JP4768118B2 - Reusable paper bag - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a reusable paper bag, and more particularly to a reusable paper bag in which a filling port of contents can be easily and strictly sealed when used again after being used once.
[0002]
[Prior art]
Conventionally, paper bags made of kraft paper used to transport feed, cement, grain, fertilizer, resin pellets, etc. (hereinafter referred to as “contents”) are pleated with both ends formed by stepping. A cylindrical body is the main component, and a resin-based hot-melt adhesive is applied to the staircase surface (hereinafter referred to as the "stepped surface of the mouth") at one end of the pleated tubular body that forms the mouth of the paper bag. In general, the other end portion of the shaped member is sealed according to a standard method and configured as a bottom closed portion.
[0003]
In order to facilitate the opening of the paper bag, the conventional paper bag as described above is filled with the contents and sealed in the mouth, and when the contents are taken out after being used for transportation or storage. Something that is devised is also known. As an example, there is one in which a unique device has been made in the bottom closing portion described above.
[0004]
Specifically, the structure of the bottom closing part is folded with the other end of the pleated tubular body so as to be wound a plurality of times, and is a cover paper with an opening tape having a length over the entire width so as to straddle the folded part. It is formed by enclosing, and bonding both ends of the pad to each wall surface of the pleated tubular body with an adhesive.
[0005]
According to such a paper bag, at the time of opening after filling the contents, the paper bag is turned upside down and the bottom closing part is turned up by lowering one end part which was the contents filling port, Pull up the opening tape attached to the inner surface of the paper to tear the paper, pull out the other end, which is the folded part of the pleated tubular body, from the inside, and then fold it back to make the opening is there.
[0006]
[Problems to be solved by the invention]
In recent years, there has been a demand for repeated use of products from the viewpoint of resource saving, and this type of paper bag is no longer an exception. However, the configuration of the conventional paper bag cannot be used repeatedly unless at least a part of it is reworked.
[0007]
That is, in the conventional paper bag, after the contents are filled, the hot melt adhesive applied to the stepped surface of the mouth is reactivated and then bent and firmly adhered to the wall surface of the pleated tubular body. Therefore, the only way to open this sealing mouth is to cut it with a blade, and if it is opened in that way, it is almost difficult to easily re-seal.
[0008]
In addition, in the case of the above-described easy-opening paper bag, the bottom closed portion is bent (wrapped) several times at the end, and the folded portion is surrounded and fixed by the backing paper, so the backing paper is torn and wound. It is also difficult to easily re-seal the opened part after opening the end part and opening it.
[0009]
The reason for this will be briefly explained. When reusing a simple paper bag used at home, in most cases, there is no need to worry about leakage of contents or reduction in volume. After performing a process such as forming a flap again using a scissors or the like so that it can be resealed, the contents can be put again and then the flap can be glued and sealed.
[0010]
However, when reusing paper bags for commercial use such as transportation and storage with feed, cement, grain, fertilizer, resin pellets, etc., reseal them strictly so as not to cause leakage. There is a need and the volume must not be reduced. For this purpose, the worker cannot rework the opening of the paper bag at the contents filling site, and if the paste is not applied precisely, it may cause leakage.
[0011]
Therefore, in order to be able to reuse this type of paper bag (use it twice), it is impossible to make a thorough preparation at the bag making factory, that is, design that can be reused. However, conventional paper bags do not have such a configuration because there is essentially no idea for reuse, and in most cases, they have been incinerated.
[0012]
An object of the present invention is to solve such a conventional problem, and a paper bag that has been used once can be reused easily without causing leakage and without changing its internal volume. It is to provide a usable paper bag.
[0013]
[Means for Solving the Problems]
The reusable paper bag of the present invention has one end of a pleated tubular body provided with a closing flap at each end, and the other end is closed so as to be a future opening. In the pleated paper bag as the bottom closing part, the pleated cylindrical shape that becomes the opening for closing the opening when the pleated paper bag is reused after opening the bottom closing part and taking out the contents. Resealing means using an adhesive as an element is provided in advance at the other end of the body, and the other end of the pleated tubular body provided with the resealing means is bent at least twice. When forming the bottom closed part by surrounding and fixing the part with a cover paper with an opening tape, the adhesive constituting the resealing means is in a non-adhered state, and when reusing the pleated paper bag Before filling the contents from the opening And the adhesive constituting the re-sealing means bondable state, by bending the opening mouth end is pleated paper bag to re-seal adhered to the wall surface of the pleated tubular body, the re-sealing means Aside from the above-described adhesive, there is provided an adhesive for adhering the backing paper with the opening tape to the wall surface of the pleated tubular body .
[0014]
The reusable paper bag according to the present invention is characterized in that the resealing means is provided over substantially the entire width of the other end of the pleated tubular body.
[0015]
The reusable paper bag of the present invention is characterized in that the resealing means is an adhesive layer covered with a release paper.
[0016]
Reusable paper bag of the invention is characterized in that the adhesive of the re-sealing means is a hot-melt adhesive.
[0017]
The reusable paper bag of the present invention is characterized in that the resealing means is provided on a surface of a closing flap at the other end of the pleated tubular body.
[0018]
In the reusable paper bag of the present invention, the resealing means is provided on a wall surface of the pleated tubular body on which the closing flap at the other end of the pleated tubular body is folded and overlapped. It is characterized by.
[0019]
In such a reusable paper bag, it is preferable to form the pleated cylindrical body in two layers. Of course, the pleated cylindrical body may be formed of two or more layers.
[0020]
The reusable paper bag according to the present invention is characterized in that the both end portions of the pleated tubular body are formed by stepping, and the stepped surfaces of the both end portions are respectively the flaps.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the reusable paper bag of the present invention will be described in more detail with respect to an embodiment shown in the drawings. FIG. 1 is a plan view schematically showing a reusable paper bag 10 (hereinafter simply referred to as “paper bag”) according to an embodiment of the present invention in a flat state, and FIG. 2 is a paper bag 10 shown in FIG. It is sectional drawing which shows typically a structure when cut | disconnecting along 2-2 line.
[0022]
FIG. 3 is a plan view showing the two-layer pleated tubular body 11 which is a basic component of the paper bag 10 according to this embodiment in a flat state. The pleated tubular body 11 is mainly formed from kraft paper, and both end portions are formed by stepping as shown in FIGS. 1 and 3, and the stepped surfaces of both end portions are formed completely symmetrically. That is, the stepped structure at both ends of the pleated tubular body 11 is substantially the same, but the directions of the stepped surfaces are contradictory.
[0023]
Since such a two-layered pleated tubular body 11 is already well known, its detailed description is omitted. The paper bag 10 according to this embodiment has the above-described two-layered pleated tubular body 11 as a basic constituent element, one end of which is a mouth 12 when the paper bag 10 is used for the first time, and the other end is closed. It is configured as a bottom closure 13.
[0024]
The mouth portion 12 of the paper bag 10 bends an imaginary transverse line located near the center substantially along the lowermost edge, that is, the outermost edge 14 of the stepped one end portion of the pleated tubular body 11. The planned line 15 is used, and the entire staircase cut end outside the planned bent line 15 is used as the flap 16 on the mouth side.
[0025]
An adhesive layer 18 is provided in a region where the flap 16 defined by the planned folding line 15 is folded along the planned folding line 15 and overlaps the wall surface 17a of the paper bag 10, and this adhesive layer is further provided. A release paper 19 is affixed to the surface of 18 (this release paper 19 is peeled off when the flap 16 is overlaid). The pressure-sensitive adhesive layer 18 and the release paper 19 for temporarily protecting the pressure-sensitive adhesive surface may be provided by cutting a commercially available double-sided adhesive tape having a predetermined width into a length having the same width as that of the wall surface 17a. it can.
[0026]
Next, the configuration of the bottom closing portion 13 in the paper bag 10 according to this embodiment will be described. As is clear from FIGS. 2 and 3, a part of the pleated portion 27 is folded into a V-shape on the other end step surface of the pleated tubular body 11, specifically on the step surface in the flat state. As shown in FIG. 3 and FIG. 4, the pressure-sensitive adhesive layer 28 is applied as a resealing means to the innermost layer wall surface that is hidden (the center side is up to a fold line 31 described later) The pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer 28 may be covered with a release paper 29 until in use so as to be in a non-adhesive state. As such a pressure-sensitive adhesive layer with release paper, a commercially available double-sided adhesive tape used for bonding the flap 16 on the mouth side can be used.
Further, instead of the pressure-sensitive adhesive layer 28 with release paper, a hot-melt adhesive 32 may be applied at the same position as the pressure-sensitive adhesive layer 28 as a resealing means.
[0027]
The step portion at the other end where the pressure-sensitive adhesive layer 28 with release paper or the hot melt adhesive 32 is arranged and fixed on the innermost layer wall surface of the pleated tubular body 11 is wound from the tip side. The bent portion 23 is formed by bending at least twice.
[0028]
After that, the bent portion 23 is surrounded by a cover paper 24 having a length over the entire width so as to straddle the folded portion 23, and both ends of the cover paper 24 are respectively attached to the wall surfaces 17 a and 17 b of the pleated tubular body 11. Bonded with an adhesive 25. In this way, the bottom closing portion 13 of the paper bag 10 is formed. A very thin and strong resin-made opening tape 26 is attached to the inner surface of the adhesive sheet 24 constituting the bottom closing portion 13 between both ends of the adhesive sheet 24 in the width direction.
[0029]
In this way, the bottom closing portion 13 is formed by folding the other end portion of the pleated tubular body 11 so as to be wound twice or more, and surrounding and fixing the bent portion 21 with the application paper 24, The bent portion 23 is not bonded with an adhesive or the like. Therefore, if the opening tape 26 is pulled up from the end portion to make a linear cut in the backing paper 24, and the folding portion 23 is pulled out from the inside of the backing paper 24 while returning to the original state, the end portion can be easily removed. Can be opened.
[0030]
Next, a method of using the paper bag 10 according to this embodiment configured as described above will be described. Now, assume that the mouth portion 12 which is one end portion of the paper bag 10 according to the present embodiment in the state shown in FIG. 1 is opened and a predetermined amount of content is filled in the paper bag 10. Thereafter, the release-side paper 19 covering the surface of the adhesive layer 18 provided on the mouth side wall surface 17a of the paper bag 10 is peeled off, and the flap 16 on the mouth side is bent to a line 15 Is folded and folded, and bonded.
[0031]
Thus, the paper bag 10 in which the mouth portion 12 is tightly sealed is used for a predetermined purpose such as transportation and storage. Next, when the contents filled in the paper bag 10 are taken out, the backing paper 24 is torn using the opening tape 26 with the bottom closing portion 13 up as described above, and the The bent portion 23 is folded back to the original state from the inside to form an opening, from which the contents are taken out. In FIG. 4, the paper bag 10 after the contents are taken out is shown in a flat state.
[0032]
After the bottom closure 13 is opened and all the contents are completely removed from the opening, when the paper bag 10 is reused, the opening is used as the opening for filling the next contents. Fill. Accordingly, the mouth part 12 is the mouth part 12 at the first (first) use, and the mouth closing part sealed by attaching the flap 16 on the mouth side to the wall surface 17a using the adhesive layer 18 after filling the contents. In the second use, it becomes the bottom closed part as it is.
[0033]
After filling the contents from the opening opening of the bottom closed portion 13, it can be bonded after the release paper 29 covering the adhesive surface of the adhesive layer 28 is peeled off or by applying heat to the hot melt adhesive 32 In the same manner as when the mouth portion 12 was sealed for the first time, the center along the lowermost edge 30 at the other end of the pleated tubular body 11 after the bottom closing portion 13 was opened. The staircase surface is bent with a transverse line passing the offset position as a fold line 31 and bonded to the opposing folded wall surface 17b of the paper bag 10.
[0034]
In this case, since the mouth closing part tightly sealed at the time of the first use is used as the bottom closing part as it is, there is no possibility of leakage of contents from any part of the mouth part and the bottom part. In addition, the packaging after filling the contents of this paper bag (the shape of the paper bag) when used for the second time is almost the same as the first time, so it is easy to stack on a pallet, etc. It can be easily transported by means.
[0035]
In addition, when this paper bag 10 is used for the second time, the remaining pieces of the backing paper 22 remaining after opening the bottom closing portion 13 which becomes the filling port of the contents are applied to the wall surfaces 17a and 17b of the pleated tubular body 11. It is also preferable to cleanly peel off the bonded portion so as not to break.
[0036]
Further, in the reusable paper bag according to this embodiment, the sealing means of the mouth portion that is initially filled with the contents was the pressure-sensitive adhesive layer 18 made of, for example, a double-sided adhesive tape provided on the wall surface 17a. Needless to say, as the mouth sealing means, a hot-melt adhesive may be applied to the stepped surface of the mouth as in the prior art.
[0037]
Furthermore, as is clear from FIGS. 2 and 3, the pressure-sensitive adhesive layer 28 or the hot-melt adhesive 32 can be applied to the innermost layer wall surface on the other end side of the pleated tubular body 11 as a resealing means. In addition, as shown by a shaded line in FIG. 5, the wall surface 17 b of the pleated tubular body 11 on which the closing flap at the other end of the pleated tubular body 11 is folded and overlapped by the folding line 31. Alternatively, the pressure-sensitive adhesive layer 28 or the hot-melt adhesive 32 can be applied.
[0038]
Finally, an example of the practical use of the reusable paper bag according to the present invention will be described by way of example. For example, a peanut growing farmer is in a reusable paper bag according to the present invention for self consumption. Is purchased. This farmer can transfer this brown rice to another container, or after it has been consumed, it can be filled with homemade peanuts as commodities from the opening through the procedure described above.
[0039]
Or, a flour mill can purchase and use raw wheat and put it into a reused paper bag according to the present invention. The same applies to powders and the like.
[0040]
【The invention's effect】
As described above, according to the reusable paper bag of the present invention, once used, the paper bag can be easily reused without causing leakage and changing the internal volume, which is extremely economical. Paper bags can be provided.
[Brief description of the drawings]
FIG. 1 is a schematic plan view of a reusable paper bag according to an embodiment of the present invention viewed in a flat state.
2 is a longitudinal cross-sectional view schematically showing a cross-sectional structure of the reusable paper bag according to the embodiment shown in FIG. 1 cut along line 2-2.
FIG. 3 is a schematic plan view showing a pleated tubular body, which is a basic component of the reusable paper bag according to the embodiment shown in FIG. 1, in a flat state.
FIG. 4 shows a reusable paper bag shown in FIG. 1 that is used for the first time after the bottom closing portion is opened, and the opening of the bottom closing portion is used as a content filling opening in the second use. It is a top view which shows this paper bag in the state in a flat state.
FIG. 5 shows that the reusable paper bag shown in FIG. 1 is used for the first time, then the bottom closure is opened, and the opening of the bottom closure is used as a filling port for the second use. It is a top view of the other Example which shows this paper bag in the state in a flat state.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Reusable paper bag 11 Cylinder 12 with pleats First opening part 13 Bottom part closing part 14 The lowermost edge 15 in the edge part at the mouth part side Folding line 16 Flap 17a on the mouth part side Reusable One wall surface 17b of the reusable paper bag The other wall surface 18 of the reusable paper bag Adhesive layer 19 Release paper 21 Outer layer end portion 22 on the other end side of the pleated tubular body Inner layer end portion 23 on the other end side of the pleated tubular body Folding part 24 Covering paper 25 Adhesive 26 Opening tape 27 Folding part 28 Adhesive layer 29 Release paper 30 Lowermost edge 31 at the end of the refill port side Folding line 32 Hot melt adhesive

Claims (8)

In the pleated paper bag with one end of a pleated tubular body provided with a closing flap at each end as a mouth and the other end closed as a future opening, and a bottom closure,
In order to close the opening when the pleated paper bag is reused after opening the bottom closing part and taking out the contents, an adhesive is attached to the other end of the pleated tubular body serving as the opening. A re-sealing means is provided in advance,
When the other end portion of the pleated tubular body provided with the resealing means is bent at least twice , and the bent portion is surrounded and fixed with a cover paper with an opening tape to form the bottom closed portion. The adhesive constituting the resealing means is in a non-adhered state, and when the pleated paper bag is reused, the adhesive constituting the resealing means is filled after filling the contents from the opening. It is a paper bag with pleats that can be bonded, folded at the end of the opening and pasted to the wall surface of the pleated tubular body, and resealed .
Separately from the adhesive constituting the resealing means, an adhesive that adheres the adhesive paper with the opening tape to the wall surface of the pleated tubular body is provided. Paper bag with folds. The reusable pleated paper bag according to claim 1, wherein the resealing means is provided over substantially the entire width of the other end of the pleated tubular body. The reusable pleated paper bag according to claim 1 or 2, wherein the resealing means is an adhesive layer covered with a release paper. The reusable pleated paper bag according to claim 1 or 2, wherein the adhesive of the resealing means is a hot melt adhesive. The reusable pleat according to any one of claims 1 to 4, wherein the resealing means is provided on a surface of a closing flap at the other end of the pleated tubular body. paper bag. 2. The resealing means is provided on a wall surface of the pleated tubular body on which the closing flap at the other end of the pleated tubular body is folded and overlapped. The reusable pleated paper bag according to any one of -4. The reusable pleated paper bag according to claim 1, wherein the pleated tubular body is formed of two layers. The reusable pleat according to any one of claims 1 to 7, wherein the both end portions of the tubular body with pleats are formed by step cutting, and the stepped surfaces of the both end portions are the flaps, respectively. With paper bag.

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