JP2001301769A - Liquid agent bag - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid agent bag from which a sealed liquid agent is hard to leak even when a large impact acts. SOLUTION: The liquid bag sealing an ink (a liquid agent) is formed of a first sheet material 107 forming a back section and a belly section and a second sheet material 113 forming side sections, and the edges of the first material 107 and the second material 113 are heat fusion bonded (bonded) so that the second sheet material 113 is formed into a gusset in the longitudinal direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid medicine bag in which a liquid medicine is sealed.

[0002]

2. Description of the Related Art For example, when an ink-jet printer is used for textile printing, a large-sized image is formed, so that ink cartridges of each color contain ink having a capacity that can withstand unmanned work at night.

FIG. 14 is a view for explaining an example of an ink bag of an ink cartridge used in such an ink jet printer for textile printing. In the ink bag 1, the ink containing portion 3 in which the ink is sealed is formed by thermally fusing the edges (hatched portions in the drawing) of each side of two laminated sheet materials having a multilayer structure.

[0006] On one surface of the ink containing section 3, there is provided a liquid introducing section 5 for guiding the ink sealed in the ink containing section 3 to the outside. The ink sealed in the conventional ink bag is degassed to prevent oxidation.

[0005] As shown in FIG.
1 and the ink cartridge 13. Then, a needle 13 having a hollow structure provided on the ink jet printer side is stabbed into the liquid introduction unit 5, and the ink in the ink bag 1 is supplied to the ink jet printer via the needle 13.

[0006] Further, as shown in FIG.
Ink bags 31 are also proposed in which ink storage units 3 and 3 are laminated, a hole 21 is opened near the center of the contact surface, and the periphery of the hole 21 is heat-sealed.

[0007]

In the ink cartridge having the above structure, when a large impact acts during transportation,
There may be a case where the strength of the ink bag 1 is weak, that is, the heat-sealed portions A and B in the longitudinal direction of the ink bag 1 shown in FIG. 14 are peeled off and the sealed ink leaks.

In the case of the ink bag 31 having the shape shown in FIG. 16, there are the following problems. FIG. 16 (a)
16 is an enlarged view of the heat-sealed portion X around the hole 21 of FIG.
As shown in (b), the front surface and the back surface of the sheet material 41 having a multilayer structure are heat-sealed.
On the back surface, a layer made of a material having good chemical resistance and heat fusion property such as the PE layer 43 is required, and the structure of the layer is limited.

Further, since the cut surface Y of the sheet material 41 comes into contact with a liquid material such as ink, there is a problem that delamination of the sheet material 41 easily occurs. The present invention has been made in view of the above problems, and a first object of the present invention is to provide a liquid medicine bag in which a sealed liquid medicine is hard to leak even when a large impact acts.

Another object of the present invention is to provide a liquid material bag in which, when the sheet material has a multi-layer structure, the layer structure is flexible and delamination does not occur.

[0011]

According to a first aspect of the present invention, there is provided a liquid medicine bag in which a liquid medicine is sealed.
The first and second sheet materials are formed as a back and abdomen and a pair of second sheet materials as side portions, and the first sheet material is formed as a longitudinal gore. And a liquid material bag in which edges of the second material are joined.

By joining the edges of the first material and the second material so that the second sheet material becomes a gore in the longitudinal direction, four joints are formed in the longitudinal direction. Is done.

That is, the number of joints in the longitudinal direction is twice as large as that of a conventional liquid medicine bag. Therefore, even if a large impact acts on the liquid medicine bag, the impact force acting on each joint is dispersed and smaller than that of the conventional liquid medicine bag, so that the longitudinal joint is not peeled off and sealed. The liquid material is less likely to leak.

In the case where the first and second sheet materials have a multilayer structure and the joining is performed by heat fusion, it is sufficient that only one surface of the sheet is a layer suitable for chemical resistance and heat fusion. Therefore, the degree of freedom of the layer configuration of the sheet material is improved.

Further, at this time, since the cut surface of the sheet does not come into contact with the liquid agent, delamination of the sheet material does not occur. According to a second aspect of the present invention, there is provided a liquid material bag according to the first aspect of the present invention, wherein an edge of the first sheet material and the second sheet material is joined in a longitudinal direction.

When an impact force acts on the joint by folding back the joint in the longitudinal direction, the joint acts first in the direction of releasing the folding. Then, as the folded back is released and the state becomes the same as that of the conventional liquid medicine bag, it acts in the direction of peeling the joint in the longitudinal direction.

[0017] Therefore, the energy of the impact force is consumed in the direction of releasing the turn-back first, so that the energy for peeling off the joint in the longitudinal direction is small, and the sealed liquid agent is hard to leak.

The folding direction includes, but is not limited to, abdomen, back, side, and the like. According to a third aspect of the present invention, there is provided a liquid medicine bag in which a liquid medicine is sealed, wherein a seamless tubular sheet material is joined up and down.

Since the upper and lower portions of the seamless tubular sheet material are joined together, there is no weak point in the longitudinal direction, so that even if a large impact acts on the liquid material bag, the sealed liquid material is sealed. Is less likely to leak.

When joining the upper and lower portions of a seamless tubular sheet material, the tubular sheet material may be directly joined or may be joined via another sheet. Further, in claims 1 to 3, the term “joining” refers to heat fusion, ultrasonic fusion,
There are, but not limited to, adhesion, pasting by tape or the like.

According to a fourth aspect of the present invention, in the liquid medicine bag in which the liquid medicine is enclosed, the edges of the two sheet materials are joined, and the joint in the longitudinal direction is folded back. It is.

When an impact force is applied to the joint by folding the joint in the longitudinal direction, the joint acts first in the direction to release the joint. Then, as the folded back is released and the state becomes the same as that of the conventional liquid medicine bag, it acts in the direction of peeling the joint in the longitudinal direction.

Therefore, the energy of the impact force is first consumed in the direction of releasing the folding, so that the energy for peeling off the joint in the longitudinal direction is small, and the sealed liquid agent is hard to leak.

The direction of turning back includes the abdomen and the back, but is not limited. According to a fifth aspect of the present invention, there is provided a liquid bag characterized in that the folded longitudinal joint of the second or fourth aspect is thermally fused to an abdomen or a back.

When an impact force acts on the joint, it acts first in a direction to move the longitudinal joint away from the abdomen or back. In the present invention, since the folded longitudinal joint is heat-sealed to the abdomen or the back, the energy of impact force is consumed to separate the joint from the abdomen, for example, when the joint is separated from the abdomen. Even in this case, the energy for peeling off the joint portion is smaller than in the case of the invention of claim 2 or 4, and the sealed liquid agent is less likely to leak.

The invention according to claim 6 is the invention according to claim 2 or 4
A liquid bag according to the invention described in the above, wherein the folded longitudinal joint is attached to the abdomen or back using either an adhesive or an adhesive.

When an impact force acts on the joint, the joint acts first in a direction to separate the longitudinal joint from the abdomen. In the present invention, the folded portion has an adhesive on the abdomen or back,
By applying with one of the adhesives, the energy of the impact force is consumed to cause the joint to separate from the abdomen, causing the joint to separate even if the joint separates from the abdomen The energy is smaller than in the case of the second or fourth aspect of the invention, and the sealed liquid agent is less likely to leak.

The invention according to claim 7 is the invention according to claim 5 or 6.
The adhesive strength of the folded longitudinal joint to the abdomen, the adhesive strength of the pressure-sensitive adhesive, and the adhesive strength of the adhesive according to the invention described above were set to be smaller than the joint strength of the longitudinal joint of the liquid medicine bag. It is a liquid medicine bag characterized by the above-mentioned.

The fusion strength of the folded longitudinal joint to the abdomen, the adhesive strength of the adhesive, and the adhesive strength of the adhesive are set to be smaller than the joint strength of the longitudinal joint of the liquid bag. Therefore, even if a very large impact force acts on the joint, the longitudinal joint always separates from the abdomen or the back, and then acts to peel the joint after it separates.

The bonding strength in the present specification is
The strength is indicated by the pressure of air when the bag is broken when air is injected into the bonded bag. The invention according to claim 8 is the invention according to claim 5 or 6, wherein the length of the heat-sealed portion of the folded longitudinal joint, the adhesive length of the adhesive, and the adhesive length of the adhesive are the same. 5 of the length of the joint in the longitudinal direction of the liquid material bag
It is a liquid medicine bag characterized by being at least 0%.

The heat-sealed length of the folded longitudinal joint, the adhesive length of the adhesive, and the adhesive length of the adhesive are 50% of the longitudinal joint length of the liquid bag. According to the above, the energy of the impact force is consumed to separate the longitudinal joint from the abdomen or the back, so that the joint is less likely to peel off and the sealed liquid agent is less likely to leak. According to a fourth aspect of the present invention, there is provided the liquid medicine bag according to the fourth aspect, wherein the liquid medicine bag is housed in a box, and means for pressing the folded portion against the abdomen of the liquid medicine bag is provided in the box.

The box is provided with means for pressing the folded portion against the abdominal portion of the liquid medicine bag and is provided in the box. When an impact force is applied to the joint, the folded portion acts in a direction for releasing the folded portion. Then, as the folded back is released and the state becomes the same as that of the conventional liquid medicine bag, it acts in the direction of peeling the joint in the longitudinal direction.

Therefore, since the energy of the impact force is consumed for releasing the folding first, the energy for peeling off the joint in the longitudinal direction is reduced, and the sealed liquid agent is hardly leaked.

One example of the use of the liquid bag according to any one of the first to ninth aspects is an ink cartridge of a printer as in the tenth aspect. An eleventh aspect of the present invention is the liquid medicine bag according to any one of the first to tenth aspects, wherein the liquid medicine is sealed in a degassed state.

Even when the liquid agent is degassed due to anaerobic reasons or the like, that is, in a state in which gas serving as a cushion against impact force is not enclosed, the enclosed liquid agent is less likely to leak.

[0036]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) First Embodiment FIG. 1 is a perspective view showing an example in which the first embodiment is applied to an ink bag provided in an ink cartridge. This will be described with reference to FIG. 2 which is a cross-sectional view taken along the line CC.

The ink bag 101 includes an ink storage section 103 in which the ink 115 is sealed, and an ink introduction section 105 provided on one surface of the ink storage section 103 to guide the ink sealed in the ink storage section 103 to the outside. ing.

The ink storage section 103 includes a pair of first sheet materials 107 and 109 having a multi-layer structure, which are a back portion and an abdomen portion,
A set of multi-layered second sheet materials 111,
113, and the second sheet material 111, 113
Each of the sheet materials 107 and 10 so that
The edges (hatched portions in FIG. 1) of 9, 111 and 113 are heat-sealed.

The ink 115 sealed in the ink bag 101 of this embodiment is sealed in a degassed state to prevent oxidation. The ink bag 101 is housed in a box 121 as shown in FIG.
It is set to 3.

Then, a needle 131 having a hollow structure provided on the ink jet printer side is stabbed into the ink introduction portion 105, and the ink 11 in the ink bag 101 is pierced through the needle 131.
5 is supplied to the ink jet printer.

According to the above configuration, the second sheet material 11
The edges of the first sheet materials 107 and 109 and the second sheet materials 111 and 113 are heat-sealed such that the first and the first gores form a gore in the longitudinal direction. Attachments D, E, F, and G are formed.

That is, the heat-sealed portions D, E, F, and G in the longitudinal direction
Are twice as many as conventional liquid medicine bags. Therefore, the ink bag 1
01, even if a large impact acts on each of the heat-fused portions D, E,
The impact force acting on F and G is dispersed and smaller than that of the conventional liquid medicine bag.
F and G are not peeled off, and the enclosed ink is less likely to leak.

Further, even when the ink 115 is degassed, that is, in a state where a gas serving as a cushion against an impact force is not sealed, the sealed ink 115 does not easily leak.

Further, as shown in FIG. 2, the first sheet materials 107 and 109 and the second sheet materials 111 and 1
13 does not contact the ink 115, the first sheet material 107, 109 and the second sheet material 11
No delamination of 1 and 113 occurs.

It is sufficient if only one surface of the first sheet material 107, 109 and the second sheet material 111, 113 is a layer suitable for chemical resistance and heat fusion. The degree of freedom of the layer configuration is improved.

(2) Second Embodiment FIG. 4 is a perspective view showing an example in which the second embodiment is applied to an ink bag provided in an ink cartridge. This will be described with reference to FIG. 5 which is a cross-sectional view.

The ink bag 201 includes an ink storage section 203 in which the ink 215 is sealed, and an ink introduction section 205 provided on one surface of the ink storage section 203 to guide the ink sealed in the ink storage section 203 to the outside. ing.

The ink container 203 is formed by heat-sealing the upper and lower portions (hatched portions in FIG. 4) of a seamless tubular sheet material 207. The ink 215 sealed in the ink bag 201 of the present embodiment is sealed in a degassed state to prevent oxidation.

Further, similarly to the first embodiment, the ink bag 210 is housed in the box 121 and is used as an ink cartridge. However, since the configuration is the same, the description is omitted. According to the above configuration, since the upper and lower sides of the seamless tubular sheet material 207 are heat-sealed, there is no weak point in the longitudinal direction, so that a large impact acts on the ink bag 210. However, the enclosed liquid agent is less likely to leak.

(3) Third Embodiment FIG. 6 is a perspective view showing an example in which the third embodiment is applied to an ink bag provided in an ink cartridge. This will be described with reference to FIG. 7 which is a cross-sectional view.

The ink bag 301 includes an ink storage section 303 in which the ink 315 is sealed, and an ink introduction section 105 provided on one surface of the ink storage section 303 for guiding the ink sealed in the ink storage section 303 to the outside. ing.

Ink storage section 303 in which ink is sealed
Is formed by heat-sealing the edges (hatched portions in the figure) of each side of two laminated sheet materials having a multilayer structure, and furthermore, the heat-sealed portions J and K in the longitudinal direction are formed by ink storage portions. 303 is bent toward the abdomen.

According to the above configuration, when an impact force acts on the heat-sealed portions J, K, the heat-sealed portions K, J first act in a direction of separating the heat-sealed portions K, J from the abdomen. Therefore, the energy of the impact force is first consumed in a direction away from the heat-sealed portions K, J in the longitudinal direction from the abdomen, so that the heat-sealed portions K, J in the longitudinal direction are consumed.
The energy for peeling off is reduced, and the sealed liquid agent is less likely to leak.

The present invention is not limited to the above configuration. (1) In the above-described embodiment, the heat-sealed portions K and J are merely folded back, but the heat-sealed portions, J and K are heat-sealed to the abdomen or bonded using an adhesive. Alternatively, it may be made to adhere (adhere) using a double-sided tape.

In this case, even if the heat-sealed portions K and J are separated from the abdomen, the energy for peeling off the heat-sealed portions K and J is smaller than that in the case where the heat-sealed portions K and J are simply turned back, and the sealed liquid agent leaks further. In addition, the length of the heat-sealed portion of the folded portion, the adhesive length of the adhesive, and the adhesive length of the adhesive should be at least 50% of the length of the heat-sealed portions J and K in the longitudinal direction of the ink bag. Is desirable. That is, since the energy of the impact force is consumed to separate the heat-sealed portions K and J in the longitudinal direction from the abdomen, the heat-sealed portions K and J are hardly peeled off, and the sealed liquid agent is hardly leaked. .

Further, it is desirable that the heat-sealing strength of the folded portion, the adhesive strength of the pressure-sensitive adhesive, and the adhesive strength of the adhesive be set smaller than the heat-sealing strength of the heat-sealed portions K and J in the longitudinal direction of the ink bag. That is, even if a very large impact force acts on the heat-sealed portions K and J, the heat-sealed portions K and J in the longitudinal direction must be firstly used.
, Which acts to peel off the heat-sealed portions K and J after leaving the abdomen.

Further, the direction of turning back is not limited to the abdomen. Alternatively, it may be folded back. (2) As shown in FIG.
1 to form an ink cartridge 313, the folded heat-sealed portions K and J of the ink bag 301 are placed in a box 311.
A projection 340 may be provided as a means for pressing the stomach against the abdomen.

(3) In the first to third embodiments, the description has been made of the ink bag used for the ink cartridge. However, the present invention is also applicable to a medicine pack. (4) Also in the first embodiment, the heat-fused portions D,
E, F, and G may be folded back to the abdomen, sides, and back.

[0059]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The inventor of the present invention confirmed the effect of the present invention by using an ink bag having the structure shown in FIG.
And a drop test of an ink bag (conventional ink bag) as shown in FIG.

Each ink bag has a multilayer structure of 125 μm in thickness (a polyethylene layer (80 μm) + a nylon layer (15 μm) + aluminum layer (9 μm) + PET layer (12 μm) from the inside, and the adhesive layer of each layer is 3 μm). Sheet material.

The width of the ink bag is 127 mm and the length is 400 mm, and the height of the gore of the invention ink bag is 40 ± 10 m.
m. (1) Drop Test of Conventional Ink Bag First, the non-damage rate by a drop test when the volume ratio of the conventional ink bag was changed was examined, and the results are shown in FIG.
In addition, an ink bag as shown in FIG.
The cardboard case containing 10 ink cartridges of c) was dropped.

As can be seen from the figure, it was confirmed that breakage occurred when 900 cc (82% of the maximum volume) of ink was sealed. (2) Initial drop test Corrugated cardboard cases accommodating 10 ink cartridges of the inventive ink bag and 900 ink cartridges of the conventional ink bag filled with 900 cc (82% of the maximum volume) of ink, respectively, were 900 mm, 1200 mm, and 1500 mm in height. Then, the ink bags were dropped, and the damage of each ink bag was examined. The result is shown in FIG.

The inventive ink bag was not damaged in all cases, but the conventional ink bag was 900 mm, 1200 mm, 15 mm.
Breakage was confirmed at any height of 00 mm. (3) Vibration test Up and down vibration, left and right vibration, and back and forth vibration of a cardboard case containing 10 ink cartridges of the invention ink bag and 900 ink cartridges of the conventional ink bag each filled with 900 cc (82% of the maximum volume) of ink. Then, the damage of each ink bag was checked, and the result is shown in FIG.

It should be noted that the vibration is caused by an acceleration of 1 G in each direction.
At a frequency of 5 Hz to 100 Hz. The inventive ink bag was not damaged in all cases, but the conventional ink bag was confirmed to be damaged by vertical vibration.

(4) Drop Test after Vibration (Cardboard Case) The cardboard case containing 10 ink cartridges of the ink bag of the invention and the ink cartridge of the conventional ink bag after the vibration test performed in (2) was 900 mm and 12 mm, respectively.
The ink bags were dropped from heights of 00 mm and 1500 mm, and the damage of each ink bag was examined. The results are shown in FIG.

The ink bag of the invention was not damaged in all cases, but the conventional ink bag was 900 mm, 1200 mm, 15 mm.
Breakage was confirmed at any height of 00 mm. (5) Drop test after vibration (ink cartridge) The ink cartridge of the invention ink bag and the ink cartridge of the conventional ink bag after the vibration test performed in (2) are dropped from heights of 900 mm, 1200 mm, and 1500 mm, respectively. The damage of the ink bag was examined, and the result is shown in FIG.

Damage was confirmed when the height of each of the inventive ink bag and the conventional ink bag was 900 mm, 1200 mm, or 1500 mm. According to the experiments (2) to (5), the second sheet material is composed of one set of the first sheet material to be the back and the abdomen and one set of the second sheet material to be the side. It was confirmed that the ink bag as shown in FIG. 1 in which the edges of the first material and the second material were heat-sealed so that the ink became a longitudinal gore was less likely to leak ink.

[0068]

As described above, according to the first aspect of the present invention, the edges of the first material and the second material are so arranged that the second sheet material becomes a gore in the longitudinal direction. By joining, four joints are formed in the longitudinal direction.

That is, the number of joints in the longitudinal direction is twice that of the conventional liquid medicine bag. Therefore, even if a large impact acts on the liquid medicine bag, the impact force acting on each joint is dispersed and smaller than that of the conventional liquid medicine bag, so that the longitudinal joint is not peeled off and sealed. The liquid material is less likely to leak.

In the case where the first and second sheet materials have a multilayer structure and the joining is heat-sealing, it is sufficient that only one surface of the sheet is a layer suitable for chemical resistance and heat-sealing. Therefore, the degree of freedom of the layer configuration of the sheet material is improved.

Further, at this time, since the cut surface of the sheet does not come into contact with the liquid agent, delamination of the sheet material does not occur. According to the second aspect of the present invention, when the joint portion in the longitudinal direction is turned back, when an impact force acts on the joint portion, the joint portion acts first in the direction of releasing the turn-back. Then, as the folded back is released and the state becomes the same as that of the conventional liquid medicine bag, it acts in the direction of peeling the joint in the longitudinal direction.

Therefore, the energy of the impact force is consumed in the direction of releasing the folding first, so that the energy for peeling off the joint in the longitudinal direction becomes small, and the sealed liquid agent hardly leaks.

The direction of turning back includes, but is not limited to, abdomen, back, side, and the like. According to the third aspect of the present invention, by joining the upper and lower portions of the seamless tubular sheet material, there is no weak portion in the longitudinal direction in terms of strength, so a large impact acts on the liquid material bag. However, the enclosed liquid agent is less likely to leak.

According to the fourth aspect of the present invention, there is provided a liquid material bag characterized by having its longitudinal joint portion turned back. When an impact force acts on the joint by folding back the joint in the longitudinal direction, the joint acts first in the direction of releasing the folding. Then, as the folded back is released and the state becomes the same as that of the conventional liquid medicine bag, it acts in the direction of peeling the joint in the longitudinal direction.

Therefore, the energy of the impact force is consumed in the direction of releasing the folding first, so that the energy for peeling off the joint in the longitudinal direction becomes small, and the sealed liquid agent is hardly leaked.

According to the fifth aspect of the present invention, when an impact force acts on the joint, it acts in a direction to separate the longitudinal joint from the abdomen or back. In the present invention, since the folded longitudinal joint is heat-sealed to the abdomen or the back, the energy of impact force is consumed to separate the joint from the abdomen, for example, when the joint is separated from the abdomen. Even in this case, the energy for peeling off the joint portion is smaller than in the case of the invention of claim 2 or 4, and the sealed liquid agent is less likely to leak.

According to the sixth aspect of the present invention, when an impact force acts on the joint, the impact acts first in a direction to separate the longitudinal joint from the abdomen. In the present invention, by applying the folded portion to the abdomen or back using an adhesive or an adhesive, the energy of the impact force is consumed to separate the joint from the abdomen. Even if the joint part is separated from the abdomen, the energy for peeling the joint part is smaller than in the case of the invention of claim 2 or 4, and the sealed liquid agent is less likely to leak.

According to the seventh aspect of the invention, the adhesive strength of the adhesive, the adhesive strength of the adhesive, and the adhesive strength of the adhesive in the longitudinal direction of the liquid bag are measured. By setting smaller than the joint strength of the joint, even if a very large impact force acts on the joint,
Initially, the longitudinal joint separates from the abdomen or back and, after separation, acts to release the joint.

According to the eighth aspect of the present invention, the heat-sealing length of the folded longitudinally-joined portion, the adhesive length of the adhesive, and the adhesive length of the adhesive are determined by the length of the liquid bag. With 50% or more of the length of the joint in the direction, the energy of the impact force is consumed to move the joint in the longitudinal direction away from the abdomen or the back, so that the joint is less likely to peel and is sealed. According to the ninth aspect of the present invention, the liquid material is less likely to leak, and when the box is provided with a unit that is housed in the box and presses the folded portion against the abdomen of the liquid agent bag, an impact force acts on the joint. First, it acts in the direction of releasing the folding back. Then, as the folded back is released and the state becomes the same as that of the conventional liquid medicine bag, it acts in the direction of peeling the joint in the longitudinal direction.

Accordingly, since the energy of the impact force is consumed for releasing the folding first, the energy for peeling off the joint in the longitudinal direction is small, and the sealed liquid agent is hard to leak.

According to the eleventh aspect of the present invention, even if the liquid material is degassed due to anaerobic reasons or the like, that is, if the gas acting as a cushion against the impact force is not sealed, the liquid medicine is sealed. Liquid is less likely to leak.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example in which the first embodiment is applied to an ink bag provided in an ink cartridge.

FIG. 2 is a sectional view taken along section line CC of FIG. 1;

FIG. 3 is an explanatory diagram of an ink cartridge.

FIG. 4 is a perspective view showing an example in which the second embodiment is applied to an ink bag provided in an ink cartridge.

FIG. 5 is a cross-sectional view taken along section line HH in FIG. 4;

FIG. 6 is a perspective view showing an example in which the third embodiment is applied to an ink bag provided in an ink cartridge.

FIG. 7 is a sectional view taken along section line II of FIG. 6;

FIG. 8 is a diagram illustrating another embodiment.

FIG. 9 is a view showing the results of a drop test of a conventional ink bag of an example.

FIG. 10 is a diagram showing the results of an initial drop test of an example.

FIG. 11 is a diagram showing the results of a vibration test of an example.

FIG. 12 is a drop test after vibration (corrugated cardboard case) of the example.
It is a figure which shows the result of.

FIG. 13 is a diagram illustrating the results of a drop test after vibration (ink cartridge) of an example.

FIG. 14 is a diagram illustrating an example of a conventional ink bag of an ink cartridge used in an ink jet printer.

15 is a diagram illustrating an ink cartridge provided with the ink bag shown in FIG.

FIG. 16 is a diagram illustrating another example of a conventional ink bag of an ink cartridge used in an ink jet printer.

[Explanation of symbols]

 107,109 First sheet material 111,113 Second sheet material

Claims (11)

[Claims] 1. A liquid medicine bag in which a liquid medicine is sealed, comprising: a set of a first sheet material serving as a back portion and an abdomen; and a set of a second sheet material serving as a side portion; A liquid agent bag wherein edges of the first sheet material and the second sheet material are joined so that the sheet material becomes a longitudinal gore. 2. The liquid medicine bag according to claim 1, wherein a joining portion in a longitudinal direction of an edge portion of the first sheet material and the second sheet material is folded. 3. A liquid medicine bag in which a liquid medicine is enclosed, wherein a seamless tubular sheet material is joined at the upper and lower sides. 4. A liquid material bag in which a liquid material is sealed, wherein the liquid material bag is formed by joining edges of two sheet materials, and a joint in a longitudinal direction is turned back. 5. The liquid medicine bag according to claim 2, wherein the folded longitudinal joint is heat-sealed to the abdomen or the back. 6. The liquid bag according to claim 2, wherein the folded longitudinal joint is affixed to an abdomen or a back using an adhesive or an adhesive. 7. The adhesive strength of the folded longitudinal joint to the abdomen or back, the adhesive strength of the adhesive, and the adhesive strength of the adhesive are determined from the joint strength of the longitudinal joint of the liquid bag. The liquid medicine bag according to claim 5, wherein the liquid medicine bag is set to be small. 8. The heat-sealing length of the folded longitudinally-joined portion, the adhesive length of the pressure-sensitive adhesive, and the adhesive length of the adhesive are the same as the length of the heat-sealed portion in the longitudinal direction of the liquid bag. The liquid medicine bag according to claim 5, wherein the amount of the liquid medicine bag is 50% or more. 9. The liquid medicine bag according to claim 4, wherein the liquid medicine bag is housed in a box, and means for pressing the folded portion against the abdomen of the liquid medicine bag is provided in the box. 10. The liquid medicine bag according to claim 1, which is used for an ink cartridge of a printer. 11. The liquid medicine bag according to claim 1, wherein the liquid medicine is sealed in a degassed state.