JP2004099092A - Multi-layered bag - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-layered bag which completely prevents a powder from leaking from a fundamental crease when forming the bottom, has no leakage of the powder due to other factors, and has no leakage of the powder also from an inlet when storing the powder. <P>SOLUTION: A paper tube made of a multi-layered papery material is folded flat. Folds are formed at both corners of an opening end of the tube. One of upper and lower sheets is opened to make a development. Creases are made on the upper and lower sheets to close the center opening on the development. One or more slits reaching the opening end are provided without contact with the creases located on the folds on an outer layer papyraceous material of the tube. The upper and lower sheets are folded along the creases and stuck. A decorative paper is further stuck over it, thereby narrowing an aperture as much as possible with freedom and flexibility applied to the outer layer paper material. If even a small amount of an adhesive enters the aperture and is hardened, the aperture is closed and even a fine powder does not leak. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a multi-layer bag of flour, buckwheat flour, corn starch and the like, and more specifically, enhances the strength of a filling port with a simple configuration, and devises so that the contents do not leak during transportation or storage after filling the contents. Related to a multilayer bag.
[0002]
[Prior art]
As a conventional multi-layer bag A, as shown in FIGS. 14 to 16, a paper tube a made of a multilayer paper-like material is flattened and folded at both corners of an opening end b of the paper tube a. d, and one of the upper paper e and the lower paper f is opened to form a development surface g, and the upper paper e and the lower paper f are moved along the folding line i so as to close the center opening h of the development surface g. It is known that the sheet is folded and bonded, and a decorative paper j is adhered and fixed thereon, thereby forming a bottom portion in the simplest shape.
[0003]
Further, as shown in FIG. 17, a filling port k of a cylindrical powder communicating with the inside and outside of the paper-like tube a is provided on the folded portion c side of the development surface g of the multilayer bag A in FIGS. k is extended outward, the upper paper e and the lower paper f of the development surface g are folded and bonded to the filling port k side at the folding line i parallel to the opening end b, and the makeup is further applied thereon. A multi-layer bag B is known in which a paper j is attached, an opening end b is closed, and an inner surface and an outer surface of a filling port k which is extended outward are coated with a heat-melting adhesive in advance (actually, a multi-layer bag B). See Japanese Patent Publication No. 50-20972). Then, after powder or the like is stored in the multilayer bag B from the filling port k, the filling port k is folded toward the decorative paper j side, and heated and pressed by a heater from above, thereby sealing the filling port k and applying a makeup. It is bonded and fixed to paper j to form the bottom.
[0004]
Further, as shown in FIGS. 18 and 19, a closing piece of paper l is attached to the end of the folded portion c of the development surface g of the multilayer bag A of FIGS. A cylindrical filling port k communicating with the inside and outside of the paper cylinder a is provided, the filling port k is slightly extended outward, and an inner patch m is attached to the development surface g to close the opening end b. A multi-layer bag C is known in which an upper paper e and a lower paper f of a development surface g are folded and attached to a filling port k side by a folding line i parallel to the opened end b (Japanese Patent Application Laid-Open No. H11-49184). Gazette). In this multilayer bag, after powder or the like is stored in the multilayer bag C from the filling port k, the filling port k is folded under the upper paper e and the lower paper f or folded into the filling port k and sealed. It constitutes the bottom.
[0005]
[Problems to be solved by the invention]
The above-mentioned multilayer bag A has a simple structure and is easy to manufacture, but powder easily leaks along the folding line i of the upper paper e and the lower paper f. As in recent years, the importance of improving the environment at the work site has been emphasized, and in a situation where a product manufactured in a clean environment forms a part of the quality of the product, the contents from the multilayer bag A to the contents are reduced. Leakage of certain powders is a problem that must be avoided.
[0006]
However, similarly to the multilayer bag A, the above-mentioned multilayer bag B also folds the upper paper e and the lower paper f of the development surface g to the filling port k side by a folding line i parallel to the opening end b, and furthermore Because the decorative paper j is attached to the, there is a problem that the powder easily leaks along the folding line i. In addition, between the decorative paper j and the folded portions c and d which are overlapped by the upper paper e and the lower paper f, and between the decorative paper j and the filling port k which is overlapped by the two papers. There is a concern that fine powder may leak from a small gap. Further, this multilayer bag B has the advantage that the structure is simple and easy to manufacture, but since the filling port k is extended outward, the worker may grab and pull by hand, and the filling port k is at the base. In addition, since the filling port k is merely a cylindrical body, the pressure directly leaks from the filling port k when storing the powder, the flow of the powder is reversed, and the powder flows backward from the filling port k. There is also a risk of leakage.
[0007]
Also, the powder packaging bag C, like the multi-layer bag A, easily leaks the powder along the folding line i. Further, since the filling port k which is two sheets is provided at the end of the folded portion c of the development surface g, a slight gap is formed between the inner patch m and the filling port k, and the gap is closed. The interposition of a piece of paper 1 can substantially prevent the leakage of fine powder, but this is still insufficient. Further, in the multilayer bag C, similarly to the multilayer bag B, the filling port k is a simple cylinder. Therefore, when the powder is stored, the powder may leak from the filling port k in the same manner.
[0008]
Therefore, an object of the present invention is to completely prevent leakage of powder transmitted through a fundamental bending line when forming the bottom of the bag, and to prevent powder from leaking due to other factors. An object of the present invention is to provide a multi-layer bag in which powder does not leak from the filling port when storing the powder even when the multi-layer bag has a filling port.
[0009]
[Means for Solving the Problems]
The present invention has been proposed to achieve the above object, and has the following configuration. That is,
ADVANTAGE OF THE INVENTION According to this invention, the paper cylinder made of a multilayer paper-like material is flatly folded, the folded part is formed in the both corners of the open end of the paper cylinder, and one of the upper paper and the lower paper is opened and developed. Surface, and folds the upper and lower sheets so as to close the opening at the center of the development surface, and at least one or more reaching the opening end in a state where the upper and lower sheets are not in contact with the fold located at the fold portion. Is provided on the paper-like material except for at least the innermost layer of the paper-like cylinder, and the upper paper and the lower paper are folded along the folding line and bonded to provide a multilayer bag. You.
[0010]
Further, according to the present invention, a valve sheet is attached in a cylindrical shape to one end of an inner patch that crosses both folded portions of the deployment surface and covers a central opening, and the peripheral edges of the inner patch and the valve sheet are spread out. The multi-layer bag is provided, wherein the multi-layer bag is attached to a surface to close an opening end of the paper tube and fill a gap between one end of the inner patch and the valve paper.
[0011]
Further, according to the present invention, there is provided the above-described multi-layer bag in which the upper paper and the lower paper are folded along the folding line and bonded, and then decorative paper is bonded.
[0012]
According to the present invention, there is provided the above-mentioned multilayer bag, wherein the decorative paper is provided with a cut tape.
[0013]
Further, according to the present invention, the folding line is parallel to the opening end inside the inner patch and the valve paper, and the upper paper and the lower paper are folded along the folding line and bonded, The above-mentioned multilayer bag to which decorative paper is attached is provided.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is a perspective view in which a part of a configuration state of a multilayer bag showing an embodiment of the present invention is cut away, and FIGS. 2 to 5 are plan views showing a manufacturing state of the multilayer bag showing an embodiment of the present invention. . In the figure, a multi-layer bag 1 folds a paper tube 2 made of a multilayer paper-like material 11 flat and forms folded portions 4 and 5 at both corners 3a and 3b of an opening end 3 of the paper tube 2. One of the upper paper 6 and the lower paper 6a is opened to form a development surface 7, and a folding line 9 is formed on the upper paper 6 and the lower paper 6a so as to close the central opening 8 of the development surface 7, At least one slit 10 reaching the opening end 3 is provided on at least the paper-like material 11 excluding the innermost layer of the paper-like cylinder 2 in a state where the upper and lower papers 6 and 5 are not in contact with the folding line 9 located at 5. The paper 6a is folded along the folding line 9 and stuck, and the decorative paper 12 is stuck thereon.
[0015]
The multilayer bag 1 folds a paper cylinder 12 made of a multilayer paper-like material 11 flat, and inserts folds 4 ′ and 5 ′ into both corners 3 a ′ and 3 b ′ of an open end 3 ′ of the paper cylinder 2. At the same time, the upper paper 6 'and the lower paper 6a' are provided with a fold 9 ', and one or more of the folds 4' and 5 'reach the open end 3 without contacting the folds 9' located at the folds 4 'and 5'. Is provided on at least the paper-like material 11 excluding the innermost layer of the paper-like cylinder 2, and the upper paper 6 'and the lower paper 6a' are folded along the folding line 9 'and stuck together, and the cut tape is further placed thereon. The decorative paper 12 'provided with 13 may be stuck.
[0016]
The paper cylinder 2 is selected from any one of diameter and length according to the purpose of use. In FIG. 1, a two-ply paper 11 having an outer paper 20 and an inner paper 21 is formed. Although it is used, it is not limited to this, and may be a multilayer of two or more layers. The material is not limited to kraft paper, but may be a resin sheet or a laminated sheet of paper and a resin sheet.
[0017]
As shown in FIG. 3, the paper tube 2 is flatly folded and folded along the crease line 22 to form triangular folds 4 and 5 at both corners 3a and 3b of the opening end portion 3, respectively. The upper paper 6 side of the cylinder 2 is opened to form a hexagonal development surface 7. Since the development surface 7 has the central opening 8, it is necessary to bend the upper paper 6 and the lower paper 6a toward the central opening 8 in order to close the opening. Therefore, the fold line 9 is attached to the upper paper 6 and the lower paper 6a, and the upper paper 6 and the lower paper 6a are folded along the fold line 9 and attached to at least the hatched portions 23 and 24 of the upper paper 6 and the lower paper 6a. The mixture 25 is applied and attached.
[0018]
As already described in the conventional example, when the content of the multilayer bag 1 is a powder, the fold 9 becomes a radius (R), and the powder leaks through the radius. One or more slits 10 reaching the open end 3 are provided in the outer layer paper 20 at the positions 4 and 5 in a state where the outer layer paper 20 is not in contact with the folding line 9.
[0019]
In FIG. 3, there are two slits 10 almost parallel to the outer side of the crease 9, but there is no particular limitation. As shown in FIG. Alternatively, there may be two, approximately four on each side of the crease 9, substantially parallel to each other. In short, the slit 10 reaching the open end 3 without contacting the fold 9 or the slit 10 'reaching the open end 3' without contacting the fold 9 ', or It suffices that there is a slit 10 that reaches the open end 3 without contacting the fold 9, and that the slit 10 reaches the open end 3 ′ without contact with the fold 9 ′.
The slit 10 or the slit 10 ′ or the slit 10 and the slit 10 ′ are provided only in the outer layer paper 20 because if the inner layer paper 21 is provided with these slits, the powder and the like stored in the inside Is leaked directly to the outside.
[0020]
Since the slit 10 reaches the open end 3 of the outer layer paper 20, the outer layer paper 20 on both sides of the open end 3 across the slit 10 has one free end. Therefore, since the outer layer paper 20 is a single sheet, it has a sufficient degree of freedom and the flexibility associated therewith. When the upper sheet 6 and the lower sheet 6a are folded and bonded, they are pressed to form one outer layer sheet. Due to the degree of freedom and flexibility of the object 20, the radius itself becomes infinitely narrow, and further, from the hatched portions 23 and 24 in FIG. 3, the patch 25 applied in a lattice shape shown in FIG. In other words, the powder stays in the passage 26 where the powder leaks, and is dried in that state to completely block the passage 26. Accordingly, the passage 26 can be completely closed by the combination of the degree of freedom or flexibility of the single outer layer paper 20 and the adhesive 25 due to the presence of the slit 10. In addition, as the above-mentioned adhesive, an adhesive such as polyvinyl alcohol, polyvinyl acetate, acrylic, rubber, or starch paste is appropriately used.
[0021]
After the central opening 8 of the development surface 7 is closed by the upper paper 6 and the lower paper 6a in this way, a decorative paper 12 is attached to protect the part and adjust the appearance, thereby obtaining a product.
[0022]
8 to 13 show a multi-layer bag according to another embodiment of the present invention. This multi-layer bag 1a is provided with a powder filling port 30 in the multi-layer bag 1 shown in FIGS. 1 to 7. Things.
That is, on the deployment surface 7 in the state of FIG. 3, the valve paper 32 is attached in a tubular shape to one end of the inner patch 31 that crosses both the folds 4 and 5 and covers the center opening 8, The peripheral edge of the valve paper 32 is adhered to the development surface 7 to close the opening end 3 of the paper tube 2 and the space between one end of the inner patch 31 and the valve paper 32 is the filling port 30 described above. In addition, the upper paper 6 and the lower paper 6a of the development surface 7 are folded and stuck to the center opening 8 side by a crease 9 parallel to the opening end 3 inside the inner patch 31 and the valve paper 32, and furthermore, The decorative paper 12 is adhered on top.
[0023]
That is, as shown in FIG. 9, the valve paper 32 is overlaid on the folded surface 5 side of the development surface 7. The valve paper 32 is shorter than the entire length and width of the inner patch 31, extends outward from one end of the inner patch 31, and is bonded to the inner patch 31 in a tubular shape. The hot-melt adhesive application section 33 is applied to the inner patch 31, and is located at a portion extending from one end of the inner patch 31 in FIG. The material of the valve paper 32 is selected to be the same as that of the paper tube 2 described above.
[0024]
As shown in FIG. 10, the inner patch 31 is overlaid on the development surface 7 and the valve paper 32. The inner patch 31 extends between the triangular folds 4 and 5 and covers the central opening 8. Then, the valve paper 32 is bonded at a hatched portion 34 shown in FIG. 10 to form a tubular shape. Then, the inner patch 31 and the valve paper 32 integrated in a cylindrical shape are bonded to the development surface 7 at the peripheral edge thereof, that is, the hatched portion 35 shown in FIG. At the same time, the space between one end of the inner patch 31 and the valve paper 32 is used as a powder filling port 30. Accordingly, since the valve paper 32 serves as a component of the filling port 30 and also serves as a closing paper piece 1 (see FIGS. 18 and 19) of the conventional multilayer bag C, leakage of fine powder is considerably prevented. Yes, but it's not perfect.
[0025]
For this reason, similarly to the embodiment shown in FIGS. 1 to 7, at least one slit 10 reaching the opening end 3 in a state where it does not come into contact with the bending line 9 located at the folds 4, 5 of the development surface 7. Is provided on the paper-like material 11 excluding at least the innermost layer of the paper-like cylinder 2, that is, one outer layer paper-like material 20. Therefore, when the upper paper 6 and the lower paper 6a are folded and bonded together, they are pressed, so that the degree of freedom and flexibility of one outer layer paper-like material 20 makes the radius itself narrow without limit, and further bonding. The agent 25 flows into the ares, that is, stays in the passage 26 where the powder leaks, and in this state, the agent 25 dries and completely blocks the passage 26.
[0026]
Therefore, due to the presence of the slit 10, the degree of freedom or flexibility of the single outer layer paper-like material 20 and the adhesive 25 can be combined to completely block the passage 26, and thereby the powder No body leaks. Then, one side of the decorative paper 12 is attached to the back surface of the lower paper 6a of the developing surface 7. The decorative paper 12 is provided with a hot-melt adhesive application section 36 so as to hit the hot-melt adhesive application section 33 when superimposed on the valve paper 32. After the powder is stored inside the multilayer bag 1a, The filling port 30 can be easily and completely sealed by a heater. In addition, as the material of the inner patch 31 and the decorative paper 12, the same material as that of the above-described paper tube 2 is selected.
[0027]
In addition, the above-described valve paper 32 is a free end because the end 32 a on the opposite side of the hot-melt adhesive application section 33 is not bonded to the development surface 7. Therefore, when the powder is to be leaked from the filling port 30 when the powder is stored in the multilayer bag 1 through the filling port 30, the end 32a of the valve paper 32 functions as a check valve, and the flow of the powder flows. And the powder is prevented from leaking from the filling port 30 to prevent the powder from adhering to the outside of the multilayer bag 1a.
[0028]
Further, first, the upper paper 6 of the development surface 7 is opened inside the inner patch 31 and the valve paper 32 on the inner patch 31 shown in FIG. A folding line 9 parallel to the end 3 folds the opening toward the central opening 8 and affixes it on the inner patch 31. Next, a lower sheet 6a is similarly folded on the center opening 8 side along the folding line 9 and attached on the upper sheet 6 (see FIG. 12). Further, the decorative paper 12 is pasted thereon to complete the product (see FIG. 13).
[0029]
Accordingly, in the state of FIG. 13, the multi-layer bag 1a is delivered to the customer as a multilayer bag 1a. After the customer stores the powder inside the multi-layer bag 1a, the decorative paper 12 is attached thereto, and the heating and melting of the valve paper 32 is performed by the heater. The hot melt adhesive application section 36 of the decorative paper 12 is pressed and heated to the adhesive application section 33, and the filling port 30 is completely sealed. In FIGS. 11 and 12, one side of the decorative paper 12 is bonded to the back surface of the lower paper 6a of the developing surface 7 in advance, but the multi-layer bag 1a and the decorative paper 12 of FIG. Then, all the subsequent work may be performed by the customer.
[0030]
As mentioned above, although embodiment of this invention was described, the specific structure is not limited to this, For example, you may apply the structure of this invention with respect to the multilayer bags B and C of a conventional example, It should be understood that modifications and combinations can be made without departing from the scope of the invention.
[0031]
【The invention's effect】
As described in detail above, according to the first aspect of the present invention, when the upper paper and the lower paper are folded along the folding line and bonded together, if there is one or more slits reaching the opening end without contacting the folding line. As a result of giving the paper-like material a high degree of freedom and flexibility, the gap becomes infinitely narrow, furthermore, even a little adhesive enters the gap, and when the adhesive solidifies in that state, the gap is closed, No leakage of fine powder. Therefore, it is possible to completely prevent the leakage of the powder transmitted through the fundamental bending line when forming the bottom of the multi-layered bag made of paper-like material, and that the product is manufactured in a clean environment. It has the effect of being a part of quality, matching the current situation.
[0032]
According to the second aspect of the present invention, in addition to the above effects, the filling port of the powder does not extend so long that it cannot be grasped and pulled by hand, so that the filling port is not broken and there is a filling port. Since there is no other gap in the structure, there is no leakage even with fine powder, and when storing the powder inside, the valve sheet acts as a check valve, There is an effect that powder does not leak.
[0033]
According to the third aspect of the present invention, in addition to the above effects, the upper and lower sheets of the development surface are folded at a folding line parallel to the opening end, and the decorative paper is further stuck thereon. No gap is generated in the structure, and leakage of fine powder is completely eliminated.
[0034]
Further, according to the invention of claim 4, in addition to the above-mentioned effects, an effect that the multilayer bag can be easily opened can be obtained.
[0035]
According to the fifth aspect of the present invention, in addition to the above-described effects, the upper and lower sheets of the development surface are folded inside the inner patch and the valve paper at a folding line parallel to the opening end, and further folded. Since the decorative paper is stuck on the upper side, no gap is generated more structurally, and leakage of fine powder is completely eliminated.
[Brief description of the drawings]
FIG. 1 is a partially cutaway perspective view showing a configuration of a multilayer bag according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a state in which a multilayer bag according to an embodiment of the present invention is manufactured.
FIG. 3 is a plan view showing a state in which a multilayer bag according to an embodiment of the present invention is manufactured.
FIG. 4 is a plan view showing a state in which the multilayer bag according to the embodiment of the present invention is manufactured.
FIG. 5 is a plan view showing a main part of the multilayer bag according to the embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a main part of the multilayer bag showing the embodiment of the present invention.
FIG. 7 is a plan view showing a state in which the multilayer bag according to the embodiment of the present invention is manufactured.
FIG. 8 is a partially cutaway perspective view showing a configuration of a multilayer bag according to another embodiment of the present invention.
FIG. 9 is a plan view showing a state in which a multilayer bag according to another embodiment of the present invention is manufactured.
FIG. 10 is a plan view showing a state in which a multilayer bag according to another embodiment of the present invention is manufactured.
FIG. 11 is a plan view showing a state in which a multilayer bag according to another embodiment of the present invention is manufactured.
FIG. 12 is a plan view showing a state in which a multilayer bag according to another embodiment of the present invention is manufactured.
FIG. 13 is a plan view showing a state of manufacturing a multilayer bag according to another embodiment of the present invention.
FIG. 14 is a perspective view showing a manufacturing state of a conventional example.
FIG. 15 is a plan view showing a manufacturing state of a conventional example.
FIG. 16 is a plan view showing a manufacturing state of a conventional example.
FIG. 17 is a plan view showing a manufacturing state of a conventional example.
FIG. 18 is a plan view showing a manufacturing state of a conventional example.
FIG. 19 is a plan view showing a manufacturing state of a conventional example.
[Explanation of symbols]
1, 1a Multi-layer bag 2 Paper cylinder 3, 3 'Open end 3a, 3a', 3b, 3b 'Corner 4, 4', 5, 5 'Folding part 6, 6' Top paper 6a, 6a ', 6b, 6b 'Base paper 7, 7' Deployment surface 8 Central opening 9, 9 ', 22, 22' Folding line 10, 10 'Slit 11 Paper-like material 12, 12' Decorative paper 13 Cut tape 20 Outer layer paper-like material 21 Inner layer Paper-like materials 23, 24, 34, 35 Shaded area 25 Laminate 26 Passage 30 Filling port 31 Interpatch 32 Valve paper 32 a End 33, 36 Heat-fused adhesive application section

Claims (5)

A paper cylinder made of a multi-layer paper-like material is flatly folded to form folding portions at both corners of the open end of the paper cylinder, and one of the upper paper and the lower paper is opened to form a development surface. A fold line is formed on the upper and lower sheets so as to close the center opening, and at least one slit that reaches the opening end in a state where the upper and lower sheets are not in contact with the fold line located at the fold portion is at least the A multilayer bag provided on the paper-like material excluding the innermost layer of a paper-like cylinder, and folding and bonding the upper paper and the lower paper along the folding line. A valve sheet is attached in a tubular shape to one end of an inner patch that crosses both folded portions of the deployment surface and covers the center opening, and a peripheral edge of the inner patch and the valve sheet is attached to the development surface to form the paper. The multilayer bag according to claim 1, wherein the opening end of the cylindrical tube is closed, and a space between one end of the inner patch and the valve paper is a filling port. The multi-layer bag according to claim 1, wherein the upper paper and the lower paper are folded along the folding line and bonded, and a decorative paper is bonded. The multilayer bag according to claim 3, wherein the decorative paper is provided with a cut tape. The folding line is parallel to the opening end inside the inner patch and the valve paper, the upper paper and the lower paper are folded along the folding line and bonded, and decorative paper is bonded. 2. The multilayer bag according to 2.

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