JP2005169853A - Liquid vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid vessel which prevents an inner surface of a flexible liquid bag, constituting the liquid vessel, from being scratched by a gas absorber, and which optimizes the arrangement of the gas absorber so that the flexible liquid bag constituting the liquid vessel is prevented from becoming hard to collapse. <P>SOLUTION: This liquid vessel 2 is equipped with: the flexible liquid bag 3 which is formed of a flexible film and wherein a liquid is stored; a liquid supply port member 4 which is provided in the bag so as to send out the liquid to the outside from the bag 3; and the gas absorber 5 with a decompression space for absorbing gas which is dissolved in the liquid stored inside the bag 3. The gas absorber 5 is formed separately from the bag 3, arranged inside the bag 3 and fixed to the member 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a liquid container for storing a liquid supplied to a liquid consuming apparatus and having a function of absorbing a gas dissolved in a liquid inside the liquid container.

  A typical example of a conventional liquid consuming apparatus is a liquid ejecting apparatus that ejects liquid droplets from an ejecting head. A typical example of the liquid ejecting apparatus is an ink jet recording apparatus that includes an ink jet recording head for image recording. There is. Inkjet recording apparatuses are used for many printing including color printing in recent years because noise during printing is relatively small and small dots can be formed with high density.

  As a liquid supply method for a liquid consuming device typified by an ink jet recording apparatus, there is a method of supplying a liquid from a liquid container storing the liquid to the liquid consuming device. Furthermore, the liquid supply method using the liquid container is configured to be detachable from the liquid consuming device so that the user can easily replace the liquid container when the liquid in the liquid container is consumed. Generally, a liquid container is configured as a cartridge.

  In general, an ink jet recording apparatus includes a carriage mounted with a recording head for ejecting ink droplets and reciprocating along a recording surface of a recording medium. As a method of supplying ink from an ink cartridge to the recording head, There is a system in which an ink cartridge is mounted and ink is supplied to the recording head from an ink cartridge that reciprocates with the recording head. As another method, there is a method in which an ink cartridge is mounted on the case of the apparatus main body and the ink is supplied from the ink cartridge to the recording head via an ink flow path formed by a flexible tube or the like.

By the way, if the ink cartridge is filled for a long time after being filled with ink, N ₂ may be generated due to a chemical change of the dye in the ink. Further, when the barrier property of the ink container constituting the cartridge is low, there is a possibility that N ₂ or O ₂ may enter the ink from the outside through the container wall.

When printing is performed in a state where a large amount of N ₂ or O ₂ is dissolved in the ink in the ink cartridge, bubbles may be generated in the ink due to a pressure change or the like during ink ejection. When bubbles are generated in the ink as described above, ejection failure may occur due to the blockage of the ink flow path due to the bubbles and the print quality may be deteriorated.

  In order to solve the above-described problem, Japanese Patent Application Laid-Open No. 1-208145 proposes an ink container for ink jet recording having a vacuum portion that is enclosed in a partition member that is insoluble in the ink composition and has gas permeability.

Japanese Patent Laid-Open No. 9-327930 discloses a gas permeable film interposed in an ink container so that the inside of the ink container is divided into an ink storage chamber and a negative pressure gas intake chamber that takes in gas into the ink. A partitioned ink container for an ink jet recording apparatus has been proposed.
JP-A-1-208145 JP-A-9-327930

  However, in an ink container having a vacuum portion enclosed by a partition wall member proposed in Japanese Patent Laid-Open No. 1-208145, the vacuum portion is not fixed in the ink container, so that the ink container may be vibrated or dropped. When an impact is applied, there is a possibility that the vacuum part enclosed by the partition member collides with the inner surface of the ink container and is damaged. In addition, in the case of an ink pack formed of a flexible bag, if the vacuum part enclosed by the partition member comes to the end position far from the ink supply port of the ink pack, the ink pack is not easily crushed. As a result, the remaining amount of ink increases.

  Further, in an ink container having a vacuum portion enclosed by a partition member proposed in Japanese Patent Laid-Open No. 1-208145, it is extremely difficult to inspect the reduced pressure state in the vacuum portion, and a predetermined reduced pressure state is produced at the time of manufacture or the like. There was also a problem that it was not possible to confirm whether or not

  Further, in an ink container proposed in Japanese Patent Laid-Open No. 9-327930, in which an ink container is partitioned into an ink storage chamber and a gas intake chamber by a gas permeable film, the pressure is reduced using an outer film constituting the ink container. Due to the formation of the space, there has been a problem that the operations for manufacturing the ink container and filling the ink become extremely complicated.

  Japanese Patent Laid-Open No. 9-327930 also shows an example in which the decompression space is formed only by the gas permeable film separately from the outer film constituting the ink container. In this example, the decompression space forming member is shown. Since the bag of the gas permeable film containing the ink is disposed at a position away from the ink supply port of the ink container, there is a problem that the ink pack is hardly crushed and the remaining amount of ink increases.

  Further, in the ink container proposed in Japanese Patent Laid-Open No. 9-327930, in which the inside of the ink container is divided into an ink storage chamber and a gas intake chamber by a gas permeable film, it is extremely difficult to inspect the reduced pressure state in the gas intake chamber Thus, there is a problem that it cannot be confirmed whether or not a predetermined reduced pressure state is ensured at the time of manufacture or the like.

  The present invention has been made in view of the above-described circumstances, and includes a gas absorption device that can absorb gas dissolved in a liquid stored in a liquid container using a decompression space, and a liquid container. The liquid in which the arrangement of the gas absorbing device is optimized so that the inner surface of the flexible liquid bag constituting the liquid container is not damaged by the gas absorbing device and the flexible liquid bag constituting the liquid container is not easily crushed. The purpose is to provide a container.

  Another object of the present invention is to provide a liquid container including a gas absorbing device that can easily inspect the presence or absence of a reduced pressure necessary for gas absorption.

  In order to solve the above-described problems, the present invention provides a liquid container for storing a liquid supplied to a liquid consuming apparatus, a flexible liquid bag formed of a flexible film and storing the liquid therein, and the movable container. A liquid supply port member provided in the flexible liquid bag for delivering the liquid from the flexible liquid bag to the outside, and dissolved in the liquid stored in the flexible liquid bag A gas absorbing device having a decompression space for absorbing gas, wherein the gas absorbing device is formed separately from the flexible liquid bag and disposed inside the flexible liquid bag, and is disposed in the liquid supply port member. A fixed gas absorbing device.

  Preferably, when the liquid inside the flexible liquid bag is consumed and the flexible liquid bag is crushed, the flexible liquid bag can easily adhere to the outer surface of the gas absorbing device. In addition, the liquid supply port member and the gas absorbing device have a substantially common outer shape at their connecting portions.

  Preferably, when the liquid inside the flexible liquid bag is consumed and the flexible liquid bag is crushed, the flexible liquid bag can easily adhere to the outer surface of the gas absorbing device. Furthermore, at least a part of the outer surface shape of the gas absorbing device is rounded.

  Preferably, when the liquid inside the flexible liquid bag is consumed and the flexible liquid bag is crushed, the flexible liquid bag can easily adhere to the outer surface of the gas absorbing device. Further, the end of the gas absorbing device opposite to the portion connected to the liquid supply port member is formed in a flat shape.

  Preferably, the gas absorption device includes a decompression container having an opening and a flexible film that closes the opening in a state where the interior of the decompression container is decompressed, and the decompression container is decompressed. The outer surface is formed of a gas permeable material through which a gas dissolved in the liquid inside the liquid container can permeate. Yes.

  Preferably, the flexible film that closes the opening of the decompression container is attached to the opening formed in a portion of the gas absorbing device facing the liquid supply port member.

  Preferably, the opening of the decompression container is formed with a size smaller than a portion of the liquid supply port member facing the gas absorbing device.

  Preferably, the apparatus further includes a fixing means for fixing the gas absorbing device to the liquid supply port member.

  Preferably, the fixing means includes a claw-like projection provided in the liquid supply port member, and a locking hole provided in the gas absorption device and inserted and locked by the claw-like projection. Have.

  Preferably, the apparatus further includes check valve means that opens only when the liquid flows in the direction of flowing out from the flexible liquid bag, and the check valve means includes the liquid supply port member. Has a check valve lid member formed separately and attached to the liquid supply port member, and a valve body housed between the check valve lid member and the liquid supply port member, The claw-like protrusion is provided on the check valve lid member.

  Preferably, the check valve lid member is formed integrally with the decompression container of the gas absorbing device and is displaceable between a fixed position and an open position of the fixing means.

  Preferably, at least a part of the decompression container is formed of the gas permeable material.

  Preferably, at least a part of the flexible film is formed of the gas permeable material.

  Preferably, the gas permeable material includes a thermoplastic resin.

  Preferably, the thermoplastic resin is any one of polypropylene, polyethylene, and polystyrene.

  Preferably, the flexible film is airtightly attached around the opening of the decompression container by heat welding.

  Preferably, the liquid consuming device is an ink jet recording device, and the liquid container is an ink cartridge that is detachably attached to the ink jet recording device.

  According to the present invention, the gas absorbing device that can absorb the gas dissolved in the liquid stored in the liquid container by using the decompression space is provided, and the inner surface of the flexible liquid bag constituting the liquid container is a gas. It is possible to provide a liquid container in which the arrangement of the gas absorption device is optimized so that the flexible liquid bag constituting the liquid container is not easily crushed without being damaged by the absorption device.

  Hereinafter, an ink cartridge for an ink jet recording apparatus will be described with reference to the drawings as an embodiment of a liquid container incorporating a gas absorbing device according to the present invention.

  FIG. 1 is a perspective view showing an ink jet recording apparatus 100 in which an ink cartridge 1 according to the present embodiment is mounted on a cartridge mounting portion 101. In this example, six cartridge mounting portions 101 are provided in the ink jet recording apparatus 100, and each cartridge mounting portion 101 is open on the front surface of the ink jet recording apparatus 100. Further, the six cartridge mounting portions 101 are juxtaposed in the same horizontal plane, and the six ink cartridges 1 are juxtaposed side by side.

  As shown in FIG. 2, the ink cartridge 1 includes an ink container (liquid container) 2 and a rigid case member 50 that houses the ink container 2. The case member 50 includes a case main body 50A whose upper surface is opened and a lid member 50B that seals the upper surface opening of the case main body 50A. On the side surface of the case member 50, a circuit board 51 is provided on which an IC (semiconductor storage element) that stores information such as ink type and remaining amount is stored.

The ink container 2 is provided with a flexible ink bag (flexible liquid bag) 3 that is formed of a flexible film and stores ink therein, and the ink is flexible. Ink supply port member (liquid supply port member) 4 for sending out from the ink bag 3 to the outside, and gas such as N ₂ and O ₂ dissolved in the ink stored in the flexible ink bag 3 And a gas absorption device 5 for absorbing gas. The supply port of the ink supply port member 4 is sealed with a supply port film 40 when not used.

  As shown in FIGS. 3 and 4, a seal member 8 is attached to the outer end of the ink supply port member 4 with a spring seat 7 biased by a spring 6 disposed therein. A check valve lid member 10 is attached to the inner end of the ink supply port member 4 with a valve body 9 disposed therein. The check valve lid member 10 is formed separately from the ink supply port member 4 and then attached to the ink supply port member 4 by heat caulking.

  The check valve means 17 including the valve body 9 and the check valve lid member 10 functions so as to be opened only when the ink flows in the direction of flowing out from the flexible ink bag 3.

  As shown in FIG. 4, the pressurized fluid for introducing the pressurized fluid for pressurizing the ink inside the case member 50 and delivering it from the ink container 2 to the front surface of the case member 50 as shown in FIG. 4. An introduction port 52 is formed. Further, a pair of positioning holes 53 a and 53 b into which a pair of positioning protrusions provided in the cartridge mounting portion 101 are inserted are formed on the front surface of the case member 50.

  In addition, an erroneous mounting prevention structure 54 is provided at one corner of the case member 50 including the front surface. The erroneous mounting prevention structure 54 is configured to prevent the ink cartridge 1 of the correct ink type from being correctly mounted at a predetermined position when the ink cartridge 1 is mounted to the ink jet recording apparatus 100. A shape other than the ink cartridge is provided so that it cannot be mounted.

  Further, an ink supply opening 55 in which the front end portion of the ink supply port member 4 is disposed is formed on the front surface of the case member 50.

  As shown in FIGS. 3 to 5, the gas absorption device 5 includes a decompression container 12 having an opening 11 and a flexible film 13 that closes the opening 11 in a state where the inside of the decompression container 12 is decompressed. . The gas absorbing device 5 is formed separately from the flexible ink bag 3 and is disposed inside the flexible ink bag 3 and is fixed to the ink supply port member 4.

  The flexible film 13 is adhered in an airtight manner around the opening 11 of the decompression container 12 by heat welding. By using heat welding, the opening 11 of the vacuum container 12 can be reliably sealed by the flexible film 13.

  The gas absorbing device 5 is entirely in contact with the ink inside the ink container 2 on the outer surface. In the gas absorbing device 5, the pressure reduced in the decompression container 12 is received by the inner surface, and at least a part of the outer surface contacting the ink in the ink container 2 is contained in the ink inside the ink container 2. It is formed of a gas permeable material through which gas dissolved in the gas can permeate. More specifically, at least a part of the decompression container 12 and / or at least a part of the flexible film 13 is formed of a gas permeable material. Preferably, the entire decompression container 12 and / or the entire flexible film 13 is formed of a gas permeable material to ensure a large contact area with the ink.

  Here, the gas permeable material includes a thermoplastic resin, and is preferably one of polypropylene, polyethylene, and polystyrene. These thermoplastic resins are materials that do not easily cause a chemical reaction with ink, and are materials that have appropriate gas permeability.

  The flexible ink bag 3 of the ink container 2 is formed of a flexible film made of a material having a gas permeability smaller than that of a gas permeable material constituting at least a part of the gas absorbing device 5. Specifically, the flexible ink bag 3 is composed of a single layer film or a laminated film having at least one kind of an aluminum laminated film, a silica vapor deposited film, and an alumina vapor deposited film.

  In this way, by forming the flexible ink bag 3 of the ink container 2 with a flexible film made of a material having a gas permeability smaller than that of the gas permeable material constituting at least a part of the gas absorbing device 5, The gas absorbed through the flexible ink bag 3 of the ink container 2 and dissolved in the ink can be reliably absorbed by the gas absorbing device 5.

  As shown in FIGS. 6 and 7, when the liquid in the ink container 2 is consumed and the flexible ink bag 3 is crushed, the flexible ink bag 3 is placed on the outer surface of the gas absorbing device 5. In order to facilitate the close contact, the ink supply port member 4 and the decompression container 12 of the gas absorption device 5 have a substantially common outer shape at the connection portion thereof, and the decompression container 12 of the gas absorption device 5 The outer shape is rounded. Furthermore, the end 5a opposite to the portion connected to the ink supply port member 4 of the gas absorbing device 5 is formed in a flat shape.

  As a result, the amount of ink that remains in the ink container 2 without being consumed by the flexible ink bag 3 that has been crushed by the consumption of the ink is sufficiently adhered to the outer surfaces of the ink supply port member 4 and the gas absorbing device 5. Can be reduced.

  Further, the opening 11 of the decompression container 12 is formed with a size smaller than the portion of the ink supply port member 4 that faces the gas absorbing device 5. Thereby, attachment of the gas absorption apparatus 5 with respect to the ink supply member 4 can be performed without trouble. In addition, there is no step between the ink supply port member 4 and the gas absorbing device 5, and the flexible ink bag 3 crushed by the consumption of the ink is in close contact with the outer surfaces of the ink supply port member 4 and the gas absorbing device 5, The amount of ink that remains in the ink container 2 without being consumed can be reduced.

  Further, since the flexible film 13 of the gas absorbing device 5 is attached to the opening 11 formed in the portion facing the ink supply port member 4 of the gas absorbing device 5, the flexible film 13 is attached. Therefore, a flat sticking surface required to do so can be positioned between the gas absorbing device 5 and the ink supply port member 4 so as not to be exposed to the outer surface. Thereby, when the ink in the ink container 2 is consumed and the flexible ink bag 3 is crushed, the adhesion of the flexible ink bag 3 to the outer surface of the gas absorbing device 5 is caused by the flat film sticking surface. There is no hindrance. Therefore, the amount of ink that remains in the ink container 2 without being consumed by the flexible ink bag 3 that has been crushed by the consumption of the ink is sufficiently adhered to the outer surface of the ink supply port member 4 and the gas absorbing device 5. Can be reduced.

  The ink container 2 in the present embodiment further includes a fixing means 14 for fixing the gas absorbing device 5 to the ink supply port member 4. The fixing means 14 is provided at a pair of claw-like protrusions 15 provided at the inner end of the ink supply port member 4 and at an end of the gas absorbing device 5 on the ink supply port side. And a pair of locking holes 16 into which 15 is inserted and locked.

  In the present embodiment, the pair of claw-like protrusions 15 are not provided directly on the ink supply port member 4, and are formed integrally with the check valve cover member 10, and then the check valve cover member 10. Is attached to the ink supply port member 4.

  When the gas absorbing device 5 is attached to the ink supply port member 4, it can be easily assembled by connecting the pair of claw-like projections 15 to the pair of locking holes 16 by snap fitting. For this reason, manufacturing cost can be reduced.

  Next, the manufacturing method of the gas absorption apparatus 5 mentioned above is demonstrated.

  First, a decompression container 12 having an opening 11 is prepared. Next, the opening 11 is closed with the flexible film 13 in a state where the inside of the decompression container 12 is decompressed to a pressure lower than the atmospheric pressure. As shown in FIG. 8A, this closing process is performed inside the decompression chamber 200 decompressed to a pressure lower than the atmospheric pressure.

  Next, the decompression container 12 with the flexible film 13 attached is taken out from the decompression chamber 2. Then, as shown in FIG. 8B, the amount of deflection of the flexible film 13 closing the opening 11 under the atmospheric pressure is measured by the optical sensor 201 or the like, and the amount of deflection of the flexible film 13 is calculated. Based on this, the decompressed state inside the decompression vessel 12 is inspected.

  As described above, at least a part of the vacuum container 12 and / or at least a part of the flexible film 13 is formed of a gas permeable material.

  As described above, according to this embodiment, since at least a part of the decompression container 12 and / or at least a part of the flexible film 13 of the gas absorbing device 5 is formed of the gas permeable material, the ink The gas dissolved therein passes through the portion of the gas permeable material of the gas absorption device 5 and is absorbed into the decompression container 12 in a decompressed state. Thereby, generation | occurrence | production of gas in the ink in the ink container 2 by the pressure change at the time of printing, etc. is suppressed, and the fall of the printing quality by generation | occurrence | production of gas can be prevented.

  Further, in the present embodiment, since the gas absorbing device 5 is fixed to the ink supply port member 4 by the fixing means 14, even when an impact such as vibration or dropping is applied to the ink container 2, The gas absorbing device 5 does not move inside and damages the inner surface of the flexible ink bag 3.

  In addition, since the mounting position of the gas absorbing device 5 is on the ink supply port side, the flexible ink bag 3 is not easily crushed when the ink is consumed, and the remaining amount of ink does not increase. Further, since the gas absorbing device 5 is arranged on the ink supply port side of the ink container 2, when the flexible ink bag 3 is crushed, the ink remaining on the side opposite to the ink supply port flows to the supply port side. For this reason, there is an effect that a flow path is secured, thereby reducing the remaining amount of ink.

  Moreover, in this embodiment, since the gas absorption apparatus 5 can be comprised by sealing the opening 11 of the pressure reduction container 12 in a pressure-reduced state with the flexible film 13, the gas absorption apparatus 5 by which the inside was pressure-reduced. Can be easily manufactured, and by checking the bending amount of the flexible film 13 with the optical sensor 201 or the like, the reduced pressure state of the vacuum container 12 at the time of manufacturing or the like can be easily checked.

  Next, as a modification of the above-described embodiment, as shown in FIGS. 9 to 11, the check valve lid member 10 can be formed integrally with the decompression container 12 of the gas absorption device 5. Specifically, the check valve lid member 10 is connected to the decompression vessel 12 through the flexible piece 18, and the fixing position (FIG. 11 (b), (d)) of the fixing means 14 and the open position (FIG. 11 ( It is configured to be displaceable between a) and (c)).

  Also in this modification, the same effect as the above-described embodiment can be obtained, and the manufacturing cost can be reduced by reducing the number of parts.

1 is a perspective view showing an ink jet recording apparatus equipped with an ink cartridge according to an embodiment of the present invention. FIG. 3 is an exploded perspective view showing an ink cartridge according to an embodiment of the present invention, and showing a state in which a case member of the ink cartridge is opened. FIG. 2 is an exploded perspective view showing an ink cartridge according to an embodiment of the present invention, in which a case member of the ink cartridge is opened and an ink container 2 is disassembled. FIG. 4 is an exploded perspective view illustrating a state where the ink cartridge illustrated in FIG. 3 is viewed from another angle. 2A and 2B are perspective perspective views illustrating an ink container of an ink cartridge according to an embodiment of the present invention, wherein FIGS. 2A and 2B are views viewed from different angles. FIG. It is the figure which showed the ink supply port member and gas absorption apparatus in one Embodiment of this invention, (a) is a top view, (b) is a side view, (c) is sectional drawing along the BB line, (D) is sectional drawing along the AA line, (e) is a back view, (f) is a front view. It is the figure which showed the ink supply port member and gas absorption apparatus in one Embodiment of this invention, (a), (b) is each the perspective view seen from another angle, (c), (d) is each different. The exploded perspective view seen from the angle of. It is a figure for demonstrating the method for manufacturing the gas absorption apparatus in one Embodiment of this invention, (a) is the figure which showed the process of sticking a flexible film to a pressure-reduced container, (b) is The figure which showed the process which test | inspects the pressure reduction state of a pressure reduction container. It is the figure which showed the ink supply port member and gas absorption apparatus in one modification of one Embodiment of this invention, (a) is a top view, (b) is a side view, (c) is along a BB line. Sectional drawing, (d) is sectional drawing along the AA line, (e) is a back view, (f) is a front view. It is the figure which showed the ink supply port member and gas absorption apparatus in one modification of one Embodiment of this invention, (a), (b) is the perspective view seen from another angle, respectively (c), (d) ) Are exploded perspective views as seen from different angles. It is the figure which showed the pressure reduction container and check valve cover member in the modification shown in FIG. 10, (a), (c) is the top view which showed the state in which the check valve cover member exists in the open position of a fixing means. And (b) and (d) are a plan view and a perspective view showing a state in which the check valve lid member is in a fixing position of the fixing means.

Explanation of symbols

1 Ink cartridge 2 Ink container (liquid container)
3 Flexible ink bag (flexible liquid bag)
4 Ink supply port member (liquid supply port member)
5 Gas Absorbing Device 9 Valve Body 10 Check Valve Lid Member 11 Depressurized Container Opening 12 Depressurized Container 13 Flexible Film 14 Fixing Means 15 Claw-shaped Projection 16 Locking Hole 17 Check Valve Means 18 Flexible Piece

Claims (17)

In the liquid container for storing the liquid supplied to the liquid consuming device,
A flexible liquid bag formed of a flexible film and storing the liquid therein;
A liquid supply port member provided in the flexible liquid bag for delivering the liquid from the flexible liquid bag to the outside;
A gas absorption device having a decompression space for absorbing a gas dissolved in the liquid stored in the flexible liquid bag, wherein the gas absorption device is formed separately from the flexible liquid bag. And a gas absorbing device disposed inside the flexible liquid bag and fixed to the liquid supply port member.   When the liquid inside the flexible liquid bag is consumed and the flexible liquid bag is crushed, the liquid supply is performed so that the flexible liquid bag can easily adhere to the outer surface of the gas absorbing device. The liquid container according to claim 1, wherein the mouth member and the gas absorbing device have a substantially common outer shape at their connection portion.   When the liquid inside the flexible liquid bag is consumed and the flexible liquid bag is crushed, the gas absorption is performed so that the flexible liquid bag can easily adhere to the outer surface of the gas absorption device. The liquid container according to claim 1, wherein at least a part of the outer shape of the device is rounded.   When the liquid inside the flexible liquid bag is consumed and the flexible liquid bag is crushed, the gas absorption is performed so that the flexible liquid bag can easily adhere to the outer surface of the gas absorption device. The liquid container according to any one of claims 1 to 3, wherein an end of the device opposite to a portion connected to the liquid supply port member is formed in a flat shape.   The gas absorbing device includes a decompression container having an opening, and a flexible film that closes the opening in a state where the interior of the decompression container is decompressed, and the decompressed pressure in the decompression container is applied to the inner surface. The at least part of the outer surface of the portion that contacts the liquid in the liquid container is formed of a gas permeable material that allows gas dissolved in the liquid inside the liquid container to pass therethrough. The liquid container according to any one of 4.   The liquid container according to claim 5, wherein the flexible film that closes the opening of the decompression container is attached to the opening formed in a portion of the gas absorbing device facing the liquid supply port member.   The liquid container according to claim 6, wherein the opening of the decompression container is formed with a size smaller than a portion of the liquid supply port member facing the gas absorbing device.   The liquid container according to claim 1, further comprising a fixing means for fixing the gas absorbing device to the liquid supply port member.   The said fixing means has a claw-like projection provided in the liquid supply port member, and a locking hole provided in the gas absorption device and into which the claw-like projection is inserted and locked. Liquid container.   It further includes check valve means that opens only when the liquid flows in the direction of flowing out from the flexible liquid bag, and the check valve means is formed separately from the liquid supply port member. And a check valve lid member attached to the liquid supply port member, and a valve body housed between the check valve lid member and the liquid supply port member, The liquid container according to claim 9, wherein the liquid container is provided on the check valve lid member.   The liquid container according to claim 10, wherein the check valve lid member is formed integrally with the decompression container of the gas absorbing device and is displaceable between a fixing position and an open position of the fixing means.   The liquid container according to claim 1, wherein at least a part of the decompression container is formed of the gas permeable material.   The liquid container according to claim 1, wherein at least a part of the flexible film is formed of the gas permeable material.   The liquid container according to claim 1, wherein the gas permeable material includes a thermoplastic resin.   The liquid container according to claim 14, wherein the thermoplastic resin is any one of polypropylene, polyethylene, and polystyrene.   The liquid container according to any one of claims 1 to 15, wherein the flexible film is air-tightly attached around the opening of the decompression container by heat welding. The liquid consuming device is an ink jet recording device,
The liquid container according to claim 1, wherein the liquid container is an ink cartridge that is detachably attached to the ink jet recording apparatus.

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