JP2004216866A - Liquid cartridge and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid cartridge which can be filled with a small amount of liquid, and a liquid cartridge manufacturing method. <P>SOLUTION: First, a liquid cartridge is prepared which is not filled with liquid (S100). In step 100, filling materials which do not absorb liquid are filled into the air side closure of the cartridge main unit. Next, a film is attached to the cartridge main unit filled with filling materials, and a lid is mounted. Then, the liquid storage chamber is decompressed (S102). Next, liquid is filled into the supply side storage chamber of the liquid storage chamber which is decompressed in step 102 (S104). Next, the liquid cartridge, filled with liquid in supply side storage chamber in step 104, is released in the atmosphere (S106). Next, the liquid cartridge released to the air in step 106 is packed by decompressing the package (S108). <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a liquid cartridge and a method for manufacturing a liquid cartridge. In particular, the present invention relates to a liquid cartridge for supplying a liquid to a liquid ejecting apparatus and a method for manufacturing the liquid cartridge.

2. Description of the Related Art In an ink jet recording apparatus as an example of a liquid ejecting apparatus, there is an apparatus that performs color recording using inks of a plurality of colors. Each color ink is filled in a separate ink cartridge. Each color ink cartridge stores ink in an ink storage unit and supplies ink to a recording head of an ink jet recording apparatus (for example, Patent Document 1).
JP-A-2002-192744 (FIG. 2)

  The amount of ink used for color recording varies depending on the color. If the amount of ink filled in the ink cartridge is the same regardless of the color difference, the time required for all the ink of the small amount used to be consumed is longer than that of the ink of the large amount used. long. If the time required until the ink in the ink cartridge is used up is long, the solvent and the colorant of the ink in the ink cartridge are separated, and the colorant may precipitate and coagulate. As a result, the recording head does not normally eject ink, and the recording quality may be degraded. Further, in a printing apparatus that is used less frequently, the deterioration of the printing quality or the performance of the printing apparatus may be caused by the above-mentioned deterioration of the ink before all the inks are used. In some cases, it is preferable not to fill the ink.

  However, when preparing an ink cartridge with a small amount of ink and an ink cartridge with a large amount of ink, when changing the size of the ink cartridge, the method of attachment to the recording device and the accuracy of the attachment are changed and handled. When only the ink filling amount is changed for an ink cartridge of the same volume, the degassing state changes depending on the space that is not filled with ink, or the effect of bubbling occurs, which affects print quality. .

  According to a first aspect of the present invention, there is provided a method of manufacturing a liquid cartridge configured to be detachable from a liquid ejecting apparatus and configured to supply a liquid to the liquid ejecting apparatus. Preparing a liquid cartridge having a liquid supply unit for connection with the liquid supply unit, a supply-side storage chamber that communicates with the liquid supply unit, and an atmosphere-side storage unit that communicates with the supply-side storage room and that can communicate with the atmosphere. A pressure reducing step of depressurizing at least the supply-side storage chamber, and a filling step of filling only the supply-side storage chamber depressurized by the pressure reduction step with liquid. Since the supply-side storage chamber of the decompressed liquid storage chamber is filled with the liquid, the liquid can be filled in every corner of the supply-side storage chamber while maintaining the degassed state of the liquid. Since the liquid is filled only in the supply-side storage chamber, it is possible to manufacture a liquid cartridge in which a small volume of liquid is stored.

  The above-described liquid cartridge manufacturing method may further include, in the liquid cartridge in which the supply-side storage chamber is filled with the liquid in the filling step, an open-to-atmosphere step of opening at least the atmosphere-side storage section to the atmosphere. After injecting the liquid into the supply-side storage chamber of the decompressed liquid storage chamber, the difference in pressure between the inside and the outside of the liquid cartridge can be reduced by opening the liquid cartridge to the atmosphere. Therefore, even if air is stored instead of liquid in the atmosphere-side storage section, when the liquid cartridge is mounted on the liquid ejecting apparatus, air flows backward from the recording head due to the difference in pressure between the inside and the outside of the liquid cartridge. Without damaging the recording head.

  The method for manufacturing a liquid cartridge may further include a step of packaging the liquid cartridge in which the atmosphere-side housing section has been opened to the atmosphere in the step of opening to the atmosphere, in a decompressed package. Since the liquid cartridge is packaged in a decompressed package, the degassed state of the liquid in the liquid cartridge even after the liquid cartridge is packaged and before the user removes the liquid cartridge from the package for actual use. Can be kept constant.

  The method for producing a liquid cartridge may further include a step of filling the filling member that does not absorb the liquid into the atmosphere-side containing section. By filling the filling member that does not absorb the liquid into the atmosphere-side accommodation portion, the liquid does not flow into the atmosphere-side accommodation portion. Therefore, the liquid can be reliably filled in the supply-side storage chamber.

  According to a second aspect of the present invention, there is provided a liquid cartridge configured to be detachable from a liquid ejecting apparatus and configured to supply a liquid to the liquid ejecting apparatus, wherein a liquid supply unit for connecting to the liquid ejecting apparatus is provided. A supply-side storage chamber that communicates with the supply unit, an atmosphere-side storage section that communicates with the supply-side storage chamber and that can be opened to the atmosphere, and a filling member that fills the atmosphere-side storage section and does not absorb liquid. Since the liquid cartridge includes a filling member that does not absorb liquid in the atmosphere-side container, the liquid is not filled in the atmosphere-side container. Therefore, the liquid can be reliably filled in the supply-side storage chamber.

  In the above liquid cartridge, the filling member may be a porous member that is not connected to each of the porous members. Because each of the porosity is not in communication, the porous member does not absorb liquid. For this reason, the liquid is not filled in the atmosphere-side accommodation section in which the porous member is arranged. Therefore, the liquid can be reliably filled in the supply-side storage chamber.

  The above summary of the present invention does not list all of the necessary features of the present invention, and a sub-combination of a group of these features may also be an invention.

  Hereinafter, the present invention will be described through embodiments of the present invention. However, the following embodiments do not limit the invention according to the claims, and all combinations of the features described in the embodiments are not limited thereto. It is not always essential to the solution of the invention.

  FIG. 1 is a front view showing an example of a liquid cartridge suitable for supplying a liquid to a liquid ejecting head of a liquid apparatus, taking an ink cartridge 100 for an ink jet recording apparatus as an example, and viewing its structure from obliquely above. It is a perspective view. An object of the present embodiment is to provide an ink cartridge 100 that can be filled with a small amount of ink and a method of manufacturing the ink cartridge 100.

  The liquid ejecting apparatus according to the present invention includes not only a liquid ejecting head of an ink jet recording apparatus, but also a color material ejecting head of a color filter producing apparatus for producing a color filter of a liquid crystal display, an organic EL display, an FED (surface). It includes an electrode material (conductive paste) ejecting head for forming an electrode such as a light emitting display), a biological organic matter ejecting head of a biochip manufacturing apparatus for producing a biochip, and a sample ejecting head as a precision pipette.

  2 and 3 are rear perspective views of the ink cartridge 100 of FIG. 1 as viewed obliquely from below. FIG. 2 is a diagram showing a state before the film 110 is attached to the surface of the ink cartridge 100. FIG. 4 is a diagram showing a state in which a film 110 is attached to the ink cartridge 100. 4 and 5 are exploded perspective views showing members constituting the ink cartridge 100 in an exploded manner. 6 and 7 are front views of the ink cartridge 100 of FIG. 1, FIG. 6 is a diagram showing a state before the film 130 is attached to the opening 122 of the ink cartridge 100, and FIG. FIG. 3 is a diagram illustrating a state in which a film is attached to an opening of an ink cartridge. In FIG. 7, the film 130 is attached to a region indicated by hatching.

  As shown in FIG. 4, the ink cartridge 100 includes a cartridge body (container body) 120 having a bottom and a substantially housing shape having an opening 122, a film 130 covering almost the entire surface of the opening 122, and the film 130. Is provided with a lid 140 that covers the outside of the device. The inside of the cartridge body 120 is defined by ribs and walls as described later. The film 130 seals substantially the entire surface of the opening 122 of the cartridge main body 120 so that the inside is sealed. The lid 140 is fixed to the cartridge body 120 so as to further cover the outside of the film 130 in a non-sealed state.

  The cartridge body 120 includes an ink storage unit 111 that stores ink, an ink flow path unit from the ink storage unit 111 to the ink supply unit 160, an ink-side passage that connects the ink storage unit 111 to the atmosphere, an air valve storage unit, And an atmosphere communicating portion comprising an atmosphere side passage, and is integrally formed of, for example, polypropylene (PP).

  The ink cartridge 100 further includes an ink supply control unit 150, an ink supply unit 160, a storage unit 170, and an engagement lever 180. The ink supply unit 160 is disposed on the lower surface of the cartridge main body 120, and the ink supply needle of the holder in which the ink cartridge 100 is mounted is inserted, and the ink stored in the ink storage unit 111 is transferred to the recording head of the inkjet recording apparatus. Supply. The storage means 170 is caulked to the mounting portion 190, and the mounting portion 190 is caulked below the side surface of the cartridge main body 120 and mounted. The storage unit 170 stores information on the type of the ink cartridge 100, information on the color of the ink held by the ink cartridge 100, and information on the existing amount of the ink, and communicates with the apparatus main body by a plurality of terminals 171 exposed on the surface. Pass this information between. The engagement lever 180 is formed on the upper portion of the side surface of the cartridge main body 120 facing the attachment portion 190, and engages with the holder of the ink jet recording apparatus.

  The ink supply control unit 150 supplies the ink in the ink storage unit 111 to the ink supply unit 160 based on the pressure difference between the ink storage unit 111 and the ink supply unit 160 that occurs as the ink is consumed. The ink supply control unit 150 includes a membrane valve 900 that is elastically deformable and is an example of a valve member that is inserted into the differential pressure valve unit accommodating portion 495 of the cartridge main body 120, and a valve lid 151 that covers the differential pressure valve unit accommodating portion 495. And a coil spring 907 as an example of an urging member disposed between the membrane valve 900 and the valve lid 151. The membrane valve 900, the valve cover 151, and the coil spring 907 are examples of a differential pressure valve unit that constitutes the ink supply control unit 150 of the present invention.

  6 and 7, the ink container 111 is largely divided into an upper part and a lower part by a wall 272 extending in the horizontal direction, and an air-side container 270 capable of communicating with the atmosphere through a communication hole 242 is provided at a lower part. In addition, a supply-side storage chamber 290 is formed in the upper part and includes two first ink storage units 292 and second ink storage units 294 that are shielded from the atmosphere. The supply-side storage chamber 290 is divided into two, first and second ink storage sections 292 and 294, by an oblique wall 271 having a communication section 276 near the wall 272 (lower region). A channel portion 296 is formed so as to be surrounded by the housing portion 294. The flow path section 296 is connected to the second ink storage section 294 via a lower communication section 278, and is connected to the ink supply control means 150 via the passages 298 and 300 and the through hole 918.

  A filling member 40 made of a material that does not absorb liquid and has substantially the same shape as the atmosphere-side accommodation section 270 is filled in the atmosphere-side accommodation section 270. An example of the filling member 40 is a porous member in which a plurality of fine holes in the porous member are independent of each other and are not connected. An example of the porous member is a sponge in which a film that separates cavities formed by foaming after the porous member is manufactured by foaming is not removed. Since such a sponge does not allow ink to enter each cavity due to the film, no capillary phenomenon occurs, and no ink is absorbed.

  In addition, the filling member 40 has irregularities on the surface, and a gap is formed between the filling member 40 and the inner wall of the atmosphere-side accommodation section 270. Further, since the atmosphere-side containing section 270 and the first ink containing section 292 are communicated with each other by the vertically extending communication path 295, when air flows into the atmosphere-side containing section 270 from the ink-side path, the inflow air is removed from the atmosphere. Through the gap between the inner wall of the side storage section 270 and the filling member 40, from the slit 162, through the second ink injection port 163, and inside the communication section 274, and through the communication path 295, the first ink storage section 292.

  Further, a downstream side of the ink supply control unit 150 is formed at one end of the through hole 910 communicating with the ink supply control unit 150, the communication portion 302 communicating with the through hole 910, the flow path 321, and the flow path 321. The ink supply unit 160 is configured to communicate with the ink supply unit 160 through a through hole 323 formed to face the communication hole and a communication unit 304 having one end communicating with the through hole 323.

  In response to the consumption of ink from the ink supply unit 160, the communication unit 274, the slit 162, the second ink injection port 163, and the communication path 295 are supplied from the atmosphere-side storage unit 270 of the ink storage unit 111 to the ink supply control unit 150. The ink flows through the communication portions 276 and 278, the flow path portion 296, the passages 298 and 300, and the through hole 918 in this order.

  On the other hand, the atmosphere valve portion 250 has a hollow portion 232 which is an atmosphere valve housing portion in which the atmosphere valve 254 is housed, and the wall surface below the hollow portion 232 has a diameter slightly smaller than the diameter of the shaft portion 264 of the atmosphere valve 254. Has a communication hole 239 also serving as a communication passage for the atmosphere, and a shaft portion 264 of the atmosphere valve 254 is constantly urged toward the bottom surface of the ink cartridge 100 by a spring 255 and is slidably inserted therein. When the ink cartridge 100 is not mounted on the holder of the ink jet recording apparatus, the communication hole 239 is sealed by the atmosphere valve 254.

  FIG. 8 is a rear view showing a state before the film 110 is attached in the ink cartridge 100 of FIG. The atmosphere-side passage, which is a side communicating with the atmosphere with the above-described communication hole 239 as a boundary, is formed on the bottom surface of the opening 212, the meandering passage 214, the filter housing 216, the communication hole 218 and the communication part 222, and the communication part 222. A communication hole 253 and a communication portion 224 are provided.

  Specifically, as shown in FIG. 8, one end of one maze-shaped passage 214 formed on the front side of the cartridge main body 120 is open to the atmosphere as an opening 212, and the other end is ink repellent and air permeable. The filter 215 (FIGS. 4 and 5) having the function described in FIG. The filter housing portion 216 communicates with a communication hole 218 penetrating from the front side to the back side of the cartridge main body 120. The communication hole 218 is connected to the communication portion 224 via a communication portion 222 on the back side of the cartridge main body 120 and a communication hole 253 formed at the bottom of the room defining the communication portion 222. A chamber 930 having a concave portion is provided in the middle of the passage 214.

  As shown in FIG. 2, the communication portion 224 is formed as a concave portion 257 on the bottom surface of the cartridge main body 120, and exposes a shaft portion 264 serving as an operating rod of the atmospheric valve 254 and communicates with the hollow portion 232 that houses the atmospheric valve 254. A communication hole 239 that allows communication and a communication hole 253 that communicates with the communication portion 222 are formed in the recess 257, and the outer surface of the recess 257 seals the first ink inlet 161 and the second ink inlet 163. It is formed by sealing with a film 132. The film 132 is selected so that it can be elastically deformed by the pressing force of the projection protruding from the holder.

  On the other hand, as shown in FIG. 6, the ink-side passage communicating with the atmosphere-side accommodation portion 270 with the above-described communication hole 239 as a boundary includes the hollow portion 232, the communication hole 234a, the communication chamber 234b, the communication section 234c, the communication chamber 234d, and the communication port. A portion 236, a communication chamber 237, a communication hole 238, a communication groove 240, and a communication hole 242 are formed. More specifically, a through hole 234a is formed in an upper wall of the hollow portion 232, and a communication chamber 234b and a communication section 234c formed by notching the upper wall of the communication chamber 234b through the through hole 234a. An air passage communicating with a communication chamber 234d provided above the communication part 234c, a communication part 236 formed by a cutout in the upper wall of the communication chamber 234d, and a communication chamber 237 formed with a communication hole 238 below. Is formed.

  The communication hole 238 penetrating from the back side to the front side of the cartridge main body 120 is connected to the communication groove 240 communicating with the communication hole 238, the communication side with the communication groove 240, and through the communication hole 242 penetrating from the front side to the back side of the cartridge main body 120 to the atmosphere side. It communicates with the accommodation part 270.

  These films 130 and 110 are adhered to the walls defining the atmosphere-side housing section 270, the supply-side housing chamber 290, the atmosphere valve section 250, the atmosphere-side passage, and the ink-side passage by heat welding or the like. This results in an area isolated from the atmosphere.

  The ink supply unit 160 includes a seal member 12 formed of an elastomer or the like having an insertion port 26 provided in the holder and into which an ink supply needle is inserted, a supply valve 13 for closing the insertion port 26 of the seal member 12, a supply valve 13, And an urging member 14 made of a coil spring or the like for urging the member 13 toward the seal member 12. A film 604 is attached to the insertion opening 26 of the seal member 12 at the time of shipment from the factory.

  When the ink cartridge 100 is mounted on the holder of the ink jet recording apparatus, the convex portion provided on the holder pushes up the shaft portion 264 of the atmospheric valve 254 through the film 132, and the ink supply needle of the holder supplies ink. The supply valve 13 of the section 160 is pushed upward. Thus, the communication hole 239 communicates the atmosphere flow path from the hollow portion 232 to the communication hole 242 with the atmosphere. The upstream of the supply valve 13 in the ink supply unit 160 communicates with the ink supply needle. When the ink cartridge 100 is mounted on the holder for the first time after shipment from the factory, the ink supply needle of the holder breaks the film 604 attached to the insertion port 26 of the ink cartridge 100 and enters the insertion port 26.

  When the ink jet recording apparatus starts recording in a state where the communication hole 242 communicates with the atmosphere, ink is supplied from the ink supply unit 160 to the recording head through the ink supply needle. When the ink is supplied from the ink supply unit 160 to the recording head, the ink in the ink storage unit 111 flows in the order of the arrow a and the through hole 918 shown in FIG. 6, and passes through the ink supply control unit 150 as shown in FIG. The ink flows in the order of arrows c and d, flows into the ink supply unit 160, and is supplied to the ink supply needle inserted into the ink supply unit 160. In accordance with the flow of the ink, the air flows from the communication hole 242 to the atmosphere-side accommodating portion 270 through the communication route of the arrow f, the communication portion 224 on the bottom surface, and the arrow g in this order in FIG.

  The ink in the first ink storage unit 292 and the second ink storage unit 294 of the supply-side storage chamber 290 is consumed in this order. During this time, the ink in the supply-side storage chamber 290 is prevented from flowing back to the atmosphere-side storage section 270 due to the surface tension due to the meniscus of the ink formed in the slit 162 that connects the supply-side storage chamber 290 and the atmosphere-side storage section 270. Is done.

  When the ink in the first ink container 292 starts to be consumed, air flows into the first ink container 292. As a result, although the liquid level of the first ink container 292 drops, only the lower portion of the first ink container 292 and the second ink container 294 is communicated by the communication unit 276. The ink in the container 292 is consumed. When the ink in the first ink storage unit 292 is consumed and the liquid level reaches the communication unit 276, air is also supplied to the second ink storage unit 294 as the ink in the second ink storage unit 294 is consumed. Inflow. While the ink in the second ink storage unit 294 is consumed, a surface tension due to the meniscus of the ink is generated in the communication unit 276, so that the ink in the second ink storage unit 294 is prevented from flowing back to the first ink storage unit 292. You.

  As described above, the ink in the first ink storage unit 292 and the second ink storage unit 294 is consumed in this order, but the ink moves up and down the ink storage unit 111 regardless of the storage surface of the ink. The ink is supplied to the ink supply unit 160 from the communication part 278 disposed near the wall 272 that is approximately divided into two parts, through the communication part 300, and through the through hole 918.

  FIG. 9 is a flowchart illustrating a procedure for manufacturing the ink cartridge 100. To manufacture the ink cartridge 100 of the present embodiment, first, an ink cartridge 100 not filled with ink is prepared (S100). In step 100, the components of the ink cartridge 100 are assembled. First, the filling member 40 that does not absorb ink is filled in the atmosphere-side containing section 270 of the cartridge main body 120. Next, a film is attached to the cartridge main body 120 filled with the filling member 40, and the lid 140 is further attached.

  Subsequent to step 100, the pressure of the ink storage unit 111 is reduced (S102). The pressure in the ink storage unit 111 is reduced by being evacuated by a pump or the like, which is a suction unit connected to the ink supply unit 160. Next, the ink is filled only in the supply-side storage chamber 290 of the ink storage unit 111 that has been decompressed in step 102 (S104). The ink is injected from the second ink injection port 163 connected to the communication path 295. Since the filling member 40 that does not absorb ink is filled in the atmosphere-side containing section 270, the ink does not flow. Therefore, it is possible to reliably fill only the supply-side storage chamber 290 with ink. In addition, since the supply-side storage chamber 290 that has been decompressed is filled with ink, it is possible to fill the corners of the supply-side storage chamber 290 with ink while keeping the ink degassed. In addition, while the ink is being injected from the second ink injection port 163, the exhaust from the ink supply unit 160 may be continued.

  Next, the ink cartridge 100 filled with the ink in the supply-side storage chamber 290 in step 104 is opened to the atmosphere (S106). By disposing the ink cartridge 100 in the atmosphere with the ink injection port 400 opened, the atmosphere-side housing section 270 of the ink cartridge 100 is opened to the atmosphere. After that, the ink inlet 400 is sealed with a film. After the ink is filled in the supply-side storage chamber 290 that has been reduced in pressure, the internal pressure of the ink cartridge 100 can be made closer to the atmospheric pressure by once releasing the ink cartridge 100 to the atmosphere. Therefore, even if air is contained in the atmosphere-side housing section 270, when the ink cartridge 100 is mounted on the ink jet recording apparatus, the air flows backward from the recording head due to the difference between the internal pressure of the ink cartridge 100 and the atmospheric pressure. In addition, it is possible to prevent the recording head from being damaged.

  Next, the ink cartridge 100 released to the atmosphere in step 106 is placed in a package, and the package is packed under reduced pressure (S108). This is the end of this flowchart. Since the ink cartridge 100 is packaged by decompressing the package, the degassed state of the ink in the ink cartridge 100 can be kept constant after packaging until the user opens the package. In particular, since no ink is stored in the atmosphere-side storage section 270, the volume occupied by the decompressed air increases, and the ink stored in the supply-side storage chamber 290 can be more reliably degassed. Also, even when the ink cartridge 100 is taken out of the package and mounted on the ink jet recording apparatus, since the atmosphere-side accommodation section 270 contains air instead of ink, it also prevents sudden changes in the outside air. To the inside of the ink cartridge 100, it is possible to prevent dew condensation, drawing in from the ink jet type recording apparatus, and leakage of the ink to the outside of the ink cartridge 100.

  In the above, the case where the pressure in the entire ink storage chamber 110 is reduced in step 102 has been described. However, when only the supply-side storage chamber 290 into which the ink is injected is reduced in pressure, the volume to be reduced is small. Thus, the pressure reduction step can be simplified. In addition, by filling the air into the atmosphere-side receiving section 270 from the first ink inlet 161 without filling the filling member 40, an ink cartridge with a large ink filling amount can be easily realized using the same ink cartridge. It goes without saying that you can do it.

  As described above, the present invention has been described using the embodiments, but the technical scope of the present invention is not limited to the scope described in the above embodiments. It is apparent to those skilled in the art that various changes or improvements can be made to the above-described embodiment. It is apparent from the description of the appended claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

FIG. 3 is a front perspective view of the ink cartridge 100. FIG. 3 is a rear perspective view of the ink cartridge 100 before a film 110 is attached. FIG. 3 is a rear perspective view of the ink cartridge 100 after a film 110 is attached. FIG. 3 is an exploded perspective view of the ink cartridge 100. FIG. 3 is an exploded perspective view of the ink cartridge 100. FIG. 3 is a front view of the ink cartridge 100 before a film 130 is attached. FIG. 3 is a front view of the ink cartridge 100 after a film 130 is attached. FIG. 3 is a rear view of the ink cartridge before a film is attached. 6 is a flowchart illustrating a procedure for manufacturing the ink cartridge 100.

Explanation of reference numerals

  12 seal member, 13 supply valve, 14 urging section, 26 insertion port, 40 filling member, 100 ink cartridge, 110 ink storage section , 120: cartridge body, 140: lid, 150: ink supply control means, 160: ink supply unit, 170: storage means, 180: engagement member, 210 ... · Atmosphere side passageway, 242 ··· Communication hole, 250 ··· Atmospheric valve part, 270 ··· Atmospheric side accommodation part, 272 ··· Wall, 274, 276, 278, 302, 304 ··· Communication part, 275: communication path, 290: supply side storage chamber, 292 ... first ink storage section, 294 ... second storage chamber, 296 ... third storage chamber, 298 ... passage, 400, 401: ink inlet

Claims (6)

A method for manufacturing a liquid cartridge configured to be detachable from a liquid ejecting apparatus and for supplying a liquid to the liquid ejecting apparatus,
A liquid supply unit for connecting to the liquid ejecting apparatus, a supply-side storage chamber that communicates with the liquid supply unit, and an air-side storage unit that communicates with the supply-side storage room and that can communicate with the atmosphere. A preparation step for preparing the cartridge;
A decompression step of decompressing at least the supply-side storage chamber,
A filling step of filling only the supply-side chamber depressurized by the depressurizing step with a liquid.   2. The liquid cartridge according to claim 1, wherein the liquid cartridge in which the supply-side storage chamber is filled with the liquid by the filling step further includes an atmosphere opening step of opening at least the atmosphere-side accommodation section to the atmosphere. 3. Production method.   The liquid cartridge manufacturing method according to claim 2, further comprising: packaging the liquid cartridge in which the atmosphere-side container is opened to the atmosphere by the step of opening to the atmosphere, in a reduced-pressure package.   The method for manufacturing a liquid cartridge according to claim 1, further comprising a step of filling the filling member that does not absorb the liquid into the atmosphere-side containing section. A liquid cartridge configured to be detachably attached to the liquid ejecting apparatus and for supplying a liquid to the liquid ejecting apparatus,
A liquid supply unit for connecting to the liquid ejecting apparatus, a supply-side storage chamber communicating with the liquid supply unit,
An atmosphere-side accommodation unit that communicates with the supply-side accommodation chamber and can be opened to the atmosphere;
A filling member that is filled in the atmosphere-side housing portion and does not absorb liquid.   The liquid cartridge according to claim 5, wherein the filling member is a porous member that is not communicated with a porous body.

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