JP2010208265A - Liquid storing container - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve stirring efficiency of liquid stored in a liquid storing container. <P>SOLUTION: A pair of ribs 116 and 117 in an ink storing room 110 are plate-like members with different heights in the vertical direction and approximately parallel under a condition that an ink cartridge 1 is mounted to an inkjet printer. An upper face 110a, a bottom face 110b, a right side face 110c, a left side face 110d, and the ribs 116 and 117 have the same depths. A pair of the ribs 116 and 117 are provided so that they are approximately at the central part in the longitudinal direction of the bottom face of the ink storing room 110, and pinches the ink guiding outlet 114 positioned near the bottom face therebetween. A pair of the ribs 116 and 117 are constituted so that the flow path resistance of an upper flow path 200 and the flow path resistance of an middle flow path 220 are smaller than the flow path resistance of a lower flow path 210. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid container that contains a liquid to be supplied to a liquid ejecting apparatus.

As a liquid container mounted on a liquid ejecting apparatus such as an ink jet printer, for example, an ink cartridge mounted on the ink jet printer is used. As an ink cartridge, for example, there is an ink cartridge in which an ink storage chamber for storing ink is divided into upper and lower parts, and each ink storage chamber communicates with a communication portion. In such an ink cartridge, when the ink cartridge is left unattended, the ink component settles, the lower ink becomes a dark ink having a high density, and the upper ink becomes a thin ink having a low density. In such a case, the dark ink and the light ink are not agitated and mixed, and variations occur in the darkness of the ink supplied to the inkjet printer. In order to solve this problem, the ink cartridge has, for example, a pair of wall portions that are vertically extended in the communication portion and the ink storage chamber, and a notch is formed below the wall portion. In some cases, a lower flow path in which the liquid flows below the wall portion and an upper flow path in which the liquid flows above the wall portion with a flow resistance smaller than the flow resistance of the lower flow path are formed. By doing so, the liquid flows in the vertical direction, and the settled dark ink and the floating thin ink are agitated and mixed, so that variation in the density of the ink supplied to the liquid ejecting apparatus is suppressed. (For example, patent document 1).

JP 2008-221853 A

  However, in the prior art, since a pair of wall portions are provided between the liquid inlet and the liquid outlet, the ink in the liquid container is appropriately mixed depending on the position where the liquid outlet is provided. Accordingly, there arises a problem in that the density of ink supplied to the liquid ejecting apparatus varies. For example, when the liquid outlet port is located in the vicinity of the center instead of the corner of the ink storage portion, the ink existing on the side different from the wall portion with respect to the liquid outlet port is not agitated and mixed. The dark ink that has settled in the lower part of the unit is supplied to the liquid ejecting apparatus first.

  The present invention has been made in view of the above-described problems, and an object thereof is to improve the mixing efficiency of the liquid stored in the liquid storage container.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

[Application Example 1]
A liquid storage container mounted on the liquid supply device, a liquid storage unit for storing a liquid, and an upper surface and a bottom surface facing in a vertical direction in a state where the liquid storage container is mounted on the liquid supply device; A liquid outlet that is provided near the bottom surface and that leads out of the liquid from the liquid holder to the outside; a pair of liquid outlets that are provided so as to sandwich the liquid outlet and extend in the vertical direction The pair of ribs is provided between the top surface and the bottom surface, and the top ends of the pair of ribs in the vertical direction are configured not to contact the top surface, and the pair of ribs The rib has an opening formed by making at least a part of the lower end not in contact with the bottom surface, or an opening formed by cutting out a part of the rib in the vicinity of the lower end. Configured to have The horizontal cross-sectional area of the space formed between the pair of ribs when the liquid container is mounted on the liquid supply device is configured to be larger than the area of the opening. A liquid container.

  According to the liquid container of Application Example 1, the pair of ribs are provided so as to sandwich the liquid outlet, and the horizontal cross-sectional area of the space formed between the pair of ribs is below the liquid container. It is comprised so that it may become larger than the area of the opening part currently formed in this. Accordingly, the liquid having a high concentration existing below flows from the lower part of the rib toward the liquid outlet, and the liquid having a lower concentration existing above is directed toward the liquid outlet via a space formed between the pair of ribs. Flowing. Therefore, the liquid can be flowed in the liquid storage portion regardless of the position where the liquid outlet is formed. Therefore, the liquid in the liquid container can be stirred and mixed as a whole, and variations in the concentration of the liquid supplied from the liquid container to the outside can be suppressed.

[Application Example 2]
In the liquid container of Application Example 1, the liquid container includes a first side surface and a second side surface that intersect with the top surface and the bottom surface, and a liquid inlet provided in the vicinity of the bottom surface, The rib is composed of a first rib provided on the first side surface side with respect to the liquid outlet port, and a second rib provided on the second side surface side with respect to the liquid outlet port, The liquid introduction port is provided at a position closer to the first side surface than the first rib among the pair of ribs, and between the first side surface and the first rib, the vertical direction At least one third rib extending in the vertical direction, and the upper end of the third rib in the vertical direction is configured not to contact the upper surface, and the third rib is at least a part of the lower end. Formed so as not to contact the bottom surface, or An opening formed by cutting out a part of the rib is formed in the vicinity of the lower end, and the first rib and the at least one third rib have a height in the vertical direction. They are provided so as to be different from each other and from the liquid outlet to the liquid inlet in order of height. According to the liquid container of Application Example 2, a plurality of ribs are provided between the liquid outlet and the liquid inlet in order of increasing height from the liquid outlet to the liquid inlet. Therefore, even when the liquid level drops, the thin liquid and the thick liquid are mixed and led out from the liquid outlet. Accordingly, since the liquid can be mixed and led out until the liquid is almost eliminated, variation in the concentration of the liquid supplied to the liquid ejecting apparatus can be suppressed.

[Application Example 3]
The liquid container of Application Example 2 includes at least one fourth rib extending in a vertical direction between the second side surface and the second rib, and the vertical of the fourth rib. An upper end of the direction is configured not to contact the upper surface, and the fourth rib is an opening formed by being configured so that at least a part of the lower end does not contact the bottom surface, or An opening formed by cutting out a part of the rib is formed in the vicinity of the lower end. The second rib and the at least one fourth rib have a height in the vertical direction. They are provided so as to be different from each other and in descending order from the liquid outlet to the second side surface. According to the application example 3, the fourth rib having a height different from the second rib in the vertical direction between the second side surface and the second rib is directed from the liquid outlet to the first side surface. It is provided in order of height. Therefore, a thin liquid and a dark liquid can be mixed and led out from the liquid outlet on both sides of the first and second side surfaces of the liquid outlet. Therefore, the mixing efficiency of the liquid can be further improved.

[Application Example 4]
In the liquid container of Application Example 2 or Application Example 3, the vertical height of the second rib is configured to be lower than the vertical height of the first rib. According to the liquid container of Application Example 4, the liquid flow path resistance between the first rib and the upper surface of the liquid storage portion is the same as that of the second rib provided near the liquid inlet and the liquid storage. It becomes smaller than the flow path resistance of the liquid between the upper surface of the part. Accordingly, since the liquid can be actively moved even in a portion where the liquid does not move, the stirring efficiency of the liquid can be improved.

[Application Example 5]
In the liquid container of Application Example 1, the liquid container includes a first side surface and a second side surface that intersect with the top surface and the bottom surface, and a liquid inlet provided in the vicinity of the bottom surface, Among the ribs, the height in the vertical direction of the second rib provided on the second side surface with respect to the liquid outlet port is the first height provided on the first side surface side with respect to the liquid outlet port. The liquid introduction port is provided at a position closer to the first side surface than the first rib of the pair of ribs. It has been. According to the liquid container of Application Example 5, the first rib provided far from the liquid inlet is configured to be lower than the second rib. Therefore, the flow resistance of the liquid between the first rib and the upper surface of the liquid storage portion is such that the liquid flow between the second rib provided near the liquid inlet and the upper surface of the liquid storage portion. It becomes smaller than the road resistance. Therefore, the liquid can be positively moved even in a portion where the liquid does not move so much that the liquid stirring efficiency can be improved.

[Application Example 6]
In the liquid container according to any one of Application Example 1 to Application Example 5, the liquid outlet is formed at a substantially center in the longitudinal direction of the bottom surface. According to the liquid container of Application Example 6, the liquid outlet port is formed in the vicinity of the bottom surface at the substantially center in the longitudinal direction of the bottom surface, and the first rib and the second rib are sandwiched between the liquid outlet port. Ribs (a pair of ribs) are provided. Therefore, even if the liquid outlet is formed near the center below the liquid storage part, the liquid can flow in the liquid storage part. Therefore, the liquid in the liquid container can be stirred as a whole.

[Application Example 7]
The liquid container according to any one of Application Examples 1 to 6, wherein the opening is configured by a notch formed in the rib. According to the liquid container of Application Example 7, the opening is configured by a notch formed in the rib. Therefore, the opening can be configured easily.

[Application Example 8]
The liquid container according to any one of Application Examples 1 to 7, wherein the liquid is pigment ink. In the pigment ink, an ink component having a high specific gravity tends to settle, and as a result, the ink below the liquid container becomes a dark ink having a high concentration and the ink above becomes a thin ink having a low concentration. Therefore, according to the sixth application example, it is possible to supply to the liquid ejecting apparatus after mixing the ink whose density is different in the vertical direction due to the sedimentation of the ink component. Therefore, the color change of the pigment ink ejected from the liquid ejecting apparatus can be suppressed.

FIG. 3 is an external perspective view of an ink cartridge as a liquid container according to the first embodiment. FIG. 2 is an external perspective view of the ink cartridge according to the first embodiment shown in FIG. FIG. 2 is an exploded perspective view of the ink cartridge according to the first embodiment corresponding to FIG. 1. FIG. 3 is a diagram illustrating a state where the ink cartridge according to the first embodiment is attached to the cartridge mounting portion. FIG. 2 is a plan view of the cartridge body 10 in the first embodiment. FIG. 2 is a plan view of the cartridge body 10 in the first embodiment. FIG. 3 is a partially enlarged view of the cartridge body 10 in the first embodiment. It is explanatory drawing explaining the mixing of the ink in the ink accommodating part accompanying the ink supply to the liquid supply part 50 in 1st Example. The top view explaining the structure of the cartridge main body 10a in 2nd Example. Explanatory drawing explaining mixing of the ink in the ink accommodating part accompanying the ink supply to the liquid supply part 50 in 2nd Example. The top view explaining the structure of the cartridge main body 10b in a modification (1).

A. First embodiment:
A1. Ink cartridge configuration:
FIG. 1 is an external perspective view of an ink cartridge as a liquid container according to the first embodiment. FIG. 2 is an external perspective view of the ink cartridge according to the first embodiment shown in FIG. FIG. 3 is an exploded perspective view of the ink cartridge according to the first embodiment corresponding to FIG. FIG. 4 is a diagram illustrating a state where the ink cartridge according to the first embodiment is attached to the cartridge mounting portion. 1 to 4 show XYZ axes orthogonal to each other in order to specify the posture (direction) of the ink cartridge. The ink cartridge 1 contains liquid ink therein.

  As shown in FIGS. 1 and 2, the ink cartridge 1 has a substantially rectangular parallelepiped shape, and includes an upper surface 1a, a bottom surface 1b, a right side surface (first side surface) 1c, a left side surface (second side surface) 1d, and a front surface (third side surface). ) 1e and back (fourth side) 1f. The top surface 1a is the Z-axis positive direction side surface, the bottom surface 1b is the Z-axis negative direction side surface, the right side surface 1c is the X-axis positive direction side surface, the left side surface 1d is the X-axis negative direction side surface, and the front surface 1e is Y The surface on the positive axis side and the back surface 1f are in contact with the negative surface on the Y axis. The top surface 1a and the bottom surface 1b, the first side surface 1c and the second side surface 1d, and the third side surface 1e and the fourth side surface 1f face each other. The top surface 1a and the bottom surface 1b are surfaces that intersect with the first to fourth side surfaces 1c to 1f. The first side surface 1c and the second side surface 1d are surfaces that intersect the upper surface 1a, the bottom surface 1b, the third side surface 1e, and the fourth side surface 1f. In addition, the side with each surface 1a-1f is also called the upper surface side, the bottom surface side, the right side surface side, the left side surface side, the front side, and the back side, respectively.

  As shown in FIG. 3, the ink cartridge 1 includes a cartridge body 10 and a lid member 20 that covers the front side of the cartridge body 10. On the front side of the cartridge body 10, three ink storage chambers 100, 110, and 120 that store ink, an air introduction portion 140 that functions as an air communication portion that connects the air and the ink storage chamber, and a plurality of ribs 116 are provided. 117, 126, 127 are formed. A film 80 that covers the front side of the cartridge body 10 is provided between the cartridge body 10 and the lid member 20.

  A liquid supply unit 50 having a supply hole for supplying ink to the ink jet printer is provided on the bottom surface 1b. The bottom surface 1b further has an air opening 142 for introducing the air into the ink cartridge 1 (FIG. 3). The liquid supply unit 50 and the atmosphere opening port 142 are sealed with sealing films 54 and 90, respectively, when the ink cartridge 1 is not used.

  As illustrated in FIG. 4, the ink cartridge 1 is mounted on, for example, a cartridge mounting unit 400 of an ink jet printer and supplies ink to the ink jet printer. The cartridge mounting unit 400 may be provided on the carriage of the printer (so-called on-carriage) or may be provided on a location different from the carriage (so-called off-carriage).

  The sealing film 90 is peeled off by the user before the ink cartridge 1 is mounted on the cartridge mounting portion 400 of the ink jet printer. As a result, the ink storage chamber provided inside the ink cartridge 1 communicates with the outside of the ink cartridge 1 through the atmosphere opening port 142, and the atmosphere is introduced into the ink cartridge 1. The sealing film 54 is configured to be broken by an ink supply needle provided in the cartridge mounting portion when the ink cartridge 1 is mounted in the cartridge mounting portion 400 of the ink jet printer.

  The configuration of the ink storage chambers 100, 110, and 120 and the ink flow will be described with reference to FIGS. 5 and 6 are plan views of the cartridge body 10 in the first embodiment. FIG. 5 is a view of the cartridge body 10 as seen from the front side, and FIG. 6 is a view of the cartridge body 10 as seen from the back side. FIG. 7 is a partially enlarged view of the cartridge body 10 in the first embodiment.

  As shown in FIG. 5, the first ink storage chamber 100 includes an air introduction port 102 and an ink outlet port 104. The second ink storage chamber 110 includes an ink inlet 112, an ink outlet 114, and a plurality of ribs 116 and 117. The third ink storage chamber 120 includes an ink inlet 122, an ink outlet 124, and a plurality of ribs 126 and 127. In addition, the air introduction unit 140 includes an air release port 142 and a storage chamber communication hole 144. When the film 80 (FIG. 3) is affixed densely so that no gaps are formed on the front end surfaces of the ribs 116, 117, 126, 127 of the cartridge body 10, the ribs 116, 117, 126, 127 and the film 80 A communication portion (flow path) for allowing ink and air to flow is formed inside the ink cartridge 1. Further, the outer surface film 60 is affixed so as to cover substantially the entire back side of the cartridge body 10.

  The second ink storage chamber 110 includes an upper surface 110a, a bottom surface 110b, a right side surface 110c, a left side surface 110d, a front surface 110e, and a back surface 110f. The front surface (third side surface) 110 e is formed by the film 80, and the back surface (fourth side surface) 110 f is formed by the film 60. The upper surface 110a is a Z-axis positive direction surface, the bottom surface 110b is a Z-axis negative direction surface, the right side surface 110c is an X-axis positive direction surface, the left side surface 110d is an X-axis negative direction surface, and the front surface 110e is Y The surface on the positive side in the axial direction and the back surface 110f are in contact with the surface on the negative direction side in the Y axis. The top surface 110a and the bottom surface 110b, the first side surface 110c and the second side surface 110d, and the third side surface 110e and the fourth side surface 110f face each other. The upper surface 110a and the bottom surface 110b are opposed to each other in the vertical direction (the Z direction in the drawing). The top surface 110a and the bottom surface 110b are surfaces that intersect with the first to fourth side surfaces 110c to 110f. The first side surface 110c and the second side surface 110d are surfaces that intersect the upper surface 110a, the bottom surface 110b, the third side surface 110e, and the fourth side surface 110f.

  The plurality of ribs 116 and 117 are substantially parallel plate-like members having substantially the same height in the vertical direction (Z direction in the drawing) in a state where the ink cartridge 1 is mounted on the ink jet printer. The vertical direction represents the vertical direction (± Z direction) when the ink cartridge 1 is mounted on the ink jet printer, and the horizontal direction represents the left and right direction (± X direction) when the ink cartridge 1 is mounted on the ink jet printer. . The top surface 110a, the bottom surface 110b, the right side surface 110c, the left side surface 110d, and the depth (length in the Y direction in the drawing) of the ribs 116 and 117 are the same. The pair of ribs 116 and 117 are both provided between the upper surface 110a and the bottom surface 110b. The first rib 116 is provided between the ink outlet 114 and the ink inlet 112. The second rib 117 is provided on the side opposite to the ink inlet 112 with respect to the ink outlet 114.

  The ink outlet 114 is formed at the approximate center in the longitudinal direction (± X direction) of the bottom surface 110b and in the vicinity of the bottom surface 110b. This state will be described as follows with reference to the surfaces 110a to 110d of the ink storage chamber 110. The ink outlet 114 is formed near the bottom surface 110b and between the first side surface 110c and the second side surface 110d. The ink introduction port 112 is provided near the bottom surface 110 b and between the first side surface 110 c and the first rib 116. The first rib 116 and the second rib 117 are provided on the first side surface 110c side and the second side surface 110d side of the ink outlet 114, respectively. That is, the first rib 116 and the second rib 117 are provided so as to sandwich the ink outlet 114. In the first embodiment, the rib 116 corresponds to the “first rib” in the claims, and the rib 117 corresponds to the “second rib” in the claims. In the first embodiment, the ribs 116 and 117 are provided so as to extend vertically upward from the bottom surface 110b and away from the top surface 110a (in other words, not in contact with the top surface 110a). Further, as shown in FIG. 7, the ribs 116 and 117 are formed with notches 116 a and 117 a that are notched vertically downward. In the first embodiment, the notches 116a and 117a correspond to “openings” in the claims.

  A space 200 above the ink storage chamber 110 including a space between the upper end of the rib and the upper surface 110a, and a space 210 below the bottom surface of the ink storage chamber 110 including a space between the notches 116a and 117a and the bottom surface 110b. The spaces 220 formed between the ribs 116 and the ribs 117 function as ink flow paths for allowing ink to flow from the ink inlet 112 toward the ink outlet 114, respectively. In the first embodiment, the upper space 200, the lower space 210, and the space 220 between the ribs 116 and 117 are referred to as the upper flow path 200, the lower flow path 210, and the middle flow path 220, respectively. In order to positively guide the ink existing above the ink storage chamber 110 at a position away from the ink outlet 114 to the ink outlet 114, the channel resistance of the upper channel 200 and the channel resistance of the middle channel 220 are downstream. It is preferable that the flow path resistance of the path 210 is smaller. In the first embodiment, the vertical cross-sectional area S1 between the pair of ribs 116 and 117 and the upper surface 110a and the horizontal cross-sectional area S3 of the middle flow path 220 are the minimum cross-sectional area of the lower flow path 210. By configuring it to be larger than the area S2 of the notch 116a, the channel resistance of the upper channel 200 and the middle channel 220 is configured to be smaller than the channel resistance of the lower channel 210. Furthermore, in the first embodiment, the sectional area S1 is configured to be larger than the sectional area S3, in other words, the channel resistance of the upper channel 200 is smaller than the channel resistance of the middle channel 220. .

  Similarly to the second ink storage chamber 110, the third ink storage chamber 120 also includes a pair of substantially parallel ribs 126 and 127 that extend in the vertical direction with the ink cartridge 1 mounted on the ink jet printer. . The pair of ribs 126 and 127 correspond to the pair of ribs 116 and 117 of the second ink storage chamber 110. The ink inlet 122 and the ink outlet 124 correspond to the ink inlet 112 and the ink outlet 114 of the second ink storage chamber 110. In the third ink storage chamber 120, similarly to the ink storage chamber 110, an upper flow path 250, a lower flow path 260, and a middle flow path 270 that function as ink flow paths are formed. Since the configuration of the third ink storage chamber 120 is the same as the configuration of the second ink storage chamber 110, detailed description thereof is omitted.

  Further, as shown in FIG. 6, a plurality of grooves 160, 162, 164, and 166 are formed on the back side of the cartridge body 10. These grooves 160, 162, 164, and 166 allow various flow paths such as ink and air to flow between the cartridge body 10 and the outer surface film 60 when the outer surface film 60 is attached. Forming a channel for the purpose. The groove 160 communicates the storage chamber communication hole 144 and the air introduction port 102, the groove 162 communicates the ink outlet 104 and the ink introduction port 112, and the groove 164 communicates with the ink outlet 114. The ink inlet 122 communicates with the groove 166, and the groove 166 functions as a flow path that communicates the ink outlet 124 and the supply inlet 171.

  The flow path 170 is provided inside the cartridge body 10 and communicates the supply inlet 171 and the liquid supply unit 50. The flow path 170 functions as a flow path for supplying ink from the third ink storage chamber 120 to the liquid supply unit 50 via the flow path formed by the ink outlet 124 and the groove 166 and the supply inlet 171.

  When the ink jet printer starts printing with the atmosphere opening port 142 communicating with the atmosphere, ink is supplied from the liquid supply unit 50 to the recording head of the ink jet printer through the ink supply needle. When ink is supplied from the liquid supply unit 50, the ink flows from the third ink storage chamber 120 to the liquid supply unit 50 via the ink outlet port 124, and the ink is supplied to the ink supply needle inserted into the liquid supply unit 50. Is done.

  In accordance with the ink flow, the ink in the second ink storage chamber 110 is supplied to the third ink storage chamber 120 via the ink outlet port 114, the groove 164, and the ink introduction port 122. Ink is supplied to the second ink storage chamber 110 through the ink outlet 104, the groove 162, and the ink inlet 112. As the ink in the first ink storage chamber 100 is consumed, the air in the air introduction unit 140 flows into the first ink storage chamber 100 through the storage chamber communication hole 144, the groove 160 and the air introduction port 102. As the ink is supplied from the liquid supply unit 50 to the recording head of the ink jet printer, the liquid level of the first ink storage chamber 100 is lowered, but the ink outlet 104 is provided below the first ink storage chamber 100. Air does not flow into the second ink storage chamber 110 until all the ink in the first ink storage chamber 100 moves to the second ink storage chamber 110 (all the ink in the first ink storage chamber 100 is consumed).

  When all of the ink in the first ink storage chamber 100 is consumed and the ink in the second ink storage chamber 110 starts to be consumed, the ink in the first ink storage chamber 100 passes through the ink outlet 104, the groove 162, and the ink inlet 112. Air flows into the second ink storage chamber 110. Similarly, when all the ink in the second ink storage chamber 110 is consumed and the ink in the third ink storage chamber 120 starts to be consumed, the second ink storage is performed via the ink outlet 114, the groove 164, and the ink inlet 122. Air in the chamber 110 flows into the third ink storage chamber 120. That is, the ink in the cartridge body 10 is consumed in the order of the first ink storage chamber 100, the second ink storage chamber 110, and the third ink storage chamber 120.

A2. About ink mixing:
How the ink is stirred and supplied in the second ink storage chamber 110 of the cartridge body 10 described above will be described with reference to FIG. FIG. 8 is an explanatory diagram for explaining the mixing of ink in the second ink storage portion accompanying the ink supply to the liquid supply portion 50 in the first embodiment. FIG. 8A shows a state in which the second ink storage chamber 110 is filled with ink. Pigment ink is contained in the ink cartridge 1. Since the pigment contained in the pigment ink tends to settle, the lower ink in each of the ink storage chambers 100, 110, 120 is a dark ink having a high density, and the upper ink is a thin ink having a low density. Hereinafter, the high density ink present in the lower part of the ink cartridge 1 is simply referred to as “dark ink”, and the low density ink present in the upper part is simply referred to as “thin ink”.

  When the ink cartridge 1 is mounted on the printer and the ink is not supplied for a long period of time, the ink component settles, and the lower ink has a high density as shown in FIG. The upper ink becomes a thin ink with a low density. When the supply of ink to the liquid supply unit 50 is started in a state where the ink in the first ink storage chamber 100 remains, the ink in the second ink storage chamber 110 is supplied to the third ink storage chamber 120, The ink in the two ink storage chamber 110 is supplied to the second ink storage chamber 110. At this time, the ink in the second ink storage chamber 110 flows from the middle flow path 220 and the lower flow path 210 to the ink outlet 114. At this time, thin ink flows from the upper flow path 200 to the middle flow path 220 as indicated by arrows R1, R2, and R3, and dark ink flows through the lower flow path 210 as indicated by arrows R4 and R5.

  After all the ink in the first ink storage chamber 100 is consumed, the ink stored in the second ink storage chamber 110 starts to be consumed, and as shown in FIG. 8B, the ink level S is at the position P1. Even when the pressure drops to the upper limit, the ink flows as in FIG.

  Thus, by providing the pair of ribs 116 and ribs 117 so as to sandwich the ink outlet 114, the ink outlet 114 is indicated by the arrows R1, R2, R3, R4, and R5. In the lower flow path 210 and the middle flow path 220, it is possible to generate an ink flow from both sides of the ink outlet 114 (in the horizontal direction in the drawing) toward the ink outlet 114. As a result, the ink in the ink storage chamber 110 can be stirred and mixed as a whole.

  Further, when the ink is consumed, the ink level becomes a position P2 lower than the height of the ribs 116 and 117, as shown in FIG. In the state shown in FIG. 8C, ink does not flow from the upper flow path 200 to the middle flow path 220. When ink is supplied to the liquid supply unit 50 in this state, the dark ink and the thin ink remaining in the middle flow path 220 flow toward the ink outlet 114 as indicated by the arrow R6, and exist outside the middle flow path 220. As shown by the arrow R7, the dark ink and the thin ink that flow flow from the lower flow path 210 toward the ink outlet 114. Since the thin ink and the dark ink are agitated to some extent until the state shown in FIG. 8C is reached, the remaining ink in the state shown in FIG. It has become. In this way, ink having an appropriate concentration is derived until the ink is exhausted in the ink storage chamber 110.

  The effects of the first embodiment described above will be described in more detail while comparing with the case where only one of the ribs 116 and 117 is provided. When only one of the ribs 116 and 117 is provided, ink flow hardly occurs on the side where the rib is not provided. As a result, since the dark ink and the light ink are not stirred and mixed, the dark ink below is supplied first. Therefore, variations occur in the concentration of ink supplied to the ink jet printer.

  On the other hand, according to the ink cartridge 1 of the first embodiment, the flow resistance of the upper flow path 200 and the middle flow path 220 is larger than the flow resistance of the lower flow path 210 so as to sandwich the ink outlet 114. A pair of ribs 116 and 117 are provided so as to be smaller. Accordingly, the dark ink having a high density existing below flows from both sides of the ink outlet 114 toward the ink outlet 114 via the lower channel 210, and the thin ink having a low density existing above the upper channel 200 and the middle stream. It flows from vertically above toward the ink outlet 114 through the path 220. As a result, an overall ink flow is generated in the ink storage chamber 110. Therefore, the ink in the ink storage chamber 110 can be stirred and mixed as a whole, and variations in the density of ink supplied from the cartridge body 10 to the ink jet printer, in other words, changes in color density can be suppressed.

  In the first embodiment, the cross-sectional area S1 is larger than the cross-sectional area S3. In other words, the flow path resistance of the upper flow path 200 is smaller than the flow path resistance of the middle flow path 220. . On the other hand, in the first embodiment, the depth of the ink storage chamber 110 (the length in the Y direction in the drawing) is the same throughout the ink storage chamber. Therefore, if it is configured so that S1> S3, the distance d0 between the upper end of the rib 116 and the upper surface 110a (or the distance between the upper end of the rib 117 and the upper surface 110a) d0 is set to be equal to the rib 116 and the rib 117. It can be made larger than the distance d3. The ink sandwiched between the rib 116 and the rib 117 is not easily stirred and flows out to the ink outlet 114 as it is. Therefore, it is preferable that the volume of ink sandwiched between the rib 116 and the rib 117 is as small as possible. In order to satisfy S3> S2, even if the distance d3 between the rib 116 and the rib 117 is increased to some extent, if this is increased too much, the volume of ink sandwiched between the rib 116 and the rib 117 will increase. That is, the distance d3 should not be too large. Further, if the height of the rib 116 and the rib 117 in the vertical direction (the length in the Z direction in the drawing) becomes too large, the time until the state of FIG. 8A reaches the state of FIG. 8C is shortened. In addition, the volume of ink sandwiched between the rib 116 and the rib 117 is increased. Therefore, while the space between the rib 116 and the rib 117 needs to be high enough to function as the middle flow path 220, the distance between the upper end of the rib 116 and the upper surface 110a (or the rib 117). The distance (d0) between the upper end and the upper surface 110a is preferably as large as possible. At this time, as in the first embodiment, when the depth (length in the Y direction in the drawing) of the ink containing chamber 110 is the same over the entire ink containing chamber, it is configured so that S1> S3. It is possible to satisfy d0> d3, and it is possible to easily satisfy the conditions that the distance d3 is not increased too much and the distance d0 is increased as much as possible.

  Further, in the first embodiment, the horizontal cross-sectional area S3 of the middle flow path 220 formed between the pair of ribs 116 and 117 is cut between the lower end portion of the ink storage chamber 110 and the ribs 116 and 117. By configuring so as to be larger than the area S2 of the notches 116a and 117a, the channel resistance of the middle channel 220 is configured to be smaller than the channel resistance of the lower channel 210. Therefore, the channel resistance can be set with a simple configuration.

Further, according to the ink cartridge 1 of the first embodiment, the ribs 116 and 117 are configured so as not to contact the upper surface 110a and to contact the bottom surface 110b and to have openings (notches 116a and 117a). . Therefore, the upper flow path and the lower flow path can be configured easily, and the flow resistance (the flow rate of ink flowing between the rib and the upper surface and the flow rate of ink flowing through the notch) can be easily set.

  The configuration of the ink cartridge 1 of the first embodiment is particularly suitable for liquids containing ink components having different specific gravity, such as pigment ink. Since the ink component having a high specific gravity tends to settle, the ink existing below the ink storage chamber 110 becomes a dark ink having a high concentration, and the ink existing above the ink storage chamber 110 becomes a thin ink having a low concentration. According to the ink cartridge 1 of the first embodiment, since the ink in the ink storage chamber 110 can be mixed and then supplied to the ink jet printer, the color change of the pigment ink ejected from the ink jet printer can be suppressed.

B. Second embodiment:
In the first embodiment, only the pair of ribs 116 and 117 (or the pair of ribs 126 and 127) are provided in the ink storage chamber 110 (or the ink storage chamber 120). In addition to the ribs, ribs are provided.

  FIG. 9 is a plan view illustrating the configuration of the cartridge main body 10a in the second embodiment. FIG. 10 is an explanatory diagram for explaining ink mixing in the second embodiment. As shown in FIG. 9, in the cartridge main body 10 a, ribs 128, 129, 130, and 131 are provided in the third ink storage chamber 120 in addition to the pair of ribs 126 and 127. Other than that, it has the same configuration as the cartridge body 10 of the first embodiment. The ribs of the second ink storage chamber 110 are not shown. The second ink storage chamber 110 may be provided with only a pair of ribs as in the second ink storage chamber 110 of the first embodiment, or the same as the third ink storage chamber 120 of the second embodiment. Ribs may be provided in addition to the pair of ribs. Of the ribs 127, 126, 128, 129, 130, and 131, the ribs 126, 128, and 129 provided on the right side (first side) 120 c side of the ink outlet port 124, that is, the ink introduction port 122 side, are ink guides. It is provided such that the height in the vertical direction (Z direction) decreases from the outlet 124 toward the ink inlet 122. Ribs 127, 130, 131 provided on the left side (second side) 120 d side of the ink outlet 124 are perpendicular to the left side (second side) 120 d from the ink outlet 124 in the vertical direction (Z direction). The height is set low. The configuration of the ribs 128, 129, 130, and 131 is the same as that of the rib 126 except that the height in the vertical direction is different. In the second embodiment, the ribs 128 and 129 correspond to the “third rib” in the claims, and the ribs 130 and 131 correspond to the “fourth rib” in the claims.

  When the ink cartridge 1 is mounted on the printer and the ink is not supplied for a long period of time, the ink component settles, and the lower ink is dark (dark ink) as shown in FIG. And the upper ink becomes thin (thin ink). When the supply of ink to the liquid supply unit 50 is started, in the third ink storage chamber 120, the thin ink above the arrows R11 and R12 moves toward the ink outlet 124 via the upper flow path 250 and the middle flow path 270. The lower dark ink flows and flows toward the ink outlet 124 through the lower flow path 260 as indicated by an arrow R13.

  The thin ink that has flowed to the vicinity of the ink outlet 124 through the upper flow path 250 and the middle flow path 270 is mixed with the dark ink that has flowed from the lower flow path 260 to the vicinity of the ink outlet 124 to obtain an appropriate color density and liquid. Supplied to the supply unit 50.

  If the ink in the third ink storage chamber 120 is continuously consumed in a state where all the ink in the second ink storage chamber 110 has been consumed, the liquid level of the ink is lowered accordingly, and FIG. As shown in FIG. 5, the position P1 is lower than the height of the ribs 126 and 127 having the highest height. In this state, the ink existing in the middle flow path 270 flows toward the ink outlet 124 as indicated by R15, but the thin ink does not flow from the upper flow path 250 to the middle flow path 270, and the thin ink staying above As indicated by an arrow R14, the ink flows through the flow path formed between the rib 127 and the rib 130 and between the rib 126 and the rib 128 toward the ink outlet port 124. The dark ink flows from the notches formed below the ribs 128 and 130 through the lower flow path 260, between the ribs 127 and 130, and between the ribs 126 and 128, as indicated by an arrow R <b> 16. As a result, the dark ink and the thin ink are mixed between the rib 127 and the rib 130, and the rib 126 and the rib 128, and the mixed ink flows through the notch of the rib 126 and 127 to the ink outlet port 124 to supply the liquid. Supplied to the unit 50.

  When the ink in the third ink storage chamber 120 is further consumed from the state shown in FIG. 10B, the ink liquid level is lowered, and as shown in FIG. , 130 becomes a position P2 lower than the height. In the state shown in FIG. 10C, the thin ink flows from above between the rib 128 and the rib 129 and between the rib 130 and the rib 131 as shown by the arrow R17, and the dark ink is shown by the arrow R18. In addition, the air flows from the lower flow path 260 between the ribs 128 and 129 and between the ribs 130 and 131 through notches formed below the ribs 129 and 131. As a result, the dark ink and the thin ink are mixed between the rib 128 and the rib 129 and between the rib 130 and the rib 131, and the mixed ink flows through the lower flow path 260 and is supplied to the liquid supply unit via the ink outlet 124. 50.

  In the second embodiment, the third rib (the ribs 128 and 129 provided between the first rib 126 and the first side surface 120c) and the fourth rib (the second rib 127 and the second side surface 120d). Both of the ribs 130 and 131) provided between the first rib and the third rib are provided, but only the third rib or the fourth rib may be provided. Further, the number of third ribs and the number of fourth ribs are not limited to two, and may be one or three or more.

  According to the cartridge main body 10a of the second embodiment, a plurality of ribs 126, 128, and 129 are provided in descending order from the ink outlet port 124 toward the ink inlet port 122. Ribs 127, 130, and 131 are provided on the side opposite to the ink introduction port 122 in descending order of height. Accordingly, since the upper flow path 250 becomes wider as the rib height is lowered, even when the ink level is lowered, the thin ink above the third ink storage chamber 120 does not move from the upper flow path 250 to the ink. The dark ink in the lower part of the ink storage chamber 120 flows toward the outlet port 124 and flows from the lower flow path 260 toward the ink outlet port 124. As a result, the light ink and the dark ink are mixed and led out from the ink outlet 124. Therefore, since the ink can be continuously mixed and led out from the third ink storage chamber 120 until almost no ink is present, variation in the density of the ink supplied to the ink jet printer, in other words, color change can be suppressed. it can.

C. Variation:
(1) In the embodiment, the pair of ribs 116 and 117 (or the pair of ribs 126 and 127) have substantially the same height in the vertical direction, but the pair of ribs are configured to have different heights. Also good. FIG. 11 is a plan view illustrating the configuration of the cartridge main body 10b in the modification (1). Of the pair of ribs 416 and 417 of the third ink storage chamber 120, the cartridge main body 10b has the second rib 417 provided on the left side (second side) 120d side of the ink outlet 124 being the ink guide. The height of the outlet 124 in the vertical direction is lower than that of the first rib 416 provided on the right side (first side) 120c side. In other words, the rib 417 which is physically far from the ink introduction port 122 has a lower height in the vertical direction than the rib 416. Other than that, it has the same configuration as the cartridge body 10 of the first embodiment. Note that the pair of ribs of the second ink storage chamber 110 is not shown. The pair of ribs of the second ink storage chamber 110 may be ribs having the same height as the pair of ribs 116 and 117 of the second ink storage chamber 110 of the first embodiment, or may be modified (1 ) May be ribs having different heights such as a pair of ribs 416 and 417 of the third ink storage chamber 120.

  The cartridge main body 10 b of Modification Example (1) is provided with a first rib 416 provided at a position near the ink introduction port 122 and a first position provided at a position farther from the ink introduction port 122 than the first rib 416. 2 ribs 417. The first rib 416 and the second rib 417 are provided so as to sandwich the ink outlet 124. The upper flow path 250 is configured as a flow path through which ink flows, and includes a first upper flow path 416a in the vicinity of the first rib 416 and a second upper flow path 417a in the vicinity of the second rib 417. In this modification, the height (depth) in the Y direction of the first upper flow path 416a and the second upper flow path 417a is the same. Therefore, the distance d2 between the second rib 417 and the upper surface 120a of the ink storage chamber 120 is configured to be larger than the distance d1 between the first rib 416 and the upper surface 120a of the ink storage chamber 120. Thus, the cross-sectional area of the second upper flow path 417a in the vertical direction is made larger than the cross-sectional area of the vertical cross-section of the first upper flow path 416a, and the flow resistance of the second upper flow path 417a is higher than that of the first upper flow path 416a. It is made smaller than channel resistance.

  In the cartridge main body 10b having the above configuration, when ink is supplied to the ink jet printer, a flow indicated by an arrow R10 is generated in the upper flow path 250. In the modified example (1), a motion (flow) can be generated in the dark ink and the thin ink that are distributed in layers in the vertical direction according to the density. Therefore, the stirring efficiency of the liquid flowing through the upper flow path 250 can be improved. In general, there is little ink movement at a position away from the ink inlet 122. In the modified example (1), since the ink introduction port 122 is provided at a position closer to the bottom surface 120b than the top surface 120a, the ink movement on the top surface 120a side of the third ink storage chamber 120 is less than that on the bottom surface 120b side. . Furthermore, in the modified example (1), the ink introduction port 122 is provided at a position closer to the right side surface (first side surface) 120c than the left side surface (second side surface) 120d. The surface (second side) 120d side has less ink movement than the right side (first side) 120c side. That is, in the modified example (1), the flow resistance of the second upper flow path 417a on the left side (second side) 120d side where the ink movement is smaller among the upper part of the ink storage chamber 120 where the ink movement is small, It is made smaller than the channel resistance of the first upper channel 416a on the right side (first side) 120c side. Therefore, according to the configuration of the modified example (1), the ink can be more actively flowed and stirred in a portion where the movement of the ink is smaller.

(2) In the embodiment, ribs are provided in the two ink storage chambers of the second ink storage chamber 110 and the third ink storage chamber 120. For example, the rib is provided in at least one ink storage chamber. What is necessary is just to be provided. Regardless of the ink storage chamber, the ink mixing efficiency of the entire cartridge body 10 can be improved. In addition, with respect to the flow of ink, when the atmosphere opening 142 side is the upstream side and the liquid supply unit 50 side is the downstream side, and a plurality of ink storage chambers are provided along this flow, the ribs are located on the more downstream side. It is preferable to be provided in the storage chamber. If a rib is provided in the ink storage chamber located on the further downstream side, the ink can be agitated at a site closer to the ink jet printer, so that variations in the concentration of ink supplied to the ink jet printer can be efficiently suppressed. In the embodiment, the three ink storage chambers 100, 110, and 120 are provided, but the number is not limited to three, and may be one, two, or four or more.

(3) In the embodiment, the lower flow path 210 is formed by a notch, but a notch is not formed and a rib may be provided apart from the bottom surface. In this case, in order to configure the flow path resistance of the upper flow path 200 to be smaller than the flow path resistance of the lower flow path 210, the vertical width (height) of the lower flow path 210 is equal to the vertical width (height) of the upper flow path 200. ) Or a member (for example, a plurality of projecting members) serving as a resistance is provided on the flow path.

(4) In the embodiment, the ribs 116, 117 and the like are provided so as not to contact the upper surface 110a, so that the upper flow path 200 is configured between the ribs 116, 117 and the upper surface 110a. The upper flow path 200 may be configured by extending 117, etc. from the bottom surface 110b to the top surface 110a and also forming a notch by notching the top. Moreover, it is good also considering not the notch but the through-hole penetrated so that it may penetrate a rib as an opening part. The upper flow path may also be configured by an opening.

(5) In the description of the above-described embodiments and modifications, the configuration of the second ink storage chamber 110 can be applied to the configuration of the third ink storage chamber 120, and the configuration of the third ink storage chamber 120 is the first. This can be applied to the two-ink storage chamber 110. The configuration of the second ink storage chamber 110 and the third ink storage chamber 120 is different from the first ink storage chamber 100 or the ink storage chamber (not shown) and the ink cartridge 1 in an ink cartridge having a different arrangement and shape of the ink storage chamber. Needless to say, this is applicable.

(6) In the embodiment, the ink cartridge 1 has a substantially rectangular parallelepiped shape, but the corners of the rectangular parallelepiped are notched, the corners are rounded, and the surfaces 1a to 1f are inclined (for example, the surface 1a is inclined with respect to the side surfaces 1c and 1d). The shape of the appearance may be changed by crossing at an angle other than 90 degrees. In the embodiment, the ink cartridge 1 is roughly configured by the cartridge main body 10, the lid member 20 that covers the front side of the cartridge main body 10, and the films 60 and 80, but the material, the number of components constituting the ink cartridge 1, The shape and the like can be changed as appropriate without departing from the spirit of the present invention.

(7) In each of the above embodiments, the ink cartridge 1 has been described. However, the present invention is applicable to a liquid storage container mounted on a liquid ejecting apparatus, and includes a liquid ejecting head that ejects a minute amount of liquid droplets. The present invention is applicable to various liquid ejecting apparatuses. In addition, a droplet means the state of the liquid discharged from the said liquid ejecting apparatus, and shall also include what pulls a tail in granular shape, tear shape, and thread shape. In addition, the liquid here may be a material that may cause a difference in density in the liquid storage portion like the pigment ink described in the embodiment and can be ejected by the liquid ejecting apparatus. . For example, it may be in the state when the substance is in a liquid phase, and may be in a liquid state with high or low viscosity, sol, gel water, other inorganic solvents, organic solvents, solutions, liquid resins, liquid metals (metal melts) ) And a liquid as one state of the substance, as well as particles in which functional material particles made of solid materials such as pigments and metal particles are dissolved, dispersed or mixed in a solvent. In addition, typical examples of the liquid include ink and liquid crystal as described in the above embodiments. Here, the ink includes general water-based inks and oil-based inks, and various liquid compositions such as gel inks and hot-melt inks. As a specific example of the liquid ejecting apparatus, for example, a liquid containing a material such as an electrode material or a coloring material used for manufacturing a liquid crystal display, an EL (electroluminescence) display, a surface emitting display, a color filter, or the like in a dispersed or dissolved state. It may be a liquid ejecting apparatus for ejecting, a liquid ejecting apparatus for ejecting a bio-organic material used for biochip manufacturing, a liquid ejecting apparatus for ejecting a liquid as a sample used as a precision pipette, a textile printing apparatus, a microdispenser, or the like. In addition, transparent resin liquids such as UV curable resin to form liquid injection devices that pinpoint lubricant oil onto precision machines such as watches and cameras, and micro hemispherical lenses (optical lenses) used in optical communication elements. It may be adopted as a liquid container for a liquid ejecting apparatus that ejects an etching solution such as acid or alkali in order to etch a substrate or the like. The present invention can be applied to a liquid container for any one of these ejection devices.

  As mentioned above, although the various Example of this invention was described, this invention is not limited to these Examples, A various structure can be taken in the range which does not deviate from the meaning.

  DESCRIPTION OF SYMBOLS 10, 10a, 10b ... Cartridge main body, 20 ... Lid member, 50 ... Liquid supply part, 54 ... Sealing film, 60 ... Outer surface film, 80 ... Film, 90 ... Sealing film, 100 ... 1st ink storage chamber, DESCRIPTION OF SYMBOLS 102 ... Air introduction port, 104 ... Ink lead-out port, 110 ... 2nd ink storage chamber, 110a ... Upper surface, 110b ... Bottom surface, 110c ... Right side surface, 110d ... Left side surface, 110e ... Front, 110f ... Back surface, 112 ... Ink introduction Port 114, Ink outlet port 116, 117 Rib, 120 Third ink storage chamber 120a Top surface 120b Bottom surface 120c Right side 120d Left side 122 Ink inlet 124 Ink guide Outlet, 126, 127, 128, 129, 130, 131 ... rib, 140 ... atmosphere introduction part, 142 ... atmosphere opening, 144 ... accommodation chamber communication hole, 1 0, 162, 164, 166 ... groove, 170 ... flow path, 171 ... supply inlet, 200 ... upper flow path, 210 ... lower flow path, 220 ... middle flow path, 250 ... upper flow path, 260 ... lower flow path, 270 ... middle flow path, 400 ... cartridge mounting portion, 416, 417 ... rib, 416a ... first upper flow path, 417a ... second upper flow path

Claims (8)

A liquid storage container mounted on the liquid supply device,
A liquid storage portion for storing a liquid, the upper surface and the bottom surface facing each other in a vertical direction in a state where the liquid storage container is mounted on the liquid supply device, and the liquid storage portion that is provided in the vicinity of the bottom surface to the outside A liquid outlet including a liquid outlet for leading out the liquid;
A pair of ribs provided so as to sandwich the liquid outlet and extending in the vertical direction;
The pair of ribs are provided between the top surface and the bottom surface,
The upper ends in the vertical direction of the pair of ribs are configured not to contact the upper surface,
The pair of ribs is an opening formed such that at least a part of the lower end is not in contact with the bottom surface, or an opening formed by cutting out a part of the rib near the lower end. Configured to have a part,
A horizontal cross-sectional area of the space formed between the pair of ribs in a state where the liquid container is mounted on the liquid supply device is configured to be larger than the area of the opening. ,
Liquid container. The liquid container according to claim 1,
The liquid container is
A first side surface and a second side surface intersecting the top surface and the bottom surface;
A liquid inlet provided in the vicinity of the bottom surface;
Have
The pair of ribs includes a first rib provided on the first side surface side from the liquid outlet port and a second rib provided on the second side surface side from the liquid outlet port. ,
The liquid inlet is provided at a position closer to the first side surface than the first rib of the pair of ribs,
At least one third rib extending in the vertical direction is provided between the first side surface and the first rib,
An upper end of the third rib in the vertical direction is configured not to contact the upper surface,
The third rib is an opening formed by being configured so that at least a part of the lower end does not contact the bottom surface, or formed by cutting out a part of the rib in the vicinity of the lower end. Configured to have an opening,
The first rib and the at least one third rib are provided in order of height from the liquid outlet to the liquid inlet so that the vertical heights thereof are different from each other. ing,
Liquid container. The liquid container according to claim 2,
At least one fourth rib extending in the vertical direction is provided between the second side surface and the second rib,
The upper end of the vertical direction of the fourth rib is configured not to contact the upper surface,
The fourth rib is an opening formed by being configured such that at least a part of the lower end does not contact the bottom surface, or is formed by cutting out a part of the rib in the vicinity of the lower end. Configured to have an opening,
The second rib and the at least one fourth rib are provided in order of increasing height so that the heights in the vertical direction are different from each other and from the liquid outlet to the second side surface. ing,
Liquid container. A liquid container according to claim 2 or claim 3,
The vertical height of the second rib is configured to be lower than the vertical height of the first rib.
Liquid container. The liquid container according to claim 1,
The liquid container is
A first side surface and a second side surface intersecting the top surface and the bottom surface;
A liquid inlet provided in the vicinity of the bottom surface;
Have
Of the pair of ribs, the height in the vertical direction of the second rib provided on the second side surface with respect to the liquid outlet port is provided on the first side surface side with respect to the liquid outlet port. The first rib is configured to be lower than the vertical height,
The liquid introduction port is provided at a position closer to the first side surface than the first rib among the pair of ribs.
Liquid container. The liquid container according to any one of claims 1 to 5,
The liquid outlet is formed at a substantially center in the longitudinal direction of the bottom surface,
Liquid container. The liquid container according to any one of claims 1 to 6,
The opening is constituted by a notch formed in the rib.
Liquid container. A liquid container according to any one of claims 1 to 7,
The liquid is a pigment ink;
Liquid container.

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