JP2001039452A - Multi-layer paper bag preventing powder leakage and power blowoff even when it is filled with contents, and method for manufacturing same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent powder from leaking and flowing out of a rear surface of a bottom label at a blow port side and of the blow port in a multi-layer paper bag having a blow port side bottom adhering section. SOLUTION: There is provided a multi-layer paper bag in which a first score folding section x, a second score folding section y and a slant score folding section z are folded at a first score 12, a second score 13 and a slant score 11 and a blown side bottom adhering section A is formed. A vertical slit 7 is cut at the second score folding section y to form a vertical folding-back section 7a and a valve paper 4 is overlapped on the lower surface of the overlapped sections of the second score folding sections y, y. A blow port 3 is formed among the first score folding sections x, x and the slant score folding section z. A hot melt hm4 is coated on the surface of the valve paper 4 at the side of the blow port 3. After filling contents in the multi-layer paper bag 1, the hot melt hm6 of the bottom label 6 and the hot melt hm4 of the valve paper 4 are thermally pressed to the surface of the blow port 3 of the valve paper 4, thereby both inside and outside of the blow port 3 are double sealed. Accordingly, the content is filled to enable power leakage and blowoff of powder can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom-attached multilayer bag with a blow-out port for heavy packaging.

[0002]

2. Description of the Related Art As shown in FIGS. 13 to 17 of Japanese Utility Model Publication No. Hei 1-2666000, a conventional bottom-attached multilayer bag with a blowing port of this type of packaging bag has a valve paper directly adhered to the bottom bonding portion of the blowing port. Therefore, the thickness of the blow-out portion has a multilayer thickness.

[0003] For this reason, when rolling is performed by a roller for attaching decorative paper, there is a problem that the pressure of the roller does not reach the valve paper, and the adhesive between the valve paper and the decorative paper is not sufficient. As a result, the powder may leak from the blowing port and cause dusting.

[0004]

To prevent dust from leaking from the back surface of the decorative paper 6 on the side of the mouth and the blow-in port 3 in the multilayer paper bag having the bottom sticking portion A on the side of the blow-out side.

[0005]

[Technical Means of the First Invention] The first streaks 12, the second streaks 13, and the diagonal streaks 11 are used to form a first fold portion x, a second fold portion y,
In the multilayer paper bag in which the oblique streak folded portion z is folded to form the blow-side bottom sticking portion A,

The vertical knife 7 is cut into one oblique line on one side of the second stitch folding part y to form a vertical knife return part 7a.
The valve paper 4 is overlapped on the lower surface of the overlapping portion of the second folded line portions y, y to form a blow port 3 between the first folded line portion x and the oblique folded line portion z. Apply hot melt hm4 to the side surface,

On the other hand, a hot melt hm6 is applied to the front end of the blow-off port 3 on the back surface of the blow-off side decorative paper 6, and the hot melts hm4, hm6 of the valve paper 4 and the blow-off side decorative paper 6 are applied to the upper and lower surfaces of the blow-up port. A multilayer paper bag which is heat-bonded to DOWN and the inside and outside of the blow-in port 3 are double-sealed with hot melts hm4 and hm6, and the inside of the blow-out port 3 is filled with contents to prevent powder leakage and dusting.

[0008]

[Technical Means of the Second Invention] The first streaks 12, the second streaks 13, and the diagonal streaks 11 are used to form a first bent portion x, a second bent portion y,
Using a multi-layered paper bag in which the oblique stitch fold portion z is folded and the blowing port side bottom sticking portion A is formed,

In the multilayer paper bag, the second folded portion y
Is cut into a vertical knife 7 so as to form a vertical knife folded part 7a, a valve paper 4 is superimposed on the lower surface of the overlapping part of the second muscle folded parts y, y, and a first muscle folded part x, x, an oblique muscle folded part z, The hot melt hm4 is applied to the surface of the valve paper 4 on the side of the blow port 3 while the blow port 3 is formed.

The multilayer paper bag 1 is filled with contents, and the front and rear surfaces (FRONT, BACK) and the upper and lower surfaces (UP, DOW) are filled.
N), after making a rectangular bag consisting of side (SIDE),

The decorative paper 6 on the blow-in side is placed on the upper and lower surfaces (U
P, DOWN), and heat-presses the decorative paper 6 to hot-press the hot melt hm6 of the decorative paper 6 and the hot melt hm4 of the valve paper 4 on the inside and outside of the blow-out port 3 to thereby heat the blow-off port 3.
Double sealing inside and outside, filling contents, powder leakage,
A method for manufacturing a multilayer paper bag that prevents dusting.

[0012]

When the decorative paper 6 on the side of the mouth is adhered, the overlapping portion with the valve paper 4 is formed thin at the folded part 7a of the vertical knife, so that the hot melt 4 of the paper 4 and the decorative paper 6 on the side of the mouth 6 are bonded. In the portion where the hot melt hm6 overlaps, the heat pressure of the heat roller is good and is transmitted to the valve paper 4.

Therefore, the hot melt hm6 of the blow-off side decorative paper 6 and the hot melt hm4 of the valve paper 4 are well bonded, and the blow-off port 3 can be reliably sealed.

[0014]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Will be described. FIG. 1 is a perspective view showing a process of sealing the paper bag of the present invention, and FIG.
FIG. 3 is a plan view in which the second stitch fold y of the blow port side bottom sticking portion A is expanded, and FIG. 4 is each fold line 1 in the tubular body o.
1, 12, and 13, the vertical knife 7, and glued portions C, C of the bottom stuck portions A, B are shown.

FIG. 5 is a plan view when a bottom sticking portion is formed in the tubular body, and FIG. 6 shows the positions of the glued portions 14 and c and the valve paper 4 in FIG. FIG. 7 is a plan view when one of the second muscle folding portions y is folded,

FIG. 8 is a plan view showing a state where both of the second folds y are folded. 9 is a back view of the opening-side decorative paper 5, FIG. 10 is a back view of the blow-off side decorative paper 6, and FIG.
(C) shows the folding process of the sheet 4 and the front and back surfaces. FIG. 12 shows a state of the bottom sticking portion A before the content is filled in the paper bag. FIG. 13 shows the state of the upper and lower surfaces (UP, DOWN) on the side of the blow-in port after filling the contents. FIG. 14 shows a perspective view of the paper bag after the contents are filled. FIG. 15 shows the state of the upper and lower surfaces on the blowing side in FIG.

1 to 15, 1: paper bag, 1i: inner layer, 1o: outer layer, 2: opening port, 3:
Blow-out port, 4: Valve paper, 5: Opening side decorative paper, 6: Blow-up side decorative paper, 7: Vertical mess, 7a: Vertical mess folded portion, 1
1: Diagonal streak, 12: First streak, 13: Second streak, A: Blow-side bottom sticking part, B: Opening-side bottom sticking part, C: Glue, UP, D
OWN: Top and bottom, SIDE: Side, FRONT, BAC
K: front and rear surfaces, x: first bent part, y: second bent part, z: diagonal bent part, o: tubular body, hm4: hot melt, hm6: hot melt, t: opening tape,

The multilayer paper bag of the present invention comprises a first line 12 and a second line 1.
3. In the multilayer paper bag in which the first streak folded portion x, the second streak folded portion y, and the oblique streak folded portion z are folded by the oblique streaks 11 to form the blow-side bottom stuck portion A,

A vertical knife 7 is cut into one oblique line on one side of the second folded part y to form a vertical female folded part 7a.
The valve paper 4 is overlapped on the lower surface of the overlapping portion of the second folded line portions y, y to form a blow port 3 between the first folded line portion x and the oblique folded line portion z. Apply hot melt hm4 to the side surface,

On the other hand, a hot melt hm6 is applied to the front end portion of the blow-off port 3 side on the back surface of the blow-off port side decorative paper 6, and after filling the contents,
The decorative paper 6 is brought into contact with the upper and lower surfaces (UP, DOWN), and the hot melt hm4 and the hot melt hm6 of the valve paper 4 close the blowing port 3 with a hot-press roller.

That is, in the paper bag of the present invention, when forming the blowing port 3 between the valve paper 4 and the first fold portions x, x and the oblique fold portion z, the vertical knife 7 is attached to the second fold portion y. Cut in. Then, the cut portion is folded back to form a vertical female folded portion 7a. Further, the leading end portion of the valve paper 4 is overlapped with the second folded portion y and the vertical folded portion 7a to form the blowing port 3.

Therefore, the paper bag 1 of the present invention is attached to the upper and lower surfaces (UP, DOWN) of the blowing port side by a hot-press roller when the decorative paper 6 is bonded to the upper and lower surfaces (UP, DOWN) of the blowing port side. Heat bonded to part A.

At this time, the vertical female folded portion 7a is cut into one oblique line portion of the second stitch folded portion y, and the cut portion is folded back. Since the vertical folded portion 7a having a small thickness is interposed therebetween, the pressure and heat of the hot-press roller are well transmitted to the valve paper 4.

Next, when the paper bag 1 of the present invention is filled with contents and presents a rectangular shape having upper and lower surfaces (UP, DOWN), side surfaces (SIDE), and front and rear surfaces (FRONT, BACK) as shown in FIG. Now, FIGS. 13, 14, and 15 will be described. When the contents are filled, the paper bag shown in FIGS. 1 to 12 has a rectangular shape as shown in FIG. FIG.
(A) shows the upper and lower surfaces (U
P, DOWN). FIG. 13B shows a cross section taken along line 13b-13b of FIG.

FIG. 15 shows 15a-15a of FIG.
15b to 15b and 15c to 15c show cross sections. The outlet side decorative paper 6 is heated and pressed by the upper and lower surfaces (UP, DOWN) on the side of the outlet. That is, the paper bag of the present invention is located inside the front end of the decorative paper 6 in the state of FIG.
In FIG. 13b, the hot melt hm6 of the decorative paper 6 extends to the position of the side surface (SIDE), and maintains the double seal state together with the hot melt hm4 of the valve paper 4 even during filling of the contents.

[Brief description of the drawings]

FIG. 1 is a perspective view of a process of sealing a paper bag of the present invention,

FIG. 2 shows a process of attaching the blow-off side decorative paper 6;

FIG. 3 is a plan view in which a second fold-in portion y of the blowing-port-side bottom sticking portion A is expanded.

FIG. 4 shows positions of a fold line 11, a vertical knife 7, and glues C on the cylindrical body o.

FIG. 5 is a plan view of the cylindrical body o at the time of folding the first streak;

FIG. 6 shows the positions of the glues C and C and the position of the valve paper 4 in the bottom attachment portions A and B in FIG.

FIG. 7 is a plan view showing a state where one of the second stitches y is folded.

FIG. 8 is a plan view when both of the second muscle folding portions y are folded,

FIG. 9 is a back view of the opening-side decorative paper 5;

FIG. 10 is a back view of the blowing side decorative paper 6,

FIG. 11 (a) shows a process of folding the valve paper 4; (B) The side opposite to the blowing port side before folding of the valve paper 4 is shown. (C) Also shows a surface on the side of the air inlet.

12A is a plan view of a blow-side bottom sticking portion A, FIG. 12B is a cross-sectional view taken along line 12b-12b of FIG.

13A is a plan view of the top surface (UP) of the paper bag after filling the contents, and FIG. 13B is a cross-sectional view taken along the line 13b-13b in FIG. 13A.

FIG. 14 is a perspective view of the same,

15 (a) is a sectional view taken along line 15a-15a in FIG. 13a, (b) is a sectional view taken along line 15b-15b in FIG. 13a, (c) is a sectional view taken along line 15c-15c in FIG. 13a,

[Explanation of symbols]

1: paper bag, 1i: inner layer, 1o: outer layer, 2: opening port, 3:
Blow-out port, 4: Valve paper, 5: Opening side decorative paper, 6: Blow-up side decorative paper, 7: Vertical mess, 7a: Vertical mess folded portion, 1
1: Diagonal streak, 12: First streak, 13: Second streak, A: Blow-side bottom sticking part, B: Opening-side bottom sticking part, C: Glue, UP, D
OWN: Top and bottom, SIDE: Side, FRONT, BAC
K: front and rear surfaces, x: first bent part, y: second bent part, z: diagonal bent part, o: cylindrical body, hm4: hot melt, hm6: hot melt, t: opening tape.

 ──────────────────────────────────────────────────続 き Continuation of the front page (71) Applicant 591035771 Meito Co., Ltd. 17-2, Koami-cho, Nihonbashi, Chuo-ku, Tokyo (72) Inventor Kimio Oishi 25-25, Kandanishikicho, Chiyoda-ku, Tokyo Nisshin Flour Milling Co., Ltd. (72) Inventor Kazuaki Kosaka 2-9-1 Shinkawa, Chuo-ku, Tokyo Ishikawa Co., Ltd. (72) Inventor Yoshiji Kubota 61, Yodabashi 61 Fuji, Shizuoka Prefecture Inside the company (72) Inventor Takahiko Arita 2-1-2 Uchikanda, Chiyoda-ku, Tokyo Japan-made bag Co., Ltd. (72) Inventor Nobuo Kayano 17-2, Nihonbashi-Koami-cho, Chuo-ku, Tokyo Meito Co., Ltd.

Claims (2)

[Claims] 1. A first fold part x, a second fold part y, and a diagonal fold part z are folded by a first streak 12, a second streak 13, and a diagonal streak 11, thereby forming a blow-side bottom stuck part A. In the multi-layered paper bag, the vertical knife 7 is cut into one side oblique line portion of the second stripe folding part y to form a vertical knife folding part 7a, and the valve paper 4 is placed on the lower surface of the overlapping part of the second stripe folding part y, y. A blowing port 3 is formed between the first folded part x and the diagonal folded part z, and a hot melt hm4 is applied to the surface of the valve paper 4 on the side of the blowing port 3, while the decorative paper 6 on one side is formed. A hot melt hm6 is applied to the tip of the blow port 3 on the back side of the hot melt hm4, hm4 of the valve paper 4 and the decorative paper 6 of the blow port.
6 is a multi-layer paper bag in which the inside and outside of the blowing port 3 are double-sealed by applying heat and pressure, and the contents are filled to prevent powder leakage and dusting. 2. The first streak 12, the second streak 13, and the diagonal streak 11 are used to fold the first streak folded portion x, the second streak folded portion y, and the oblique streak folded portion z to form the blow-in port side bottom sticking portion A. In the multilayer paper bag, a vertical scalpel 7 is provided on the second folded part y.
To form a vertical female folded portion 7a, and overlap the valve paper 4 on the lower surface of the overlapping portion of the second folded portion y,
The multilayer paper bag is formed by forming a blowing port 3 between the first bent part x, x and the diagonal bent part z, and applying a hot melt hm4 to the surface of the valve paper 4 on the side of the blowing port 3. 1 and the front and rear (FRO)
NT, BACK), upper and lower surfaces (UP, DOWN) and side surfaces (SIDE), and then make the blow-off side decorative paper 6 into the blow-up side upper and lower surfaces (UP, DOWN).
N), the inside and outside of the blow-out port 3 are heated and pressurized to hot-press the hot melt hm6 of the decorative paper 6 and the hot melt hm4 of the valve paper 4 so that the inside and outside of the blow-in port 3 are heated and compressed. A method of manufacturing a multi-layer paper bag that is double sealed and filled with contents to prevent powder leakage and dusting.