JP4055690B2 - Liquid cartridge and liquid cartridge manufacturing method - Google Patents

Description

  The present invention relates to a liquid cartridge and a liquid cartridge manufacturing method. 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.

An ink jet recording apparatus as an example of a liquid ejecting apparatus performs color recording using a plurality of colors of ink. Each color ink is filled in a separate ink cartridge. Each color ink cartridge stores ink in an ink storage portion and supplies the ink to a recording head of an ink jet recording apparatus (for example, Patent Document 1).
Japanese Patent Laid-Open No. 2002-192744 (FIG. 2)

  The amount of ink used for color recording varies depending on the color. When the amount of ink filled in the ink cartridge is the same regardless of the difference in color, the time required to consume all of the less used color ink is shorter than that of the more used color ink. long. If the time required to use up the ink in the ink cartridge is long, the solvent and the colorant of the ink in the ink cartridge are separated, and precipitation and aggregation of the colorant may occur. For this reason, the recording head may not eject the ink normally, and the recording quality may deteriorate. Also, in a recording device that is not frequently used, before all the ink is used, deterioration of the recording quality and performance of the recording device may be caused due to the above-described alteration of the ink. In some cases, it was preferable not to fill the ink.

  However, when preparing an ink cartridge with a small amount of ink filling and an ink cartridge with a large amount of ink filling, if the size of the ink cartridge is changed, the mounting method and the mounting accuracy to the recording device have changed. When changing only the ink filling amount to an ink cartridge of the same volume, there was an influence on the print quality such as the deaeration state changed due to the space not filled with ink or the influence of bubbling occurred .

In order to solve the above problems, in a first aspect of the present invention, a liquid cartridge manufacturing method configured to be detachable from a liquid ejecting apparatus and supplying liquid to the liquid ejecting apparatus, the liquid ejecting apparatus comprising: A preparatory step for preparing a liquid cartridge having a liquid supply unit for connection to the liquid supply unit, a supply-side storage chamber communicating with the liquid supply unit, and an atmosphere-side storage unit communicating with the supply-side storage chamber and capable of communicating with the atmosphere; A step of filling the atmosphere-side accommodation part with a filling member that has irregularities on the surface and does not absorb liquid with a gap between the atmosphere-side accommodation part and the atmosphere, and at least the supply-side accommodation chamber is decompressed a decompression step, a filling step of filling the liquid only on the supply side accommodating chamber whose pressure is reduced by vacuum step, while being divided by a wall of the supply-side accommodating chamber and the atmosphere-side housing portion, the communication passage Is communicated with, the air flows into the air-side housing section, the inflow air passes through the gap between the filler member and the atmosphere side housing portion, further flows into the supply side accommodating chamber through the communication passage. Since the supply-side storage chamber of the decompressed liquid storage chamber is filled with the liquid, it is possible to fill the liquid to every corner of the supply-side storage chamber while maintaining the deaerated state of the liquid. Since only the supply-side storage chamber is filled with the liquid, a liquid cartridge in which a small volume of liquid is stored can be manufactured. Moreover, the liquid does not flow into the atmosphere side accommodating portion by filling the atmosphere side accommodating portion with a filling member that does not absorb the liquid. Therefore, it is possible to reliably fill the supply side storage chamber with the liquid.

  The liquid cartridge manufacturing method may further include an atmosphere release step of opening at least the atmosphere side accommodation portion to the atmosphere in the liquid cartridge in which the supply side accommodation chamber is filled with the liquid in the filling step. After injecting the liquid into the supply side storage chamber of the decompressed liquid storage chamber, the pressure difference between the inside and the outside of the liquid cartridge can be reduced by opening the liquid cartridge to the atmosphere. For this reason, even if air is stored in the atmosphere-side storage portion, air flows backward from the recording head due to the pressure difference between the inside and the outside of the liquid cartridge when the liquid cartridge is mounted on the liquid ejecting apparatus. Without this, the recording head can be prevented from being damaged.

  The liquid cartridge manufacturing method may further include a step of wrapping the liquid cartridge in which the atmosphere-side container is opened to the atmosphere by the atmosphere releasing step in a decompressed package. Since the liquid cartridge is packaged in a decompressed package, the liquid in the liquid cartridge is deaerated 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.

In a second aspect of the present invention, a liquid cartridge configured to be detachable from the liquid ejecting apparatus and for supplying liquid to the liquid ejecting apparatus, the liquid supply unit for connecting to the liquid ejecting apparatus, and the liquid A supply-side storage chamber that communicates with the supply section, an atmosphere-side storage section that communicates with the supply-side storage chamber and that can be opened to the atmosphere , and has a surface with irregularities. The supply side storage chamber and the atmosphere side storage portion are divided by a wall and communicated by a communication path, and are filled in the atmosphere side storage portion and do not absorb liquid. When air flows into the air, the air that has flowed in passes through the gap between the atmosphere-side accommodation portion and the filling member, and further flows into the supply-side accommodation chamber through the communication path, so that the atmosphere-side accommodation portion is not filled with liquid. Therefore, it is possible to reliably fill the supply side storage chamber with the liquid.

  In the liquid cartridge, the filling member may be a porous member that does not communicate with each of the porous members. Since each of the porous members is not connected, the porous member does not absorb the liquid. Therefore, the liquid is not filled in the atmosphere side accommodating portion in which the porous member is disposed. Therefore, it is possible to reliably fill the supply side storage chamber with the liquid.

  The above summary of the invention does not enumerate all the necessary features of the present invention, and sub-combinations of these feature groups can also be the invention.

  Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the scope of claims, and all combinations of features described in the embodiments are included. It is not necessarily essential for 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 its structure viewed obliquely from 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 for manufacturing the ink cartridge 100.

  The liquid ejecting apparatus referred to in the present invention is not only a liquid ejecting head of an ink jet recording apparatus, but also a colorant ejecting head of a color filter manufacturing apparatus for manufacturing a color filter of a liquid crystal display, an organic EL display, an FED (surface And an electrode material (conductive paste) ejecting head for forming electrodes such as a light emitting display), a bio-organic matter ejecting head of a biochip manufacturing apparatus for manufacturing 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, and FIG. 2 is a diagram illustrating a state before the film 110 is attached to the surface of the ink cartridge 100. FIG. 4 is a diagram illustrating a state where a film 110 is attached to the ink cartridge 100. 4 and 5 are exploded perspective views showing the 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. 2 is a diagram illustrating a state in which a film is attached to an opening portion of the ink cartridge. FIG. In FIG. 7, the film 130 is attached to the area indicated by hatching.

  As shown in FIG. 4, the ink cartridge 100 includes a bottomed substantially casing-shaped cartridge main body (container main body) 120 having an opening 122, a film 130 covering almost the entire surface of the opening 122, and the film 130. A lid 140 is provided to cover the outside. The interior of the cartridge body 120 is partitioned by ribs and walls as will be described later. The film 130 seals almost the entire surface of the opening 122 of the cartridge main body 120 so that the inside thereof is in a sealed state. The lid 140 is further fixed to the cartridge body 120 so as to cover the outside of the film 130 in an unsealed state.

  The cartridge main 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 allows the ink storage unit 111 to communicate with the atmosphere, an atmospheric valve storage unit, And an air communication portion including an air 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 an ink supply needle of a holder to 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 ink jet recording apparatus. Supply. The storage unit 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. 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, information on the existing amount of ink, and the like. Pass this information between. The engagement lever 180 is formed on the upper portion of the side surface of the cartridge main body 120 that faces the mounting portion 190 and engages with the holder of the ink jet recording apparatus.

  The ink supply control unit 150 supplies ink in the ink storage unit 111 to the ink supply unit 160 due to a pressure difference between the ink storage unit 111 and the ink supply unit 160 that is generated as the ink is consumed. The ink supply control unit 150 is elastically deformable and includes a membrane valve 900 that is an example of a valve member inserted into the differential pressure valve unit housing portion 495 of the cartridge body 120 and a valve lid 151 that covers the differential pressure valve unit housing 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 lid 151, and the coil spring 907 are an example of a differential pressure valve unit that constitutes the ink supply control means 150 of the present invention.

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

  The atmosphere side accommodating portion 270 is filled with a filling member 40 made of a material that is substantially the same shape as the atmosphere side accommodating portion 270 and does not absorb liquid. An example of the filling member 40 is a porous member, in which a plurality of fine holes in the porous member are independent and do not communicate with each other. An example of the porous member is a sponge in which a porous member is produced by foaming, and a membrane separating the cavities generated by foaming is not removed. Such sponges do not allow ink to enter the cavities due to the membrane, so capillary action does not occur and ink is not 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 portion 270. Further, since the atmosphere-side container 270 and the first ink container 292 are communicated with each other by a communication path 295 that extends vertically, when air flows into the atmosphere-side container 270 from the ink-side path, the air that flows in The first ink container passes through the gap between the inner wall of the side container 270 and the filling member 40, moves from the slit 162 through the second ink inlet 163, moves through the communication part 274, and passes through the communication path 295. 292.

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

  Corresponding 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 connected from the atmosphere side storage unit 270 of the ink storage unit 111 to the ink supply control unit 150. 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 atmospheric valve portion 250 has a hollow portion 232 that is an atmospheric valve accommodating portion in which the atmospheric valve 254 is accommodated, and the wall surface below the hollow portion 232 has a diameter slightly larger than the diameter of the shaft portion 264 of the atmospheric valve 254. Has a communication hole 239 that also serves as an air communication channel, and the shaft portion 264 of the air valve 254 is constantly urged toward the bottom surface of the ink cartridge 100 by a spring 255 and is slidably inserted. Thus, the communication hole 239 is sealed by the atmospheric valve 254 when the ink cartridge 100 is not attached to the holder of the ink jet recording apparatus.

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

  Specifically, as shown in FIG. 8, one end of a single passage 214 meandering in a maze formed on the front side of the cartridge body 120 is opened to the atmosphere as an opening 212, and the other end is ink-repellent and breathable. The filter 215 (FIGS. 4 and 5) having the above function is connected to the filter housing portion 216 in which the filter 215 is housed. The filter housing portion 216 communicates with a communication hole 218 that penetrates from the front side to the back side of the cartridge main body 120. The communication hole 218 is connected to the communication part 224 via a communication part 222 on the back side of the cartridge main body 120 and a communication hole 253 formed in the bottom of the room that defines the communication part 222. In the middle of the passage 214, a chamber 930 made of a recess is provided.

  As shown in FIG. 2, the communication portion 224 is formed as a recess 257 on the bottom surface of the cartridge main body 120, exposes the shaft portion 264 that is an operating rod of the atmospheric valve 254, and the hollow portion 232 that houses the atmospheric valve 254. A communication hole 239 capable of communication and a communication hole 253 communicating with the communication portion 222 are formed in the concave portion 257, and the outer surface of the concave portion 257 is sealed with the first ink injection port 161 and the second ink injection port 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 protrusion 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 communication hole 239 described above as a boundary includes the hollow portion 232, the communication hole 234 a, the communication chamber 234 b, the communication portion 234 c, the communication chamber 234 d, and the communication A portion 236, a communication chamber 237, a communication hole 238, a communication groove 240, and a communication hole 242 are formed. Specifically, a through hole 234a is formed in the upper wall of the hollow portion 232, and the communication chamber 234b and a communication portion 234c formed by a cutout in the upper wall of the communication chamber 234b through the through hole 234a. An air passage communicating with a communication chamber 234d provided at the upper portion of the communication portion 234c, a communication portion 236 formed by a notch 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, and communicates 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. It communicates with the housing part 270.

  The atmosphere side accommodating portion 270, the supply side accommodating chamber 290, the atmosphere valve portion 250, the atmosphere side passage, and the ink side passage are adhered to the walls partitioning the films 130 and 110 by a method such as heat welding. By this, it becomes a region 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 into which an ink supply needle provided in the holder is inserted, a supply valve 13 that closes the insertion port 26 of the seal member 12, and a supply valve And an urging member 14 made of a coil spring or the like for urging 13 toward the seal member 12. A film 604 is attached to the insertion port 26 of the seal member 12 at the time of factory shipment.

  When the ink cartridge 100 is attached to 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 part 160 is pushed up. As a result, the communication hole 239 communicates the atmosphere channel from the hollow portion 232 to the communication hole 242 with the atmosphere. Further, upstream of the supply valve 13 in the ink supply unit 160 communicates with the ink supply needle. When the ink cartridge 100 is loaded into 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 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. 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 ink, air flows from the communication hole 242 to the atmosphere-side accommodation unit 270 through the arrow f, the bottom surface communication unit 224, and the path indicated by the arrow g in FIG.

  The ink in the first ink storage portion 292 and the second ink storage portion 294 in 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 portion 270 due to the surface tension of the ink meniscus formed in the slit 162 that communicates the supply-side storage chamber 290 and the atmosphere-side storage portion 270. Is done.

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

  As described above, the ink in the first ink containing portion 292 and the second ink containing portion 294 is consumed in this order, but the ink moves up and down the ink containing portion 111 regardless of the containing portion. Then, the ink is supplied to the ink supply unit 160 from the communication portion 278 disposed in the vicinity of the wall 272, which is substantially bisected, through the communication portion 300 and the through hole 918.

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

  Following the step 100, the ink containing portion 111 is depressurized (S102). The ink storage unit 111 is decompressed by being exhausted by a pump or the like that is a suction unit connected to the ink supply unit 160. Next, ink is filled only in the supply-side storage chamber 290 of the ink storage unit 111 that has been depressurized in step 102 (S104). Ink is injected from the second ink injection port 163 connected to the communication path 295. The atmosphere-side container 270 is filled with the filling member 40 that does not absorb ink, so that ink does not flow in. Therefore, it is possible to reliably fill only the supply-side storage chamber 290 with ink. Further, since the supply-side storage chamber 290 that has been decompressed is filled with ink, the ink can be filled into every corner of the supply-side storage chamber 290 while maintaining the deaerated state of the ink. Note that while the ink is being injected from the second ink injection port 163, the ink supply unit 160 may continue to exhaust air.

  Next, the ink cartridge 100 filled with 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 inlet 400 opened, the atmosphere-side container 270 of the ink cartridge 100 is opened to the atmosphere. Thereafter, the ink injection port 400 is sealed with a film. After the decompressed supply-side storage chamber 290 is filled with ink, the ink cartridge 100 is once opened to the atmosphere, whereby the internal pressure of the ink cartridge 100 can be brought close to atmospheric pressure. For this reason, even if air is contained in the atmosphere-side container 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. Therefore, it is possible to prevent the recording head from being damaged.

  Next, the ink cartridge 100 released to the atmosphere in the step 106 is placed in a package, and the package is decompressed and packaged (S108). This flowchart is complete | finished above. Since the ink cartridge 100 is packaged by decompressing the package, the deaerated state of the ink in the ink cartridge 100 can be kept constant after the packaging until the user opens the package. In particular, since the ink is not stored in the atmosphere-side storage unit 270, the volume occupied by the decompressed air is increased, and the ink stored in the supply-side storage chamber 290 can be degassed more reliably. Even when the ink cartridge 100 is taken out of the package and attached to the ink jet recording apparatus, since air is stored in the atmosphere-side storage unit 270 instead of ink, a sudden change in the outside air is buffered. Therefore, condensation, pull-in from the ink jet recording apparatus, and leakage of ink to the outside of the ink cartridge 100 can be prevented.

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

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

2 is a front perspective view of the ink cartridge 100. FIG. 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. 2 is an exploded perspective view of the ink cartridge 100. FIG. 2 is an exploded perspective view of the ink cartridge 100. FIG. 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 100 before a film 110 is attached. 4 is a flowchart showing a manufacturing procedure of the ink cartridge 100.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 12 ... Seal member, 13 ... Supply valve, 14 ... Energizing part, 26 ... Insertion port, 40 ... Filling member, 100 ... Ink cartridge, 110 ... Ink storage part , 120 ... cartridge body, 140 ... lid, 150 ... ink supply control means, 160 ... ink supply unit, 170 ... storage means, 180 ... engagement member, 210 ... Atmosphere side passage, 242 ... communication hole, 250 ... atmospheric valve portion, 270 ... atmosphere side accommodating portion, 272 ... wall, 274,276,278,302,304 ... communication portion, 275 ... Communication passage, 290 ... Supply side storage chamber, 292 ... First ink storage portion, 294 ... Second storage chamber, 296 ... Third storage chamber, 298 ... Passage, 400, 401 ... Ink inlet

Claims (5)

A method of manufacturing a liquid cartridge configured to be detachable from a liquid ejecting apparatus and supplying liquid to the liquid ejecting apparatus,
The liquid having a liquid supply unit for connection to the liquid ejecting apparatus, a supply side accommodation chamber communicating with the liquid supply unit, and an atmosphere side accommodation unit communicating with the supply side accommodation chamber and communicating with the atmosphere. A preparation step to prepare the cartridge;
Filling the atmosphere-side accommodation part with a filling member that has irregularities on the surface and does not absorb liquid, with a gap between the atmosphere-side accommodation part and the atmosphere-side accommodation part;
A depressurizing step for depressurizing at least the supply-side storage chamber;
A filling step in which only the supply-side storage chamber decompressed by the decompression step is filled with a liquid,
The supply-side accommodation chamber and the atmosphere-side accommodation portion are divided by a wall and communicated by a communication path. When air flows into the atmosphere-side accommodation portion, the air that has flowed is filled with the atmosphere-side accommodation portion. A method for producing a liquid cartridge, which passes through the gap with a member and further flows into the supply-side storage chamber through the communication path .   2. The liquid cartridge according to claim 1, further comprising an atmosphere release step of opening at least the atmosphere side accommodation portion to the atmosphere in the liquid cartridge in which the supply side accommodation chamber is filled with the liquid in the filling step. Production method.   The liquid cartridge manufacturing method according to claim 2, further comprising the step of packaging the liquid cartridge, in which the atmosphere-side accommodation unit is opened to the atmosphere by the atmosphere release step, in a reduced-pressure package. A liquid cartridge configured to be detachable from the liquid ejecting apparatus and for supplying 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 is open to the atmosphere;
The surface has irregularities, and the irregularity has a gap between the atmosphere side accommodation part and the atmosphere side accommodation part, and is filled in the atmosphere side accommodation part, and includes a filling member that does not absorb liquid,
The supply-side accommodation chamber and the atmosphere-side accommodation portion are divided by a wall and communicated by a communication path. When air flows into the atmosphere-side accommodation portion, the air that has flowed is filled with the atmosphere-side accommodation portion. A liquid cartridge, which passes through the gap with a member and further flows into the supply-side storage chamber through the communication path . The liquid cartridge according to claim 4, wherein the filling member is a porous member that is not communicated with a porous material.

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