Patent Application
20150125097
The present invention relates to a gusset bag with a spout, and more particularly, to a gusset bag with a spout capable of ensuring stable self-standing performance regardless of remaining amount of an inner content remaining in a bag and easily pouring out the inner content completely regardless of the remaining amount of the inner content.
In conventional technology, there is known a gusset bag provided with a spout as a gusset-type bag formed of a film material such as polyester in which a spout is attached to an upper edge portion of the gusset-type bag. Patent Document 1 (Japanese Patent Laid-open Publication No. 2002-179102), as one example of such gusset-type bag, discloses a following gusset bag with a spout. Hereunder, this gusset bag provided with the spout is referred to as a conventional gusset bag A, which will be explained with reference to the accompanying drawing.
As shown in
The bag body 11 is formed from a pair of opposing flat surface portions 14, a pair of side surface portions 15 having side edge portions heat-sealed to side edge portions of the respective flat surface portions 14 so as to have a side surface gusset forming foldable lines (L1), and a bottom surface portion 16 formed to a lower edge portion of the bag body 11. The bottom surface portion 16 is formed in a manner in which lower portions of the paired flat surface portions, to which the side surface portions 15 are sealed, are folded inward each by a predetermined length.
The conventional gusset bag A, however, provides the following defects.
In a case when much inner content remains in the bag body 11, the bottom surface portion 16 can maintain a flatness to some extent because of self-weight of the inner content and ensure its self-standing performance, but when the amount of the remaining inner content reduces, it becomes difficult to maintain inwardly folded condition of the lower portions of the paired flat surface portions 14. As a result, it becomes impossible for the bottom surface portion to maintain its flatness and hence difficult to ensure the stable self-standing ability.
When the remaining amount of the inner content reduces, if the self-standing performance is not ensured, the following problem will be caused.
For example, the conventional gusset bag A is used as a soy-source bag, which is repeatedly used, the bog body 11 is liable to fall over according to reducing of the remaining amount of the soy-source and difficult to be used as soy-source bag, and in a certain case, there may cause a feat that the bag body 11 itself falls over and the soy-source flows outward.
Then, a gusset bag provided with a spout that solved the problem encountered in the conventional gusset bag A mentioned above has been proposed as one example that is disclosed in Patent Document 2 (Japanese Patent Laid-open Publication No. 2008-44641). Hereunder, this gusset bag is referred to as conventional gusset bag B, which will be explained with reference to the accompanying drawing.
As shown in
The bag body 21 is formed from a tubular body portion 23 and a bottom surface portion 24 heat-sealed to a lower edge portion of the tubular body portion 23. The tubular body portion 23 is composed of a pair of opposing flat surface portions 25 and a pair of side surface portions 26 heat-sealed to the side edge portions of the paired flat surface portions 25. The side surface portions 26 are formed with foldable lines (L2), respectively, for forming side surface gussets.
The bottom surface portion 24 has entire peripheral edge portion (margin) to be heat-sealed and secured to the flat surface portions 25 forming the tubular body portion 23 and the inner surface of the lower edge portions (margins) of the side surface portions 26. The bottom portion 24 is folded into a boat-shape to thereby form a bottom surface gusset of the bag body 21 (see
According to the conventional gusset bag B, by heat-sealing the bottom surface portion 24 to the lower edge portion of the tubular body portion 23, the bottom surface portion 24 can always maintain its flatness and hence ensure self-standing attitude regardless of remaining amount of the inner content.
The conventional gusset bag B, however, provides the following defects.
When it is required to pour out the inner content, the bag body 21 is inclined. However, if the remaining amount of the inner content is reduced, it is difficult to pour out the inner content as long as the bag body 21 is largely inclined because the spout 22 is attached to the central portion of the upper edge portion of the bog body 21, and accordingly, there is a fear that some amount of the inner content remains inside the bag body 21.
The above defect may be solved to some extent by attaching the spout 22 to a corner portion of the bag body 21.
Then, a gusset bag provided with a spout in which the spout is attached to the corner portion of the bag body is disclosed in Patent Document 3 (Japanese Design Patent Registration No. 584889). Hereunder, this gusset bag provided with the spout disclosed in this Document 3 is referred to as conventional gusset bag C, which will be explained with reference to the accompanying drawing.
As shown in
In the conventional gusset bag C, since the spout 43 is attached to the upper corner portion of the bag body 41, the inner content is easily taken out, but since any gusset is not formed to the side portion of the bag body 41, the self-standing ability of the bag body 41 becomes worse when the remaining amount of the inner content is reduced, thus being inconvenient.
Furthermore, another-type of a gusset bag provided with a spout to a corner portion of a bog body is disclosed in Patent Document 4 (Japanese Patent Laid-open Publication No. HEI 11-292105), and hereunder, this gusset bag will be referred to as a conventional gusset bag D and explained with reference to the drawings.
As shown in
According to the structure of the above conventional gusset bag D, the inner content can be easily taken out and the gusset bag D has an excellent self-standing performance. On the other hand, it is difficult to stock the bag D because of its wide width, and moreover, since the spout 54 is attached to the end seal portion of the bag body 53, it is difficult to completely pour out the inner content even if the bag body 53 is inclined and some amount of inner content remains inside the bag body 53, thus being inconvenient.
Patent Document 1: Japanese Patent Laid-open Publication No 2002-179102.
Patent Document 2: Japanese Patent Laid-open Publication No. 2008-44641.
Patent Document 3: Japanese Design Patent Registration No. 584889.
Patent Document 4: Japanese Patent Laid-open Publication No. HEI 11-292105.
As described above, for all the above-mentioned conventional gusset bags A to D, it is impossible to satisfy both features of insurance of stable self-standing performance or ability regardless of remaining amount of the inner content and ability of easily and completely pouring out the inner content with no residual.
Therefore, an object of the present invention is to provide a gusset bag provided with a spout capable of ensuring a stable self-standing performance or ability regardless of remaining amount of the inner content and ability of easily and completely pouring out the inner content with no residual.
In order to achieve the above object, the present invention is provided with the following characteristic features.
The invention defined in claim 1 provides a gusset bag provided with a spout comprising a bag body made of a film material and a spout attached to the bog body, the bag body being composed of a tubular body portion and a rectangular-shaped bottom surface portion sealed to one edge portion of the tubular body portion, wherein the tubular body portion is composed of a pair of opposing flat surface portions and a pair of side surface portions each of which is sealed to side edge portions of the flat surface portions, the bottom surface portion and the side surface portions are formed with foldable lines, respectively, along which the bottom surface portion and the side surface portions are folded inward toward inside of the bag body so as to form a bottom surface gusset and side surface gussets, and an inclining edge portion is formed to one of the upper two corner portions of the bag body, the spout being attached to the inclining edge portion.
The invention defined in claim 2 is characterized, in the invention claimed in claim 1, in that a portion to be opened is formed to an upper portion of one of the side surface portions to which the spout is attached.
The invention defined in claim 3 is characterized, in the gusset bag with the spout claimed in claim 1 or 2, in that the spout is attached at a right angle to the inclining edge portion of the bag body.
According to the present invention, the stable self-standing performance or ability regardless of an amount remaining in the bag body by sealing and securing the rectangular-shaped bottom surface portion to which the foldable line for forming the bottom gusset is formed to the lower edge portion of the tubular body portion forming the bag body. Moreover, since the inclining edge portion is formed to the bag body by obliquely cutting an upper corner portion of the bag body and the spout is attached to this inclining edge portion, so that the inner content can be easily completely poured out regardless of the remaining amount of the inner content. Furthermore, the high liquid-sealing performance can be achieved and ensured at the time when the spout is attached to the bag body by forming a portion to be opened to the upper portion of one of the side surface portions to which the spout is attached.
Hereunder, one embodiment of a gusset bag provided with a spout according to the present invention will be explained with reference to the accompanying drawings. It is to be noted that the gusset bag provided with a spout is referred to as “gusset bag E of the present invention” or merely “gusset bag E”.
As shown in
The bag body 1 is composed of a tubular body portion 3 and a bottom surface portion 4 secured to the lower edge portion of the tubular body portion 3 by means of heat-sealing. An inclined edge portion 1a is formed to an upper corner portion of the bag body 1 by cutting off an upper portion of the flat surface portions, which is explained hereinafter. It is further to be noted that the term “upper” for the bag body is used herein to a side to which a spout is attached and the term “lower” of the bag body is used herein to a side to which the bottom portion thereof is formed.
The tubular body portion 3 is formed with a pair of flat surface portions 5 and a pair of side surface portions 6 each of which are secured by means of heat-sealing between side edge portions of the flat surface portions 5. The heat-sealed portions between the flat surface portions 5 and the side surface portions 6 are denoted by adding character (W1) in
Each of the flat surface portion 5 has a vertically elongated rectangular shape having an upper edge portion including two corner portions, and one of these two corner portions is cut off in an oblique direction so as to inclining edge portion 1a. Each of the side surface portions 6 is formed with a vertically extending foldable (folded) line (L3) at a central portion in the thickness direction. By enabling the side surface portions 6 to be folded inward of the bag body 1 along the foldable lines (L3), side surface gussets are formed in both side portions of the bag body 1.
The bottom surface portion 4 has a rectangular shape having a longitudinal dimension equal to a width dimension of the flat surface portion 5, and the width dimension of the bottom portion 4 is equal to the width dimension of the side surface portion 6. An entire peripheral edge portion of the bottom surface portion 4 is sealed and secured to the inner surface portions of the lower edge portions of the flat surface portions 5 and the side surface portions 6 forming the tubular body portion 3 by means of heat-sealing. As shown in
The spout 2 is composed, as shown in
Next, function of the opening portion 6b (portion to be opened) will be explained with reference to the accompanying drawings.
More specifically, the upper end portion of one side surface portion 6, which will be cut with inclination, is folded inward before cutting it and attaching the spout 2, and as shown in
As mentioned above, after one end side of the upper edge portion of the tubular body portion 3 is cut with inclination, the spout 2 is then attached to the bag body 1 in a manner sandwiched between a pair of the inclined flat surface portions 5 and at substantially right angle with the cut inclined surface, and the paired flat surface portions 5 are then heat-sealed. The heat-sealed portion of the spout 2 is formed as the attachment portion 9 (see
In the structure where any opening portion 6b is not formed, one of the flat surface portion 5 (back side on the drawing) as shown in
On the other hand, as shown in
Another method of not forming an overlapped portion is shown in
As mentioned above, the formation of the opening portion 6b makes it possible to attain a function of attaching the spout 2 to the predetermined position without making large the bag body 1 while keeping good liquid-tight performance.
Hereunder, a securing (i.e., sealing) method of the bottom surface portion 4 to the tubular body portion 3 will be explained.
First, as shown in
Another method of securing the bottom surface portion 4 to the lower edge portion of the tubular bag body 3 will be explained hereunder also with reference to the drawing.
First, as shown in
Next, structure and material of the bag body 1 will be explained.
The bag body 1 may be formed of a lamination of at least a base material layer and a heat-sealed layer (i.e., sealant layer), in which the sealant layer constitutes the most inside layer contacting the inner content.
It is preferred for the base material layer to be formed of a film excellent in printability, and having good strength against lunge, high tension strength, and high impact resistance. As a material of the base material layer, there will be listed up, for example, polyethylene terephthalate, polypropylene, polyamide, ethylene vinyl alcohol copolymer, or like, and a biaxially oriented film or uniaxially oriented film of these material will be more preferred. Further, in order to endow a barrier performance to these films against oxygen, water vapor (moisture) or like, it may be preferred to use a metal such as aluminum, magnesium or like, an evaporated film evaporated with oxide such as silicon oxide or like, or a coated film coated with a coating agent having barrier performance such as polyvinylidene chloride. As the base material layer, a single element of the above-mentioned films or a laminated one thereof may be used. It is preferred that the base material layer has a thickness of 6 to 50 μm, and more preferably, of 9 to 30 μm.
The heat-sealed layer is a layer capable of being heat-sealed. As a material of such heat-sealed layer, for example, high-density polyethylene, low-density polyethylene, linear low-density polyethylene, polypropylene or like resins may be used, and non-oriented film of these materials or a multi-layered film formed by co-extruding such resin materials in combination may be preferably used. It is also preferable for the heat-sealed layer to have a thickness of 10 to 200 μm, and more preferably of 20 to 100 μm.
The laminated film may be provided with an intermediate layer between the base material layer and the heat-sealed layer as occasion demands.
Such intermediate layer may be formed of, for example, a film provided with functions or performances such as oxygen barrier property, moisture barrier property, tear property and the like. As a material for such intermediate layer, metal foil such as aluminum, above-mentioned evaporated film, coated film or films having various functions may be adopted. Two intermediate layers may be provided as occasion demands, and it is preferable for the intermediate layer to have a thickness of 6 to 50 μm, and more preferably, of 9 to 30 μm.
The laminated film formed of the base material layer and the sealant layer, and if needed, the intermediate layer, may be manufactured by securing them by known methods such as dry-laminate method using securing and/or sealing agent, extruding laminate method using thermally adhesive agent, and the like.
Further, it may be preferred for the above-mentioned spout 2 to be formed of material like or similar kind of heat-sealed (sealant) layer.
As explained hereinbefore, according to the present invention, the following effects and advantages will be achieved.
(1) The bag body 1 can ensure stable self-standing ability regardless of the remaining amount of the inner content by sealing and securing the rectangular bottom surface portion 4 formed with the foldable line for forming the bottom gusset to the lower edge portion of the tubular body portion 3.
(2) The inner content can be easily poured out regardless of the remaining amount of the inner content, without largely inclining the bag body 1, by forming the inclining edge portion 1a to one of the upper two corner portions of the bag body 1 and attaching the spout to the inclining edge portion 1a.
(3) The spout 2 can be attached to a predetermined position with the good liquid-tight performance by forming the opening portion 6b to the side surface portion 6 of the bag body 1 without making the bog body large.
(4) The inner content can be more easily and completely poured out regardless of the remaining amount of the residual inner content, without largely inclining the bag body 1, by forming the slit 7b to the lower portion of the spout body 7 that is inserted into the bag body 1 according to the synergetic effect with the above effect (2) in which the spout 2 is attached to the inclining edge portion 1a of the bag body 1.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2012-108744 | May 2012 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2013/063015 | 5/9/2013 | WO | 00 |
