chuck tape 61 located below the easy-opening seal part 53 and crossing the upper overlapping plate 34 and the side plates 41 of the top part, At least one of the front blank plate 10b or the back blank plate 10a is provided with an opening starting portion 55 at the opening gripping margin 57.

[0012] Also, in the paper container 90 with a chuck of the present disclosure, The opening starting portion 55 may be provided at the upper edge portion 21 of both the easy-open seal portions 53 of the front blank plate 10b and the back blank plate 10a.

[0013] Also, in the paper container 90 with a chuck of the present disclosure, The opening starting portion 55 may be a ruled line.

[0014] Also, in the paper container 90 with a chuck of the present disclosure, The ruled line of the opening starting portion 55 may include a ruled line that is concave when viewed from the outside of the paper container 90 with a chuck.

[0015] Also, in the paper container 90 with a chuck of the present disclosure, The ruled line of the opening starting portion 55 may include a ruled line that is convex when viewed from the outside of the paper container 90 with a chuck.

[0016] Also, in the paper container 90 with a chuck of the present disclosure, The opening starting portion 55 may include a horizontal ruled line extending in the lateral direction of the paper container 90 with a chuck.

[0017] Also, in the paper container 90 with a chuck of the present disclosure, The opening starting portion 55 may include two or more horizontal ruled lines.

[0018] Also, in the paper container 90 with a chuck of the present disclosure, The opening starting portion 55 may include a vertical ruled line extending in the longitudinal direction of the paper container 90 with a chuck.

[0019] Also, in the paper container 90 with a chuck of the present disclosure, The opening hook 55 includes two or more vertical lines extending in the vertical direction of the resealable paper container 90, The vertical lines may be positioned in the lateral direction of the resealable paper container 90 relative to one another.

[0020] In addition, in the resealable paper container 90 of the present disclosure, The opening hook 55 may include a concave embossed portion that is concave when viewed from the outside of the resealable paper container 90.

[0021] In addition, in the resealable paper container 90 of the present disclosure, The opening hook 55 may include a convex embossed portion that is convex when viewed from the outside of the resealable paper container 90. [Effects of the Invention]

[0022] 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 side of 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 shape the front side upper edge 21b and / or the back side upper edge 21a to open outward. As a result, an opening catch gap 58 is formed between the front side opening grip margin 57b and the back side 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, making the front side opening grip margin 57b and the back side opening grip margin 57a easy to grasp with their fingers.

[0023] 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]

[0024] [Figure 1A] It is a developed view of the front blank plate 10b used for manufacturing the chucked paper container 90 of the first aspect of the first embodiment of the present disclosure. [Figure 1B] It is a developed view of the back blank plate 10a used for manufacturing the chucked paper container 90 of the first aspect of the first embodiment of the present disclosure. [Diagram 2] It is a front view showing the shape of the paper container (flat state) 91 at an intermediate stage when manufacturing the chucked paper container 90 using the blank plate 10 shown in FIGS. 1A and 1B. [Figure 3] It is a perspective view showing the shape of the paper container (raised state) 92 at an intermediate stage when manufacturing the chucked paper container 90 using the blank plate 10 shown in FIGS. 1A and 1B. [Figure 4] It is a perspective view of the chucked paper container 90 manufactured using the blank plate 10 shown in FIGS. 1A and 1B. [Figure 5] It is a side view of the chucked paper container 90 shown in FIG. 4. [Figure 6] It is a plan view of the chucked paper container 90 shown in FIG. 4. [Figure 7] It is a perspective view of the chucked paper container 9, where the top portion protruding part 74 is caused. [Figure 8] It is a perspective view of the chucked paper container 94 with the top portion 71 opened. [Figure 9A] It is a cross-sectional view of the laminated sheet 78 of one aspect of the blank plate 10. [Figure 9B] It is a cross-sectional view of the laminated sheet 78 of another aspect of the blank plate 10. [Figure 9C] It is a cross-sectional view of the laminated sheet 78 of still another aspect of the blank plate 10. [Figure 9D] It is a cross-sectional view of the laminated sheet 78 of still another aspect of the blank plate 10. [Figure 10A] It is an enlarged cross-sectional view of one aspect of the joint portion between the blank plate 10 and the chuck tape 61. (Refer to the cross-sectional position C-C in FIG. 2). [Figure 10B]It is an enlarged cross-sectional view of another aspect of the joint between the blank plate 10 and the chuck tape 61. (Refer to the cross-section position C-C in Fig. 2). [Figure 11A] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the first aspect of the first embodiment. (An enlarged view of part A in Fig. 2). [Figure 11B] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the second aspect of the first embodiment. (An enlarged view of part A in Fig. 2). [Figure 11C] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the third aspect of the first embodiment. (An enlarged view of part A in Fig. 2). [Figure 11D] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the fourth aspect of the first embodiment. (An enlarged view of part A in Fig. 2). [Figure 12A] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the first aspect of the second embodiment and the first aspect of the fourth embodiment. (An enlarged view of part A in Fig. 2). [Figure 12B] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the second aspect of the second embodiment and the second aspect of the fourth embodiment. (An enlarged view of part A in Fig. 2). [Figure 13A] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the first aspect of the third embodiment and the first aspect of the fifth embodiment. (An enlarged view of part A in Fig. 2). [Figure 13B] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the second aspect of the third embodiment and the second aspect of the fifth embodiment. (An enlarged view of part A in Fig. 2). [Figure 13C] It is a partially enlarged view of the paper container at the intermediate stage (planar state) of the chucked paper container 90 in the third aspect of the fifth embodiment. (An enlarged view of part A in Fig. 2). [Figure 14] It is a cross-sectional view of the upper overlapping plate 34 at the cross-section position D-D shown in Fig. 7 in the chucked paper container 90 in the first aspect of the first embodiment. [Figure 15A] End view of the upper edge 21 of the chuck-equipped paper container 93 in which the top portion protrusion 74 in FIG. 7 is caused in the chuck-equipped paper container 90 of the first aspect, second aspect, and third aspect of the first embodiment. (Refer to arrow B shown in FIG. 7). [Figure 15B] End view of the upper edge 21 of the chuck-equipped paper container 93 in which the top portion protrusion 74 in FIG. 7 is caused in the chuck-equipped paper container 90 of the fourth aspect of the first embodiment. (Refer to arrow B shown in FIG. 7). [Figure 16A] End view of the upper edge 21 of the chuck-equipped paper container 93 in which the top portion protrusion 74 in FIG. 7 is caused in the chuck-equipped paper container 90 of the first aspect of the second embodiment. (Refer to arrow B shown in FIG. 7). [Figure 16B] End view of the upper edge 21 of the chuck-equipped paper container 93 in which the top portion protrusion 74 in FIG. 7 is caused in the chuck-equipped paper container 90 of the second aspect of the second embodiment. (Refer to arrow B shown in FIG. 7). [Figure 17A] End view of the upper edge 21 of the chuck-equipped paper container 93 in which the top portion protrusion 74 in FIG. 7 is caused in the chuck-equipped paper container 90 of the first aspect of the third embodiment. (Refer to arrow B shown in FIG. 7). [Figure 17B] End view of the upper edge 21 of the chuck-equipped paper container 93 in which the top portion protrusion 74 in FIG. 7 is caused in the chuck-equipped paper container 90 of the second aspect of the third embodiment. (Refer to arrow B shown in FIG. 7). [Figure 18A] End view of the upper edge 21 of the chuck-equipped paper container 93 in which the top portion protrusion 74 in FIG. 7 is caused in the chuck-equipped paper container 90 of the first aspect of the fourth embodiment. (Refer to arrow B shown in FIG. 7). [Figure 18B] End view of the upper edge 21 of the chuck-equipped paper container 93 in which the top portion protrusion 74 in FIG. 7 is caused in the chuck-equipped paper container 90 of the second aspect of the fourth embodiment. (Refer to arrow B shown in FIG. 7). [Figure 19A]FIG. 0 is an end view of the upper edge 21 of the chuck-equipped paper container 93 in which the top bulge 74 of FIG. 7 is caused in the chuck-equipped paper container 90 according to the first aspect of the fifth embodiment. (See arrow B shown in FIG. 7). [Figure 19B] FIG. 3 is an end view of the upper edge 21 of the chuck-equipped paper container 93 in which the top bulge 74 of FIG. 7 is caused in the chuck-equipped paper container 90 according to the second aspect of the fifth embodiment. (See arrow B shown in FIG. 7). [Figure 19C] FIG. 6 is an end view of the upper edge 21 of the chuck-equipped paper container 93 in which the top bulge 74 of FIG. 7 is caused in the chuck-equipped paper container 90 according to the third aspect of the fifth embodiment. (See arrow B shown in FIG. 7). [Figure 20] FIG. 9 is a developed view of the blank plate 81 used for manufacturing the conventional chuck-equipped paper container 80. [Figure 21] FIG. 12 is a perspective view of the conventional chuck-equipped paper container 80. [Figure 22] FIG. 15 is a perspective view of the state where the top 871 of the chuck-equipped paper container 80 shown in FIG. 20 is opened.

MODE FOR CARRYING OUT THE INVENTION

[0025] Hereinafter, the present disclosure will be described with reference to the drawings. However, the present disclosure is not limited to these specifically shown forms or various specifically described structures. In each figure, for the sake of clarity, the size and ratio of the members may be changed or exaggerated. Also, for the sake of visibility, parts that are unnecessary for explanation and repeated reference numerals may be omitted.

[0026] In addition, the numerical values such as the dimensions of each member described in this specification and the material names are examples as embodiments, and are not limited thereto, and can be appropriately selected and used. In this specification, terms that specify shapes and geometric conditions, such as terms like parallel, orthogonal, and perpendicular, include not only the strictly meant meaning but also substantially the same state.

[0027] The blank plate 10 of the paper container 90 with a chuck according to the present disclosure is formed with a rectangular outer shape using a laminated sheet 78 in which a paper base material layer 782 is laminated and a thermoplastic resin such as polyethylene is laminated at least as the innermost layer. Further, various folding lines provided in the blank plate 10 define forming plates for respective parts necessary for forming the paper container 90 with a chuck and constitute the blank plate 10.

[0028] <The first aspect of the first embodiment> <Blank plate> The blank plate 10 of the paper container 90 with a chuck in this aspect is shown in FIGS. 1A and 1B. FIG. 1A shows the back blank plate 10a, and FIG. 1B shows the front blank plate 10b. Note that the two sheets, the back blank plate 10a and the front blank plate 10b, are collectively referred to as the blank plate 10.

[0029] Also, unless otherwise specified, in each component of the blank plate 10 described later, the subscript a of each reference numeral indicates an element of the back blank plate 10a, and the subscript b indicates an element of the front blank plate 10b. In an element having both subscripts a and b, the reference numeral without a subscript may include both a and b.

[0030] The back upper edge portion 21a, which is the lower side of the drawing of the back blank plate 10a in FIG. 1A, becomes the upper side of the paper container 90 with a chuck. The front upper edge portion 21b, which is the upper side of the drawing of the front blank plate 10b in FIG. 1B, becomes the upper side of the paper container 90 with a chuck.

[0031] In both FIGS. 1A and 1B, the front side of the drawing becomes the outer side when the paper container 90 with a chuck is assembled, and the back side becomes the inner side. FIGS. 1A and 1B are line-symmetrical with respect to their respective upper edge portions 21a and 21b, excluding some components (for example, the opening start portion 55, etc.) described later. When the inner surfaces of the back blank plate 10a and the front blank plate 10b are overlapped with their positions aligned, each component (each forming plate, line, seal portion, chuck tape joint portion, etc. described later) overlaps.

[0032] The above-mentioned back blank plate 10a and front blank plate 10b that are aligned and overlapped are joined together to produce a chucked paper container (flat state) 91 at an intermediate stage as shown in FIG. 2, and further a chucked paper container (raised state) 92 at an intermediate stage as shown in FIG. 3 is produced, and the procedure proceeds toward the completion of the chucked paper container 90. This manufacturing method will be described later.

[0033] In the future, unless otherwise specified, with reference to FIG. 1B, the top, bottom, left, and right of the front blank plate 10b are indicated. For the back blank plate 10a as well, its upper edge 21a is described as the upward side. Therefore, in FIG. 1A, the up and down are reversed. Also, in the chucked paper container 90, its upper edge 21 side is regarded as the upward side, and its lower edge 26 side is regarded as the downward side.

[0034] The formed chucked paper container 90, which will be described later, is composed of a top portion 71, a body portion 72, and a bottom portion 73 in sequence from the upward side. Sometimes, the above-mentioned upward side is referred to as the top side, and the downward side is referred to as the bottom side. (See FIG. 4). Also, when explaining the vertical direction of each component provided on the top portion 71, the description of the top side indicates the upper edge 21 side, and when explaining the vertical direction of each component provided on the bottom portion 73, the description of the bottom side may indicate the lower edge 26 side.

[0035] As described above, since the back blank plate 10a and the front blank plate 10b are substantially line-symmetric in shape vertically, the description of the blank plate 10 will be made with the front blank plate 10b. Also, the back blank plate 10a and the front blank plate 10b have the same material (layer structure) and manufacturing method.

[0036] The front blank plate 10b of the paper container 90 with a chuck of this embodiment is formed with an outer shape that is substantially rectangular using a laminated sheet 78 obtained by laminating at least a base paper and laminating a thermoplastic resin such as polyethylene as at least the innermost layer. Referring to FIG. 1B, the upper surface is defined as the upper edge portion 21b of the front surface, the left and right sides are defined as the side edge portions 11b of the front surface, and the lower surface is defined as the lower edge portion 26b of the front surface. Further, the front blank plate 10b has a symmetric shape with a vertical line passing through the central portion in the width direction as the axis of symmetry. The laminated sheet 78 will be described later.

[0037] On the front blank plate 10b, a first transverse folding line 22b, a second transverse folding line 23b, a third transverse folding line 24b, and a fourth transverse folding line 25b of the front surface, which exist in the transverse direction in sequence from the upper edge portion 21b of the front surface, are provided. It is desirable that each of those front transverse folding lines 22b, 23b, 24b, and 25b is parallel to the upper edge portion 21b and the lower edge portion 26b of the front surface.

[0038] On the front blank plate 10b, a first longitudinal folding line 12b of the front surface that longitudinally cuts, a second longitudinal folding line 13b of the front surface, a second longitudinal folding line 13b of the front surface, and a first longitudinal folding line 12b of the front surface are provided in sequence from the left side. That is, the longitudinal folding line closer to the side edge portion 11b of each front blank plate 10b is the first longitudinal folding line 12b of the front surface, and the longitudinal folding line farther from the side edge portion 11b of the front blank plate 10b is the second longitudinal folding line 13b of the front surface. It is desirable that each of those front longitudinal folding lines 12b and 13b is substantially parallel to the side edge portion 11b of the front blank plate 10b.

[0039] Furthermore, a pair of diagonal folding lines 17b of the front top surface and diagonal folding lines 18b of the front bottom surface are provided on the left and right, respectively, and forming plates for each part necessary for forming the paper container 90 with a chuck are partitioned and configured.

[0040] The obverse-side top-side diagonal folding line 17b starts from the obverse-side second top intersection point Fb, which is the intersection of the obverse-side second vertical folding line 13b and the obverse-side second horizontal folding line 23b. Furthermore, the obverse-side top-side diagonal folding line 17b connects the above-mentioned obverse-side second top intersection point Fb and the obverse-side first top intersection point Eb, which is the intersection of the obverse-side first vertical folding line 12b and the obverse-side first horizontal folding line 22b, and further extends to the obverse-side side edge portion 11b. And the intersection of the obverse-side side edge portion 11b and the obverse-side top-side diagonal folding line 17b is the end point of the obverse-side top-side diagonal folding line 17b.

[0041] The obverse-side bottom-side diagonal folding line 18b starts from the obverse-side second bottom intersection point Hb, which is the intersection of the obverse-side second vertical folding line 13b and the obverse-side third horizontal folding line 24b. Furthermore, the obverse-side bottom-side diagonal folding line 18b connects the above-mentioned obverse-side second bottom intersection point Hb and the obverse-side first bottom intersection point Gb, which is the intersection of the obverse-side first vertical folding line 12b and the obverse-side fourth horizontal folding line 25b, and further extends to the obverse-side side edge portion 11b. And the intersection of the obverse-side side edge portion 11b and the obverse-side bottom-side diagonal folding line 18b is the end point of the obverse-side bottom-side diagonal folding line 18b.

[0042] Note that the obverse-side top-side diagonal folding line 17b may be located in the vicinity without being in contact with the obverse-side second top intersection point Fb. Furthermore, the obverse-side bottom-side diagonal folding line 18b may be located in the vicinity without being in contact with the obverse-side second bottom intersection point Hb.

[0043] Also, the obverse-side top-side diagonal folding line 17b is not in contact with the obverse-side first top intersection point Eb, and the vicinity thereof may not exist. Alternatively, between the obverse-side top-side diagonal folding line 17b, the obverse-side first top intersection point Eb, and the obverse-side side edge portion 11b may not exist. Furthermore, the obverse-side bottom-side diagonal folding line 18b is not in contact with the obverse-side first bottom intersection point Gb, and the vicinity thereof may not exist. Alternatively, between the obverse-side bottom-side diagonal folding line 18b, the obverse-side first bottom intersection point Gb, and the obverse-side side edge portion 11b may not exist.

[0044] Since the intersection points of the diagonal folding lines in each of the above tables are not in contact but are located in the vicinity, it has sufficient folding performance, and there is no excessive concentration of folding lines at specific locations, preventing a decrease in the strength of the laminated sheet of the outer blank plate 10b.

[0045] On both left and right side edges 11b of the outer blank plate 10b, an outer side edge seal margin 36b is formed via the outer first longitudinal folding line 12b.

[0046] Also, on the lower edge 26b of the outer blank plate 10b located on the underside, an outer bottom edge seal margin 37b is formed via the outer fourth transverse folding line 25b.

[0047] Also, on the outer blank plate 10b, forming plates of each part are sequentially provided in the downward direction from the upper edge 21b of the outermost layer located at the uppermost side.

[0048] Regarding the main part, an upper outer overlapping plate 34b is provided below the central region of the upper edge 21b of the outer side. Below the upper outer overlapping plate 34b, an outer top plate 33b is continuously provided via the outer first transverse folding line 22b. Below the outer top plate 33b, an outer wall plate 31b is continuously provided via the outer second transverse folding line 23b. Below the outer wall plate 31b, an outer bottom plate 35b is continuously provided via the outer third transverse folding line 24b.

[0049] Also, on both outer sides of the left and right of the upper outer overlapping plate 34b, outer side plates 41b of the top part are continuously provided via the outer second longitudinal folding line 13b.

[0050] Also, on both outer sides of the left and right of the outer top plate 33b, outer top protruding margins 38b are continuously provided via the outer second longitudinal folding line 13b.

[0051] On both the left and right outer sides of the front wall panel 31b, the front side panel 32b is continuously provided via the front second vertical folding line 13b.

[0052] On both the left and right outer sides of the front bottom panel 35b, the front bottom side protruding portion substitute 43b is continuously provided via the front second vertical folding line 13b.

[0053] Also, on the underside of the side plate 41b of the front top portion, the front top side protruding portion substitute 38b is continuously provided via the front first horizontal folding line 22b. On the underside of the front top side protruding portion substitute 38b, the front side panel 32b is continuously provided via the front second horizontal folding line 23b. On the underside of the front side panel 32b, the front bottom side protruding portion substitute 43b is continuously provided via the front third horizontal folding line 24b.

[0054] The bottom side seal substitute 37b is continuously provided on the underside of the above-mentioned front bottom panel 35b and the front bottom side protruding portion substitute 43b on both its left and right sides.

[0055] On the left and right outer sides of the above-mentioned side plate 41b of the front top portion, the front top side protruding portion substitute 38b, the front side panel 32b, and the front bottom side protruding portion substitute 43b, the front side edge side seal substitute 36b is continuously provided via the front first vertical folding line 12b.

[0056] Furthermore, on the upper side of the front chuck tape joint portion 52b, as the front unsealing starting portion 55b, a front concave horizontal ruled line 551b that crosses at least between the front second vertical folding lines 13b on both the left and right sides is provided. Note that the front unsealing starting portion 55b and the back unsealing starting portion 55a may have the same shape or different shapes including the shapes described later.

[0057] The process of applying a folding line to the blank plate 10 of this aspect (ruling process) is to perform the ruling process after the laminated sheet 78 is completed, and then supply the laminated sheet to a machine for manufacturing the paper container 90 with a chuck. Alternatively, the ruling process may be carried out by a machine for manufacturing the paper container 90 with a chuck.

[0058] As a method of the ruling process, an appropriate method is adopted from known methods such as a platen method and a rotary die method. Also, before performing the ruling process, the laminated sheet 78 may be sheet-cut. Alternatively, the laminated sheet 78 may be supplied to the ruling process in a roll form.

[0059] Also, the punching process for manufacturing the blank plate 10 by punching the laminated sheet 78 will be described. For the punching process, an appropriate method is selected from known methods such as a platen method and a rotary die method. The blank plate 10 may be directly formed from the roll-shaped laminated sheet 78, or may be punched after once sheet-cutting into individual sheets. Also, the order of the ruling process and the punching process does not matter. They may be processed simultaneously.

[0060] Also, a roll-shaped laminated sheet 78 slit to a predetermined roll width may be supplied to a machine for manufacturing the paper container 90 with a chuck, and cut in the transverse direction of the roll-shaped laminated sheet 78 to produce the blank plate 10.

[0061] Also, the back blank plate 10a is line-symmetric and has the same shape as the front blank plate 10b. In other words, it is a blank plate of substantially the same shape with the layer structure of the blank plate reversed.

[0062] FIG. 2 is a front view showing the shape of the paper container 91 with a chuck in an intermediate stage when manufacturing the paper container 90 with a chuck using the blank plate 10 shown in FIGS. 1A and 1B. The uppermost part is the upper edge 21b of the front blank plate 10b shown in FIG. 1B, and on the back side thereof, a back blank plate 10a is provided. Although the back blank plate 10a cannot be seen visually, when viewed through, it has substantially the same shape as the front blank plate 10b.

[0063] In FIG. 2, the back blank plate 10a and the front blank plate 10b overlap, and each component has the same positional relationship when the drawing is viewed through within the range of manufacturing variations. Therefore, the notation and subscript of "front side" may be omitted during the explanation.

[0064] An enlarged view of the upper part of the paper container 91 with a chuck in the intermediate stage (flat state) is shown in FIG. 11A. It is an enlarged view of the area A shown in FIG. 2. On the upper side of the easy-open seal portion 53, a concave horizontal ruled line 551 that crosses between the left and right side edges 11 is provided. The concave horizontal ruled line 551 is an aspect of the opening start portion 55 to be described later.

[0065] On the upper overlapping plate 34 and the side plate 41 of the front top portion, at a predetermined position where the two blank plates 10 overlap each other, a concave horizontal ruled line 551 as the opening start portion 55, an easy-open seal portion 53 as a transverse sealing means, and a chuck tape joint portion 52 are sequentially provided from the upper edge 21 side. The chuck tape joint portion 52 is a corresponding portion of the blank plate 10 to which the chuck tape 61 is joined.

[0066] With reference to FIGS. 7 and 14, the opening start portion 55 will be described. When the user initially opens the top portion 71 of the paper container 90 with a chuck containing the contents, first, the easy-open seal portion 53 on the top portion 71 is peeled off to expose the chuck tape 61. At that time, by grasping the front opening grip margin 57b and the back opening grip margin 57a with fingers and opening in the front-rear direction of the paper container with a chuck, the easy-open seal portion 53 is peeled off.

[0067] At this time, if a tear-starting gap 58 is formed between the front-opening gripping margin 57b and the back-opening gripping margin 57a, it becomes easier for the user to insert a finger, and the easy-opening seal portion 53 is more likely to peel off. In addition, by providing a tear-starting portion 55 on the upper side of the easy-opening seal portion 53, the tear-starting gap 58 is more likely to be formed.

[0068] In this embodiment, a concave horizontal ruled line 551, which is one embodiment of the tear-starting portion 55, is illustrated across between the side edges 11 on both the left and right sides. A concave horizontal ruled line 551, which is concave as viewed from the outside of the paper container 90 with a chuck, is provided on the upper side of the easy-opening seal portion 53.

[0069] The easy-opening seal portion 53 as a sealing means in the transverse direction is formed by joining the front-side easy-opening seal portion 53b and the back-side easy-opening seal portion 53a that are to face each other. Since the joining is made so as to cross the entire width of the paper container 90 with a chuck, the sealing of the paper container 90 with a chuck is maintained. If the easy-opening seal portion 53 is substantially parallel to the upper edge portion 21, the length of the easy-opening seal portion 53 can be shortened.

[0070] Furthermore, it is desirable that the chuck tape 61 is substantially parallel to the upper edge portion 21. In such a form, the opening and closing of the chuck tape 61 and the taking out of the contents become easy. Also, the length of the chuck tape 61 can be shortened.

[0071] <Easy-opening seal portion> With reference to FIGS. 7, 8, and 14, the easy-opening seal portion 53 will be described. The easy-opening seal portion 53 has the function of sealing the top portion 71 of the paper container 90 with a chuck. Furthermore, when opening the top portion 71 of the paper container 90 with a chuck in order to take out the contents, it has the function of being easily peeled off to form an opening portion 56 for taking out. Therefore, the user can open the paper container 90 with a chuck with their fingers without using tools such as scissors.

[0072] In order for the easily openable seal portion 53 to be easily opened by the user's fingers, the easily openable seal portion 53 must be sealed with an appropriate peel strength (upper limit). Furthermore, in order to have an appropriate seal for the contents, it is desirable 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. In order to set the appropriate peel strength, an easily peelable processed portion 54 is provided at the interface where the easily openable seal portion 53 is joined, that is, on the inner surface of the blank plate 10. The peel strength of the easily openable seal portion 53 is appropriately set by the easily peelable processed portion 54.

[0073] 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 and drying a coating liquid of an easy peelable thermo-adhesive resin or a resin called an anti-heat sealant in a pattern by means such as gravure printing or flexographic printing.

[0074] When the easily peelable processed portion 54 is formed of an easy peelable thermo-adhesive resin, as the easy peelable thermo-adhesive resin, for example, a resin composition obtained by appropriately mixing polystyrene, chlorinated polypropylene, polybutene-1, inorganic or organic fillers, polyethylene wax, fatty acid amide, etc. as additives with polyolefin resins such as low density polyethylene and ethylene-vinyl acetate copolymer may be used.

[0075] As the above-mentioned inorganic or organic fillers, as the inorganic fillers, powders such as silica, calcium carbonate, talc, kaolin, clay, titanium oxide, alumina, aluminum hydroxide, etc. can be used, and silica powder is particularly preferred. Also, as the organic fillers, powders such as melamine resin, urea resin, alkyd resin, epoxy resin, acrylic resin, polystyrene, fluorinated ethylene-based resin, silicone resin, etc. can be used.

[0076] The content of the above-mentioned additive in the above-mentioned resin composition is preferably 4% by mass or more and 40% by mass or less. When the content of the additive is less than 4% by mass, the peel strength becomes strong and a good easy-opening seal part 53 (easy peelability) cannot be obtained. When the content of the additive exceeds 40% by mass, the peel strength becomes too weak, which is not preferable.

[0077] The coating amount of the easy-peelable thermoadhesive resin as described above is 2 g / m in terms of the coating amount when dry 2 or more and 8 g / m 2 or less is preferable, and 3 g / m 2 or more and 5 g / m 2 or less is more preferable.

[0078] Also, when the easy-peeling processed part 54 is formed with an anti-heat-sealing agent, as the anti-heat-sealing agent, a resin composition in which a mold release agent is mixed with the base resin in an appropriate amount can be used. For this base resin, for example, ethyl cellulose, cyclized rubber, acrylic resin, etc. can be used, and for the mold release agent, for example, silicone resin, polyethylene wax, soybean lecithin, higher fatty acid amide, etc. can be used. When applying the anti-heat-sealing agent, the coating amount can be small, and in terms of thickness, 0.3 μm or more and 2 μm or less is appropriate.

[0079] Note that since the easy-peeling processed part 54 weakens the bonding force between the inner surfaces of the blank plates 10, it is desirable not to provide it at the locations where strong bonding is desired. In this embodiment, as shown in FIG. 11A, it is desirable that the easy-peeling processed part 54 does not extend to the region of the seal margin 36 at the side edge fold. Considering manufacturing variations, the side edge fold seal margin 36 and the easy-peeling processed part 54 may be separated. The separation interval may be 0.5 mm or more and 15 mm or less.

[0080] If the interval is less than 0.5 mm, there is a risk that the side edge fold seal margin 36b and the easy-peeling processed part 54 may overlap due to manufacturing variations. If the interval exceeds 15 mm, the opening when the top portion 71 of the paper container 90 with a chuck is fully opened may become small, making it difficult to take out the contents.

[0081] Also, the vertical length (height) of the easily peelable processing portion 54 may be larger in the range of 0.5 mm or more and 5 mm or less than the vertical length (height) of the easily unsealable seal portion 53. This is because even if the easily peelable processing portion 54 and / or the easily unsealable seal portion 53 is displaced from the predetermined position due to manufacturing errors, the easily unsealable seal portion 53 does not deviate from the area of the easily peelable processing portion 54. Therefore, the width of the easily unsealable seal portion 53 is maintained at a predetermined width, and the peel strength is stabilized. Note that if the size is less than 0.5 mm, there is a risk that the easily unsealable seal portion 53 may deviate from the area of the easily peelable processing portion 54. Furthermore, if the size exceeds 5 mm, there is a risk that the easily peelable processing portion 54 and the chuck tape joint portion 52 may interfere with each other, inhibiting the joint between the chuck tape 61 and the blank plate 10 described later.

[0082] In this aspect, the easily peelable processing portion 54 is provided as described above in order to appropriately set the peel strength of the easily unsealable seal portion 53. However, if the peel strength can be appropriately set by other methods, the easily peelable processing portion 54 does not necessarily have to be provided. As an example of other methods, the heat seal conditions (temperature, time, pressure, etc.) of the easily unsealable seal portion 53 may be appropriately set. Alternatively, in the area of the easily unsealable seal portion 53, it may be in a dot shape, stripe shape, etc., and the peel strength may be set while reducing the substantial heat seal area.

[0083] <Chuck Tape> The chuck tape 61 is formed by extrusion molding of a male chuck tape 61m and a female chuck tape 61f, respectively, and a male chuck tape fitting portion 63m and a female chuck tape fitting portion 63f are fitted together.

[0084] <Procedure for Joining the Chuck Tape> The procedure for assembling the paper container 90 with a chuck will be described later. Among those procedures, the procedure for joining the chuck tape 61 will be described here.

[0085] In this case, the chuck tape joint 52 is the planned joint portion of the chuck tape 61 when assembling the paper container 90 with a chuck.

[0086] The back blank plate 10a and the front blank plate 10b are overlapped, and the side edge seal margins 36 and the easy-open seal portions 53 are heat-sealed together. At that time, the chuck tape 61 in which the male chuck tape 61m and the female chuck tape 61f are previously fitted at the male chuck tape fitting portion 63m and the female chuck tape fitting portion 63f is inserted into this portion. Then, simultaneously, the outer surfaces of the two blank plates 10 are heated and pressed at the chuck tape joint 52. Then, the blank plate 10 and the chuck tape 61 are heat-sealed. (See FIGS. 10A and 10B).

[0087] Note that the joining of the chuck tape 61 to the blank plate 10 is not limited to the heat-sealing as described above, and may be joined by other methods such as an adhesive or an adhesive tape.

[0088] By heat-sealing the chuck tape 61 in such a manner, compared with the method of heat-sealing the male chuck tape 61m and the female chuck tape 61f separately to the chuck tape joint 52, the misalignment of the heat-sealing is reduced, and the attachment process is simplified, so that the chuck tape 61 can be attached with high production efficiency.

[0089] <Laminated Sheet of Blank Plate> 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 material layer 782 is laminated and a thermoplastic resin such as polyethylene is laminated as at least the innermost thermoplastic resin layer 783. Further, a barrier layer 785 for water vapor, oxygen, and other substances, a strength improvement layer, etc. can be provided in the intermediate layer as needed.

[0090] When a printing layer such as a pattern is provided on the paper container 90 with a chuck of this embodiment, usually it is printed on the outside of the paper base material layer 782. However, if the printability of the paper base material layer 782 is not good, for example, a printing layer such as a pattern can be provided on a synthetic resin film such as a biaxially stretched polyethylene terephthalate film, and the film can be laminated on any layer on the outside of the paper base material layer 782.

[0091] The paper base material layer 782 will be described. The paper base material layer 782 is preferably paper that is rigid and does not easily crack when bent along a folding line or the like, but is not particularly limited, and can be appropriately selected and used according to the content filled in the paper container 90 with a chuck, taking into account water resistance (size degree) and the like. As a specific example, high-quality paper, cup base paper, milk carton base paper, etc. can be preferably used, and the basis weight is 80 g / m 2 or more, 320 g / m 2 The following range is appropriate.

[0092] The thermoplastic resin layer (sealant layer) used for the innermost layer, and if necessary, the outermost layer and the intermediate layer will be described. As the resin of the thermoplastic resin layer (sealant layer), in addition to low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE), medium-density polyethylene (MDPE), high-density polyethylene (HDPE), ethylene-α-olefin copolymer polymerized using a single-site catalyst, ethylene-vinyl acetate copolymer (EVA), ethylene-acrylic acid copolymer (EAA), random copolymer of ethylene-methacrylic acid (EMAA), ethylene-methyl acrylate copolymer (EMA), ethylene-ethyl acrylate copolymer (EEA), ionomer, and polypropylene and its copolymers, polyester-based resins, etc. can be used, and from these, suitable ones can be appropriately selected and used according to the content to be filled and the conditions of storage and use.

[0093] Among the above-mentioned thermoplastic resins, ethylene-methyl acrylate copolymer (EMA) and random copolymer of ethylene-methacrylic acid (EMAA) are particularly excellent in heat stability during processing such as extrusion coating, adhesiveness to various substrates, low-temperature heat sealability, etc., and also in film-forming properties. Therefore, it is easy to extrude and coat the outermost thermoplastic resin layer, which does not require a very thick thickness, for example, with a relatively thin thickness of 6 μm or more and 10 μm or less, and laminate it. At the same time, the usage ratio of plastic materials can be reduced, and cost advantages can also be obtained.

[0094] For the innermost layer, and the outermost layer and intermediate layer thermoplastic resin layers (sealant layers) as required above, after performing adhesion-promoting treatments such as anchor coating, corona treatment, frame (flame) treatment, etc. on their laminated surfaces as required, resin can be extruded and coated on them for lamination. In addition, the thermoplastic resin can be pre-made into a film, and the film can be laminated by known dry lamination or extrusion lamination (sandwich lamination), etc.

[0095] When laminating the barrier layer 785 on the intermediate layer of the laminated sheet 78, as the barrier layer 785, in addition to metal foils such as aluminum foil, metal or inorganic oxides such as aluminum, silica, and alumina can be used as vapor-deposited films vapor-deposited on base films such as biaxially stretched PET film, biaxially stretched nylon film (ONy film), biaxially stretched polypropylene film (OPP film), etc. with a thickness of 20 to 100 nm. Alternatively, saponified ethylene-vinyl acetate copolymer (hereinafter sometimes referred to as EVOH) film, biaxially stretched film of nylon MXD6, polyacrylonitrile film, and PET film, ONy film, OPP film, etc. provided with a coating layer of polyvinylidene chloride can be used.

[0096] Such a barrier layer 785 is usually preferably laminated on the inner surface of the paper base material layer 782 because its barrier property can be effectively utilized. However, when a metal foil such as aluminum or a metal vapor deposition film is used for the barrier layer 785, it can also be laminated on the outer surface of the paper base material layer 782 in order to utilize its metallic feeling in the design. The lamination of the barrier layer 785 can be easily performed by known dry lamination or extrusion lamination (sandwich lamination).

[0097] The layer configuration of the laminated sheet 78 of the blank plate 10 of the chuck-equipped paper container 90 of the present embodiment is illustrated. Cross-sectional views of the laminated sheet 78 are shown in FIGS. 9A, 9B, 9C, and 9D.

[0098] FIG. 9A is a cross-sectional view of the laminated sheet 78 of the blank plate 10 composed of three layers, and its layer configuration is as follows. " / " means the boundary between adjacent layers. (Outer surface) Outermost thermoplastic resin layer 781 / Paper base material layer 782 / Innermost thermoplastic resin layer 783 (inner surface)

[0099] FIG. 9B is a cross-sectional view of the laminated sheet 78 of the blank plate 10 composed of two layers, and its layer configuration is as follows. (Outer surface) Paper base material layer 782 / Innermost thermoplastic resin layer 783 (inner surface) It is a layer configuration obtained by excluding the outermost thermoplastic resin layer 781 from the blank plate 10 composed of three layers shown in FIG. 9A.

[0100] Further, when barrier properties (such as water vapor, oxygen, and aroma retention) are required for the blank plate 10, a barrier layer 785 can be provided. FIG. 9C is a cross-sectional view of the laminated sheet 78 of the blank plate 10 composed of five layers, and its layer configuration is as follows. (Outer surface) Outermost thermoplastic resin layer 781 / Paper base material layer 782 / Intermediate adhesive layer 784 / Barrier layer 785 / Innermost thermoplastic resin layer 783 (inner surface)

[0101] FIG. 9D is a cross-sectional view of the laminated sheet 78 of the four-layer blank plate 10, and its layer structure is as follows. (Outer surface side) Paper base material layer 782 / Intermediate adhesive layer 784 / Barrier layer 785 / Innermost thermoplastic resin layer 783 (Inner surface side) It is a layer structure obtained by excluding the outermost thermoplastic resin layer 781 from the five-layer blank plate 10 shown in FIG. 9C.

[0102] The joining between the layers of each of the above laminated sheets 78 is performed by known dry lamination, extrusion coating, adhesives, etc. Note that the layer for joining between the layers may not be shown because its thickness is thin.

[0103] <Manufacture of paper container with chuck> The following is an outline of the procedure until an intermediate-stage paper container with a chuck (in a flat state) 91 is manufactured from the blank plate 10 of the paper container with a chuck 90, then an intermediate-stage paper container with a chuck (in a boxed state) 92 is manufactured, and finally a package of the paper container with a chuck 90 filled with contents is completed.

[0104] <Manufacture of intermediate-stage paper container with chuck (in a flat state)> When the two above-mentioned blank plates 10 are overlapped, a chuck tape 61 in which a male chuck tape 61m and a female chuck tape 61f are pre-fitted is inserted at a position where the chuck tape joints 52 overlap each other, and the chuck tape joints 52 are heated, pressurized, and heat-sealed from the outer surface sides of the two blank plates 10.

[0105] Next, the inner surfaces of the easy-open seal portions 53 are heat-sealed to each other, and the inner surfaces of the seal margins 36 adjacent to the side edge portions 11 of the blank plate 10 are heat-sealed to each other. Then, the intermediate-stage paper container with a chuck (in a flat state) 91 is formed into a bag shape with the lower edge portion 26 open.

[0106] The paper container 90 with a chuck is not particularly limited in actual production, but in order to improve productivity, an apparatus may be used to perform the assembly of the paper container, the filling of the contents, and the sealing of each joint portion inline.

[0107] In that apparatus, a long printed laminated sheet 78 wound up in a roll form may be fed out, and in a form where the paper containers are connected horizontally, processing of folding lines, insertion and heat sealing of the chuck tape 61, heat sealing of the side edge seal margin 36, heat sealing of the easy-open seal portion 53, etc. may be performed. Note that as long as the desired paper container 90 with a chuck is obtained, the order of the above steps may be different.

[0108] Here, the shape of the upper overlapping plate 34 of the paper container 90 with a chuck of this embodiment and the shape of the top side plate 41 will be described with reference to FIG. 2. Side plates 41 of the top portion are continuously provided on both left and right sides of the upper overlapping plate 34. Here, these three forming plates are combined and referred to as the top flap 45. On the upper edge portion 21 of the top flap 45, an opening grip margin 57, an easy-open seal portion 53, and a chuck tape 61 are provided in sequence. Below the chuck tape 61, a first horizontal folding line 22 is located. Note that in the opening grip margin 57, one concave horizontal ruled line 551 is provided as an opening starting portion 55.

[0109] By the way, in the paper container (flat state) 91 with a chuck at an intermediate stage, enlarged cross-sectional views of the joint portion of the chuck tape 61, which is the portion where the chuck tape 61 and the blank plate 10 are joined, are shown in FIGS. 10A and 10B. The cutting location is shown at the cross-sectional position C-C in FIG. 2. Here, the blank plate 10 is exemplified by the four-layer laminated sheet 78 in FIG. 9D.

[0110] In Fig. 10A, a female chuck tape 61f is joined to the front blank plate 10b as the front chuck tape 61b. The female chuck tape 61f includes a female chuck tape body portion 62f joined to the blank plate 10 and a female chuck tape fitting portion 63f having a recess for fitting with the male chuck tape 61m. Also, a male chuck tape 61m is joined to the back blank plate 10a as the back chuck tape 61a. The male chuck tape 61m includes a male chuck tape body portion 62m joined to the blank plate 10 and a male chuck tape fitting portion 63m having a protrusion for fitting with the female chuck tape 61f.

[0111] In Fig. 10B, a male chuck tape 61m is joined to the front blank plate 10b as the front chuck tape 61b. The male chuck tape 61m includes a male chuck tape body portion 62m joined to the blank plate 10 and a male chuck tape fitting portion 63m having a protrusion for fitting with the female chuck tape 61f. Also, a female chuck tape 61f is joined to the back blank plate 10a as the back chuck tape 61a. The female chuck tape 61f includes a female chuck tape body portion 62f joined to the blank plate 10 and a female chuck tape fitting portion 63f having a recess for fitting with the male chuck tape 61m.

[0112] Whether the male chuck tape 61m or the female chuck tape 61f is joined to the front blank plate 10b is appropriately selected according to the required performance of the paper container 90 with chuck and the specifications of the manufacturing apparatus for the paper container 90 with chuck.

[0113] <Manufacture of the intermediate-stage paper container with chuck (in the state of starting to form a case)> A mandrel is inserted through the opening of the bottom 73 of this intermediate-stage paper container with chuck (in the planar state) 91, the upper superimposing plate 34 is left, and the top plate 33 on its underside is spread forward and backward by the first transverse folding line 22, and the upper superimposing plate 34 is erected upward.

[0114] Here, in order to surely perform the bending process of the ridge portion 72d of the body portion 72, an auxiliary member may be brought into contact with the inner side and / or the outer side of the body portion 72 in the vicinity (including contact) of the ridge portion 72d.

[0115] Below the upper overlapping plate 34, a chucked paper container (in the state of being lifted) 92 in an intermediate stage is formed in which the top portion 71 by the top plate 33 is followed by the body portion 72, and the bottom portion 73 is opened in a substantially rectangular shape. At this stage, as shown in FIG. 3, the upper overlapping plate 34 stands upright upward.

[0116] In the design, the shape of the horizontal cross-section of the body portion 72 and the shape of the opening of the bottom portion 73 are assumed to be rectangular, but since it is a chucked paper container 90 made of a laminated sheet 78 mainly composed of paper and having flexibility, it is substantially rectangular including cases where it does not become a perfect rectangular shape.

[0117] <Forming and Filling of Chucked Paper Container> Next, the upper overlapping plate 34 that stands upright upward is folded down on the back side (the side of the back top plate 33a), and the top portion side protruding portions 74 protruding to both the left and right sides are folded in the direction of the side plates 32 and joined to the body portion 72. At this time, the bent portion 76 of the top portion side protruding portion 74 is bent. At that time, in order to surely perform the bending process of the bent portion 76, an auxiliary member may be brought into contact with the inner side and / or the outer side of the top portion 71 in the vicinity (including contact) of the bent portion 76.

[0118] The method of joining the top portion side protruding portion 74 to the body portion 72 may be a method using an adhesive (such as hot melt), a method using an adhesive tape, a method of mechanically joining (engaging, using a joining tool), etc. Also, when a thermoplastic resin layer (sealant layer) is provided on the outermost layer of the blank plate 10, there is a method of heat-sealing the thermoplastic resin layer (sealant layer). The joining of the bottom portion side protruding portion described later also uses a similar method.

[0119] Incidentally, the tip of the top portion protruding portion 74 may be joined to the body portion 72 of the paper container 90 with a chuck. Also, a location other than the tip of the top portion protruding portion 74 may be joined to the body portion 72 of the paper container 90 with a chuck. In that case, the tip of the top portion protruding portion 74 does not have to be joined to the body portion 72 of the paper container 90 with a chuck.

[0120] With the bottom portion 73 of the intermediate-stage paper container 92 with a chuck (in the erected state) formed as described above facing upward, the contents are filled from the open bottom portion 73, and then the bottom portion 73 is bent, and the bottom margin seal margins 37 are heat-sealed in a clasp seal format.

[0121] Thereafter, the joined bottom margin seal margin 37 is bent and laid on the back side (the side of the back bottom plate 35a), and the bottom portion protruding portions protruding from both the left and right sides are bent and joined to the bottom plate 35, thereby completing the package of the paper container 90 with a chuck having a substantially rectangular parallelepiped shape.

[0122] FIG. 4 is a perspective view showing the paper container 90 with a chuck of this embodiment. FIG. 5 is a side view of the paper container 90 with a chuck shown in FIG. 4. FIG. 6 is a plan view of the paper container 90 with a chuck shown in FIG. 4.

[0123] The paper container 90 with a chuck shown in FIG. 4 has an outer shape formed in a substantially rectangular parallelepiped shape and includes a ridge portion 72d of its body portion 72. Note that since the paper container 90 with a chuck is made of a laminated sheet 78 mainly composed of paper and having flexibility, it does not become a perfect rectangular parallelepiped shape, so it is made to have a substantially rectangular parallelepiped shape.

[0124] <Opening operation for taking out the contents of the paper container with a chuck> The procedure until the top portion 71 of the completed package of the paper container 90 with the contents is opened to take out the contents will be described. First, the top-fold protruding portion 74 joined to the body portion 72 is peeled off. Then, when the top-fold protruding portion 74 is lifted upward, the side plates 41 on the top-fold side stand up, and accordingly, the upper overlapping plate 34 also stands up. And the side plates 41 on the top-fold side and the upper overlapping plate 34 form substantially the same plane. The side plates 41 on the top-fold side and the side plates 41 on the top-fold side that form substantially the same plane are combined and called the top-fold flap 45 as described before.

[0125] Then, the user pinches the unsealing grip portions 57 on both the front and back sides with fingers and expands the front blank plate 10b and the back blank plate 10a in the outer direction (front-back direction), thereby peeling off the easy-opening seal portion 53. And the initial unsealing of the paper container 90 with a chuck is performed.

[0126] Next, after the initial unsealing of the paper container 90 with a chuck, the chuck tape 61 is unsealed. Here, the region between the upper edge portion 21b on the front side and the front chuck tape 61b is defined as the front unsealing-after initial unsealing grip portion 571b. Also, the region between the upper edge portion 21a on the back side and the back chuck tape 61b is defined as the back unsealing-after initial unsealing grip portion 571a. The unsealing-after initial unsealing grip portion 571 includes the unsealing grip portion 57, the easy-opening seal portion 53, and the region between the chuck tape 61 and the easy-opening seal portion 53.

[0127] The user pinches the front and back unsealing-after initial unsealing grip portions 571 with fingers and expands the paper container 90 with a chuck in the outer direction (front-back direction). By doing so, the chuck tapes 61 provided on the upper overlapping plate 34 and the side plates 41 on both the left and right sides of the top portion are dissociated.

[0128] During the opening operation of this chuck tape 61, the ends of the chuck tapes 61 at the side edges 11 on both the left and right sides of the blank plate 10 open over substantially the entire width up to the side-edge seal margins 36. Note that the side-edge seal margins 36 do not peel off. As described above, when the male chuck tape 61m and the female chuck tape 61f of the chuck tape 61 are separated, the extraction opening 56 is formed. FIG. 8 shows a paper container 94 with a chuck whose top portion 71 is opened.

[0129] The operation of peeling the peelable seal portion 53 and the operation of separating the chuck tape 61 may be performed in one operation. Or, the operation of separating the chuck tape 61 may be performed after the operation of peeling the peelable seal portion 53 is completed.

[0130] <Opening start portion> The opening start portion 55 will be described. When the user opens the top portion 71 of the paper container 90 with a chuck containing the contents, first, the peelable seal portion 53 on the top portion 71 is peeled off to expose the chuck tape 61.

[0131] At that time, if an opening start gap 58 is formed between the front opening gripping margin 57b and the back opening gripping margin 57a, it becomes easier to insert a finger and the chuck tape 61 is more likely to be separated.

[0132] In this embodiment, as shown in FIG. 11A, a concave horizontal ruled line 551 that crosses between the left and right side edge portions 11, which is one aspect of the opening start portion 55, is illustrated. By providing the concave horizontal ruled line 551, which is concave when viewed from the outside of the paper container 90, on the upper side of the peelable seal portion 53, each opening gripping margin 57 between the upper edge portion 21 and the peelable seal portion 53 is deformed in a direction to open in the front-rear direction. Then, an opening start gap 58 is formed between the front opening gripping margin 57b and the back opening gripping margin 57a.

[0133] Also, one concave horizontal ruled line 551 is provided for each of the front opening gripping margin 57b and the back opening gripping margin 57a. Further, the concave horizontal ruled line 551 is provided at a position that does not overlap with the easily peelable processing portion 54. As will be described later, the opening start portion 55 including the concave horizontal ruled line 551 may or may not overlap with the easily peelable processing portion 54.

[0134] Figure 14 is a cross-sectional view taken along the cross-section position D-D shown in Figure 7. It is a cross-sectional view of the upper overlapping plate 34 of the chuck-equipped paper container 93 in which the top protruding portion 74 in this embodiment has caused a bulge.

[0135] On the outer opening gripping margin 57b located above the easy-open seal portion 53, an outer concave horizontal ruled line 551b is provided. Also, on the inner opening gripping margin 57a located above the easy-open seal portion 53, an inner concave horizontal ruled line 551a is provided. Due to the presence of the outer concave horizontal ruled line 551b, the outer opening gripping margin 57b in the region above the outer concave horizontal ruled line 551b is inclined in the outer direction. Also, due to the presence of the inner concave horizontal ruled line 551a, the inner opening gripping margin 57a in the region above the inner concave horizontal ruled line 551a is inclined in the inner direction.

[0136] Therefore, an opening start gap 58 is formed between the vicinity of the outer upper edge portion 21b of the outer opening gripping margin 57b and the vicinity of the inner upper edge portion 21a of the inner opening gripping margin 57a.

[0137] Figure 15A is an end view of the upper edge portion 21 when the chuck-equipped paper container 93 in which the top protruding portion 74 is caused, as shown in Figure 7, is viewed from above. It is viewed from the direction of arrow B shown in Figure 7. The opening start gap 58 described in Figure 14 is the same element as the opening start gap 58 shown in Figure 15A. Since a finger can be easily inserted into the above-mentioned opening start gap 58, the peeling of the easy-open seal portion 53 becomes easier.

[0138] The opening start gap 58 caused by either the outer concave horizontal ruled line 551b or the inner concave horizontal ruled line 551a also makes it easier to peel the easy-open seal portion 53. However, when the outer concave horizontal ruled line 551b and the inner concave horizontal ruled line 551a are in a position facing each other, a larger opening start gap 58 is formed, and it becomes even easier to peel the easy-open seal portion 53.

[0139] The opening start portion 55 is not limited to the concave horizontal ruled line 551, and may be a convex or concave vertical ruled line, a rectangular emboss, or the like described hereinafter. Further, since an opening start gap 58 is formed between the front-side opening gripping margin 57b and the back-side opening gripping margin 57a, if it is a means, for example, a spacer may be attached or hot melt may be applied.

[0140] Next, after the initial opening of the paper container 90 with a chuck, the chuck tape 61 is opened. As described above, the region between the front-side upper edge portion 21b and the front-side chuck tape 61b is defined as the front-side opening gripping margin 571b after the initial opening. Also, the region between the back-side upper edge portion 21a and the back-side chuck tape 61b is defined as the back-side opening gripping margin 571a after the initial opening. The opening gripping margin 571 after the initial opening includes the opening gripping margin 57, the easy-opening seal portion 53, and the region between the chuck tape 61a and the easy-opening seal portion 53.

[0141] The user grips the front and back opening gripping margins 571 after the initial opening with fingers and expands the paper container 90 with a chuck in the outward direction (front-rear direction). By doing so, the chuck tapes 61 provided on the upper overlapping plate 34 and the side plates 41 at the top of both left and right sides are disengaged.

[0142] During the opening operation of this chuck tape 61, the ends of the chuck tape 61 at the side edges 11 on both left and right sides of the blank plate 10 open over substantially the entire width up to the side edge seal margins 36. As described above, when the male chuck tape 61m and the female chuck tape 61f of the chuck tape 61 are disengaged, the take-out opening 56 is formed.

[0143] <The Second Aspect of the First Embodiment> FIG. 11B shows a paper container with a chuck (planar state) 91 at an intermediate stage of this aspect, and prepares the blank plate 10 of this aspect in the previous process. The blank plate 10 of this aspect is provided with an opening start portion 55. The opening start portion 55 is composed of a single concave horizontal ruled line 551 that crosses between the side edges 11 on both left and right sides, and there is a region that overlaps with the easily peelable processed portion 54.

[0144] Regarding the upper limit of the position of the concave horizontal ruled line 551, it is desirable that the distance between the upper edge portion 21 and the concave horizontal ruled line 551 is more than 1 mm. If the distance is less than 1 mm, it becomes difficult to form the ruled line. Regarding the lower limit of the position of the concave horizontal ruled line 551, it is desirable that the distance between the concave horizontal ruled line 551 and the easy-opening seal portion 53 is more than 1 mm. If the distance is less than 1 mm, the unevenness of the concave horizontal ruled line 551 may have an adverse effect on the seal of the easy-opening seal portion 53.

[0145] The shape of the blank plate 10 other than the position of the opening starting portion 55 is the same as that of the first aspect of the present embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are the same as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of the present embodiment.

[0146] The blank plate 10 of this aspect is assembled to produce a paper container 90 with a chuck. Then, a paper container 90 with a chuck filled with the contents is produced. After that, when the paper container 90 with a chuck filled with the contents is initially opened, it becomes a paper container 93 with a top surface protruding portion 74 being caused.

[0147] In the paper container 93 with a chuck in a state where the top surface protruding portion 74 is caused, an opening starting gap 58 is generated between the front opening gripping margin 57b and the back opening gripping margin 57a. And since a finger can be easily inserted into the opening starting gap 58, the peeling of the easy-opening seal portion 53 becomes easy. Therefore, the initial opening of the paper container 90 with a chuck becomes easy.

[0148] <The Third Aspect of the First Embodiment> FIG. 11C shows the paper container with a chuck (in a flat state) 91 at the intermediate stage of this aspect, and prepares the blank plate 10 of this aspect in the previous process. The blank plate 10 of this aspect is provided with an opening start portion 55. The opening start portion 55 is composed of two concave horizontal ruled lines 551 that cross between the side edges 11 on both the left and right sides, and one does not overlap with the easily peelable processed portion 54. The other one has an area that overlaps with the easily peelable processed portion 54. Then, the paper container 90 with a chuck is produced from the blank plate 10.

[0149] Regarding the upper limit of the position of the concave horizontal ruled line 551, it is desirable that the distance between the upper edge portion 21 and the concave horizontal ruled line 551 is more than 1 mm apart. If the distance is less than 1 mm, it becomes difficult to form the ruled line. Regarding the lower limit of the position of the concave horizontal ruled line 551, it is desirable that the distance between the concave horizontal ruled line 551 and the easy-opening seal portion 53 is more than 1 mm apart. If the distance is less than 1 mm, the unevenness of the concave horizontal ruled line 551 may adversely affect the seal of the easy-opening seal portion 53. Also, it is desirable that the interval between the two concave horizontal ruled lines 551 is 1 mm or more. If the interval is less than 1 mm, the two concave horizontal ruled lines 551 may interfere with each other, and there is a possibility that the ruled line cannot be formed sufficiently.

[0150] The shape of the blank plate 10 other than the opening start portion 55 is the same as that of the first aspect of this embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are the same as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of this embodiment.

[0151] The blank plate 10 of this aspect is assembled to produce the paper container 90 with a chuck. Then, the paper container 90 with a chuck filled with the contents is produced. After that, when the paper container 90 with a chuck filled with the contents is initially opened, it becomes the paper container 93 in a state where the top protruding portion 74 is caused.

[0152] In the paper container 93 with a chuck in a state where the top surface protruding portion 74 is caused, an opening start gap 58 is formed between the front surface opening gripping margin 57b and the back surface opening gripping margin 57a. And since a finger can be easily inserted into the opening start gap 58, the peeling of the easy-open seal portion 53 becomes easy. Therefore, the initial opening of the paper container 90 with a chuck becomes easy.

[0153] <The fourth aspect of the first embodiment> FIG. 11D shows a paper container with a chuck (flat state) 91 at an intermediate stage of this aspect, and prepares the blank plate 10 of this aspect in the previous process. The blank plate 10 of this aspect is provided with an opening start portion 55. The opening start portion 55 is at approximately the center of the lateral width of the paper container 90 with a chuck, and consists of a single short concave horizontal ruled line 551, and exists on the upper side of the easy-open seal portion 53.

[0154] The length of the concave horizontal ruled line 551 is desirably 10 mm or more so that a finger of a hand can easily catch, and may be about half or less of the lateral width of the body portion 72 of the paper container 90 with a chuck, and may be 50 mm or less. For this reason, since the length of the concave horizontal ruled line 551 does not become longer than necessary, the force required for processing the concave horizontal ruled line 551 does not increase.

[0155] The shape other than the opening start portion 55 is the same as that of the first aspect of this embodiment. Also, the shapes of the front surface blank plate 10b and the back surface blank plate 10a are the same as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of this embodiment.

[0156] The blank plate 10 of this aspect is assembled to produce a paper container 90 with a chuck. And a paper container 90 filled with the content is produced. Then, when the paper container 90 filled with the content is initially opened, it becomes a paper container 93 with a chuck in a state where the top surface protruding portion 74 is caused.

[0157] FIG. 15B is an end view of the upper edge portion 21 when looking from above at the paper container 93 with a chuck, in which the protruding portion 74 of the top portion is drawn in. Although FIG. 7 is not a drawing of this embodiment, it is a drawing similarly shown as seen from the direction of arrow B shown in FIG. 7 for reference. Since there is an opening starting gap 58, a finger can be easily inserted, facilitating the peeling of the easy-open seal portion 53.

[0158] <The first aspect of the second embodiment> FIG. 12A shows the paper container 91 with a chuck at an intermediate stage of this embodiment (flat state), and prepares the blank plate 10 of this embodiment in the previous process. The blank plate 10 of this embodiment is provided with an opening starting portion 55, and the opening starting portion 55 is at approximately the center in the lateral width of the paper container 90 with a chuck, and consists of two short concave vertical ruled lines 552.

[0159] The concave vertical ruled lines 552 are located in the region of the opening gripping margin 57 and extend from the upper edge portion 21 to the easy-open seal portion 53. The concave vertical ruled lines 552 do not necessarily have to reach the easy-open seal portion 53. Alternatively, they may overlap with the easy-open seal portion 53, but it is desirable that they do not exceed the easy-open seal portion 53. If the concave vertical ruled lines 552 cross beyond the easy-open seal portion 53, there is a risk of reducing the sealing performance of the easy-open seal portion 53.

[0160] The interval between the two concave vertical ruled lines 552 is 20 mm. The interval between the two concave vertical ruled lines 552 may be 10 mm or more and may be 50 mm or less. Alternatively, the concave vertical ruled lines 552 may be inside the position 10 mm away from the inner side direction of the second longitudinal folding line 13. By doing so, the folding of the second longitudinal folding line 13 is not inhibited.

[0161] The shape other than the opening starting portion 55 is the same as that of the first aspect of the first embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are the same as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of the first embodiment.

[0162] The blank plate 10 of this aspect is assembled to produce a paper container 90 with a chuck. Then, a paper container 90 with a chuck filled with the contents is produced. After that, when the paper container 90 with a chuck filled with the contents is initially opened, it becomes a paper container 93 with the top portion protruding portion 74 being caused.

[0163] FIG. 16A is an end view of the upper edge portion 21 when the paper container 93 with a chuck with the top portion protruding portion 74 being pulled in is viewed from above. Since there is an opening starting gap 58, a finger can be easily inserted, and it becomes easy to peel the easy-opening seal portion 53. Therefore, the initial opening of the paper container 90 with a chuck becomes easy. [[ID=Z10]]

[0164] <The second aspect of the second embodiment> FIG. 12B shows a paper container with a chuck (planar state) 91 at an intermediate stage of this aspect, and prepares the blank plate 10 of this aspect in the previous process. The blank plate 10 of this aspect is provided with an opening starting portion 55, and the opening starting portion 55 is at a substantially central portion of the lateral width of the paper container 90 with a chuck and consists of five short concave vertical ruled lines 552.

[0165] The concave vertical ruled lines 552 are located in the region of the opening gripping margin 57 and extend from the upper edge portion 21 to the easy-opening seal portion 53. The concave vertical ruled lines 552 do not have to reach the easy-opening seal portion 53. Alternatively, they may overlap the easy-opening seal portion 53, but it is desirable that they do not exceed the easy-opening seal portion 53. If the concave vertical ruled lines 552 cross over the easy-opening seal portion 53, there is a risk of reducing the sealing performance of the easy-opening seal portion 53.

[0166] The intervals between the five concave vertical ruled lines 552 are provided at equal intervals inside the horizontal width (the distance between the outermost concave vertical ruled lines 552 on the left and right) of 20 mm. In this embodiment, the interval is 5 mm. The above-mentioned horizontal width may be 10 mm or more and may be 50 mm or less. Alternatively, the concave vertical ruled lines 552 may be located inside a position 10 mm away from the inner side of the second vertical folding line 13. By doing so, the folding of the second vertical folding line 13 will not be hindered.

[0167] The shape other than the unsealing starting portion 55 is the same as that of the first aspect of the first embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are the same as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of the first embodiment.

[0168] The blank plate 10 of this embodiment is assembled to produce a paper container 90 with a chuck. Then, a paper container 90 with a chuck filled with the contents is produced. After that, when the paper container 90 with a chuck filled with the contents is initially unsealed, it becomes a paper container 93 with a top portion protruding portion 74 being caused.

[0169] FIG. 16B is an end view of the upper edge portion 21 when viewing the paper container 93 with a chuck in which the top portion protruding portion 74 is drawn in from above. Since there is an unsealing starting gap 58, a finger can be easily inserted, making it easier to peel the easy-to-open seal portion 53. Therefore, the initial unsealing of the paper container 90 with a chuck becomes easy.

[0170] <The First Aspect of the Third Embodiment> FIG. 13A shows a paper container with a chuck (in a planar state) 91 at an intermediate stage of this embodiment, and prepares a blank plate 10 of this embodiment in a previous process. The blank plate 10 of this embodiment is provided with an opening start portion 55, and the opening start portion 55 is located at approximately the center of the lateral width of the paper container 90 with a chuck, and is composed of a concave embossed portion 553. Note that the concave embossed portion 553 is concave when viewed from the outside of the paper container 90 with a chuck, and has a rectangular shape.

[0171] The concave embossed portion 553 is located in the region of the opening grip margin 57 and is in contact with the upper edge portion 21. The concave embossed portion 553 may not reach the easy-opening seal portion 53 and may be in the vicinity or may be in contact with the easy-opening seal portion 53. The size of the concave embossed portion 553 of this embodiment is 40 mm in lateral width and 2 mm in longitudinal width. Also, the lateral width of the concave embossed portion 553 may be 50 mm or less. By setting the size in this way, the force required for processing the concave embossed portion 553 does not increase.

[0172] The shape other than the opening start portion 55 is the same as that of the first aspect of the first embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are the same as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of the first embodiment.

[0173] The blank plate 10 of this embodiment is assembled to produce a paper container 90 with a chuck. Then, a paper container 90 with a chuck filled with contents is produced. After that, when the paper container 90 with a chuck filled with contents is initially opened, it becomes a paper container 93 with a projecting portion 74 at the top.

[0174] FIG. 17A is an end view of the upper edge portion 21 when the chuck-equipped paper container 93 with the protruding portion 74 of the top portion retracted is viewed from above. Since there is an opening start gap 58, a finger can be easily inserted, facilitating the peeling of the easy-open seal portion 53. Therefore, the initial opening of the chuck-equipped paper container 90 becomes easy.

[0175] <Second Aspect of the Third Embodiment> FIG. 13B shows the chuck-equipped paper container (flat state) 91 at an intermediate stage of this aspect, and the blank plate 10 of this aspect in the previous process is prepared. The blank plate 10 of this aspect is provided with an opening start portion 55, and the opening start portion 55 is located at approximately the center in the lateral width of the chuck-equipped paper container 90 and consists of a concave embossed portion 553 and two concave vertical ruled lines 552.

[0176] The concave embossed portion 553 is located in the area of the opening gripping margin 57 and is in contact with the upper edge portion 21. The concave embossed portion 553 may be in the vicinity without reaching the easy-open seal portion 53 or may be in contact with the easy-open seal portion 53. The size of the concave embossed portion 553 of this aspect is 20 mm in lateral width and 2 mm in vertical width.

[0177] The two concave vertical ruled lines 552 of this aspect are located in the area of the opening gripping margin 57 and are provided 5 mm apart on both the left and right sides of the concave embossed portion 553. Therefore, the interval between the two concave vertical ruled lines 552 is 30 mm. The concave vertical ruled line 552 extends from the upper edge portion 21 to the easy-open seal portion 53. The concave vertical ruled line 552 may not reach the easy-open seal portion 53. Alternatively, it may overlap with the easy-open seal portion 53, but it is preferably not to exceed the easy-open seal portion 53. If the concave vertical ruled line 552 crosses beyond the easy-open seal portion 53, there is a risk of reducing the sealing performance of the easy-open seal portion 53.

[0178] By combining the opening start portion 55 with the concave vertical ruled line 552 and the concave embossed portion 553, easy-openability is ensured, and furthermore, the diversity of the design is expressed.

[0179] The shape other than the opening starting portion 55 is the same as that of the first aspect of the first embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are similar as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of the first embodiment.

[0180] The blank plate 10 of this aspect is assembled to produce a paper container 90 with a chuck. And a paper container 90 filled with the contents is produced. Then, when the paper container 90 filled with the contents is initially opened, it becomes a paper container 93 with the top portion protruding portion 74 being caused.

[0181] FIG. 17B is an end view of the upper edge portion 21 when looking at the paper container 93 with a chuck in which the top portion protruding portion 74 is drawn in from above. Since there is an opening starting gap 58, a finger can be easily inserted, and it becomes easy to peel the easy - opening seal portion 53. Therefore, the initial opening of the paper container 90 with a chuck becomes easy.

[0182] <The first aspect of the fourth embodiment> In this aspect, the concave vertical ruled line 552 of the first aspect of the second embodiment is replaced with a convex vertical ruled line 555. That is, the concave vertical ruled line 552 shown in FIG. 12A is replaced with a convex vertical ruled line 555.

[0183] The shape of the blank plate 10 other than the opening starting portion 55 is the same as that of the first aspect of this embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are similar as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of the first embodiment.

[0184] 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.

[0185] 18A is an end view of the upper edge 21 of the resealable paper container 93 when viewed from above with the top protrusion 74 pulled up. The presence of the opening trigger gap 58 allows fingers to be easily inserted, facilitating peeling of the easy-open seal 53. This makes it easy to initially open the resealable paper container 90.

[0186] <Second aspect of the fourth embodiment> In this aspect, the concave vertical lines 552 of the second aspect of the second embodiment are replaced with convex vertical lines 555. That is, the concave vertical lines 552 shown in FIG.

[0187] 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 shapes of the front blank plate 10b and the back blank plate 10a are also the same as those of the first aspect of this embodiment, being line-symmetrical. 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.

[0188] 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.

[0189] 18B is an end view of the upper edge 21 of the resealable paper container 93 when viewed from above with the top protrusion 74 pulled up. The presence of the opening trigger gap 58 allows fingers to be easily inserted, facilitating peeling of the easy-open seal portion 53. This makes it easy to initially open the resealable paper container 90.

[0190] <First aspect of the fifth embodiment> In this aspect, the concave embossed portion 553 of the first aspect of the third embodiment is replaced with a convex embossed portion 556. That is, the concave embossed portion 553 shown in FIG.

[0191] 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 shapes of the front blank plate 10b and the back blank plate 10a are also the same as those of the first aspect of this embodiment, being line-symmetrical. 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.

[0192] 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.

[0193] 19A is an end view of the upper edge 21 of the resealable paper container 93 when viewed from above with the top protrusion 74 pulled up. The presence of the opening trigger gap 58 allows fingers to be easily inserted, facilitating peeling of the easy-open seal 53. This makes it easy to initially open the resealable paper container 90.

[0194] <Second aspect of the fifth embodiment> In this aspect, the concave vertical ruled line 552 in the second aspect of the third embodiment can be replaced by a convex vertical ruled line 555, and further, the concave embossed portion 553 can be replaced by a convex embossed portion 556. That is, the concave vertical ruled line 552 shown in FIG. 13B can be replaced by a convex vertical ruled line 555, and further, the concave embossed portion 553 can be replaced by a convex embossed portion 556.

[0195] The shape of the blank plate 10 other than the opening start portion 55 is the same as that in the first aspect of this embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are the same as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those in the first aspect of the first embodiment.

[0196] The blank plate 10 of this aspect is assembled to produce a paper container 90 with a chuck. Then, a paper container 90 with a chuck filled with the contents is produced. After that, when the paper container 90 with a chuck filled with the contents is initially opened, it becomes a paper container 93 with a top surface protruding portion 74 being caused.

[0197] FIG. 19B is an end view of the upper edge portion 21 when the paper container 93 with a chuck with the top surface protruding portion 74 being pulled in is viewed from above. Since there is an opening start gap 58, a finger can be easily inserted, and it becomes easy to peel the easy-opening seal portion 53. Therefore, the initial opening of the paper container 90 with a chuck becomes easy.

[0198] <The Third Aspect of the Fifth Embodiment> In this aspect, as shown in FIG. 13C, a convex embossed portion 556 is provided that is long in the width direction and the end portions on both the left and right sides are located in the vicinity of the side edge seal margin 36. Also, the convex embossed portion 556 is in contact with the upper edge portion 21 but not in contact with the easy-peeling processed portion 54. Note that the convex embossed portion 556 may be in contact with or overlap the easy-peeling processed portion 54.

[0199] The shape of the blank plate 10 other than the opening starting portion 55 is the same as that of the first aspect of the present embodiment. Also, the shapes of the front blank plate 10b and the back blank plate 10a are the same as line symmetry. The layer configuration of the laminated sheet 78 of the blank plate 10, the manufacturing method of the paper container 90 with a chuck, the filling method of the paper container 90 with a chuck, etc. are the same as those of the first aspect of the first embodiment.

[0200] The blank plate 10 of this aspect is assembled to produce a paper container 90 with a chuck. And a paper container 90 with a chuck filled with the contents is produced. Then, when the paper container 90 with a chuck filled with the contents is initially opened, it becomes a paper container 93 with a top portion protruding portion 74 caused.

[0201] FIG. 19C is an end view of the upper edge portion 21 when the paper container 93 with a chuck with the top portion protruding portion 74 drawn in is viewed from above. Since there is an opening starting gap 58, a finger can be easily inserted, and the peeling of the easy-opening seal portion 53 becomes easy. Therefore, the initial opening of the paper container 90 with a chuck becomes easy.

Example

[0202] Hereinafter, the embodiments of the present disclosure will be described more specifically with reference to examples.

[0203] <Example 1> In Example 1, a paper container 90 with a chuck shown in FIG. 4 was produced using the blank plates 10 of FIGS. 1A and 1B corresponding to the first aspect of the first embodiment.

[0204] Two blank plates 10 of FIGS. 1A and 1B were prepared, and their inner surfaces were aligned and overlapped. As shown in FIG. 2, the side edge portion seal margins 36 on both opposite sides were heat-sealed, and the easy-opening seal portion 53 was also heat-sealed. Also, the chuck tape 61 was heat-sealed. In this way, a paper container (flat state) 91 with a chuck at an intermediate stage where the bottom portion seal margin 37 is unsealed was produced.

[0205] The laminated sheet 78 of the blank plate 10 was configured as follows. Although a cross-sectional view of the laminated sheet 78 is shown in FIG. 9D, the printed layer such as a pattern and the easily peelable processed portion 54 are not shown. Note that " / " means the boundary between adjacent layers. (Outer surface side) Printed layer such as a pattern (gravure printing on the outer surface of the paper base material layer 782) / Paper base material layer 782 (base paper for liquid paper container 150 g / m 2 Nippon Paper Industries) / Intermediate adhesive layer 784 (EMAA 20 μm Mitsui Dow Chemical N0908N) / Barrier layer 785 (silica vapor-deposited PET 12 μm Dainippon Printing IB-PET-UBP) / Innermost thermoplastic resin layer 783 (LDPE 40 μm Nippon Polyethylene LC520) (Inner surface side)

[0206] The manufacturing method of the laminated sheet 78 will be described. First, the roll-shaped paper base material layer 782 was fed out, and a predetermined pattern or character was gravure-printed at a predetermined position and then wound up again in a roll shape.

[0207] In the next step, the roll-shaped paper base material layer 782 was fed out, and the barrier layer 785 (silica vapor-deposited PET 12 μm) was laminated on the inner surface side of the paper base material layer 782 by extrusion lamination (sandwich lamination) with the melted intermediate adhesive layer 784 (EMAA 20 μm) interposed therebetween.

[0208] Next, the innermost thermoplastic resin layer 783 (LDPE 40 μm) was formed on the opposite side (inner surface side) of the paper base material layer 782 of the barrier layer 785 by extrusion lamination and then wound up again in a roll shape.

[0209] In addition, in order to improve the bonding strength between each bonding layer, an anchor coat treatment, a corona treatment, a flame treatment (flame treatment), etc. may be performed as necessary. Alternatively, an ozone treatment or the like may be performed on the melted resin.

[0210] 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.

[0211] Next, the roll-shaped laminated sheet 78 is unwound and subjected to processes such as creasing and punching, thereby completing the blank plate 10.

[0212] 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.

[0213] 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.

[0214] In addition, an unsealing gripping margin 57 with a vertical length (in the short side direction) of 5 mm is provided at the upper overlapping plate 34 and the upper edge portion 21 of the side plate 41 of the top portion. An easy-opening seal portion 53 with a vertical length (in the short side direction) of 3 mm is provided below the unsealing gripping margin 57. The easy-opening seal portion 53 is sealed in the region of the easily peelable processing portion 54 except for the side edge seal margin 36 and the vicinity of the side edge seal margin 36.

[0215] In addition, one concave horizontal ruled line 551 is provided in the unsealing gripping margin 57 in parallel with the easy-opening seal portion 53 so as to cross the blank plate 10. The distance between the easy-opening seal portion 53 and the concave horizontal ruled line 551 was 2 mm. The reference position of the interval of the concave horizontal ruled line 551 is the central portion in the transverse direction of the ruled line, and the same applies to other ruled lines described later.

[0216] On the blank plate 10, the upper overlapping plate 34, the first horizontal bending line 22, the top plate 33, the second horizontal bending line 23, the wall plate 31, the third horizontal bending line 24, and the bottom plate 35 are provided in this order from the upper edge portion 21 downward.

[0217] In addition, side plates 41 of the top portion are provided outside both sides of the upper overlapping plate 34 via the second vertical bending line 13. Further, outside both sides of the top plate 33, top edge protrusion margins 38 are provided via the second vertical bending line 13. In addition, side plates 32 are provided outside both sides of the wall plate 31 via the second vertical bending line 13. Further, bottom edge protrusion margins 43 are provided outside both sides of the bottom plate 35 via the second vertical bending line 13.

[0218] In addition, below the easy-opening seal portion 53, a chuck tape 61 is heat-sealed in the direction crossing the top portion 71 on the inner surfaces of the upper overlapping plate 34 and the side plates 41 of the top portion. Here, the distance between the upper edge portion 21 and the chuck tape 61 was 18 mm. The distance between the chuck tape 61 and the first horizontal bending line 22 was 20 mm. As described above, the intermediate-stage chucked paper container (flat state) 91 was manufactured.

[0219] Next, the chucked paper container (flat state) 91 at this intermediate stage has a mandrel inserted through the opening of the unsealed bottom seal margin 37, leaving the upper overlapping plate 34, and the top plate 33 below it is spread front and back by the first horizontal folding line 22, and the upper overlapping plate 34 is erected upward. Below the upper overlapping plate 34, there is a top part 71 formed by the top plate 33, and further, a body part 72 with a substantially rectangular horizontal cross-section (a plane substantially parallel to the bottom surface) follows, and a chucked paper container (raised box state) 92 at the intermediate stage with a bottom part 73 opening in a substantially rectangular shape is formed. (See Fig. 3).

[0220] Then, the overlapped upper overlapping plate 34 is folded with the back top plate 33a facing inward. After that, the top part side protruding parts 74 continuously provided on both left and right sides of the top part 71 are joined to the body part 72. Hot melt was used for this joining. Also, the tip side of the top part side protruding part 74 is folded in the inner direction of the chucked paper container 90 (downward before folding the top part side protruding part 74), making it easier to join the top part side protruding part 74 and the body part 72.

[0221] When joining the top part side protruding part 74 to the body part 72, the angle formed by the top part 71 and the top part side protruding part 74 through the folding part 76 of the top part side protruding part 74 is made substantially a right angle.

[0222] The dimensions of the completed substantially rectangular parallelepiped-shaped paper container were formed such that the width was 95 mm, the height was 120 mm, and the depth was 80 mm. In the above manner, the chucked paper container 90 of this embodiment was manufactured.

[0223] <Example 2> In this embodiment, using the blank plate 10 provided with the concave horizontal ruled lines 551 described in Fig. 11B, which corresponds to the second aspect of the first embodiment, the chucked paper container 90 was manufactured. Similar concave horizontal ruled lines 551 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the manufacturing method of the chucked paper container 90, etc. were the same as in Example 1.

[0224] <Example 3> In this example, a paper container 90 with a chuck was manufactured using a blank plate 10 provided with concave horizontal ruled lines 551 shown in Fig. 11C, which corresponds to the third aspect of the first embodiment. Similar concave horizontal ruled lines 551 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the manufacturing method of the paper container 90 with a chuck, etc. were the same as those in Example 1.

[0225] <Example 4> In this example, a paper container 90 with a chuck was manufactured using a blank plate 10 provided with concave horizontal ruled lines 551 shown in Fig. 11D, which corresponds to the fourth aspect of the first embodiment. Similar concave horizontal ruled lines 551 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the manufacturing method of the paper container 90 with a chuck, etc. were the same as those in Example 1.

[0226] <Example 5> In this example, a paper container 90 with a chuck was manufactured using a blank plate 10 provided with concave vertical ruled lines 552 shown in Fig. 12A, which corresponds to the first aspect of the second embodiment. Similar concave vertical ruled lines 552 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the manufacturing method of the paper container 90 with a chuck, etc. were the same as those in Example 1.

[0227] <Example 6> In this example, a paper container 90 with a chuck was manufactured using a blank plate 10 provided with concave vertical ruled lines 552 shown in Fig. 12B, which corresponds to the second aspect of the second embodiment. Similar concave vertical ruled lines 552 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the manufacturing method of the paper container 90 with a chuck, etc. were the same as those in Example 1.

[0228] <Example 7> In this example, a paper container 90 with a chuck was produced using a blank plate 10 provided with a concave embossed portion 553 described in FIG. 13A, which corresponds to the first aspect of the third embodiment. Similar concave embossed portions 553 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the method for producing the paper container 90 with a chuck, etc. were the same as those in Example 1.

[0229] <Example 8> In this example, a paper container 90 with a chuck was produced using a blank plate 10 provided with a concave embossed portion 553 and a concave vertical ruled line 552 described in FIG. 13B, which corresponds to the second aspect of the third embodiment. Similar concave embossed portions 553 and concave vertical ruled lines 552 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the method for producing the paper container 90 with a chuck, etc. were the same as those in Example 1.

[0230] <Example 9> In this example, a paper container 90 with a chuck was produced using a blank plate 10 provided with a convex vertical ruled line 555 described in FIG. 12A, which corresponds to the first aspect of the fourth embodiment. Similar convex vertical ruled lines 555 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the method for producing the paper container 90 with a chuck, etc. were the same as those in Example 1.

[0231] <Example 10> In this example, a paper container 90 with a chuck was produced using a blank plate 10 provided with a convex vertical ruled line 555 described in FIG. 12B, which corresponds to the second aspect of the fourth embodiment. Similar convex vertical ruled lines 555 were provided on the front blank plate 10b and the back blank plate 10a. The layer configuration of the laminated sheet 78 of the other blank plates 10, the method for producing the paper container 90 with a chuck, etc. were the same as those in Example 1.

[0232] <Example 11> In this example, a resealable paper container 90 was produced using a blank plate 10 provided with a convex embossed portion 556 shown in FIG. 13A, which corresponds to the first aspect of the fifth embodiment. Similar convex embossed portions 556 were provided on the front blank plate 10b and the back blank plate 10a. The other layer configurations of the laminated sheet 78 of the blank plate 10 and the production method of the resealable paper container 90 were the same as in Example 1.

[0233] Example 12 In this example, a resealable paper container 90 was produced using a blank plate 10 having a convex embossed portion 556 and convex vertical lines 555 as shown in FIG. 13B, which corresponds to the second aspect of the fifth embodiment. Similar convex embossed portions 556 and convex vertical lines 555 were provided on the front blank plate 10b and the back blank plate 10a. The other layer structures of the laminated sheet 78 of the blank plate 10 and the method for producing the resealable paper container 90 were the same as in Example 1.

[0234] Example 13 In this example, a resealable paper container 90 was produced using a blank plate 10 provided with a convex embossed portion 556 shown in Fig. 13C, which corresponds to the third aspect of the fifth embodiment. Similar convex embossed portions 556 were provided on the front blank plate 10b and the back blank plate 10a. The other layer configurations of the laminated sheet 78 of the blank plate 10 and the production method of the resealable paper container 90 were the same as in Example 1.

[0235] <Comparative Example> In the comparative example, a resealable paper container 80 shown in Fig. 2 was produced using one blank plate 81 as shown in Fig. 1. 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.

[0236] <Evaluation> Fifty samples each of Examples 1 to 13 and Comparative Example were prepared and filled with snack foods.

[0237] In the samples of Examples 1 to 13, the user grasped with fingers the front opening gripping margin 57b between the upper front edge portion 21b and the easily tearable seal portion 53 on the front side, and the back opening gripping margin 57a between the upper back edge portion 21a and the easily tearable seal portion 53 on the back side, and expanded the outer side (front-rear direction) of the paper container 90 with a chuck.

[0238] At that time, since the user could sufficiently grasp the opening gripping margin 57, the easily tearable seal portion 53 could be easily peeled off, and the initial opening of the paper container 90 with a chuck could be performed.

[0239] After the initial opening of the paper container 90 with a chuck, the chuck tape 61 was opened. Here, the region between the upper front edge portion 21b and the front chuck tape 61b is the front opening gripping margin 571b after the initial front opening. Also, the region between the upper back edge portion 21a and the back chuck tape 61b is the back opening gripping margin 571a after the initial back opening. The user grasped the front and back opening gripping margins 571 with fingers and expanded the outer side (front-rear direction) of the paper container 90 with a chuck. By doing so, the chuck tape 61 provided on the upper overlapping plate 34 and the side plates 41 at the top portions on both the left and right sides could be easily dissociated.

[0240] In the paper container 80 with a chuck of the comparative example, by the notch 877 provided as the initial opening means on the side plate 841 at the top portion and the easily tearable processing line 851 provided on the upper overlapping plate 834 and the side plate 841 at the top portion, the portion including the intermediate horizontal bending line (half-fold line) 821 could be cut off and opened. Next, the user tried to grasp with fingers the front opening gripping margin 857b between the front easily tearable processing line 851b and the front chuck tape 861b, and the back opening gripping margin 857a between the back easily tearable processing line 851a and the back chuck tape 861a, and expand the outer side direction of the paper container 80 with a chuck.

[0241] In the comparative example of the paper container 80 with a zipper, since no opening hook is provided, there is no gap between the front opening grip portion 857b and the back opening grip portion 857a, or even if there is a gap, it is very small. It was not easy to insert fingers between the front opening grip part 857b and the back opening grip part 857a to open it, so that it was necessary to insert a fingernail or a flat tool between the front opening grip part 857b and the back opening grip part 857a to pry it open, and it sometimes took time to separate the zipper tape 861.

[0242] Furthermore, the packages of the resealable paper containers 90 of Examples 1 to 13 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.

[0243] 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.

[0244] Furthermore, after removing a portion of the contents, the packages of the resealable paper containers 90 of Examples 1 to 13 were easily resealed by reattaching the zipper tape 61. The remaining contents were then properly stored.

[0245] 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]

[0246] 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 folding virtual line 15 Top part protruding part folding line 17 Top part diagonal folding line 18 Bottom part diagonal folding line 21 Upper edge part 22 First horizontal folding line 23 Second horizontal folding line 24 Third horizontal folding line 25 Fourth horizontal folding line 26 Lower edge part 31 Wall panel 32 Side panel 33 Top panel 34 Upper overlapping plate 35 Bottom plate 36 Side edge part sealing allowance 37 Bottom part sealing allowance 38 Top part protruding part allowance 41 Top part side plate 43 Bottom part protruding part allowance 45 Top part flap 52 Chuck tape joint part 53 Easy-open seal part 54 Easy-peel processing part 55 Opening start part 551 Concave horizontal ruled line 552 Concave vertical ruled line 553 Concave embossed part 555 Convex vertical ruled line 556 Convex embossed part 56 Taking-out opening 57 Opening grip allowance 571 Opening grip allowance after initial opening 58 Opening start gap 61 Chuck tape 62 Chuck tape body part 63 Chuck tape fitting part 71 Top part of the paper container with a chuck 72 Body part of the paper container with a chuck 72d Ridge part of the body 73 Bottom part of the paper container with a chuck 74 Top part protruding part 76-day part protruding bent part 78 Laminated sheet 781 Outermost thermoplastic resin layer 782 Paper base material layer 783 Innermost thermoplastic resin layer 784 Intermediate adhesive layer 785 Barrier layer 80 Conventional paper container with a chuck 81 Blank plate 81a Back side blank plate 81b Front side blank plate 821 Intermediate horizontal folding line (half folding line) 831 Wall panel 834 Upper overlapping plate 841 Top side plate 851 Easy opening processing line 856 Take-out opening 857 Opening gripping margin 861 Chuck tape 871 Top part 872 Body part 874 Top part protruding part 877 Notch 90 Paper container with a chuck of the present disclosure 91 Paper container with a chuck at an intermediate stage of the present disclosure (flat state) 92 Paper container with a chuck at an intermediate stage of the present disclosure (boxed state) 93 Paper container with a chuck in a state where the top part protruding part is caused 94 Paper container with a chuck in a state where the top part is opened A Region of an enlarged view of a paper container with a chuck at an intermediate stage (boxed state) B End face of the upper edge part of a paper container with a chuck in a state where the top part protruding part is caused Observation direction (described by an arrow in the figure) C Cutting position of an enlarged cross-sectional view of the chuck tape joining part D Cutting position of a cross-sectional view of the upper overlapping plate 34 E First top part intersection point (intersection point of the first vertical folding line and the first horizontal folding line) F Second upper intersection point (intersection point of the second longitudinal folding line and the second transverse folding line) G First bottom intersection point (intersection point of the first longitudinal folding line and the fourth transverse folding line) H Second bottom intersection point (intersection point of the second longitudinal folding line and the third transverse folding 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-open seal portion located below the opening grip 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 one of the front blank plate or the back blank plate has an opening catch portion on the opening grip portion, The paper container with a zipper, wherein the opening hook portion is a ruled line.

2. 2. The paper container with a zipper according to claim 1, wherein both the front blank plate and the back blank plate are provided with opening tabs on the upper edge sides of the easy-open seal portions.

3. The resealable paper container according to claim 1 or 2, wherein the ruled line of the opening hook portion includes a ruled line that is concave when viewed from the outside of the resealable paper container.

4. The resealable paper container according to claim 1 or 2, wherein the ruled line of the opening hook portion includes a ruled line that is convex when viewed from the outside of the resealable paper container.

5. The resealable paper container according to claim 1 , wherein the opening hook includes a horizontal line extending in the horizontal direction of the resealable paper container.

6. The paper container with a zipper according to claim 5, wherein the opening hook includes two or more horizontal lines.

7. The resealable paper container according to claim 1 , wherein the opening tab includes a vertical line extending in the vertical direction of the resealable paper container.

8. The opening hook includes two or more vertical lines extending in the vertical direction of the resealable paper container, The resealable paper container according to claim 7, wherein the vertical lines are positioned in the horizontal direction of the resealable paper container.

9. 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-open seal portion located below the opening grip 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 one of the front blank plate or the back blank plate has an opening catch portion on the opening grip portion, The opening hook portion includes a concave embossed portion that is concave when viewed from the outside of the resealable paper container.

10. 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-open seal portion located below the opening grip 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 one of the front blank plate or the back blank plate has an opening catch portion on the opening grip portion, The unsealing starting portion is a paper container with a chuck that includes a convex embossed portion that is convex when viewed from the outside of the paper container with a chuck.

Images