Abstract:
Leakage of liquid from a liquid container is reduced. A liquid container capable of containing liquid has: a liquid containing portion capable of containing the liquid; a liquid inlet port receiving injection of the liquid into the liquid containing portion; an atmosphere opening port communicating with the liquid containing portion and introducing atmosphere into the liquid containing portion; an atmosphere communicating portion leading to the liquid containing portion from the atmosphere opening port; a first face oriented outward; and a second face oriented outward in a direction that is different from a direction of the first face. The atmosphere communicating portion includes a plurality of atmosphere chambers, and the plurality of atmosphere chambers include a first atmosphere chamber provided in the first face, and a second atmosphere chamber provided in the second face.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority to Japanese Patent Application No. 2015-149347 filed on Jul. 29, 2015, the entire contents of this application are incorporated by reference herein. 
       BACKGROUND 
       [0002]    1. Technical Field 
         [0003]    The present invention relates to liquid containers, liquid ejection systems, and the like. 
         [0004]    2. Related Art 
         [0005]    Hitherto, inkjet printers are known as exemplary liquid ejection apparatuses. Inkjet printers can print on print mediums by discharging ink, which is exemplary liquid, from an ejection head onto print mediums such as print paper. Regarding such inkjet printers, a configuration in which ink stored in a tank, which is an exemplary liquid container, is supplied to the ejection head has been hitherto known. Regarding such a tank, a configuration in which atmosphere can be introduced into a containing portion, which is capable of containing ink, from an atmosphere communicating port via a communicating portion is known. JP-A-2015-80907 proposes a configuration capable of reducing, in this kind of a tank, leakage of ink in the containing portion to the outside of the tank from the atmosphere communicating port through the communicating portion (e.g., see JP-A-2015-80907). 
         [0006]    The aforementioned JP-A-2015-80907 does not propose any further improvement, i.e., a configuration capable of further reducing the leakage of liquid from the liquid container. 
       SUMMARY 
       [0007]    The invention can solve at least the foregoing problem, and can be achieved as the following modes or application examples. 
       APPLICATION EXAMPLE 1 
       [0008]    A liquid container capable of containing a liquid, including: a liquid containing portion capable of containing the liquid; a liquid inlet port receiving injection of the liquid into the liquid containing portion; an atmosphere opening port communicating with the liquid containing portion and introducing atmosphere into the liquid containing portion; an atmosphere communicating portion leading to the liquid containing portion from the atmosphere opening port; a first face oriented outward; and a second face oriented outward in a direction different from a direction of the first face, wherein the atmosphere communicating portion includes a plurality of atmosphere chambers, and the plurality of atmosphere chambers include: a first atmosphere chamber provided in the first face; and a second atmosphere chamber provided in the second face. 
         [0009]    In this liquid container, the first face and the second face are oriented in different directions, the first atmosphere chamber is provided in the first face, and the second atmosphere chamber is provided in the second face. Therefore, even if the liquid enters the atmosphere communicating portion from the liquid containing portion, the progress of the liquid can be readily prevented between the first atmosphere chamber and the second atmosphere chamber. Thus, leakage of the liquid in the liquid containing portion to the outside of the liquid container from the atmosphere opening port via the atmosphere communicating portion can be readily prevented. 
       APPLICATION EXAMPLE 2 
       [0010]    In the above liquid container, the first face and the second face are oriented in opposite directions. 
         [0011]    In this liquid container, since the first face and the second face are oriented in opposite directions, the progress of the liquid can be readily prevented between the first atmosphere chamber and the second atmosphere chamber. Thus, leakage of the liquid in the liquid containing portion to the outside of the liquid container from the atmosphere opening port via the atmosphere communicating portion can be readily prevented. 
       APPLICATION EXAMPLE 3 
       [0012]    The above liquid container further includes: a third face oriented outward in a direction intersecting the direction of the first face, wherein the plurality of atmosphere chambers include a third atmosphere chamber provided in the third face. 
         [0013]    In this liquid container, since the first face and the third face are oriented in directions that intersect each other, the progress of the liquid can be readily prevented between the first atmosphere chamber and the third atmosphere chamber. Thus, leakage of the liquid in the liquid containing portion to the outside of the liquid container from the atmosphere opening port via the atmosphere communicating portion can be readily prevented. 
       APPLICATION EXAMPLE 4 
       [0014]    In the above liquid container, a waterproof air-permeable member is arranged in an atmosphere chamber that is closest to the atmosphere opening port in a flow path of the atmosphere communicating portion among the plurality of atmosphere chambers. 
         [0015]    In this liquid container, since the progress of the liquid can be prevented by the waterproof air-permeable member, the liquid that has entered the atmosphere communicating portion from the liquid containing portion reaching the atmosphere opening port can be readily suppressed. 
       APPLICATION EXAMPLE 5 
       [0016]    In the above liquid container, in a posture of the liquid container when in use, a connection port between the atmosphere communicating portion and the liquid containing portion is located at the same position in a vertical direction as the liquid inlet port, or is located above the liquid inlet port. 
         [0017]    In this liquid container, the communicating port between the atmosphere communicating portion and the liquid containing portion is located at the same position in the vertical direction as the liquid inlet port, or is located above the liquid inlet port. Therefore, the liquid in the liquid containing portion does not easily reach the connection port. 
       APPLICATION EXAMPLE 6 
       [0018]    In the above liquid container, in a posture of the liquid container when in use, a connection port between the atmosphere communicating portion and the liquid containing portion is located below the liquid inlet port. 
         [0019]    With this liquid container, in the configuration in which the connection port between the atmosphere communicating portion and the liquid containing portion is located below the liquid inlet port, leakage of the liquid in the liquid containing portion to the outside of the liquid container from the atmosphere opening port via the atmosphere communicating portion can be readily prevented. 
       APPLICATION EXAMPLE 7 
       [0020]    In the above liquid container, the liquid is ink that contains a sublimating color material. 
       APPLICATION EXAMPLE 8 
       [0021]    A liquid ejection system includes: the above-described liquid container; a liquid ejection head to which the liquid is supplied from the liquid container; and an exterior portion that houses the liquid container and the liquid ejection head, wherein the liquid container includes a visual check portion that check a position of a liquid surface of the liquid contained in the liquid containing portion visually. 
       APPLICATION EXAMPLE 9 
       [0022]    In the above liquid ejection system, the visual check portion is provided with an upper limit index portion indicating a guide of an upper limit of an amount of liquid in the liquid containing portion. 
       APPLICATION EXAMPLE 10 
       [0023]    In the above liquid ejection system, the exterior portion is provided with a window portion through which the visual check portion can be visually checked. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0024]    The invention will be described with reference to the accompanying drawings, wherein like numbers reference like elements. 
           [0025]      FIG. 1  is a perspective view illustrating a main configuration of a liquid ejection system according to embodiments. 
           [0026]      FIG. 2  is a perspective view illustrating a main configuration of the liquid ejection system according to embodiments. 
           [0027]      FIG. 3  is an exploded perspective view illustrating a main configuration of an ink supply apparatus according to embodiments. 
           [0028]      FIG. 4  is a perspective view illustrating a main configuration of the ink supply apparatus according to embodiments. 
           [0029]      FIG. 5  is a perspective view illustrating a tank according to Embodiment 1. 
           [0030]      FIG. 6  is a perspective view illustrating the tank according to Embodiment 1. 
           [0031]      FIG. 7  is an exploded perspective view illustrating the tank according to Embodiment 1. 
           [0032]      FIG. 8  is an exploded perspective view illustrating the tank according to Embodiment 1. 
           [0033]      FIG. 9  is a perspective view illustrating a case according to Embodiment 1. 
           [0034]      FIG. 10  is an exploded perspective view illustrating the tank according to Embodiment 1. 
           [0035]      FIG. 11  is a diagram of the case according to Embodiment 1 as viewed from the back face side of the tank. 
           [0036]      FIG. 12  is a diagram of the case according to Embodiment 1 as viewed from the front face side of the tank. 
           [0037]      FIG. 13  is a cross-sectional view illustrating the tank according to Embodiment 1. 
           [0038]      FIG. 14  is a diagram of the tank according to Embodiment 1 as viewed from the back face side. 
           [0039]      FIG. 15  is a diagram of the tank according to Embodiment 1 as viewed from the front face side. 
           [0040]      FIG. 16  is a diagram schematically illustrating a flow path of the tank according to Embodiment 1. 
           [0041]      FIG. 17  is an exploded perspective view illustrating a tank according to Embodiment 2. 
           [0042]      FIG. 18  is a diagram of the tank according to Embodiment 2 as viewed from the front face side. 
           [0043]      FIG. 19  is a diagram schematically illustrating a flow path of the tank according to Embodiment 2. 
           [0044]      FIG. 20  is a perspective view illustrating a tank according to Embodiment 3. 
           [0045]      FIG. 21  is a perspective view illustrating the tank according to Embodiment 3. 
           [0046]      FIG. 22  is a perspective view illustrating the tank according to Embodiment 3. 
           [0047]      FIG. 23  is an exploded perspective view illustrating the tank according to Embodiment 3. 
           [0048]      FIG. 24  is a perspective view illustrating the case according to Embodiment 3. 
           [0049]      FIG. 25  is a perspective view illustrating the case according to Embodiment 3. 
           [0050]      FIG. 26  is an enlarged view of an area A in  FIG. 25 . 
           [0051]      FIG. 27  is a diagram of the case according to Embodiment 3 as viewed from the back face side of the tank. 
           [0052]      FIG. 28  is a diagram of the case according to Embodiment 3 as viewed from the front face side of the tank. 
           [0053]      FIG. 29  is a diagram of the case according to Embodiment 3 as viewed from the upper face side of the tank. 
           [0054]      FIG. 30  is a diagram schematically illustrating a flow path of the tank according to Embodiment 3. 
           [0055]      FIG. 31  is a cross-sectional view schematically illustrating the tank according to Embodiment 3 in a usage posture. 
       
    
    
     DESCRIPTION OF EXEMPLARY EMBODIMENTS 
       [0056]    Embodiments will be described with reference to the drawings, taking a liquid ejection system that includes an inkjet printer (hereinafter referred to as a printer), which is an exemplary liquid ejection apparatus, as an example. Note that the scale of components and members may be different in the drawings so that each component has a recognizable size. 
         [0057]    As illustrated in  FIG. 1 , a liquid ejection system  1  according to the embodiments has a printer  3 , which is an exemplary liquid ejection apparatus, an ink supply apparatus  4 , which is an exemplary liquid supply apparatus, and a scanner unit  5 . The printer  3  has a housing  6 . The housing  6  includes an outer shell of the printer  3 . The ink supply apparatus  4  has a housing  7 , which is an exemplary liquid container attaching portion, and a plurality of (two or more) tanks  9 . The housing  6 , the housing  7 , and the scanner unit  5  include an outer shell of the liquid ejection system  1 . Note that a configuration in which the scanner unit  5  is omitted may also be employed as the liquid ejection system  1 . The tanks  9  are exemplary liquid containers. The liquid ejection system  1  can print on a recording medium P, such as recording paper, using ink, which is exemplary liquid. 
         [0058]    Here, in  FIG. 1 , X, Y, and Z axes, which are mutually orthogonal coordinate axes, are provided. The X, Y, and Z axes are also illustrated as necessary in the subsequent diagrams. In the embodiments, a state where the liquid ejection system  1  is arranged in a horizontal plane defined by the X axis and the Y axis (XY plane) corresponds to a usage state of the liquid ejection system  1 . The posture of the liquid ejection system  1  when the liquid ejection system  1  is arranged in an XY plane will be referred to as a usage posture of the liquid ejection system  1 . The Z axis is an axis orthogonal to the horizontal plane. In the usage state of the liquid ejection system  1 , a Z-axis direction is a vertically upward direction. Also, in the usage state of the liquid ejection system  1 , a -Z-axis direction is a vertically downward direction in  FIG. 1 . Note that, of each of the X, Y, and Z axes, the direction of the arrow indicates a plus (positive) direction, and the direction opposite to the direction of the arrow indicates a minus (negative) direction. 
         [0059]    In the liquid ejection system  1 , the printer  3  and the scanner unit  5  are stacked. In a state of the printer  3  when in use, the scanner unit  5  is located vertically above the printer  3 . The scanner unit  5  is of a flat-bed type, and has an image sensor (not illustrated). The scanner unit  5  can read out, as image data, images or the like recorded on a medium such as paper, via the imaging sensor. For this reason, the scanner unit  5  functions as a device for reading out images or the like. The scanner unit  5  is configured to be able to pivot relative to the printer  3 . The scanner unit  5  also has a function of a lid of the printer  3 . An operator can pivot the scanner unit  5  relative to the printer  3  by lifting up the scanner unit  5  in the Z-axis direction. Thus, the scanner unit  5 , which functions as a lid of the printer  3 , can be opened relative to the printer  3 . 
         [0060]    The printer  3  is provided with a paper discharge portion  11 . In the printer  3 , a recording medium P is discharged from the paper discharge portion  11 . A face of the printer  3  in which the paper discharge portion  11  is provided is a front face  13 . The liquid ejection system  1  also has an upper face  15  that intersects the front face  13 , and a side portion  19  that intersects the front face  13  and the upper face  15 . The ink supply apparatus  4  is provided in the side portion  19 . The housing  7  is provided with window portions  21 . In the housing  7 , the window portions  21  are provided in a side portion  27  that intersects a front face  23  and an upper face  25 . 
         [0061]    The window portions  21  are optically translucent. The aforementioned four tanks  9  are provided in positions that overlap the window portions  21 . Therefore, the operator who uses the liquid ejection system  1  can visually check the four tanks  9  via the window portions  21 . In the embodiments, the window portions  21  are provided as openings formed in the housing  7 . The operator can visually check the four tanks  9  via the windows  21  that are openings. Note that the window portions  21  are not limited to openings, and may be included by optically translucent members, for example. 
         [0062]    In the embodiments, at least a part of a portion of each tank  9  that faces the corresponding window portion  21  is optically translucent. Ink in the tanks  9  can be visually checked from the optically translucent portions of the tanks  9 . Accordingly, the operator can visually check the amount of ink in the tanks  9  by visually checking the four tanks  9  via the window portions  21 . That is to say, at least a part of a portion of each tank  9  that faces the corresponding window portion  21  can be used as a visual check portion through which the amount of ink can be visually checked. 
         [0063]    As illustrated in  FIG. 2 , the printer  3  has a recording portion  31 . In the printer  3 , the recording portion  31  is housed in the housing  6 . The recording portion  31  performs recording using ink, which is exemplary liquid, on a recording medium P that is conveyed in the Y-axis direction by a conveyance device (not illustrated). Note that the conveyance device (not illustrated) intermittently conveys recording mediums P, such as recording paper, in the Y-axis direction. The recording portion  31  is configured to be able to be moved back and forth along the X axis by a moving device (not illustrated). The ink supply apparatus  4  supplies ink to the recording portion  31 . Note that, in the liquid ejection system  1 , at least a part of the ink supply apparatus  4  is located outside of the housing  6 . Note that the recording portion  31  is housed in the housing  6 . Thus, the recording portion  31  can be protected by the housing  6 . 
         [0064]    Here, a direction extending along the X axis is not limited to a direction that is completely parallel with the X axis, and includes a direction that tilts due to an error, a tolerance, or the like, excluding a direction perpendicular to the X axis. Similarly, a direction extending along the Y axis is not limited to a direction that is completely parallel with the Y axis, and includes a direction that tilts due to an error, a tolerance, or the like, excluding a direction perpendicular to the Y axis. A direction extending along the Z axis is not limited to a direction that is completely parallel with the Z axis, and includes a direction that tilts due to an error, a tolerance, or the like, excluding a direction perpendicular to the Z axis. That is to say, a direction extending along any axis or plane is not limited to a direction that is completely parallel with such an axis or plane, and includes a direction that tilts due to an error, a tolerance, or the like, excluding a direction perpendicular to such an axis or plane. 
         [0065]    The ink supply apparatus  4  has tanks  9 , which are exemplary liquid containers. In this embodiment, the ink supply apparatus  4  has a plurality of (in this embodiment, four) tanks  9 . The plurality of tanks  9  are located outside of the housing  6  of the printer  3 . The plurality of tanks  9  are housed in the housing  7 . Thus, the tanks  9  can be protected by the housing  7 . The housing  7  is located outside of the housing  6 . 
         [0066]    Note that, in this embodiment, the ink supply apparatus  4  has a plurality of (four) tanks  9 . However, the number of tanks  9  is not limited to four, and may be three, less than three, or more than four. 
         [0067]    Furthermore, in this embodiment, a plurality of tanks  9  are included by separate bodies. However, the configuration of the tanks  9 , which are exemplary liquid containers, are not limited thereto. The liquid containers may include a configuration in which the plurality of tanks  9  are integrated into a single liquid container. In this case, a plurality of liquid containing portions are provided in the single liquid container. The plurality of liquid containing portions are configured to be separated from one another and to be able to contain different kinds of liquid. In this case, for example, ink of different colors can be individually contained in the plurality of liquid containing portions. 
         [0068]    As illustrated in  FIG. 2 , ink supply tubes  32  are connected to respective tanks  9 . The ink in the tanks  9  is supplied from the ink supply apparatus  4  to the recording portion  31  via the ink supply tubes  32 . The recording portion  31  is provided with a recording head (not illustrated), which is an exemplary liquid ejection head. Nozzle openings (not illustrated), which are oriented to the recording medium P side, are formed in the recording head. The ink supplied from the ink supply apparatus  4  to the recording portion  31  via the ink supply tubes  32  is supplied to the recording head. Then, the ink supplied to the recording portion  31  is discharged as ink droplets to the recording medium P from the nozzle openings of the recording head. Note that although the printer  3  and the ink supply apparatus  4  are separate components in the above-described example, the ink supply apparatus  4  may be included in the configuration of the printer  3 . 
         [0069]    Note that each tank  9  may also employ a configuration in which an upper limit mark  34 , a lower limit mark  35 , and the like are added to a visual check face  33 , through which the amount of contained ink can be visually checked. The visual check face  33  is an exemplary visual check portion. The upper limit mark  34  is an exemplary upper limit index portion. The operator can find the amount of ink in each tank  9  using the upper limit mark  34  and the lower limit mark  35  as guides. Note that the upper limit mark  34  serves as a guide of the amount of ink that does not cause the ink to overflow from a later-described liquid inlet portion  36  when the ink is injected from the liquid inlet portion  36 . The lower limit mark  35  serves as a guide of the amount of ink when prompting the operator to inject ink. A configuration in which at least one of the upper limit mark  34  and the lower limit mark  35  is provided in each tank  9  may also be employed. 
         [0070]    The housing  7  and the housing  6  may be separate bodies, or may be an integrated body. If the housing  7  and the housing  6  are an integrated body, it can be said that the plurality of tanks  9  are housed together with the recording portion  31  and the ink supply tubes  32  within the housing  6 . If the housing  7  and the housing  6  are an integrated body, the housing  6  corresponds to an exterior portion that houses the liquid container and the liquid ejection head. 
         [0071]    A location where the tanks  9  are arranged is not limited to the side face side of the housing  6  in the X-axis direction. For example, the location where the tanks  9  are arranged may also be the front face side of the housing  6  in the Y-axis direction. 
         [0072]    In this embodiment, the plurality of tanks  9  are included by separate bodies. However, the configuration of the tanks  9  is not limited thereto. The tanks  9  may also include a configuration in which the plurality of tanks  9  are an integrated body. In this case, a plurality of ink chambers are provided in a single tank  9 . The plurality of ink chambers are configured to be separated from one another and to be able to contain different kinds of ink. In this case, for example, ink of different colors can be separately contained in the plurality of ink chambers. 
         [0073]    In the liquid ejection system  1  having the above-described configuration, recording is performed on a recording medium P by conveying the recording medium P in the Y-axis direction and causing the recording head of the recording portion  31  to discharge ink droplets in a predetermined position while moving the recording portion  31  back and forth along the X axis. 
         [0074]    The ink is not limited to either one of water-based ink and oil-based ink. Water-based ink may include either a configuration in which a solute such as a dye is dissolved in an aqueous solvent, or a configuration in which dispersoid such as pigment is dispersed in an aqueous dispersion medium. Oil-based ink may include either a configuration in which a solute such as a dye is dissolved in an oil-based solvent, or a configuration in which dispersoid such as pigment is dispersed in an oil-based dispersion medium. 
         [0075]    In the ink supply apparatus  4 , the housing  7  includes a first housing  41  and a second housing  42 , as illustrated in  FIG. 3 . A liquid inlet portion  36  is formed in each tank  9 . With each tank  9 , ink can be injected into the tank  9  from the outside thereof via the corresponding liquid inlet portion  36 . Note that the operator can access the liquid inlet portion  36  of each tank  9  from the outside of the housing  7 . 
         [0076]    Here, the X axis, the Y axis, and the Z axis in  FIG. 3  correspond respectively to the X axis, the Y axis, and the Z axis indicated for the liquid ejection system  1  illustrated in  FIG. 1 . That is to say, the X axis, the Y axis, and the Z axis in  FIG. 3  mean the X axis, the Y axis, and the Z axis in a state where the ink supply apparatus  4  is incorporated in the liquid ejection system  1 . In the case where the X axis, the Y axis, and the Z axis are indicated in the later drawings illustrating constituent components and units of the liquid ejection system  1  as well, these axes mean the X axis, the Y axis, and the Z axis in a state where these constituent components and units are incorporated (installed) in the liquid ejection system  1 . A posture of the constituent components and the units in the usage posture of the liquid ejection system  1  will be referred to as a usage posture of these constituent components and the units. As illustrated in  FIG. 3 , the first housing  41  is located further in the -Z-axis direction than the plurality of tanks  9 . The plurality of tanks  9  are supported by the first housing  41 . The second housing  42  is located further in the Z-axis direction than the first housing  41 , and covers the plurality of tanks  9  from the Z-axis direction relative to the first housing  41 . The plurality of tanks  9  are covered by the first housing  41  and the second housing  42 . 
         [0077]    In this embodiment, the four tanks  9  are arranged in the Y axis. In the following description, when individually identifying the four tanks  9 , the four tanks  9  are denoted respectively as a tank  91 , a tank  92 , a tank  93 , and a tank  94 . The tank  91 , the tank  92 , the tank  93 , and the tank  94  are arranged in this order in the Y-axis direction. That is to say, the tank  92  is located further in the Y-axis direction than the tank  91 , the tank  93  is located further in the Y-axis direction than the tank  92 , and the tank  94  is located further in the Y-axis direction than the tank  93 . 
         [0078]    Of the four tanks  9 , the tank  91 , the tank  92 , and the tank  93  include the same shape. The tank  94  has a shape different from the shape of the other tanks  9 . The volume of the tank  94  is larger than the volume of each of the other tanks  9 . Except this point, the tank  94  has a configuration similar to the other tanks  9 . This configuration is favorable for containing ink of a frequently used type in the tank  94 , for example. This is because a larger amount of the ink of a frequently used type can be contained than the other types of ink. 
         [0079]    The second housing  42  has a cover  43 . The cover  43  is located at an end of the second housing  42  in the Z-axis direction. As illustrated in FIG.  4 , the cover  43  is configured to be able to pivot relative to the second housing  42 .  FIG. 4  illustrated a state where the cover  43  is open relative to the second housing  42 . Upon the cover  43  being opened relative to the second housing  42 , the liquid inlet portions  36  of the plurality of tanks  9  are exposed. Thus, the operator can access the liquid inlet portions  36  of the tanks  9  from the outside of the housing  7 . 
         [0080]    A locking portion  43 A is provided in the cover  43 . As illustrated in  FIG. 4 , the locking portion  43 A is provided on the first housing  41  side of the cover  43 . In a state where the cover  43  is closed, the locking portion  43 A projects from the cover  43  toward the first housing  41  side. A protruding portion  43 B is formed in the locking portion  43 A. The protruding portion  43 B is formed on the side opposite to the cover  43  side of the locking portion  43 A. The protruding portion  43 B projects in the -Y-axis direction from the locking portion  43 A. In the second housing  42 , a locking hole  42 A is formed in a portion opposing the locking portion  43 A. In the second housing  42 , the locking hole  42 A is formed in a portion that overlaps the locking portion  43 A when the cover  43  is closed. 
         [0081]    In a state where the cover  43  is closed, the locking portion  43 A is inserted into the locking hole  42 A of the second housing  42 . At this time, the protruding portion  43 B of the locking portion  43 A engages with the locking hole  42 A. Thus, a clicking sensation is obtained when the cover  43  is closed and the protruding portion  43 B of the locking portion  43 A engages with the locking hole  511 . Also, for example, when the cover  43  is closed with strong force, the force of the cover  43  can be softened by the protruding portion  43 B engaging with the locking hole  42 A. Thus, it is possible to reduce impact occurring when the cover  43  abuts against the second housing  42  when the cover  43  is closed. 
         [0082]    As illustrated in  FIG. 4 , a holding portion  43 C is formed in the cover  43 . The holding portion  43 C is provided at an end of the cover  43  in the X-axis direction, which is also an end in the -Z-axis direction. The operator can pivot the cover  43  in the Z-axis direction by holding the holding portion  43 C with fingers. At this time, since the holding portion  43 C can be readily held with fingers, the operator can readily pivot the cover  43  by holding the holding portion  43 C with fingers. 
         [0083]    Note that the liquid inlet portions  36  are sealed by plug members  44 . When injecting ink into each tank  9 , the plug member  44  is removed from the liquid inlet portion  36  to open the liquid inlet portion  36 , and then the ink is injected therein. 
         [0084]    The second housing  42  further has a plurality of plug member arrangement portions  45  and a plurality of attaching portions  46 . The plurality of plug member arrangement portions  45  and the plurality of attaching portions  46  are arranged on a surface of the second housing  42  in the Z-axis direction. In the second housing  42 , the plurality of plug member arrangement portions  45  and the plurality of attaching portions  46  are provided on a surface opposing the cover  43 . Therefore, when closing the cover  43 , the plurality of plug member arrangement portions  45  and the plurality of attaching portions  46  are covered by the cover  43 . The plurality of plug member arrangement portions  45  are arranged next to one another along the Y axis. The plurality of attaching portions  46  are arranged next to one another along the Y axis. 
         [0085]    The plurality of plug member arrangement portions  45  are configured to enable plug bodies  44 A of the corresponding plug members  44  to be arranged therein. That is to say, the plug member arrangement portions  45  are portions in which the plug bodies  44 A of the corresponding plug members  44  removed from the liquid injecting ports  52  are to be arranged. 
         [0086]    The plug member arrangement portions  45  are recessed portions formed in a surface of the second housing  42  in the Z-axis direction. The plug bodies  44 A of the plug members  44  are received by these recessed portions. The plug member arrangement portions  45  can hold ink with the recessed portions. The plug member arrangement portions  45  each include a projection  45 A. The projection  45 A projects in the vertically upward direction from a surface of the second housing  42  in the Z-axis direction. The projection  45 A is a portion with which the corresponding plug body  44 A of the plug member  44  is attached (held) as a result of the plug body  44 A being inserted therein. It is favorable that the plug member arrangement portions  45  are configured to be able to hold ink. For example, as in this embodiment, the plug member arrangement portions  45  may be recessed portions, or may be porous members arranged in a surface of the second housing  42  in the Z-axis direction. 
         [0087]    The plurality of attaching portions  46  are portions to which attached portions  44 B of the corresponding plug members  44  can be attached. The plurality of attaching portions  46  are each a column-shaped projection that projects in the Z-axis direction from the surface of the second housing  42  in the Z-axis direction. In each plug member  44 , the plug body  44 A and the attached portion  44 B are connected to each other via a connection portion  44 C. Therefore, the plug bodies  44 A can be readily prevented from falling down or being lost when removing the plug bodies  44 A from the liquid inlet portions  36 . 
         [0088]    Various embodiments of the tanks  9  and the ink supply apparatus  4  will now be described. Note that, in the following description, the tanks  9  and the ink supply apparatus  4  will be identified for each embodiment, and therefore, the signs of the tanks  9  and the ink supply apparatus  4  will be followed by different alphabet characters in each embodiment. As mentioned above, regarding the four tanks  9 , the tank  94  and the other tanks  9  include similar configurations except that the volume is different. Embodiments of the tanks  9  will be described below, taking the tank  91  as an example. Various embodiments of the tanks  9  in the following description are also applicable to the tank  94 . Therefore, detailed descriptions of the embodiments of the tank  94  will be omitted. 
       Embodiment 1 
       [0089]    A tank  9 A in Embodiment 1 will be described. As illustrated in  FIG. 5 , the tank  9 A has a front face  51 , a side face  52 , and an upper face  53 . The front face  51 , the side face  52 , and the upper face  53  are faces oriented outward of the tank  9 A. As illustrated in  FIG. 6 , the tank  9 A has a back face  54 , a side face  55 , and a lower face  56 . The back face  54 , the side face  55 , and the lower face  56  are faces oriented outward of the tank  9 A. 
         [0090]    As illustrated in  FIG. 5 , among the faces oriented outward of the tank  9 A, the front face  51  is oriented in the Y-axis direction. In this embodiment, the front face  51  extends along an XZ plane. The side face  52  is oriented in the -X-axis direction. In this embodiment, the side face  52  extends along a YZ plane. The side face  52  intersects the front face  51 . The upper face  53  is oriented in the Z-axis direction. In this embodiment, the upper face  53  has steps. In this embodiment, among the faces of the tank  9 A that are oriented in the Z-axis direction, the face that intersects the front face  51  is the upper face  53 . The upper face  53  extends along an XY plane. Note that a part of the upper face  53  also intersects the side face  52 . 
         [0091]    Note that the face extending along an XZ plane is not limited to a face extending completely parallel with an XZ plane, and also includes a face that tilts due to an error, a tolerance, or the like, excluding faces perpendicular to the XZ plane. Similarly, the face extending along a YZ plane is not limited to a face extending completely parallel with a YZ plane, and also includes a face that tilts due to an error, a tolerance, or the like, excluding faces perpendicular to the YZ plane. The face extending along an XY plane is not limited to a face extending completely parallel with an XY plane, and also includes a face that tilts due to an error, a tolerance, or the like, excluding faces perpendicular to the XY plane. The front face  51 , the side face  52 , the upper face  53 , the back face  54 , the side face  55 , and the lower face  56  are not limited to flat faces, and may include recesses and projections, steps, or the like. 
         [0092]    “Two faces intersecting each other” indicates that the two faces are in a positional relationship in which these faces are not parallel with each other. In addition to the case where two faces are in direct contact with each other, the case of a relationship in which extension of one face intersects extension of the other face in a positional relationship in which two faces are not in direct contact with each other and are separate from each other, is also considered to be “two faces intersecting each other”. An angle formed by two intersecting faces may be a right angle, an obtuse angle, or an acute angle. 
         [0093]    The upper face  53  has steps at two locations. The steps in the upper face  53  each refer to a height difference along the Z axis in the upper face  53 . In the following description, when identifying, by each step, the upper face  53  including the steps at the two locations, the upper face  53  will be denoted as an upper face  53 A, an upper face  53 B, and an upper face  53 C. The upper face  53 A is located between the two steps, and is located further in the Z-axis direction than the upper face  53 B and the upper  53 C. When the tank  9 A is viewed in a plan view in the -Z-axis direction, the upper face  53 A is located between the upper face  53 B and the upper face  53 C. 
         [0094]    The upper face  53 B is located in the -X-axis direction relative to the upper face  53 A. The upper face  53 B is located further in the -X-axis direction than the upper face  53 A and the upper face  53 C. In other words, the upper face  53 B is located further on the side face  52  side than the upper face  53 A and the upper face  53 C. The upper face  53 C is located in the X-axis direction relative to the upper face  53 A. The upper face  53 C is located further in the X-axis direction than the upper face  53 A and the upper face  53 B. In other words, the upper face  53 C is located further on the side face  55  ( FIG. 6 ) side than the upper face  53 A and the upper face  53 B. 
         [0095]    In the tank  9 A, the liquid inlet portion  36  is provided in the upper face  53 C. The liquid inlet portion  36  projects in the Z-axis direction from the upper face  53 C. The tank  9 A is also provided with an atmosphere opening portion  58  and a liquid supply portion  59 . The atmosphere opening portion  58  is provided in a step face  61 . The atmosphere opening portion  58  projects in the -X-axis direction from the step face  61 . The step face  61  is a face that serves as a step for connecting the upper face  53 A to the upper face  53 B, and is oriented in the -X-axis direction. In this embodiment, the step face  61  extends along a YZ plane. The step face  61  intersects the upper face  53 A, the upper face  53 B, the front face  51 , and the back face  54  ( FIG. 6 ). 
         [0096]    The liquid supply portion  59  is provided in a portion  62  that projects in the -X-axis direction from the side face  52 . The liquid supply portion  59  projects in the Y-axis direction from the portion  62  that projects from the side face  52 . Ink contained in the tank  9 A is supplied to the ink supply tube  32  ( FIG. 2 ) via the liquid supply portion  59 . 
         [0097]    As illustrated in  FIG. 6 , among the faces oriented outward of the tank  9 A, the back face  54  is oriented in the -Y-axis direction . In this embodiment, the back face  54  extends along an XZ plane. The side face  55  is oriented in the X-axis direction. In this embodiment, the side face  55  extends along a YZ plane. The side face  55  intersects the front face  54 . Note that, in the tank  9 A, the side face  55  is set as the visual check face  33 . The lower face  56  is oriented in the -Z-axis direction. In this embodiment, the lower face  56  inclines relative to an XY plane. In this embodiment, the lower face  56  inclines in a direction toward the Z-axis direction while extending in the X-axis direction. The lower face  56  intersects the back face  54 . 
         [0098]    In the tank  9 A, the front face  51  ( FIG. 5 ) and the back face  54  ( FIG. 6 ) are oriented in opposite directions. The side face  52  also intersects the back face  54 . The side face  55  also intersects the front face  51 . The upper face  53  also intersects the back face  54 . The lower face  56  also intersects the front face  51 . Note that, in the tank  9 A, the back face  54  is an exemplary first face, and the front face  51  is an exemplary second face. In the tank  9 A, the front face  51  and the back face  54  are oriented outward of the tank  9 A in different directions. 
         [0099]    As illustrated in  FIG. 7 , the tank  9 A has a case  63 , which is an exemplary tank body, a sheet member  64 , a waterproof air-permeable film  65 , and a sheet member  66 . The case  63  is made of synthetic resin such as nylon or polypropylene, for example. The sheet member  64  and the sheet member  66  are made of synthetic resin (e.g., nylon, polypropylene etc.) formed in a film shape, and are flexible. The waterproof air-permeable film  65  has a high waterproof property with respect to liquid, i.e., is made of a material having low liquid permeability and high air permeability, and is formed in a film shape. The waterproof air-permeable film  65  is an exemplary waterproof air-permeable member. Note that, in this embodiment, a face of the sheet member  66  that is oriented in the Y-axis direction corresponds to the front face  51  of the tank  9 A. 
         [0100]    As illustrated in  FIG. 8 , a recessed portion  67  is formed in the case  63 . The case  63  is provided with a joint portion  68 . In  FIG. 8 , the joint portion  68  is hatched for the purpose of clearly illustrating the configuration of the joint portion  68 . The sheet member  64  is joined to the joint portion  68 . In this embodiment, the case  63  and the sheet member  64  are joined to each other by adhesion. Upon the case  63  being joined to the sheet member  64 , the recessed portion  67  is blocked by the sheet member  64 . The space surrounded by the recessed portion  67  and the sheet member  64  is called a liquid containing portion  69 . Ink is contained in the liquid containing portion  69 . Note that, in this embodiment, a face of the sheet member  64  that is oriented in the -Y-axis direction corresponds to the back face  54  of the tank  9 A. Therefore, in the tank  9 A, the back face  54  is provided with the liquid containing portion  69 . 
         [0101]    The case  63  has a wall  71 , a wall  72 , a wall  73 , a wall  74 , a wall  75 , a wall  76 , a wall  77 , a wall  78 , and a wall  79 . The wall  71  extends along an XZ plane. Eight walls, namely the walls  72  to  79  intersect the wall  71 . Eight walls, namely the walls  72  to  79  project in the -Y-axis direction from the wall  71 . When the wall  71  is viewed in a plan view in the Y-axis direction, eight walls, namely the walls  72  to  79  surround the wall  71 . The wall  71  and the eight walls that are the walls  72  to  79  constitute the recessed portion  67  that has the wall  71  as a bottom. Note that the walls  71  to  79  are not limited to flat walls, and may include recesses and projections, steps, or the like. 
         [0102]    The wall  72  and the wall  73  are provided in positions that oppose each other with a gap therebetween along the X axis, and extend along a YZ plane. The wall  73  is located further in the X-axis direction than the wall  72 . The wall  74  is located in the -Z-axis direction relative to the wall  72  and the wall  73 , and intersects the walls  72  and  73 . When the wall  71  is viewed in a plan view in the Y-axis direction, the walls  75  to  79  are located further in the Z-axis direction than the wall  74 . The wall  75  is located in the X-axis direction than the walls  76  to  79 , and intersects the wall  73 . The wall  79  is located in the X-axis direction than the walls  75  to  78 , and intersects the wall  72 . The wall  76  is located in the -X-axis direction relative to the wall  75 , and extends along a YZ plane. The wall  77  is located in the -X-axis direction relative to the wall  76 , and extends along an XY plane. The wall  78  is located in the -X-axis direction relative to the wall  77 , and extends along a YZ plane. The wall  79  is located in the -X-axis direction relative to the wall  78 , and extends along an XY plane. 
         [0103]    As illustrated in  FIG. 9 , in the case  63 , a recessed portion  81 , a recessed portion  82 , a recessed portion  83 , a recessed portion  84 , a recessed portion  85 , a recessed portion  86 , a groove portion  87 , and a groove portion  88  are formed. The recessed portion  81  is located in the Z-axis direction relative to the recessed portion  67 . The recessed portion  81  is located in the Z-axis direction relative to the wall  75 . The recessed portion  81  is partitioned by the wall  73 , the wall  75 , the wall  76 , the wall  101 , and the wall  102 . The wall  101  extends along an XZ plane, and is located further in the -Y-axis direction than the wall  71 . The wall  102  extends along an XY plane, and is located further in the Z-axis direction than the wall  75 . The wall  73 , the wall  75 , the wall  76 , and the wall  102  project in the -Y-axis direction from the wall  101 . When the wall  101  is viewed in a plan view in the Y-axis direction, the wall  73 , the wall  75 , the wall  76 , and the wall  102  surround the wall  101 . Thus, the recessed portion  81  that has the wall  101  as a bottom is configured. 
         [0104]    The recessed portion  82  is located in the Z-axis direction relative to the recessed portion  67 . The recessed portion  82  is located in the Z-axis direction relative to the wall  77 . The recessed portion  82  is partitioned by the wall  71 , the wall  77 , the wall  103 , the wall  104 , and the wall  105 . Note that the wall  71  of the recessed portion  67  and the wall  71  of the recessed portion  82  are the same wall. That is to say, in this embodiment, the recessed portion  67  and the recessed portion  82  share the wall  71 . The recessed portion  67  and the recessed portion  82  also share the wall  76  and the wall  77 . The wall  103  extends along a YZ plane, and is located further in the -X-axis direction than the wall  76 . The wall  104  extends along an XY plane, and is located further in the Z-axis direction than the wall  77 . The wall  105  extends along a YZ plane, and is located further in the -X-axis direction than the wall  76  and further in the X-axis direction than the wall  103 . The wall  77 , the wall  103 , the wall  104 , and the wall  105  project in the -Y-axis direction from the wall  71 . When the wall  71  is viewed in a plan view in the Y-axis direction, the wall  77 , the wall  103 , the wall  104 , and the wall  105  surround a part of the wall  71 . Thus, the recessed portion  82  that has the wall  71  as a bottom is configured. 
         [0105]    The recessed portion  82  is located in the Z-axis direction relative to the recessed portion  67 , and is located in the -X-axis direction relative to the recessed portion  82 . The recessed portion  83  is located in the Z-axis direction relative to the wall  77 . The recessed portion  83  is partitioned by the wall  71 , the wall  77 , the wall  103 , the wall  104 , and the wall  106 . Note that the recessed portion  67  and the recessed portion  83  also share the wall  71  and the wall  77 . The recessed portion  82  and the recessed portion  83  share the wall  103  and the wall  104 . The wall  106  extends along a YZ plane, and is located further in the -X-axis direction than the wall  103 . The wall  77 , the wall  103 , the wall  104 , and the wall  106  project in the -Y-axis direction from the wall  71 . When the wall  71  is viewed in a plan view in the Y-axis direction, the wall  77 , the wall  103 , the wall  104 , and the wall  106  surround a part of the wall  71 . Thus, the recessed portion  83  that has the wall  71  as a bottom is configured. 
         [0106]    The recessed portion  84  is located in the Z-axis direction relative to the recessed portion  67 , and is located in the -X-axis direction relative to the recessed portion  83 . The recessed portion  84  is located in the Z-axis direction relative to the wall  77 . The recessed portion  84  is partitioned by the wall  71 , the wall  77 , the wall  78 , the wall  106 , and the wall  107 . Note that the recessed portion  67  and the recessed portion  84  share the wall  71 , the wall  77 , and the wall  78 . The recessed portion  83  and the recessed portion  84  share the wall  106 . The wall  107  extends along an XY plane, and is located further in the Z-axis direction than the wall  77 . The wall  77 , the wall  78 , the wall  106 , and the wall  107  project in the -Y-axis direction from the wall  71 . When the wall  71  is viewed in a plan view in the Y-axis direction, the wall  77 , the wall  78 , the wall  106 , and the wall  107  surround a part of the wall  71 . Thus, the recessed portion  84  that has the wall  71  as a bottom is configured. 
         [0107]    The recessed portion  85  is located in the Z-axis direction relative to the recessed portion  82 . The recessed portion  85  is located in the Z-axis direction relative to the wall  104 . The recessed portion  85  is partitioned by the wall  71 , the wall  104 , the wall  105 , the wall  106 , the wall  108 , the wall  109 , and the wall  110 . Note that the recessed portion  82  and the recessed portion  85  share the walls  104  and  105 . The recessed portion  83  and the recessed portion  85  share the wall  106 . The wall  108  extends along an XY plane, and is located further in the Z-axis direction than the wall  104 . The wall  109  extends along an XY plane, and is located further in the Z-axis direction than the wall  104  and further in the -Z-axis direction relative to the wall  108 . The wall  110  extends along a YZ plane, and is located further in the -X-axis direction than the wall  105  and further in the X-axis direction than the wall  106 . The wall  104 , the wall  105 , the wall  106 , the wall  108 , the wall  109 , and the wall  110  project in the -Y-axis direction from the wall  71 . When the wall  71  is viewed in a plan view in the Y-axis direction, the wall  104 , the wall  105 , the wall  106 , the wall  108 , the wall  109 , and the wall  110  surround a part of the wall  71 . Thus, the recessed portion  85  that has the wall  71  as a bottom is configured. 
         [0108]    The recessed portion  86  is located in the Z-axis direction relative to the recessed portion  83 . The recessed portion  86  is located in the Z-axis direction relative to the wall  104 . The recessed portion  86  is partitioned by the wall  71 , the wall  104 , the wall  106 , the wall  109 , and the wall  110 . Note that the recessed portion  85  and the recessed portion  86  also share the wall  104 , the wall  106 , the wall  109 , and the wall  110 . The recessed portion  86  can also be regarded as being partitioned from the recessed portion  85  by the wall  109  and the wall  110 . When the wall  71  is viewed in a plan view in the Y-axis direction, the wall  104 , the wall  106 , the wall  109 , and the wall  110  surround a part of the wall  71 . Thus, the recessed portion  86  that has the wall  71  as a bottom is configured. 
         [0109]    The groove portion  87  is formed between the wall  76  and the wall  105  when the wall  71  is viewed in a plan view in the Y-axis direction. The groove portion  87  is formed between the recessed portion  81  and the recessed portion  82 . The recessed portion  81  and the recessed portion  82  are connected to each other via the groove portion  87 . The groove portion  88  extends from a starting point that is a position on the wall  104  in the Z-axis direction in a location where the wall  104  and the wall  105  intersect each other, is routed in the clockwise direction around the outside of the recessed portion  85  when the wall  71  is viewed in a plan view in the -Y-axis direction, turns and meanders while passing through a position on the wall  72  in the -X-axis direction, and reaches the recessed portion  84 . Note that the recessed portion  67  and the recessed portion  81  are connected to each other via a cutout portion  111  formed in the wall  75 . 
         [0110]    The recessed portion  67 , the recessed portions  81  to  86 , the groove portion  87  and the groove portion  88 , and the cutout portion  111  are formed in a direction of being recessed from the -Y-axis direction to the Y-axis direction. The recessed portion  67 , the recessed portions  81  to  86 , the groove portion  87  and the groove portion  88 , and the cutout portion  111  are surrounded by the joint portion  68  when the wall  71  is viewed in a plan view in the Y-axis direction. Note that, as mentioned above, in the tank  9 A, a face of the sheet member  64  ( FIG. 8 ) that is oriented in the -Y-axis direction corresponds to the back face  54  of the tank  9 A. Therefore, in the tank  9 A, the recessed portion  67 , the recessed portions  81  to  86 , the groove portion  87  and the groove portion  88 , and the cutout portion  111  are provided in the back face  54 . 
         [0111]    Note that the sheet member  64  ( FIG. 8 ) has a size and a shape that allow the sheet member  64  to cover the joint portion  68  which surrounds the recessed portion  67 , the recessed portions  81  to  86 , the groove portion  87  and the groove portion  88 , and the cutout portion  111  when the tank  9 A is viewed in a plan view in the Y-axis direction. Therefore, upon joining the sheet member  64  to the joint portion  68  of the case  63 , the recessed portion  67 , the recessed portions  81  to  86 , the groove portion  87  and the groove portion  88 , and the cutout portion  111  are blocked by the sheet member  64 . Thus, the recessed portion  67  and the recessed portions  81  to  86  are made as chambers that are partitioned from one another. 
         [0112]    Note that a face of the wall  72  of the case  63  illustrated in  FIG. 9  in the -X-axis direction, i.e., a face of the wall  72  on the side opposite to the recessed portion  67  side corresponds to the side face  52  of the tank  9 A illustrated in  FIG. 5 . A face of the wall  73  illustrated in  FIG. 9  in the X-axis direction, i.e., a face of the wall  73  on the side opposite to the recessed portion  67  side corresponds to the side face  55  illustrated in  FIG. 6 . A face of the wall  74  illustrated in  FIG. 9  in the -Z-axis direction, i.e., a face of the wall  74  on the side opposite to the recessed portion  67  side corresponds to the lower face  56  illustrated in  FIG. 6 . A face of the wall  75  illustrated in  FIG. 9  in the Z-axis direction, i.e., a face of the wall  75  on the side opposite to the recessed portion  67  side corresponds to the upper face  53 C illustrated in  FIG. 5 . A face of the wall  108  illustrated in  FIG. 9  in the Z-axis direction, i.e., a face of the wall  108  on the side opposite to the recessed portion  85  side corresponds to the upper face  53 A illustrated in  FIG. 5 . A face of the wall  79  illustrated in  FIG. 9  in the Z-axis direction, i.e., a face of the wall  79  on the side opposite to the recessed portion  67  side corresponds to the upper face  53 B illustrated in  FIG. 5 . 
         [0113]    In the case  63 , a recessed portion  113 , a recessed portion  114 , a recessed portion  115 , a recessed portion  116 , and a recessed portion  117  are formed, as illustrated in  FIG. 10 . Furthermore, the case  63  has a partition wall  121 , a partition wall  122 , a partition wall  123 , a partition wall  124 , and a partition wall  125 . The recessed portions  113  to  117  are located on the side opposite to the recessed portion  67  ( FIG. 9 ) side with the wall  71  therebetween. That is to say, the recessed portions  113  to  117  are located in the Y-axis direction relative to the recessed portion  67  ( FIG. 9 ) with the wall  71  therebetween. Note that the wall  71  of the recessed portion  67  and the wall  71  of the recessed portions  113  to  117  are the same wall. That is to say, in this embodiment, the recessed portion  67  and the recessed portions  113  to  117  share the wall  71 . 
         [0114]    The recessed portion  113  is partitioned by the wall  71  and the partition wall  121 . The partition wall  121  is provided in a face of the wall  71  that is oriented in the Y-axis direction. The partition wall  121  projects in the Y-axis direction from the wall  71 . When the wall  71  is viewed in a plan view in the -Y-axis direction, the region surrounded by the partition wall  121  is the region of the recessed portion  113 . The recessed portion  113  that has the wall  71  as a bottom is included by the wall  71  and the partition wall  121  that surrounds the wall  71 . 
         [0115]    The recessed portion  114  is located in the Z-axis direction relative to the recessed portion  113 . The recessed portion  114  is partitioned by the wall  71  and the partition wall  122 . The partition wall  122  is provided in a face of the wall  71  that is oriented in the Y-axis direction. The partition wall  122  projects in the Y-axis direction from the wall  71 . When the wall  71  is viewed in a plan view in the -Y-axis direction, the region surrounded by the partition wall  122  is the region of the recessed portion  114 . The recessed portion  114  that has the wall  71  as a bottom is included by the wall  71  and the partition wall  122  that surrounds the wall  71 . Note that, in this embodiment, a part of the partition wall  121  and a part of the partition wall  122  overlap each other. Therefore, it may also be assumed that the recessed portion  113  and the recessed portion  114  share a part of the partition wall  121  and a part of the partition wall  122 . 
         [0116]    The recessed portion  115  is formed within the recessed portion  114 . The recessed portion  115  is provided within the recessed portion  114 , independently of the recessed portion  114 . That is to say, the recessed portion  115  is provided in an island-like shape within the recessed portion  114 . The recessed portion  115  is partitioned by the wall  71  and the partition wall  123 . The partition wall  123  is provided in a face of the wall  71  that is oriented in the Y-axis direction. The partition wall  123  projects in the Y-axis direction from the wall  71 . The amount of projection of the partition wall  123  from the wall  71  is smaller than the amount of projection of the partition wall  122  from the wall  71 . When the wall  71  is viewed in a plan view in the -Y-axis direction, the region surrounded by the partition wall  123  is the region of the recessed portion  115 . The recessed portion  115  that has the wall  71  as a bottom is included by the wall  71  and the partition wall  123  that surrounds the wall  71 . 
         [0117]    The recessed portion  116  and the recessed portion  117  are formed within the recessed portion  113 . The recessed portion  116  and the recessed portion  117  are provided within the recessed portion  113 , independently of the recessed portion  113 . That is to say, the recessed portion  116  and the recessed portion  117  are provided in an island-like shape in the recessed portion  113 . The recessed portion  116  is partitioned by the wall  71  and the partition wall  124 . The recessed portion  117  is partitioned by the wall  71  and the partition wall  125 . 
         [0118]    The partition wall  124  and the partition wall  125  are provided in a face of the wall  71  that is oriented in the Y-axis direction. The partition wall  124  and the partition wall  125  project in the Y-axis direction from the wall  71 . When the wall  71  is viewed in a plan view in the -Y-axis direction, the region surrounded by the partition wall  124  is the region of the recessed portion  116 . Similarly, the region surrounded by the partition wall  125  is the region of the recessed portion  117 . The recessed portion  116  that has the wall  71  as a bottom is included by the wall  71  and the partition wall  124  which surrounds the wall  71 , and the recessed portion  117  that has the wall  71  as a bottom is included by the wall  71  and the partition wall  125  which surrounds the wall  71 . 
         [0119]    An end of the partition wall  123  in the Y-axis direction which partitions the recessed portion  115  is set as a joint portion  126 . In  FIG. 10 , the joint portion  126  is hatched for the purpose of clearly illustrating the configuration of the joint portion  126 . The waterproof air-permeable film  65  is joined to the joint portion  126 . The waterproof air-permeable film  65  has a size and a shape that allow the waterproof air-permeable film  65  to cover the recessed portion  115  and the joint portion  126  when the wall  71  is viewed in a plan view in the -Y-axis direction. Therefore, upon joining the waterproof air-permeable film  65  to the joint portion  126 , the recessed portion  115  is blocked by the waterproof air-permeable film  65 . Thus, the recessed portion  115  becomes a chamber partitioned from the recessed portion  114  by the waterproof air-permeable film  65 . 
         [0120]    Ends of the partition wall  121 , the partition wall  122 , the partition wall  124 , and the partition wall  125  in the Y-axis direction are set as the joint portion  127 . In  FIG. 10 , the joint portion  127  is hatched for the purpose of clearly illustrating the configuration of the joint portion  127 . The sheet member  66  is joined to the joint portion  127 . In this embodiment, the case  63  and the sheet member  66  are joined to each other by adhesion. The sheet member  66  has a size and a shape that allow the sheet member  66  to cover the recessed portion  113 , the recessed portion  114 , and the joint portion  127  when the wall  71  is viewed in a plan view in the -Y-axis direction. Therefore, upon the sheet member  66  being joined to the case  63 , the recessed portion  113 , the recessed portion  114 , the recessed portion  116 , and the recessed portion  117  are blocked by the sheet member  66 . Thus, the recessed portion  113 , the recessed portion  114 , the recessed portion  116 , and the recessed portion  117  are made as chambers that are partitioned from one another. Note that since the amount of projection of the partition wall  123  from the wall  71  is smaller than the amount of projection of the partition wall  122  from the wall  71 , a gap is provided in the Z-axis direction between the waterproof air-permeable film  65  and the sheet member  66 . 
         [0121]    Note that, in the tank  9 A, a face of the sheet member  66  that is oriented in the Y-axis direction corresponds to the front face  51  of the tank  9 A, as mentioned above. Therefore, in the tank  9 A, the recessed portion  113 , the recessed portion  114 , the recessed portion  116 , and the recessed portion  117  are provided in the front face  51 . Note that the atmosphere opening portion  58  ( FIG. 7 ) is in communication with the inside of the recessed portion  114 . As illustrated in  FIG. 9 , the liquid supply portion  59  is in communication with the inside of the recessed portion  67 . 
         [0122]    As illustrated in  FIG. 11 , the case  63  is provided with a communicating portion  131  in the wall  71  within the recessed portion  82 . Also, the communicating portion  132  and the communicating portion  133  are provided in the wall  71  within the recessed portion  83 . A communicating portion  134  is provided in the wall  71  within the recessed portion  84 . A communicating portion  135  is provided in the wall  71  within the recessed portion  85 . A communicating portion  136  and a communicating portion  137  are provided in the wall  71  within the recessed portion  86 . In this embodiment, the communicating portions  131  to  137  are provided as through holes formed in the wall  71 . 
         [0123]    As illustrated in  FIG. 12 , the communicating portion  131  and the communicating portion  132  are in communication with the inside of the recessed portion  116 . Therefore, the recessed portion  116  is in communication with the communicating portion  131  and the communicating portion  132 . Accordingly, the recessed portion  82  and the recessed portion  83  are partitioned by the wall  103  as illustrated in  FIG. 11 , but are connected to each other through the communicating portion  131 , the recessed portion  116  ( FIG. 12 ), and the communicating portion  132 . That is to say, the recessed portion  82  and the recessed portion  83  are in communication with each other via the recessed portion  116 . 
         [0124]    As illustrated in  FIG. 12 , the communicating portion  133  and the communicating portion  134  are in communication with the inside of the recessed portion  117 . Therefore, the recessed portion  117  is in communication with the communicating portion  133  and the communicating portion  134 . Accordingly, the recessed portion  83  and the recessed portion  84  are partitioned by the wall  106  as illustrated in  FIG. 11 , but are connected to with each other through the communicating portion  133 , the recessed portion  117  ( FIG. 12 ), and the communicating portion  134 . That is to say, the recessed portion  83  and the recessed portion  84  are in communication with each other via the recessed portion  117 . 
         [0125]    As illustrated in  FIG. 12 , the communicating portion  135  and the communicating portion  136  are in communication with the inside of the recessed portion  113 . Therefore, the recessed portion  113  is in communication with the communicating portion  135  and the communicating portion  136 . Accordingly, the recessed portion  85  and the recessed portion  86  are partitioned by the wall  110  and the wall  109  as illustrated in  FIG. 11 , but are connected to each other through the communicating portion  135 , the recessed portion  113  ( FIG. 12 ), and the communicating portion  136 . That is to say, the recessed portion  85  and the recessed portion  86  are in communication with each other via the recessed portion  113 . Also, as illustrated in  FIG. 12 , the communicating portion  137  is in communication with the inside of the recessed portion  115 . Therefore, the recessed portion  115  is in communication with the inside of the communicating portion  86  ( FIG. 11 ) via the communicating portion  137 . 
         [0126]    Here, the liquid inlet portion  36  is in communication with the inside of the recessed portion  67 , as illustrated in  FIG. 13 , which is a cross-sectional view of the case  63 . Note that  FIG. 13  illustrated a cross-section of the case  63  taken along an XZ plane that passes through the liquid inlet portion  36 . The liquid inlet portion  36  has a liquid inlet port  138  and a side wall  139 . The liquid inlet port  138  is an opening of a through hole provided in the wall  75 , and is open toward the recessed portion  67  side. The liquid inlet port  138  is also an intersecting portion at which the liquid inlet portion  36  and the recessed portion  67  (liquid containing portion  69 ) intersect each other. 
         [0127]    The recessed portion  67  is in communication with the outside of the recessed portion  67  via the liquid inlet port  138  that is a through hole. The side wall  139  is provided in the wall  75  in the Z-axis direction, surrounds the periphery of the liquid inlet port  138 , and forms an ink injection path. The side wall  139  projects in the Z-axis direction from the wall  75 . Note that the liquid inlet portion  36  may employ a configuration in which the side wall  139  projects inward of the recessed portion  67 . In the configuration in which the side wall  139  projects inward of the recessed portion  67  as well, the intersecting portion where the liquid inlet portion  36  and the recessed portion  67  intersect each other is defined as the liquid inlet port  138 . 
         [0128]    Here, the cutout portion  111  is formed in the wall  75 , as illustrated in  FIG. 11 . An opening of the cutout portion  111  that is open toward the recessed portion  67  corresponds to a later-described connecting port between a later-described atmosphere communicating portion and the liquid containing portion  69 . As illustrated in  FIG. 13 , the liquid inlet port  138  is also formed in the wall  75 , and is open toward the recessed portion  67  side of the wall  75 . Thus, in this embodiment, the cutout portion  111  and the liquid inlet port  138  are formed in the wall  75 . Accordingly, in this embodiment, the opening (connecting port) of the cutout portion  111  that is open toward the recessed portion  67  and the liquid inlet port  138  are located in the same position in the vertical direction. 
         [0129]    Upon the sheet member  64  being joined to the case  63  having the above-described configuration, the liquid containing portion  69  and a part of an atmosphere communicating portion  146  are configured in the back face  54  of the tank  9 A, as illustrated in  FIG. 14 . The liquid containing portion  69  is a region surrounded by the recessed portion  67  of the case  63  and the sheet member  64 . A part of the atmosphere communicating portion  146  configured in the back face  54  of the tank  9 A is a region surrounded by the recessed portions  81  to  86 , the groove portion  87  and the groove portion  88 , and the cutout portion  111  that are illustrated in  FIG. 9 , as well as the sheet member  64  ( FIG. 8 ). 
         [0130]    Here, as illustrated in  FIG. 14 , a plurality of support portions  141  are provided in the liquid containing portion  69 . In this embodiment, two support portions  141  are provided. In the following description, when individually identifying the two support portions  141 , the two support portions  141  are denoted respectively as a support portion  141 A and a support portion  141  B. The two support portions  141  are arranged in a line along the X axis. Of the two support portions  141 , the support portion  141 A is located further in the -X-axis direction than the wall  73 . Of the two support portions  141 , the support portion  141 B is located further in the -X-axis direction than the support portion  141 A. 
         [0131]    The two support portions  141  are provided in the wall  71 . As illustrated in  FIG. 9 , the two support portions  141  project in the -Y-axis direction from the wall  71 . The two support portions  141  are separate from the wall  72 , the wall  73 , the wall  74  the wall  75 , the wall  76 , the wall  77 , the wall  78 , and the wall  79 . The two support portions  141  each include an appearance of a plate shape extending along a YZ plane. The amount of projection of the two support portions  141  from the wall  71  is set to be equal to the amount of projection of the walls  72  to  79  from the wall  71 . The joint portions  68  are provided at ends of the two support portions  141  on the side opposite to the wall  71  side, i.e., ends thereof in the -Y-axis direction. That is to say, in the tank  9 A illustrated in  FIG. 14 , the sheet member  64  is also joined to the joint portion  68  of the two support portions  141 . 
         [0132]    In this embodiment, an interval between the wall  73  and the support portion  141 A along the X axis, an interval between the support portion  141 A and the support portion  141 B along the X axis, and an interval between the wall  72  and the support portion  141 B along the X axis are set to be equal to one another. With this configuration, deformation of the sheet member  64  can be equally restricted between the wall  73  and the support portion  141 A, between the support portion  141 A and the support portion  141 B, and between the wall  72  and the support portion  141 B. Note that, in the configuration in which a single support portion  141  is provided, an interval between the wall  73  and the support portion  141  and an interval between the wall  72  and the support portion  141  are set to be equal to each other. Thus, deformation of the sheet member  64  can be equally restricted between the wall  73  and the support portion  141  and between the wall  72  and the support portion  141 . 
         [0133]    Upon the waterproof air-permeable film  65  ( FIG. 10 ) and the sheet member  66  being joined to the case  63 , a part of the atmosphere communicating portion  146  is configured in the front face  51  of the tank  9 A, as illustrated in  FIG. 15 . The part of the atmosphere communicating portion  146  configured in the front face  51  of the tank  9 A is a region surrounded by the recessed portion  113 , the recessed portion  114 , the recessed portion  116 , and the recessed portion  117 , and the sheet member  66  ( FIG. 10 ). The part of the atmosphere communicating portion  146  configured in the front face  51  of the tank  9 A also includes a region surrounded by the recessed portion  115  ( FIG. 10 ) and the waterproof air-permeable film  65 . 
         [0134]    The atmosphere communicating portion  146  also includes the atmosphere opening portion  58 . As illustrated in  FIG. 15 , the atmosphere opening portion  58  includes an atmosphere opening port  147  and an introduction path  148 . The atmosphere opening port  147  is formed in the atmosphere opening portion  58  as appropriate as an opening that is open outward of the tank  9 A. The introduction path  148  constitutes a flow path of the atmosphere that is introduced into the tank  9 A from the atmosphere opening port  147  that is open outward of the tank  9 A. 
         [0135]    The introduction path  148  projects in the -X-axis direction from the wall  106 . The introduction path  148  includes a portion formed due to the thickness of the wall  106  and a portion projecting in the -X-axis direction from the wall  106 . Therefore, the flow path length of the introduction path  148  is equal to a length obtained by adding the length of the portion projecting in the -X-axis direction from the wall  106  and the thickness dimension of the wall  106 . Note that a configuration in which a portion of the introduction path  148  that projects in the -X-axis direction is omitted may also be employed. In the tank  9 A in which the portion of the introduction path  148  that projects in the -X-axis direction is omitted, the flow path length of the introduction path  148  is equal to the thickness dimension of the wall  106 . 
         [0136]    As a result, in the tank  9 A, the atmosphere communicating portion  146  that extends from the atmosphere opening port  147  ( FIG. 15 ) to a connection port  149  between the cutout portion  111  and the liquid containing portion  69  formed in the wall  75  illustrated in  FIG. 14  is configured. Thus, the tank  9 A is configured to be able to introduce the atmosphere into the liquid containing portion  69  from the atmosphere communicating portion  146 . That is to say, the atmosphere communicating portion  146  is in communication with the liquid containing portion  69 . Accordingly, in the tank  9 A, a flow path that extends from the atmosphere opening port  147  and is continuous with the liquid supply portion  59  via the liquid containing portion  69  is configured. A part of this flow path includes the atmosphere communicating portion  146 . 
         [0137]    The flow path extending from the atmosphere opening port  147  to the liquid supply port  59  will now be described with reference to a schematic drawing. Here, the flow path extending from the atmosphere opening port  147  to the liquid supply portion  59  will be schematically described for the purpose of facilitating the understanding. Note that the direction extending from the atmosphere opening port  147  toward the liquid supply port  59  will be considered to be the direction in which a fluid flows. This direction will serve as a basis regarding “upstream” and “downstream”. As illustrated in  FIG. 16 , a flow path  150  extending from the atmosphere opening port  147  to the liquid supply port  59  includes an atmosphere chamber  151 , an atmosphere chamber  152 , an atmosphere chamber  153 , an atmosphere chamber  154 , an atmosphere chamber  155 , a communicating path  156 , an atmosphere chamber  157 , a communicating path  158 , an atmosphere chamber  159 , a communicating path  160 , an atmosphere chamber  161 , a communicating path  162 , a buffer chamber  163 , and a communicating path  164 . 
         [0138]    The atmosphere chamber  151  is provided on the downstream side of the introduction path  148 . The atmosphere chamber  151  is a region surrounded by the recessed portion  114  of the case  63  and the sheet member  66 . The atmosphere chamber  152  is provided on the downstream side of the atmosphere chamber  151 . The atmosphere chamber  152  is a region surrounded by the recessed portion  115  and the waterproof air-permeable film  65 . The atmosphere chamber  152  is located within the atmosphere chamber  151 . The atmosphere can move between the atmosphere chamber  151  and the atmosphere chamber  152  via the waterproof air-permeable film  65 . The atmosphere chamber  153  is provided on the downstream side of the atmosphere chamber  152 . The atmosphere chamber  153  is a region surrounded by the recessed portion  86  of the case  63  and the sheet member  64 . The atmosphere chamber  152  and the atmosphere chamber  153  are in communication with each other via the communicating portion  137  that passes through the wall  71  of the case  63 . Note that an opening of the communicating portion  137  on the atmosphere chamber  152  side is denoted as a communicating port  165 . The communicating port  165  corresponds to a connection port between the atmosphere chamber  152  and the communicating portion  137 . An opening of the communicating portion  137  on the atmosphere chamber  153  side is denoted as a communicating port  166 . The communicating port  166  corresponds to a connection port between the atmosphere chamber  153  and the communicating portion  137 . 
         [0139]    The atmosphere chamber  154  is provided on the downstream side of the atmosphere chamber  153 . The atmosphere chamber  154  is a region surrounded by the recessed portion  113  of the case  63  and the sheet member  66 . The atmosphere chamber  153  and the atmosphere chamber  154  are in communication with each other via the communicating portion  136  that passes through the wall  71  of the case  63 . An opening of the communicating portion  136  on the atmosphere chamber  153  side is denoted as a communicating port  167 . The communicating port  167  corresponds to a connection port between the atmosphere chamber  153  and the communicating portion  136 . An opening of the communicating portion  136  on the atmosphere chamber  154  side is denoted as a communicating port  168 . The communicating port  168  corresponds to a connection port between the atmosphere chamber  154  and the communicating portion  136 . 
         [0140]    The atmosphere chamber  155  is provided on the downstream side of the atmosphere chamber  154 . The atmosphere chamber  155  is a region surrounded by the recessed portion  85  of the case  63  and the sheet member  64 . The atmosphere chamber  154  and the atmosphere chamber  155  are in communication with each other via the communicating portion  135  that passes through the wall  71  of the case  63 . An opening of the communicating portion  135  on the atmosphere chamber  154  side is denoted as a communicating port  169 . The communicating port  169  corresponds to a connection port between the atmosphere chamber  154  and the communicating portion  135 . An opening of the communicating portion  135  on the atmosphere chamber  155  side is denoted as a communicating port  170 . The communicating port  170  corresponds to a connection port between the atmosphere chamber  155  and the communicating portion  135 . 
         [0141]    The communicating path  156  is provided on the downstream side of the atmosphere chamber  155 . The communicating path  156  is a region surrounded by the groove portion  88  of the case  63  and the sheet member  64 . The atmosphere chamber  155  and the communicating path  156  are connected to each other via a communicating port  171 . That is to say, the communicating port  171  corresponds to a connection port between the atmosphere chamber  155  and the communicating path  156 . 
         [0142]    The atmosphere chamber  157  is provided on the downstream side of the communicating path  156 . The atmosphere chamber  157  is a region surrounded by the recessed portion  84  of the case  63  and the sheet member  64 . The communicating path  156  and the atmosphere chamber  157  are connected to each other via a communicating port  172 . That is to say, the communicating port  172  corresponds to a connection port between the communicating path  156  and the atmosphere chamber  157 . 
         [0143]    The communicating path  158  is provided on the downstream side of the atmosphere chamber  157 . The communicating path  158  is a region surrounded by the recessed portion  117  of the case  63  and the sheet member  66 . The atmosphere chamber  157  and the communicating path  158  are in communication with each other via the communicating portion  134  that passes through the wall  71  of the case  63 . An opening of the communicating portion  134  on the atmosphere chamber  157  side is denoted as a communicating port  173 . The communicating port  173  corresponds to a connection port between the atmosphere chamber  157  and the communicating portion  134 . An opening of the communicating portion  134  on the communicating path  158  side is denoted as a communicating port  174 . The communicating port  174  corresponds to a connection port between the communicating path  158  and the communicating portion  134 . 
         [0144]    The atmosphere chamber  159  is provided on the downstream side of the communicating path  158 . The atmosphere chamber  159  is a region surrounded by the recessed portion  83  of the case  63  and the sheet member  64 . The communicating path  158  and the atmosphere chamber  159  are in communication with each other via the communicating portion  133  that passes through the wall  71  of the case  63 . An opening of the communicating portion  133  on the communicating path  158  side is denoted as a communicating port  175 . The communicating port  175  corresponds to a connection port between the communicating path  158  and the communicating portion  133 . An opening of the communicating portion  133  on the atmosphere chamber  159  side is denoted as a communicating port  176 . The communicating port  176  corresponds to a connection port between the atmosphere chamber  159  and the communicating portion  133 . 
         [0145]    The communicating path  160  is provided on the downstream side of the atmosphere chamber  159 . The communicating path  160  is a region surrounded by the recessed portion  116  of the case  63  and the sheet member  66 . The atmosphere chamber  159  and the communicating path  160  are in communication with each other via the communicating portion  132  that passes through the wall  71  of the case  63 . An opening of the communicating portion  132  on the atmosphere chamber  159  side is denoted as a communicating port  177 . The communicating port  177  corresponds to a connection port between the atmosphere chamber  159  and the communicating portion  132 . An opening of the communicating portion  132  on the communicating path  160  side is denoted as a communicating port  178 . The communicating port  178  corresponds to a connection port between the communicating path  160  and the communicating portion  132 . 
         [0146]    The atmosphere chamber  161  is provided on the downstream side of the communicating path  160 . The atmosphere chamber  161  is a region surrounded by the recessed portion  82  of the case  63  and the sheet member  64 . The communicating path  160  and the atmosphere chamber  161  are in communication with each other via the communicating portion  131  that passes through the wall  71  of the case  63 . An opening of the communicating portion  131  on the communicating path  160  side is denoted as a communicating port  179 . The communicating port  179  corresponds to a connection port between the communicating path  160  and the communicating portion  131 . An opening of the communicating portion  131  on the atmosphere chamber  161  side is denoted as a communicating port  180 . The communicating port  180  corresponds to a connection port between the atmosphere chamber  161  and the communicating portion  131 . 
         [0147]    The communicating path  162  is provided on the downstream side of the atmosphere chamber  161 . The communication path  162  is a region surrounded by the groove portion  87  of the case  63  and the sheet member  64 . The atmosphere chamber  161  and the communicating path  162  are connected to each other via a communicating port  181 . That is to say, the communicating port  181  corresponds to a connection port between the atmosphere chamber  161  and the communicating path  162 . 
         [0148]    The buffer chamber  163  is provided on the downstream side of the communicating path  162 . The buffer chamber  163  is a region surrounded by the recessed portion  81  of the case  63  and the sheet member  64 . The communication path  162  and the buffer chamber  163  are connected to each other via a communicating port  182 . That is to say, the communicating port  182  corresponds to a connection port between the communicating path  162  and the buffer chamber  163 . 
         [0149]    The communicating path  164  is provided on the downstream side of the buffer chamber  163 . The communicating path  162  is a region surrounded by the cutout portion  111  of the case  63  and the sheet member  64 . The buffer chamber  163  and the communicating path  164  are connected to each other via a communicating port  183 . That is to say, the communicating port  183  corresponds to a connection port between the buffer chamber  163  and the communicating portion  164 . 
         [0150]    The liquid containing portion  69  is provided on the downstream side of the communicating path  164 . The liquid containing portion  69  is a region surrounded by the recessed portion  67  of the case  63  and the sheet member  64 . The communicating path  164  and the liquid containing portion  69  are connected to each other via the connection port  149 . The connection port  149  is a connection port between the communicating path  164  and the liquid containing portion  69 , and is also a connection port between the atmosphere communicating portion  146  and the liquid containing portion  69 . The liquid supply portion  59  is provided on the downstream side of the liquid containing portion  69 . In this embodiment, the flow path  150  extending from the atmosphere opening port  147  to the liquid supply portion  59  has the above configuration. 
         [0151]    When the ink in the liquid containing portion  69  is supplied to the recording portion  31  ( FIG. 2 ) via the liquid supply portion  59 , the amount of the ink in the liquid containing portion  69  decreases. If the amount of the ink in the liquid containing portion  69  decreases, the air pressure in the liquid containing portion  69  is likely to be lower than the atmospheric pressure. In this embodiment, the atmosphere communicating portion  146  extending from the atmosphere opening port  147  to the communicating path  164  is in communication with the liquid containing portion  69 . Therefore, if the amount of the ink in the liquid containing portion  69  decreases and the air pressure in the liquid containing portion  69  becomes lower than the atmospheric pressure, the atmosphere may be introduced into the liquid containing portion  69  via the atmosphere communicating portion  146 . As a result, the air pressure in the liquid containing portion  69  is likely to be maintained at the atmospheric pressure. 
         [0152]    At this time, the atmosphere introduced in the liquid containing portion  69  flows into the atmosphere chamber  151  from the atmosphere opening port  147  via the introduction path  148 . The atmosphere that has flowed into the atmosphere chamber  151  flows into the atmosphere chamber  152  through the waterproof air-permeable film  65 . The atmosphere that has flowed into the atmosphere chamber  152  flows into the atmosphere chamber  153  from the communicating port  165  through the communicating port  166  of the communicating portion  137 . The atmosphere that has flowed into the atmosphere chamber  153  flows into the atmosphere chamber  154  from the communicating port  167  through the communicating port  168  of the communicating portion  136 . 
         [0153]    The atmosphere that has flowed into the atmosphere chamber  154  flows into the atmosphere chamber  155  from the communicating port  169  through the communicating port  170  of the communicating portion  135 . The atmosphere that has flowed into the atmosphere chamber  155  flows into the atmosphere chamber  157  from the communicating port  171  through the communicating port  172  of the communicating path  156 . The atmosphere that has flowed into the atmosphere chamber  157  flows into the communicating path  158  from the communicating port  173  through the communicating port  174  of the communicating portion  134 . 
         [0154]    The atmosphere that has flowed into the communicating path  158  flows into the atmosphere chamber  159  from the communicating port  175  through the communicating port  176  of the communicating portion  133 . The atmosphere that has flowed into the atmosphere chamber  159  flows into the communicating path  160  from the communicating port  177  through the communicating port  178  of the communicating portion  132 . The atmosphere that has flowed into the communicating path  160  flows into the atmosphere chamber  161  from the communicating port  179  through the communicating port  180  of the communicating portion  131 . 
         [0155]    The atmosphere that has flowed into the atmosphere chamber  161  flows into the buffer chamber  163  from the communicating port  181  through the communicating port  182  of the communicating path  162 . The atmosphere that has flowed into the buffer chamber  163  flows into the liquid containing portion  69  from the communicating port  183  through the connection port  149  of the communicating path  164 . 
         [0156]    In the tank  9 A, the front face  51  and the back face  54  are oriented in different directions. The front face  51  of the tank  9 A is provided with the atmosphere chamber  151 , the atmosphere chamber  152 , the atmosphere chamber  154 , the communicating path  158 , and the communicating path  160 . The back face  54  is provided with the atmosphere chamber  153 , the atmosphere chamber  155 , the communicating path  156 , the atmosphere chamber  157 , the atmosphere chamber  159 , the atmosphere chamber  161 , the communicating path  162 , the buffer chamber  163 , and the communicating path  164 . That is to say, the tank  9 A is provided with the atmosphere communicating portion  146  over different faces of the tank  9 A. Therefore, even if ink enters the atmosphere communicating portion  146  from the liquid containing portion  69 , further progress of the ink can be readily prevented by the atmosphere communicating portion  146  provided over different faces of the tank  9 A. This configuration makes it easy to prevent the ink in the liquid containing portion  69  from leaking out of the tank  9 A from the atmosphere opening port  147  via the atmosphere communicating portion  146 . 
         [0157]    Note that, in the tank  9 A, one of the front face  51  and the back face  54  corresponds to the first face, and the other one of the front face  51  and the back face  54  corresponds to the second face. The atmosphere chamber  151 , the atmosphere chamber  152 , the atmosphere  154 , the communicating path  158 , and the communicating path  160  provided in the front face  51  correspond to one of a first atmosphere chamber and a second atmosphere chamber. The atmosphere chamber  153 , the atmosphere chamber  155 , the communicating path  156 , the atmosphere chamber  157 , the atmosphere chamber  159 , the atmosphere chamber  161 , the communicating path  162 , the buffer chamber  163 , and the communicating path  164  that are provided in the back face  54 , correspond to the other one of the first atmosphere chamber and the second atmosphere chamber. 
         [0158]    In the tank  9 A, the atmosphere communicating portion  146  is provided over different faces, namely the front face  51  and the back face  54 . However, the combination of the faces in which the atmosphere communicating portion  146  is provided is not limited to the combination of the front face  51  and the back face  54 . As a combination of the faces in which the atmosphere communicating portion  146  is provided, any two of the side face  52 , the upper face  53 , the side face  55 , and the lower face  56  can be selected. 
         [0159]    As a combination of the faces in which the atmosphere communicating portion  146  is provided, a combination of the front face  51  and one of the side face  52 , the upper face  53 , the side face  55 , and the lower face  56  may also be employed. In this case, the front face  51  corresponds to the first face, and the one of the side face  52 , the upper face  53 , the side face  55 , and the lower face  56  corresponds to the second face. 
         [0160]    Furthermore, as a combination of the faces in which the atmosphere communicating portion  146  is provided, a combination of the back face  54  and one of the side face  52 , the upper face  53 , the side face  55 , and the lower face  56  may also be employed. In this case, the back face  54  corresponds to the first face, and the one of the side face  52 , the upper face  53 , the side face  55 , and the lower face  56  corresponds to the second face. 
         [0161]    In the tank  9 A, the waterproof air-permeable film  65  is arranged onto the atmosphere chamber  151  that is closest to the atmosphere opening port  147  in the flow path of the atmosphere communicating portion  146 . With this configuration, it is easy to block, at the atmosphere chamber  152 , the progress of the ink that has entered the atmosphere communicating portion  146  from the liquid containing portion  69 . Therefore, the ink that has entered the atmosphere communicating portion  146  from the liquid containing portion  69  can be easily prevented from reaching the atmosphere opening port  147 . 
         [0162]    In the tank  9 A, the connection port  149  ( FIG. 14 ) and the liquid inlet port  138  ( FIG. 13 ) are located in the same position in the vertical direction. When an operator injects ink from the liquid inlet portion  36 , the liquid surface of the ink in the liquid containing portion  69  does not easily become higher in the Z-axis direction than the liquid inlet port  138 . Possible reasons of this include the position of the liquid inlet port  138  being located vertically above the upper limit mark  34  ( FIG. 2 ), or the liquid surface of the ink in the liquid inlet portion  36  being able to be easily checked upon the liquid surface of the ink exceeding the liquid inlet port  138  in the vertically upward direction. Therefore, with a configuration in which the connection port  149  ( FIG. 14 ) and the liquid inlet port  138  ( FIG. 13 ) are located in the same position in the vertical direction, the ink in the liquid containing portion  69  does not easily reach the connection port  149 . As a result, the ink can be readily prevented from entering the atmosphere communicating portion  146  from the liquid containing portion  69 , and therefore, the ink in the liquid containing portion  69  can be readily prevented from leaking out of the tank  9 A from the atmosphere opening port  147  via the atmosphere communicating portion  146 . Note that, with a configuration in which the connection port  149  ( FIG. 14 ) is located vertically above the liquid inlet port  138  ( FIG. 13 ), the above effect can be enhanced. 
         [0163]    The tank  9 A is provided with the support portions  141  ( FIG. 14 ) that project to the sheet member  64  side from the wall  71  of the case  63  in the liquid containing portion  69 . Therefore, for example, the sheet member  64  can be supported by the support portion  141  when the sheet member  64  is pressed toward the wall  71  of the case  63 , i.e., to the inside of the liquid containing portion  69 . This configuration facilitates restriction of bending of the sheet member  64 . As a result, for example, it is possible to reduce shrinkage of the internal volume of the liquid containing portion  69  when the sheet member  64  is pressed toward the inside of the liquid containing portion  69 . Therefore, for example, when the sheet member  64  is pressed to the inside of the liquid containing portion  69 , a flow of the ink in the liquid containing portion  69  into the atmosphere communicating portion  146  from the connection port  149  can be easily avoided. 
         [0164]    Since the tank  9 A is provided with the plurality of support portions  141  in the liquid containing portion  69 , it is possible to further reduce shrinkage of the internal volume of the liquid containing portion  69  when the sheet member  64  is pressed to the inside of the liquid containing portion  69 . Therefore, for example, when the sheet member  64  is pressed to the inside of the liquid containing portion  69 , a flow of the ink in the liquid containing portion  69  into the atmosphere communicating portion  146  from the connection port  149  can be easily avoided. 
         [0165]    In the tank  9 A, the sheet member  64  is joined to the joint portion  68  provided in the support portion  141 . Therefore, a position shift of the sheet member  64  can be readily suppressed. For example, when the air pressure in the liquid containing portion  69  becomes higher than the atmospheric pressure, an increase in the internal volume of the liquid containing portion  69  can be reduced. 
       Embodiment 2 
       [0166]    As illustrated in  FIG. 17 , a tank  9 B according to Embodiment 2 has a case  191 . The tank  9 B according to Embodiment 2 has a configuration similar to the tank  9 A according to Embodiment 1, except that the case  63  according to Embodiment 1 is replaced with a case  191 , and the shape of the sheet member  66  is different. Therefore, in the following description, components similar to those in Embodiment 1 will be assigned the same signs as those in Embodiment 1, and detailed descriptions thereof will be omitted. 
         [0167]    A recessed portion  192  is formed in the case  191 . The case  191  has a wall  193  and a wall  194 . The wall  193  extends along an XZ plane. The wall  193  is located further in the -Y-axis direction than the wall  71 . The wall  194  extends along an XY plane. The wall  194  is located further in the -Z-axis direction than the wall  74 . In the case  191 , the wall  72  and the wall  73  protrude further in the -Z-axis direction than the wall  74 , and are connected to a wall  194 . The wall  72 , the wall  74 , the wall  73 , and the wall  194  project in the Y-axis direction from the wall  193 . The wall  72 , the wall  74 , the wall  73 , and the wall  194  surround the wall  193 . With this configuration, the recessed portion  192  that has the wall  193  as a bottom is configured. Note that, in the tank  9 B, a face of the wall  194  in the -Z-axis direction, i.e., a face of the wall  194  on the side opposite to the recessed portion  192  side is set as the lower face  56 . 
         [0168]    The recessed portion  192  is located further in the -Z-axis direction than the recessed portion  113 . The recessed portion  192  is formed in the direction of being recessed in the -Y-axis direction. The recessed portion  192  is connected to the communicating portion  135  via a groove portion  195 . The recessed portion  192  is also connected to the recessed portion  113  via a cutout portion  196 . That is to say, in the case  191 , the communicating portion  135  is connected to the recessed portion  113  via the groove portion  195 , the recessed portion  192 , and the cutout portion  196 . The case  191  is different from the case  63  according to Embodiment 1 on this point. Except this, the case  191  has a configuration similar to the case  63  according to Embodiment 1. 
         [0169]    In Embodiment 2, the sheet member  66  has a size and a shape that allow the sheet member  66  to cover the recessed portion  113 , the recessed portion  114 , and the recessed portion  192 . Except this, the sheet member  66  according to Embodiment 2 has a configuration similar to the sheet member  66  according to Embodiment 1. 
         [0170]    Upon the sheet member  66  being joined to the case  191 , a communicating path  197 , an atmosphere chamber  198 , and a communicating path  199  are configured as illustrated in  FIG. 18 . The communicating path  197  is a region surrounded by the groove portion  195  and the sheet member  66 . The atmosphere chamber  198  is a region surrounded by the recessed portion  192  and the sheet member  66 . The communicating path  199  is a region surrounded by the cutout portion  196  and the sheet member  66 . Thus, the communicating portion  135  leads to the atmosphere chamber  198  via the communicating path  197 . The atmosphere chamber  198  leads to the atmosphere chamber  154  via the communicating path  199 . 
         [0171]    With the above configuration, the atmosphere communicating portion  146  in the tank  9 B has a configuration in which the communicating path  197 , the atmosphere chamber  198 , and the communicating path  199  are added to the atmosphere communicating portion  146  according to Embodiment 1, as illustrated in  FIG. 19 . That is to say, a flow path  200  according to Embodiment 2 has a configuration in which the communicating path  197 , the atmosphere chamber  198 , and the communicating path  199  are added to the flow path  150  according to Embodiment 1. Except this point, the flow path  200  according to Embodiment 2 has a configuration similar to the flow path  150  according to Embodiment 1. Therefore, components of the flow path  200  according to Embodiment 2 that are similar to those according to Embodiment 1 will be assigned the same signs as those in Embodiment 1, and detailed descriptions thereof will be omitted. 
         [0172]    The communicating path  199  is provided on the downstream side of the atmosphere chamber  154 . The atmosphere chamber  198  is provided on the downstream side of the communicating path  199 . The communicating path  197  is provided on the downstream side of the atmosphere chamber  198 . The atmosphere chamber  198  is in communication with the atmosphere chamber  154  via the communicating path  199 . An opening of the communicating path  199  on the atmosphere chamber  154  side is denoted as a communicating port  201 . The communicating port  201  corresponds to a connection port between the atmosphere chamber  154  and the communicating path  199 . An opening of the communicating path  199  on the atmosphere chamber  198  side is denoted as a communicating port  202 . The communicating port  202  corresponds to a connection port between the atmosphere chamber  198  and the communicating path  199 . 
         [0173]    The atmosphere chamber  198  is in communication with the communicating portion  135  via the communicating path  197 . The communicating portion  135  is in communication with the atmosphere chamber  155 . That is to say, the atmosphere chamber  198  is in communication with the atmosphere chamber  155  via the communicating path  197  and the communicating portion  135 . An opening of the communicating path  197  on the atmosphere chamber  198  side is denoted as a communicating port  203 . The communicating port  203  corresponds to a connection port between the atmosphere chamber  198  and the communicating path  197 . An opening of the communicating path  197  on the communicating portion  135  side is the communicating port  169 , similarly as in Embodiment 1. In Embodiment 2, the communicating port  169  corresponds to a connection port between the communicating path  197  and the communicating portion  135 . 
         [0174]    The atmosphere that has flowed into the atmosphere chamber  154  from the atmosphere chamber  153  flows into the atmosphere chamber  198  from the communicating port  201  through the communicating port  202  of the communicating path  197 . The atmosphere that has flowed into the atmosphere chamber  198  flows into the communicating portion  135  from the communicating port  203  through the communicating port  169  of the communicating path  199 . The atmosphere that has flowed into the communicating portion  135  flows into the atmosphere chamber  155  through the communicating port  170 . A portion of the flow path  200  upstream of the atmosphere chamber  154  and a portion thereof downstream of the atmosphere chamber  155  are similar to the flow path  150  according to Embodiment 1. Therefore, a description of the flow of the atmosphere in a portion of the flow path  200  that is similar to the flow path  150  will be omitted. Embodiment 2 can also achieve effects similar to Embodiment 1. 
         [0175]    Furthermore, in Embodiment 2, as compared with Embodiment 1, the communicating path  197 , the atmosphere chamber  198 , and the communicating path  199  are added. Therefore, even if ink enters the atmosphere communicating portion  146  from the liquid containing portion  69 , the ink that has entered the atmosphere communicating portion  146  can be more readily prevented from leaking out of the tank  9 B from the atmosphere opening port  147 . 
         [0176]    Note that, in the tank  9 B, one of the front face  51  and the back face  54  corresponds to a first face, and the other one of the front face  51  and the back face  54  corresponds to a second face. The atmosphere chambers  151 , the atmosphere chamber  152 , the atmosphere chamber  154 , the atmosphere chamber  198 , the communicating path  158 , and the communicating path  160  that are provided in the front face  51 , correspond to one of a first atmosphere chamber and a second atmosphere chamber. The atmosphere chamber  153 , the atmosphere chamber  155 , the communicating path  156 , the atmosphere chamber  157 , the atmosphere chamber  159 , the atmosphere chamber  161 , the communicating path  162 , the buffer chamber  163 , and the communicating path  164  that are provided in the back face  54 , correspond to the other one of the first atmosphere chamber and the second atmosphere chamber. 
       Embodiment 3 
       [0177]    As illustrated in  FIG. 20 , a tank  9 C according to Embodiment 3 has the liquid inlet portion  36 , the atmosphere opening portion  58 , and the liquid supply portion  59 . Note that the tank  9 C according to Embodiment 3 has components having functions similar to the components of the tank  9 A according to Embodiment 1. Therefore, components of the tank  9 C according to Embodiment 3 that include functions similar to the components of the tank  9 A according to Embodiment 1 will be assigned the same signs as the components of the tank  9 A according to Embodiment 1, and detailed descriptions thereof will be omitted. 
         [0178]    In the tank  9 C according to Embodiment 3, in the usage posture, the liquid inlet portion  36  is oriented in a direction that intersects the Z axis. When the ink is injected into the tank  9 C from the liquid inlet portion  36 , the operator changes the posture of the tank  9 C such that the liquid inlet portion  36  is oriented in the Z-axis direction, as illustrated in  FIG. 21 . The posture of the tank  9 C in which the liquid inlet portion  36  is oriented in the Z-axis direction will be called an injection posture of the tank  9 C. That is to say, with the tank  9 C according to Embodiment 3, when the ink is injected into the tank  9 C from the liquid inlet portion  36 , the operator changes the posture of the tank  9 C from the usage posture illustrated in  FIG. 20  to the injection posture illustrated in  FIG. 21 , and thereafter injects the ink from the liquid inlet portion  36 . 
         [0179]    In the following description of the tank  9 C, the tank  9 C is assumed to be in the injection posture unless stated otherwise. That is to say, unless stated otherwise, the description of the tank  9 C will be given regarding the injection posture in which the liquid inlet portion  36  of the tank  9 C is oriented vertically upward. 
         [0180]    As illustrated in  FIG. 21 , the tank  9 C has the front face  51 , the upper face  53 , and the side face  55 . Similarly as in Embodiment 1, the upper face  53  can be identified individually as the upper face  53 A, the upper face  53 B, and the upper face  53 C. As illustrated in  FIG. 22 , the tank  9 C has the side face  52 , the back face  54 , and the lower face  56 . The front face  51 , the side face  52 , the upper face  53 , the back face  54 , the side face  55 , and the lower face  56  are oriented in the respective directions similar to those in Embodiment 1. 
         [0181]    As illustrated in  FIG. 21 , in the tank  9 C, the atmosphere opening portion  58  is provided in the upper face  53 A. In the tank  9 C, the atmosphere opening portion  58  projects in the Z-axis direction from the upper face  53 A, and is oriented in the Z-axis direction. Also, in the tank  9 C, the liquid supply portion  59  is oriented in the Z-axis direction, as illustrated in  FIG. 22 . 
         [0182]    As illustrated in  FIG. 23 , the tank  9 C has a case  205 , the sheet member  64 , the waterproof air-permeable film  65 , the sheet member  66 , and a sheet member  206 . The case  205  is made of a material similar to the case  63  according to Embodiment 1. The sheet member  64 , the waterproof air-permeable film  65 , and the sheet member  66  are made of respective materials that are similar to those in Embodiment 1. The sheet member  206  is made of synthetic resin (e.g., nylon, polypropylene, etc.) formed in a film shape, and is flexible. In the tank  9 C, a face of the sheet member  64  oriented in the -Y-axis direction corresponds to the back face  54  of the tank  9 C, similarly as in Embodiment 1. Similarly, a face of the sheet member  66  oriented in the Y-axis direction corresponds to the front face  51  of the tank  9 C. 
         [0183]    As illustrated in  FIG. 24 , the case  205  has a wall  211 , a wall  212 , a wall  213 , a wall  214 , a wall  215 , a wall  216 , a wall  217 , a wall  218 , a wall  219 , a wall  220 , a wall  221 , a wall  222 , a wall  223 , a wall  224 , a wall  225 , a wall  226 , a wall  227 , and a wall  228 . The walls  211  to  228  are not limited to flat walls, and may include recesses and projections, steps, or the like. 
         [0184]    The wall  211  extends along an XZ plane.  17  walls, namely the walls  212  to  228  intersect the wall  211 .  17  walls, namely the walls  212  to  228  project in the -Y-axis direction from the wall  211 . When the wall  211  is viewed in a plan view in the Y-axis direction, eight walls, namely the walls  212  to  219  surround the wall  211 . The wall  211  and eight walls that are the walls  212  to  219  constitute a recessed portion  231  that has the wall  211  as a bottom. 
         [0185]    The wall  212  and the wall  213  are provided in positions opposing each other with a gap therebetween along the X axis, and extend along a YZ plane. The wall  213  is located further in the X-axis direction than the wall  212 . The wall  214  is located in the -Z-axis direction relative to the wall  212  and the wall  213 , and intersects the wall  212  and the wall  213 . When the wall  211  is viewed in a plan view in the Y-axis direction, the walls  215  to  219  are located further in the Z-axis direction than the wall  214 . The wall  215  is located further in the X-axis direction than the walls  216  to  219 , and intersects the wall  213 . The wall  219  is located further in the -X-axis direction than the walls  215  to  218 , and intersects the wall  212 . The wall  216  is located in the -X-axis direction relative to the wall  215 , and extends along a YZ plane. The wall  217  is located in the -X-axis direction relative to the wall  216 , and extends along an XY plane. The wall  218  is located in the -X-axis direction relative to the wall  217 , and extends along a YZ plane. The wall  219  is located in the -X-axis direction relative to the wall  218 , and extends along an XY plane. 
         [0186]    In the case  205 , a recessed portion  232 , a recessed portion  233 , a recessed portion  234 , a recessed portion  235 , a recessed portion  236 , a recessed portion  237 , and a groove portion  238  are formed. The recessed portion  232  is located in the Z-axis direction relative to the wall  219 . The recessed portion  232  is partitioned by the wall  211 , the wall  217 , the wall  218 , the wall  219 , the wall  212 , the wall  220 , the wall  221 , the wall  222 , and the wall  223 . 
         [0187]    The wall  220  extends along an XY plane, and is located further in the Z-axis direction than the wall  219 . The wall  220  intersects the wall  212 . The wall  221  extends along a YZ plane, and is located further in the -X-axis direction than the wall  218  and is located further in the Z-axis direction than the wall  219 . The wall  221  intersects the wall  220 . The wall  222  extends along an XY plane, and is located further in the Z-axis direction relative to the wall  217 . The wall  222  intersects the wall  221 . The wall  223  extends along a YZ plane, and is located further in the X-axis direction than the wall  221 . The wall  223  intersects the wall  222  and the wall  217 . When the wall  211  is viewed in a plan view in the Y-axis direction, the wall  217 , the wall  218 , the wall  219 , the wall  212 , the wall  220 , the wall  221 , the wall  222 , and the wall  223  surround a part of the wall  211 . With this configuration, the recessed portion  232  that has the wall  211  as a bottom is configured. 
         [0188]    The recessed portion  233  is located further in the Z-axis direction than the recessed portion  232 . The recessed portion  233  is partitioned by the wall  211 , the wall  221 , the wall  222 , the wall  224 , and the wall  225 . The wall  224  extends along an XY plane, and is located further in the Z-axis direction relative to the wall  222 . The wall  224  intersects the wall  221 . The wall  225  extends along a YZ plane, and is located further in the X-axis direction than the wall  221  and is located further in the -X-axis direction than the wall  223 . The wall  225  intersects the wall  222  and the wall  224 . When the wall  211  is viewed in a plan view in the Y-axis direction, the wall  221 , the wall  222 , the wall  224 , and the wall  225  surround a part of the wall  211 . With this configuration, the recessed portion  233  that has the wall  211  as a bottom is configured. 
         [0189]    The recessed portion  234  is located in the Z-axis direction relative to the recessed portion  231  and in the X-axis direction relative to the recessed portion  233 . The recessed portion  234  is partitioned by the wall  211 , the wall  217 , the wall  223 , the wall  222 , the wall  225 , the wall  224 , and the wall  226 . The wall  226  extends along a YZ plane, and is located further in the X-axis direction than the wall  223 . The wall  226  intersects the wall  224  and the wall  217 . When the wall  211  is viewed in a plan view in the Y-axis direction, the wall  217 , the wall  223 , the wall  222 , the wall  225 , the wall  224 , and the wall  226  surround a part of the wall  211 . With this configuration, the recessed portion  234  that has the wall  211  as a bottom is configured. 
         [0190]    The recessed portion  235  is located in the Z-axis direction relative to the recessed portion  231  and in the X-axis direction relative to the recessed portion  234 . The recessed portion  235  is partitioned by the wall  211 , the wall  217 , the wall  226 , the wall  224 , and the wall  227 . The wall  227  extends along a YZ plane, and is located further in the X-axis direction than the wall  226  and is located further in the -X-axis direction than the wall  216 . The wall  227  intersects the wall  224  and the wall  217 . When the wall  211  is viewed in a plan view in the Y-axis direction, the wall  217 , the wall  226 , the wall  224 , and the wall  227  surround a part of the wall  211 . With this configuration, the recessed portion  235  that has the wall  211  as a bottom is configured. 
         [0191]    The recessed portion  236  is located in the Z-axis direction relative to the recessed portion  231  and in the X-axis direction relative to the recessed portion  235 . The recessed portion  236  is partitioned by the wall  211 , the wall  216 , the wall  217 , the wall  227 , and the wall  228 . The wall  228  extends along an XY plane, and is located further in the Z-axis direction than the wall  217  and further in the -Z-axis direction than the wall  224 . The wall  228  intersects the wall  216  and the wall  227 . When the wall  211  is viewed in a plan view in the Y-axis direction, the wall  216 , the wall  217 , the wall  227 , and the wall  228  surround a part of the wall  211 . With this configuration, the recessed portion  236  that has the wall  211  as a bottom is configured. 
         [0192]    The recessed portion  237  is located in the Z-axis direction relative to the recessed portion  236  and in the X-axis direction relative to the recessed portion  235 . The recessed portion  237  is partitioned by the wall  211 , the wall  216 , the wall  228 , the wall  227 , and the wall  224 . When the wall  211  is viewed in a plan view in the Y-axis direction, the wall  216 , the wall  228 , the wall  227 , and the wall  224  surround a part of the wall  211 . With this configuration, the recessed portion  237  that has the wall  211  as a bottom is configured. 
         [0193]    When the wall  211  is viewed in a plan view in the Y-axis direction, the groove portion  238  is located at a portion where the wall  212  intersects the wall  220 . The groove portion  238  is provided in a region spanned across the wall  219  along the Z axis, and is in communication with the recessed portion  231  and the recessed portion  232 . That is to say, the recessed portion  231  and the recessed portion  232  are connected to each other via the groove portion  238 . 
         [0194]    A cutout portion  241  is formed in the wall  222  that partitions the recessed portion  232  and the recessed portion  233 . The recessed portion  232  is connected to the recessed portion  233  via the cutout portion  241 . Also, a cutout portion  242  is formed in the wall  225  that partitions the recessed portion  233  and the recessed portion  234 . The recessed portion  233  is connected to the recessed portion  234  via the cutout portion  242 . A cutout portion  243  is formed in the wall  226  that partitions the recessed portion  234  and the recessed portion  235 . The recessed portion  234  is connected to the recessed portion  235  via the cutout portion  243 . 
         [0195]    The recessed portions  231  to  237 , the groove portion  238 , and the cutout portions  241  to  243  are formed in a direction of being recessed from the -Y-axis direction to the Y-axis direction. The recessed portions  231  to  237 , the groove portion  238 , and the cutout portions  241  to  243  are surrounded by the joint portion  68  when the wall  211  is viewed in a plan view in the Y-axis direction. Note that, in the tank  9 C, a face of the sheet member  64  ( FIG. 22 ) that is oriented in the -Y-axis direction corresponds to the back face  54  ( FIG. 22 ) of the tank  9 C, as mentioned above. Therefore, in the tank  9 C, the recessed portions  231  to  237 , the groove portion  238 , and the cutout portions  241  to  243  are provided in the back face  54 . 
         [0196]    Note that the sheet member  64  ( FIG. 22 ) has a size and a shape that allow the sheet member  64  to cover the joint portion  68  ( FIG. 24 ) that surrounds the recessed portions  231  to  237 , the groove portion  238 , and the cutout portions  241  to  243 , when the tank  9 C is viewed in a plan view in the Y-axis direction. Therefore, upon the sheet member  64  being joined to the joint portion  68  of the case  205 , the recessed portions  231  to  237 , the groove portion  238 , and the cutout portions  241  to  243  are blocked by the sheet member  64 . Thus, the recessed portions  231  to  237  are made as chambers that are partitioned from one another. 
         [0197]    Note that, in Embodiment 3 as well, the support portions  141  are provided within the recessed portion  231  of the case  205 , similarly as in Embodiment 1. In Embodiment 3 as well, the joint portion  68  is provided at an end of each support portion  141  in the -Y-axis direction, similarly as in Embodiment 1. In Embodiment 3, the support portions  141  extend along an XY plane. Embodiment 3 is different from Embodiment 1 in this point. 
         [0198]    A face of the wall  212  of the case  205  illustrated in  FIG. 24  in the -X-axis direction, i.e., a face of the wall  212  on the side opposite to the recessed portion  231  side corresponds to the side face  52  of the tank  9 C illustrated in  FIG. 22 . A face of the wall  213  illustrated in  FIG. 24  in the X-axis direction, i.e., a face of the wall  213  on the side opposite to the recessed portion  231  side corresponds to the side face  55  illustrated in  FIG. 21 . A face of the wall  214  illustrated in  FIG. 24  in the -Z-axis direction, i.e., a face of the wall  214  on the side opposite to the recessed portion  231  side corresponds to the lower face  56  illustrated in  FIG. 22 . A face of the wall  215  illustrated in  FIG. 24  in the Z-axis direction, i.e., a face of the wall  215  on the side opposite to the recessed portion  231  side corresponds to the upper face  53 C illustrated in  FIG. 21 . A face of the wall  224  illustrated in  FIG. 24  in the Z-axis direction, i.e., a face of the wall  224  on the side opposite to the recessed portion  235  side corresponds to the upper face  53 A illustrated in  FIG. 21 . A face of the wall  220  illustrated in  FIG. 24  in the Z-axis direction, i.e., a face of the wall  220  on the side opposite to the recessed portion  231  side corresponds to the upper face  53 B illustrated in  FIG. 21 . 
         [0199]    As illustrated in  FIG. 25 , a recessed portion  251 , a recessed portion  252 , and a recessed portion  253  are formed in the case  205 . Furthermore, the case  205  has a partition wall  254 , a partition wall  255 , and a partition wall  256 . The recessed portion  251  is located on the side opposite to the recessed portion  231  ( FIG. 24 ) side with the wall  211  therebetween. That is to say, the recessed portion  251  is located in the Y-axis direction relative to the recessed portion  231  ( FIG. 24 ) with the wall  211  therebetween. Note that the wall  211  of the recessed portion  231  and the wall  211  of the recessed portion  251  are the same wall as each other. That is to say, in this embodiment, the recessed portion  231  and the recessed portion  251  share the wall  211 . 
         [0200]    The recessed portion  251  is partitioned by the wall  211  and the partition wall  254 . The partition wall  254  is provided on a face of the wall  211  that is oriented in the Y-axis direction. The partition wall  254  projects in the Y-axis direction from the wall  211 . When the wall  211  is viewed in a plan view in the -Y-axis direction, a region surrounded by the partition wall  254  is the region of the recessed portion  251 . The wall  211  and the partition wall  254  that surrounds the wall  211  constitute the recessed portion  251  that has the wall  211  as a bottom. The recessed portion  251  is formed in the direction of being recessed in the -Y-axis direction. 
         [0201]    An end of the partition wall  254  in the Y-axis direction is set as a joint portion  257 . In  FIG. 25 , the joint portion  257  is hatched for the purpose of clearly illustrating the configuration of the joint portion  257 . The sheet member  66  ( FIG. 23 ) is joined to the joint portion  257 . In this embodiment, the case  205  is joined to the sheet member  66  by means of adhesion. The sheet member  66  has a size and a shape that allow the sheet member  66  to cover the recessed portion  251  and the joint portion  257  when the wall  211  illustrated in  FIG. 25  is viewed in a plan view in the -Y-axis direction. Therefore, upon the sheet member  66  being joined to the case  205 , the recessed portion  251  is blocked by the sheet member  66 . Thus, the recessed portion  251  is made as a chamber. 
         [0202]    The recessed portion  252  and the recessed portion  253  are formed on the upper face  53 A of the wall  224 . The recessed portion  252  and the recessed portion  253  are formed in a direction of being recessed in the -Z-axis direction from the wall  224 . As illustrated in  FIG. 26 , which is an enlarged view of an area A in  FIG. 25 , a face  261  is formed in the wall  224 . The face  261  is located further in the -Z-axis direction than the upper face  53 A of the wall  224 . The recessed portion  252  is partitioned by the face  261  of the wall  224  and the partition wall  255 . The partition wall  255  is provided in the face  261 , and projects in the Z-axis direction from the face  261 . When the wall  224  is viewed in a plan view in the -Z-axis direction, a region surrounded by the partition wall  255  is the region of the recessed portion  252 . The face  261  and the partition wall  255  that surrounds the face  261  constitute the recessed portion  252  that has the face  261  as a bottom. Note that the recessed portion  252  is formed in a direction of being recessed in the -Z-axis direction. 
         [0203]    When the wall  224  is viewed in a plan view in the -Z-axis direction, the recessed portion  253  is located in a region surrounded by the partition wall  255 . That is to say, the recessed portion  253  is provided within the recessed portion  252 . The recessed portion  253  is partitioned by the face  261  of the wall  224  and the partition wall  256 . The partition wall  256  is provided in the face  261 , and projects in the Z-axis direction from the face  261 . The amount of projection of the partition wall  256  from the face  261  is smaller than the amount of projection of the partition wall  255  from the face  261 . When the wall  224  is viewed in a plan view in the -Z-axis direction, a region surrounded by the partition wall  256  is the region of the recessed portion  253 . The face  261  and the partition wall  256  that surrounds the face  261  constitute the recessed portion  253  that has the face  261  as a bottom. Note that the recessed portion  253  is formed in a direction of being recessed in the -Z-axis direction. 
         [0204]    An end in the Z-axis direction of the partition wall  256  that partitions the recessed portion  253  is set as the joint portion  262 . In  FIG. 26 , the joint portion  262  is hatched for the purpose of clearly illustrating the configuration of the joint portion  262 . The waterproof air-permeable film  65  ( FIG. 23 ) is joined to the joint portion  262 . The waterproof air-permeable film  65  has a size and a shape that allow the waterproof air-permeable film  65  to cover the recessed portion  253  and the joint portion  262  when the wall  224  is viewed in a plan view in the -Z-axis direction. Therefore, upon the joint portion  262  being joined to the waterproof air-permeable film  65 , the recessed portion  253  is blocked by the waterproof air-permeable film  65 . Thus, the recessed portion  253  is made as a chamber that is partitioned from the recessed portion  252  by the waterproof air-permeable film  65 . 
         [0205]    An end in the Z-axis direction of the partition wall  255  that partitions the recessed portion  252  is set as the joint portion  263 . In  FIG. 26 , the joint portion  263  is hatched for the purpose of clearly illustrating the configuration of the joint portion  263 . The sheet member  206  ( FIG. 23 ) is joined to the joint portion  263 . The sheet member  206  has a size and a shape that allow the sheet member  206  to cover the recessed portion  252  and the joint portion  263  when the wall  224  is viewed in a plan view in the -Z-axis direction. Therefore, upon the joint portion  263  being joined to the sheet member  206 , the recessed portion  252  is blocked by the sheet member  206 . Thus, the recessed portion  253  is made as a chamber. Note that since the amount of projection of the partition wall  256  from the face  261  is smaller than the amount of projection of the partition wall  255  from the face  261 , a gap is provided in the Z-axis direction between the waterproof air-permeable film  65  and the sheet member  206 . 
         [0206]    In the case  205 , a communicating portion  265  is provided in the wall  211  in the recessed portion  235 , as illustrated in  FIG. 27 . A communicating portion  266  is provided in the wall  211  in the recessed portion  236 . In this embodiment, the communicating portion  265  and the communicating portion  266  are provided as through holes formed in the wall  211 . As illustrated in  FIG. 28 , the communicating portion  265  and the communicating portion  266  are in communication with the inside of the recessed portion  251 . Therefore, the recessed portion  251  is in communication with the communicating portion  265  and the communicating portion  266 . Accordingly, as illustrated in  FIG. 27 , the recessed portion  235  and the recessed portion  236  are partitioned from each other by the wall  227 , but are connected to each other through the communicating portion  265 , the recessed portion  251  ( FIG. 28 ), and the communicating portion  266 . That is to say, the recessed portion  235  and the recessed portion  236  are in communication with each other via the recessed portion  251 . 
         [0207]    In the case  205 , a communicating portion  267  is provided in the wall  224  in the recessed portion  253 , as illustrated in  FIG. 29 . A communicating portion  268  is provided in the wall  224  in the recessed portion  252 . In this embodiment, the communicating portion  267  and the communicating portion  268  are provided as through holes formed in the wall  224 . Furthermore, the communicating portion  267  also passes through from the wall  224  to the wall  228  ( FIG. 27 ). The communicating portion  267  is in communication with the inside of the recessed portion  236 . The communicating portion  268  is in communication with the recessed portion  237 . In the case  205 , the atmosphere opening portion  58  ( FIG. 29 ) also passes through the wall  224  and is in communication with the recessed portion  237  ( FIG. 27 ). 
         [0208]    With the above configuration, the communicating portion  267  illustrated in  FIG. 29  is in communication with the recessed portion  253  and the recessed portion  236  ( FIG. 27 ), and therefore, the recessed portion  253  and the recessed portion  236  are in communication with each other through the communicating portion  267 . Also, since the communicating portion  268  illustrated in  FIG. 29  and the atmosphere opening portion  58  are connected to the recessed portion  237 , the recessed portion  253  and the atmosphere opening portion  58  are connected to each other through the recessed portion  237  ( FIG. 27 ). That is to say, the recessed portion  253  and the atmosphere opening portion  58  are in communication with each other via the recessed portion  237 . 
         [0209]    A flow path  270  extending from the atmosphere opening port  147  to the liquid supply portion  59  will now be described with reference to a schematic diagram. Here, the flow path  270  extending from the atmosphere opening port  147  to the liquid supply portion  59  will be schematically described for the purpose of facilitating understanding. Note that the direction extending from the atmosphere opening port  147  to the liquid supply portion  59  will be considered to be the direction in which a fluid flows. This direction will serve as a basis of “upstream” and “downstream”. The flow path  270  extending from the atmosphere opening port  147  to the liquid supply portion  59  includes the atmosphere communicating portion  146 , the liquid containing portion  69 , and the liquid supply portion  59 , as illustrated in  FIG. 30 . 
         [0210]    The atmosphere communicating portion  146  includes an atmosphere chamber  271 , an atmosphere chamber  272 , an atmosphere chamber  273 , an atmosphere chamber  274 , an atmosphere chamber  275 , an atmosphere chamber  276 , an atmosphere chamber  277 , an atmosphere chamber  278 , and an atmosphere chamber  279 . The atmosphere communicating portion  146  includes a communicating path  281 , a communicating path  282 , a communicating path  283 , and a communicating path  284 . 
         [0211]    The atmosphere chamber  271  is provided on the downstream side of the introduction path  148 . The atmosphere chamber  271  is a region surrounded by the recessed portion  237  of the case  205  and the sheet member  64 . Note that an opening of the introduction path  148  on the atmosphere chamber  271  side is denoted as a communicating port  285 . The communicating port  285  corresponds to a connection port between the atmosphere chamber  271  and the introduction path  148 . 
         [0212]    The atmosphere chamber  272  is provided on the downstream side of the atmosphere chamber  271 . The atmosphere chamber  272  is a region surrounded by the recessed portion  252  and the sheet member  206 . The atmosphere chamber  271  and the atmosphere chamber  272  are in communication with each other via the communicating portion  268  that passes through the wall  224  of the case  205 . Note that an opening of the communicating portion  268  on the atmosphere chamber  271  side is denoted as a communicating port  286 . The communicating port  286  corresponds to a connection port between the atmosphere chamber  271  and the introduction path  268 . An opening of the communicating portion  268  on the atmosphere chamber  272  side is denoted as a communicating port  287 . The communicating port  287  corresponds to a connection port between the atmosphere chamber  272  and the communicating portion  268 . 
         [0213]    The atmosphere chamber  273  is a region surrounded by the recessed portion  253  and the waterproof air-permeable film  65 . The atmosphere chamber  273  is located in the atmosphere chamber  272 . The atmosphere can move between the atmosphere chamber  272  and the atmosphere chamber  273  via the waterproof air-permeable film  65 . The atmosphere chamber  274  is provided on the downstream side of the atmosphere chamber  273 . The atmosphere chamber  274  is a region surrounded by the recessed portion  236  of the case  205  and the sheet member  64 . The atmosphere chamber  273  and the atmosphere chamber  274  are in communication with each other via the communicating portion  267  that passes through the wall  224  of the case  205 . Note that an opening of the communicating portion  267  on the atmosphere chamber  273  side is denoted as a communicating port  288 . The communicating port  288  corresponds to a connection port between the atmosphere chamber  273  and the communicating portion  267 . An opening of the communicating portion  267  on the atmosphere chamber  274  side is denoted as a communicating port  289 . The communicating port  289  corresponds to a connection port between the atmosphere chamber  274  and the communicating portion  267 . 
         [0214]    The atmosphere chamber  275  is provided on the downstream side of the atmosphere chamber  274 . The atmosphere chamber  275  is a region surrounded by the recessed portion  251  of the case  205  and the sheet member  66 . The atmosphere chamber  274  and the atmosphere chamber  275  are in communication with each other via the communicating portion  266  that passes through the wall  211  of the case  205 . Note that an opening of the communicating portion  266  on the atmosphere chamber  274  side is denoted as a communicating port  290 . The communicating port  290  corresponds to a connection port between the atmosphere chamber  274  and the communicating portion  266 . Note that an opening of the communicating portion  266  on the atmosphere chamber  275  side is denoted as a communicating port  291 . The communicating port  291  corresponds to a connection port between the atmosphere chamber  275  and the communicating portion  266 . 
         [0215]    The atmosphere chamber  276  is provided on the downstream side of the atmosphere chamber  275 . The atmosphere chamber  276  is a region surrounded by the recessed portion  235  of the case  205  and the sheet member  64 . The atmosphere chamber  275  and the atmosphere chamber  276  are in communication with each other via the communicating portion  265  that passes through the wall  211  of the case  205 . Note that an opening of the communicating portion  265  on the atmosphere chamber  275  side is denoted as a communicating port  292 . The communicating port  292  corresponds to a connection port between the atmosphere chamber  275  and the communicating portion  265 . An opening of the communicating portion  265  on the atmosphere chamber  276  side is denoted as a communicating port  293 . The communicating port  293  corresponds to a connection port between the atmosphere chamber  276  and the communicating portion  265 . 
         [0216]    The communicating path  281  is provided on the downstream side of the atmosphere chamber  276 . The communicating path  281  is a region surrounded by the cutout portion  243  of the case  205  and the sheet member  64 . The atmosphere chamber  276  and the communicating path  281  are connected to each other via a communicating port  294 . That is to say, the communicating port  294  corresponds to a connection port between the atmosphere chamber  276  and the communicating path  281 . 
         [0217]    The atmosphere chamber  277  is provided on the downstream side of the communication path  281 . The atmosphere chamber  277  is a region surrounded by the recessed portion  234  of the case  205  and the sheet member  64 . The communicating path  281  and the atmosphere chamber  277  are connected to each other via a communicating port  295 . That is to say, the communicating port  295  corresponds to a connection port between the communicating path  281  and the atmosphere chamber  277 . 
         [0218]    The communicating path  282  is provided on the downstream side of the atmosphere chamber  277 . The communication path  282  is a region surrounded by the cutout portion  242  of the case  205  and the sheet member  64 . The atmosphere chamber  277  and the communicating path  282  are connected to each other via a communicating port  296 . That is to say, the communicating port  296  corresponds to a connection port between the atmosphere chamber  277  and the communicating path  282 . 
         [0219]    The atmosphere chamber  278  is provided on the downstream side of the communication path  282 . The atmosphere chamber  278  is a region surrounded by the recessed portion  233  of the case  205  and the sheet member  64 . The communicating path  282  and the atmosphere chamber  278  are connected to each other via a communicating port  297 . That is to say, the communicating port  297  corresponds to a connection port between the communicating path  282  and the atmosphere chamber  278 . 
         [0220]    The communicating path  283  is provided on the downstream side of the atmosphere chamber  278 . The communicating path  283  is a region surrounded by the cutout portion  241  of the case  205  and the sheet member  64 . The atmosphere chamber  278  and the communicating path  283  are connected to each other via a communicating port  298 . That is to say, the communicating port  298  corresponds to a connection port between the atmosphere chamber  278  and the communicating path  283 . 
         [0221]    The atmosphere chamber  279  is provided on the downstream side of the communication path  283 . The atmosphere chamber  279  is a region surrounded by the recessed portion  232  of the case  205  and the sheet member  64 . The communication path  283  and the atmosphere chamber  279  are connected to each other via a communicating port  299 . That is to say, the communicating port  299  corresponds to a connection port between the communicating path  283  and the atmosphere chamber  279 . 
         [0222]    The communicating path  284  is provided on the downstream side of the atmosphere chamber  279 . The communicating path  284  is a region surrounded by the groove portion  238  of the case  205  and the sheet member  64 . The atmosphere chamber  279  and the communicating path  284  are connected to each other via a communicating port  300 . That is to say, the communicating port  300  corresponds to a connection port between the atmosphere chamber  279  and the communicating path  284 . 
         [0223]    The liquid containing portion  69  is provided on the downstream side of the communicating path  284 . The liquid containing portion  69  is a region surrounded by the recessed portion  231  of the case  205  and the sheet member  64 . The communicating path  284  and the liquid containing portion  69  are connected to each other via a connection port  301 . The connection port  301  is a connection port between the communicating path  284  and the liquid containing portion  69 , and is also a connection port between the atmosphere communicating portion  146  and the liquid containing portion  69 . The liquid supply portion  59  is provided on the downstream side of the liquid containing portion  69 . In this embodiment, the flow path  270  extending from the atmosphere opening port  147  to the liquid supply portion  59  has the above configuration. 
         [0224]    Upon ink in the liquid containing portion  69  being supplied to the recording portion  31  ( FIG. 2 ) via the liquid supply portion  59 , the amount of the ink in the liquid containing portion  69  decreases. If the amount of the ink in the liquid containing portion  69  decreases, the air pressure in the liquid containing portion  69  is likely to become lower than the atmospheric pressure. In this embodiment, the atmosphere communicating portion  146  extending from the atmosphere opening port  147  to the communicating path  284  is in communication with the liquid containing portion  69 . For this reason, if the amount of the ink in the liquid containing portion  69  decreases and the air pressure in the liquid containing portion  69  becomes lower than the atmospheric pressure, the atmosphere may be introduced into the liquid containing portion  69  via the atmosphere communicating portion  146 . As a result, the air pressure in the liquid containing portion  69  can be readily maintained at the atmospheric pressure. 
         [0225]    At this time, the atmosphere introduced into the liquid containing portion  69  flows into the atmosphere chamber  271  from the atmosphere opening port  147  via the introduction path  148 . The atmosphere that has flowed into the atmosphere chamber  271  flows into the atmosphere chamber  272  from the communicating port  286  through the communicating port  287  of the communicating portion  268 . The atmosphere that has flowed into the atmosphere chamber  272  flows into the atmosphere chamber  273  through the waterproof air-permeable film  65 . The atmosphere that has flowed into the atmosphere chamber  273  flows into the atmosphere chamber  274  from the communicating port  288  through the communicating port  289  of the communicating portion  267 . The atmosphere that has flowed into the atmosphere chamber  274  flows into the atmosphere chamber  275  from the communicating port  290  through the communicating port  291  of the communicating portion  266 . The atmosphere that has flowed into the atmosphere chamber  275  flows into the atmosphere chamber  276  from the communicating port  292  through the communicating port  293  of the communicating portion  265 . 
         [0226]    The atmosphere that has flowed into the atmosphere chamber  276  flows into the atmosphere chamber  277  from the communicating port  294  through the communicating port  295  of the communicating path  281 . The atmosphere that has flowed into the atmosphere chamber  277  flows into the atmosphere chamber  278  from the communicating port  296  through the communicating port  297  of the communicating path  282 . The atmosphere that has flowed into the atmosphere chamber  278  flows into the atmosphere chamber  279  from the communicating port  298  through the communicating port  299  of the communicating path  283 . The atmosphere that has flowed into the atmosphere chamber  279  flows into the liquid containing portion  69  from the communicating port  300  through the connection port  301  of the communicating path  284 . Embodiment 3 can also achieve the effects similar to Embodiment 1. 
         [0227]    In the tank  9 C, one of the front face  51  and the back face  54  corresponds to a first face, and the other one of the front face  51  and the back face  54  corresponds to a second face. The atmosphere chamber  275  provided in the front face  51  corresponds to one of a first atmosphere chamber and a second atmosphere chamber. The atmosphere chamber  271 , the atmosphere chamber  274 , the atmosphere chamber  276 , the communicating path  281 , the atmosphere chamber  277 , the communicating path  282 , the atmosphere chamber  278 , the communicating path  283 , the atmosphere chamber  279 , and the communicating path  284  that are provided in the back face  54 , correspond to the other one of the first atmosphere chamber and the second atmosphere chamber. The atmosphere chamber  272  provided in the upper face  53 A corresponds to a third atmosphere chamber. 
         [0228]    Note that, in the usage posture of the tank  9 C, the liquid inlet port  138  is oriented in a direction that intersects the Z axis, as illustrated in  FIG. 31 . In  FIG. 31 , various components are simplified for the purpose of schematically illustrating the configuration. In the usage state, the liquid supply portion  59  is located vertically below the liquid inlet port  138 . In the usage posture of the tank  9 C, the connection port  301  between the atmosphere communicating portion  146  and the liquid containing portion  69  is located vertically below the liquid inlet port  138 . In the usage state of the tank  9 C, the connection port  301  is located vertically above the liquid supply portion  59 . With this configuration, in the tank  9 C, the connection port  301  is immersed in ink  302  contained in the liquid containing portion  69 . When the liquid ejection system  1  is used for printing, the liquid inlet portion  36  of the tank  9 C is sealed by the cap  303 . 
         [0229]    With the above configuration, in the usage posture of the tank  9 C, a change in a water load due to a change in the liquid level of the ink  302  in the liquid containing portion  69  can be reduced, compared with a configuration in which the connection port  301  is located vertically above the liquid surface of the ink  302  contained in the liquid containing portion  69 . That is to say, with the tank  9 C, it is possible to reduce a change in the pressure of the ink  302  supplied to the recording portion  31  due to a change in the liquid level of the ink  302  in the liquid containing portion  69 . Thus, it is possible to readily suppress a significant change in the pressure of the ink  302  supplied to the recording head of the recording portion  31  caused by an increase and a decrease in the amount of the ink  302  in the liquid containing portion  69  in the tank  9 C. As a result, a change in performance of ejection of the ink  302  in the recording portion  31  can be readily suppressed, and therefore, print quality can be readily maintained at a favorable level. 
         [0230]    In the above embodiments, the liquid ejection apparatus may be a liquid ejection apparatus that consumes liquid other than ink by ejecting, discharging, or applying the liquid. Note that the status of liquid discharged as a very small amount of droplets from the liquid ejection apparatus includes a granular shape, a tear-drop shape, and a shape having a thread-like trailing end. Furthermore, the liquid mentioned here may be any kind of material that can be consumed by the liquid ejection apparatus. For example, the liquid need only be a material whose substance is in the liquid phase, and includes fluids such as inorganic solvent, organic solvent, solution, liquid resin, and liquid metal (metal melt) in the form of a liquid body having a high or low viscosity, sol, gel water, or the like. Furthermore, the liquid is not limited to being a one-state substance, and also includes particles of a functional material made from solid matter, such as pigment or metal particles, that are dissolved, dispersed, or mixed in a solvent. Representative examples of the liquid include ink such as that described in the above embodiments, liquid crystal, or the like. Here, “ink” encompasses general water-based ink and oil-based ink, as well as various types of liquid compositions such as gel ink and hot melt-ink. Moreover, sublimation transfer ink may be used as the ink. The sublimation transfer ink is ink that includes a sublimating color material, such as subliming dye. As a printing method, such sublimation transfer ink is ejected to a transfer medium by the liquid ejection apparatus, this transfer medium is brought into contact with a material to be printed, and is heated, thereby sublimating the color material and transferring this color material to the material to be printed. The material to be printed is a T-shirt, a smartphone, or the like. Thus, with the ink that includes a sublimating color material, various materials to be printed (print mediums) can be printed. Specific examples of the liquid ejection apparatus include a liquid ejection apparatus that ejects liquid including a material, such as an electrode material or a color material that is used for manufacturing a liquid crystal display, an EL (electro-luminescence) display, a surface emission display, or a color filter, for example, in the form of being dispersed or dissolved. The liquid ejection apparatus may also be a liquid ejection apparatus that ejects biological organic matter used in manufacturing of a biochip, a liquid ejection apparatus that is used as a precision pipette and ejects a liquid serving as a sample, a textile printing apparatus, a microdispenser, or the like. Furthermore, the liquid ejection apparatus may be a liquid ejection apparatus that ejects lubricating oil in a pinpoint manner to a precision machine such as a watch or a camera, or a liquid ejection apparatus that ejects, onto a substrate, transparent resin liquid such as UV-cured resin for forming, for example, a micro-hemispherical lens (optical lens) that is used in an optical communication element or the like. The liquid ejection apparatus may also be a liquid ejection apparatus that ejects acid or alkaline etchant, for example, for etching substrates or the like. 
         [0231]    Note that the invention is not limited to the above embodiments and examples, and can be achieved as various configurations without departing from the gist of the invention. For example, the technical features in the embodiments and examples that correspond to the technical features in the modes described in the summary of the invention may be replaced or combined as appropriate in order to solve a part of, or the entire foregoing problem, or to achieve some or all of the above-described effects. The technical features that do not described as essential in the specification may be deleted as appropriate.