Patent Publication Number: US-10766264-B2

Title: Tank arrangeable in liquid consuming apparatus

Description:
CROSS REFERENCE TO RELATED APPLICATION 
     The present application is a continuation of U.S. patent application Ser. No. 15/988,331, filed May 24, 2018, which further claims priority from Japanese Patent Application No. 2017-108474 filed on May 31, 2017, the disclosures of both of which are incorporated herein by reference in their entirety. 
    
    
     BACKGROUND 
     Field of the Invention 
     The present teaching relates to a tank which is to be arranged in a liquid consuming apparatus and which is configured such that a liquid can be replenished to the tank via a supply port. 
     Description of the Related Art 
     There is known a printer provided with a tank which is configured such that the ink can be supplemented to the tank. In a case that the ink inside the tank is consumed, a user can supplement the ink stored in a bottle to the tank via a supply port of the tank. 
     Generally, the tank of such a printer is provided with a view wall (visible wall or visual confirmation wall). The view wall is a translucent or semi-translucent wall for allowing the user to confirm, from the outside of the tank, an ink remaining amount of the ink stored in the tank. The view wall is formed of a material which has a transparency or translucency to light to such an extent that the inside of the tank is visible from the outside of the tank. 
     In a case that the ink is supplemented to the inside of the tank from the supply port, the supplemented ink makes contact with a liquid surface of the ink stored in the tank, thereby ruffling or generating wave in the ink inside the tank, which in turn leads to such a fear that the ruffled ink (waved ink) might adhere to a location, in the inner surface of the view wall, which is positioned above an actual liquid surface of the ink. This consequently gives rise to such a problem that it is difficult for the user to correctly grasp the liquid surface of the ink stored in the tank. 
     The present teaching has been made in view of the above-described situation, and an object of the present teaching is to provide a structure, in a tank to which a liquid can be supplemented, for making it possible to reduce the reaching of the ruffling of the liquid, generated in the tank when the liquid is supplemented to the tank, to the view wall. 
     SUMMARY 
     According to an aspect of the present teaching, there is provided a tank including: a liquid storing chamber which is configured to store liquid to be consumed in a liquid consuming apparatus; a first wall expanding in a first direction parallel to a horizontal direction and in a direction having a vector component in an up-down direction, the liquid stored in the liquid storing chamber being visible, through the first wall, from outside of the liquid storing chamber; a second wall including a supply port located above the first wall and being configured to supply the liquid to the liquid storing chamber therethrough; a third wall defining a bottom of the liquid storing chamber; and a fourth wall arranged in the liquid storing chamber. A first gap is formed between one of the first and second walls and at least a part of a first end in the first direction, of the fourth wall, which is located closely to the one of the first and second walls; and a second gap is formed between the third wall and at least a part of a second end in the first direction, of the fourth wall, which is located closely to the third wall. 
     In a case that the liquid is supplied to the liquid storing chamber from the supply port, a major portion of the liquid is not located firstly in a space, in the liquid storing chamber, which is sandwiched between the first and fourth walls (hereinafter referred to as a “first space”); rather, the major portion of the liquid is located firstly in a space, in the liquid storing chamber, which is located on the opposite side to the first wall relative to the fourth wall (hereinafter referred to as a “second space”). Then, the liquid enters, into the first space form the second space, via the second gap from a lower side of the first space. 
     In a case that the liquid enters into the second space from the supply port and that the liquid falls on the liquid surface of the liquid already stored in the second space, the liquid surface is waved. In the above-described configuration, since the fourth wall extends toward the third wall, it is possible to reduce, by the fourth wall, the reaching of the wave, generated in the liquid surface when the liquid is supplemented to the ink tank, at the first space. As a result, it is possible to reduce the reaching of the wave of the liquid, generated in the inside of the tank when the liquid is supplemented to the tank, to the first wall. 
     The first gap allows the air to circulate between the first and second spaces. Accordingly, even in such a case that the liquid surface of the liquid supplied to the liquid storing chamber is raised to thereby fill the second gap with the liquid, the liquid can be further supplied to the first space. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIGS. 1A and 1B  are perspective views each depicting the outer appearance of a multi-function peripheral  10 , wherein  FIG. 1A  depicts a state that a cover  70  is at a closed position, and  FIG. 1B  depicts a state that the cover  70  is at an opened position. 
         FIG. 2  is a vertical cross-sectional view schematically depicting the internal structure of a printer unit  11 . 
         FIG. 3  is a plane view depicting the arrangement of a carriage  23  and a platen  42 . 
         FIG. 4  is a front exploded perspective view of a tank set  99 . 
         FIG. 5  is a rear exploded perspective view of the tank set  99 . 
         FIG. 6  is a rear perspective view of an ink tank  100 . 
         FIG. 7  is a left side view of the ink tank  100 . 
         FIG. 8  is a left side view of an ink tank  100  in a modified embodiment. 
         FIG. 9  is a left side view of an ink tank  100  in a modified embodiment. 
         FIG. 10  is a left side view of an ink tank  100  in a modified embodiment. 
         FIG. 11  is a left side view of an ink tank  100  in a modified embodiment. 
         FIG. 12  is a left side view of an ink tank  100  in a modified embodiment. 
     
    
    
     DESCRIPTION OF THE EMBODIMENTS 
     In the following, an embodiment of the present teaching will be explained, with reference to the drawings as appropriate. Note that, however, the embodiment explained below is merely an example of the present teaching; it goes without saying that it is possible, for example, to make any appropriate change(s) in the embodiment of the present teaching without departing from the gist and/or scope of the present teaching. As depicted in  FIG. 1 , a posture in which the multi-function peripheral  10  and an ink tank  100  arranged in the multi-function peripheral  10  are usably installed in a horizontal plane will be referred to as a “usable posture” in the following explanation. An up-down direction  7  is defined with the “usable posture” as the reference. Further, a front-rear direction  8  (an example of a second direction) is defined, with a side on which an opening  13  of the multi-function peripheral  10  is provided is designated as the frontward side (front surface or front side), and a left-right direction  9  (an example of a first direction) is defined as viewing the multi-function peripheral  10  from the frontward side (front surface). In the embodiment, the up-down direction  7  corresponds to the vertical direction, and each of the front-rear direction  8  and the left-right direction  9  corresponds to the horizontal direction in the usable posture. The front-rear direction  8  and the left-right direction  9  are orthogonal to each other. 
     &lt;Overall Configuration of Multi-Function Peripheral  10 &gt; 
     As depicted in  FIGS. 1A and 1B , the multi-function peripheral  10  (an example of a liquid consuming apparatus) is formed to have a substantially rectangular parallelepiped shape. The multi-function peripheral  10  includes, at a lower portion of the multi-function peripheral  10 , a printer unit  11  which records an image onto a paper  12  (sheet  12 , paper sheet  12 ; see  FIG. 2 ) by an ink-jet recording method. The printer unit  11  has a casing  14  including a front wall  14 A and an opening  13  formed in the front wall  14 A. As depicted in  FIG. 2 , a feeding section  15 , a feed tray  20 , a discharge tray  21 , a conveyance roller section  54 , a recording section  24 , a discharge roller section  55 , a platen  42 , and a tank set  99  (see  FIG. 1B ) are arranged in the inside of the casing  14 . Further, the multi-function peripheral  10  has various functions such as a facsimile function, a print function, etc. Note that the state depicted in  FIGS. 1A and 1B  is the usable posture of the multi-function peripheral  10 . 
     &lt;Feed Tray  20 , Discharge Tray  21 &gt; 
     As depicted in  FIGS. 1A and 1B , the feed tray  20  is inserted into or removed from the multi-function peripheral  10  by a user, in the front-rear direction  8  through the opening  13 . The opening  13  is positioned in a location, of the front surface of the multi-function peripheral  10 , which is in the center in the left-right direction  9  of the front surface. The feed tray  20  is capable of supporting a plurality of sheets of the paper  12  that are stacked in the feed tray  20 , as depicted in  FIG. 2 . The discharge tray  21  is arranged at a position at the upper side of (above) the feed tray  20 . The discharge tray  21  supports the paper  12  discharged by the discharge roller section  55 . 
     &lt;Feeding Section  15 &gt; 
     The feeding section  15  feeds the paper  12  supported by the feed tray  20  to a conveyance route  65  (to be described later on). As depicted in  FIG. 2 , the feeding section  15  includes a feeding roller  25 , a feeding arm  26 , and a shaft  27 . The feeding roller  25  is rotatably supported by the feeding arm  26  at a front end thereof. The feeding roller  25  rotates in a direction for causing the paper  12  to be conveyed in a conveyance direction  16  by a driving force applied to the feeding roller  25  from a conveyance motor (not depicted in the drawings). The feeding arm  26  is pivotably supported by the shaft  27  supported by a frame of the printer unit  11 . A bias is applied to the feeding arm  26  by an elastic force of a spring, etc., or by the self-weight of the feeding arm  26  such that the feeding arm  26  is pivoted and urged toward the feed tray  20 . 
     &lt;Conveyance Route  65 &gt; 
     As depicted in  FIG. 2 , the conveyance route  65  is a route or path which extends from a rear-end portion of the feed tray  20  rearwardly toward the rear side of the printer unit  11 . A portion of the conveyance route  65  is defined, in the interior of the printer unit  11 , by an outer guide member  18  and an inner guide member  19  which are arranged to face with each other with a predetermined gap intervened therebetween. The conveyance route  65  makes a U-turn frontwardly while extending from the lower side to the upper side, at the rear side of the printer unit  11 ; and then the conveyance route  65  reaches the discharge tray  21  via a space between the recording section  24  and the platen  42 . As depicted in  FIGS. 2 and 3 , a portion of the conveyance route  65  between the conveyance roller section  54  and the discharge roller section  55  is provided at a substantially central portion in the left-right direction  9  of the multi-function peripheral  10 , and extends in the front-rear direction  8 . In  FIG. 2 , the conveyance direction  16  of the paper  12  in the conveyance route  65  is indicated by an arrow of a dot-dash chain line. 
     &lt;Conveyance Roller Section  54 &gt; 
     As depicted in  FIG. 2 , the conveyance roller section  54  is arranged in the conveyance route  65  at the upstream side of the recording section  24  in the conveyance direction  16  in the conveyance route  65 . The conveyance roller section  54  includes a conveyance roller  60  and a pinch roller  61  which are facing each other. The conveyance roller  60  is driven by the conveyance motor. The pinch roller  61  rotates following the rotation of the conveyance roller  60 . The paper  12  is conveyed in the conveyance direction  16  by being pinched between the conveyance roller  60  and the pinch roller  61  which are rotated normally (positively) by the normal rotation of the conveyance motor. 
     &lt;Discharge Roller Section  55 &gt; 
     As depicted in  FIG. 2 , the discharge roller section  55  is arranged at a location, in the conveyance route  65 , which is on the downstream side of the conveyance roller section  54  in the conveyance direction  16 . The discharge roller section  55  includes a discharge roller  62  and a spur  63  which are facing each other. The discharge roller  62  is driven by the conveyance motor. The spur  63  rotates following the rotation of the discharge roller  62 . The paper  12  is conveyed in the conveyance direction  16  by being pinched between the discharge roller  62  and the spur  63 , with the discharge roller  62  being rotated by a driving force transmitted to the discharge roller  62  from the conveyance motor. 
     &lt;Recording Section  24 &gt; 
     As depicted in  FIG. 2 , the recording section  24  is arranged between the conveyance roller section  54  and the discharge roller section  55  in the conveyance direction  16 . The recording section  24  is arranged to face the platen  42 , while sandwiching the conveyance route  65  therebetween, in the up-down direction  7 . The recording section  24  includes a carriage  23  and a recording head  39 . 
     As depicted in  FIG. 3 , the carriage  23  is supported by guide rails  43  and  44  which are extended respectively in the left-right direction  9 , at positions separated respectively in the front-rear direction  8 . The guide rails  43  and  44  are supported by the frame of the printer unit  11 . The carriage  23  is connected to a known belt mechanism disposed on the guide rail  44 . The belt mechanism is driven by a carriage motor (not depicted in the drawings). The carriage  23  connected to the belt mechanism reciprocates in the left-right direction  9  by being driven by the carriage motor. The moving range of the carriage  23  expands or reaches to locations apart from the conveyance route  65  toward left and right sides, as depicted by a dot-dash chain line of  FIG. 3 . 
     As depicted in  FIG. 3 , an ink tube  32  and a flexible flat cable  33  are extended from the carriage  23 . 
     The ink tube  32  connects each of ink tanks  100  (an example of a tank; see  FIG. 1B ) of the tank set  99  to the recording head  39 . The ink tube  32  supplies an ink (an example of a liquid) stored in each of the ink tanks  100  of (constructing) the tank set  99  to the recording head  39 . More specifically, four ink tubes  32  (which are collectively referred to also as the “ink tube(s)  32 ” in some cases) via which four kinds of inks (black, magenta, cyan and yellow inks) are flowed or distributed respectively are provided corresponding to four ink tanks  100 , respectively, and are connected to the carriage  23  in a bundled form. 
     The flexible flat cable  33  electrically connects the recording head  39  to a control circuit board having a controller (not depicted in the drawings) mounted thereon. The flexible flat cable  33  transmits a control signal outputted from the controller to the recording head  39 . 
     As depicted in  FIG. 2 , the recording head  39  is installed on the carriage  23 . A plurality of nozzles  40  is arranged (formed) in the lower surface of the recording head  39 . End portions (forward end or tip portions) of the nozzles  40  are exposed from the lower surface of the recording head  39  and from the lower surface of the carriage  23  on which the recording head  39  is installed. The recording head  39  jets or discharges the ink as fine ink droplets (minute ink droplets) through the nozzles  40 . In a process of movement of the carriage  23 , the recording head  39  jets the ink droplets toward the paper  12  supported by the platen  42 . Accordingly, an image, etc. is recorded on the paper  12 . Further, by this jetting of the ink droplets, the ink stored in the ink tanks  100  is consumed. 
     &lt;Platen  42 &gt; 
     As depicted in  FIGS. 2 and 3 , the platen  42  is arranged between the conveyance roller section  54  and the discharge roller section  55  in the conveyance direction  16 . The platen  42  is arranged so as to face the recording section  24  in the up-down direction  7  with the conveyance route  65  being interposed therebetween. The platen  42  supports the paper  12 , conveyed by the conveyance roller section  54 , from therebelow. 
     &lt;Cover  70 &gt; 
     As depicted in  FIG. 1B , an opening  22  is formed in a right portion of the front wall  14 A of the casing  14 . A cover  70  is attached to the casing  14  such that the cover  70  covers the opening  22  (see  FIG. 1A ). As depicted in  FIGS. 1A and 1B , the cover  70  is pivotable (rotatable) between a closed position at which the cover  70  covers the opening  22  (the position as depicted in  FIG. 1A ), and an opened position at which the cover  70  is opened to thereby allow the opening  22  to be exposed to the outside of the multi-function peripheral  10  and at which the cover  70  does not cover the opening  22  (the position as depicted in  FIG. 1B ). An opening  97  is formed in the cover  70 . 
     A space expands in a portion, in the inside of the casing  14 , which is located on the rear side (behind) the opening  22 . The tank set  99  is arranged or placed in this space in a stationary manner. In a case that the cover  70  is at the closed position, a part or portion of each of the ink tanks  100  and a part or portion of a holding member  120  (to be described below) are visible from the outside thereof, via the opening  97 . Note that the opening  97  may be covered by a film having translucency or transparency to a light, under a condition that a part or portion of each of the ink tanks  100  and a part or portion of the holding member  120  are visible from the outside. 
     &lt;Tank Set  99 &gt; 
     The tank set  99  is configured to store the inks to be supplied to the recording head  39 . As depicted in  FIGS. 4 and 5 , the tank set  99  is provided with four ink tanks  100  storing inks of different colors, respectively, and a holding member  120 . 
     The holding member  120  is configured to hold the four ink tanks  100  in a state that the ink tanks  100  are arranged in a row along the left-right direction  9 . Note that in  FIGS. 4 and 5 , an ink tank  100 , among the four ink tanks  100 , which is arranged at the right end is capable of storing the ink in a volume greater than that in the remaining three ink tanks  100  included in the four ink tanks  100 . However, in the present teaching, there is no particular limitation in the magnitude relationship among the sizes of the four ink tanks  100 . 
     &lt;Ink Tank  100 &gt; 
     As depicted in  FIGS. 4 to 6 , each of the ink tanks  100  has a shape that is flat, rectangular parallelepiped. The ink tank  100  has, as a whole, such a shape wherein a size along the left-right direction  9  is short, and sizes along the up-down direction  7  and the front-rear direction  8 , respectively, are longer than the size in the left-right direction  9 . Further, the size in the front-rear direction  8  is longer than the size in the up-down direction  7 . Note that in  FIGS. 4 to 6 , although a lateral-surface of the ink tank  100  is open, the opened lateral-surface is sealed by a film (not depicted in the drawings). The opened lateral-surface of the ink tank is sealed, for example, by the film, for example, by welding, adhesion, etc. of the film with respect to the opened lateral-surface. 
     The ink tank  100  is formed of a resin which has a transparency or translucency to light to such an extent that an ink inside an ink chamber  111  (an example of a liquid storing chamber; to be described later on) can be visible from the outside of the ink tank  100 . The ink tank  100  is provided with a front wall  101 , a right wall  103 , a left wall  108 , an upper wall  104 , a lower wall  105  (an example of a third wall), a rear wall  110 , and a partition wall  107 . The ink chamber  111  and an atmosphere communicating channel  170  (to be described later on) are constructed of the front wall  101 , the right wall  103 , the left wall  108 , the upper wall  104 , the lower wall  105 , the rear wall  110  and the partition wall  107 . 
     Note that in the present embodiment, in the ink tank  100  included in the four ink tanks  100  and arranged at the rightmost side, a front portion of a right lateral-surface thereof is constructed of the right wall  103 , and a rear portion of the right lateral-surface and a left lateral-surface thereof are constructed of the film. On the other hand, in each of the remaining three ink tanks  100  included in the four ink tanks  100 , a front portion of a left lateral-surface thereof is constructed of the left wall  108 , and a rear portion of the left lateral-surface and a right lateral-surface thereof are constructed of the film. 
     The right lateral-surface and the left lateral-surface of each of the ink tanks  100  extend rearwardly from both left and right ends, respectively, of the front wall  101 . The right lateral-surface and the left lateral-surface of each of the ink tanks  100  expand in the front-rear direction  8  and the up-down direction  7 . The right lateral-surface of each of the ink tanks  100  constructs a right surface of the ink chamber  111 . The left lateral-surface of each of the ink tanks  100  constructs a left surface of the ink chamber  111 . The right lateral-surface and the left lateral-surface of each of the ink tank  100  are facing each other in the left-right direction  9 . The right lateral-surface and the left lateral-surface of each of the ink tanks  100  are an example of facing lateral-surfaces. 
     The front wall  101  constructs the front surface of the ink chamber  111 . 
     The front wall  101  is constructed of a standing wall  102  (an example of a first wall), and an inclined wall  106  (an example of a second wall). The standing wall  102  expands in the up-down direction  7  and the left-right direction  9 . The inclined wall  106  is a wall which connects an upper end of the standing wall  102  and a front end of the upper wall  104 , and which is formed such that the inclined wall  106  is located above the standing wall  102 . The inclined wall  106  is inclined from the upper end of the standing wall  102  such that the inclined wall  106  is oriented more (progressively) upward as approaching to the rear side with respect to the upper end of the upper wall  102 . Namely, the inclined wall  106  is oriented more upward as separating farther from the standing wall  102 . 
     A front surface  102 A of the standing wall  102  and a front surface  106 A of the inclined wall  106  in each of the ink tanks  100  are exposed to the outside of the multi-function peripheral  10  via the opening  97  of the cover  70  (see  FIG. 1A ) and an opening  81  (see  FIGS. 1A and 1B ) of the holding member  120 . This configuration allows the front surface of each of the ink tanks  100  to be visible (visually confirmable) from a location in front of the multi-function peripheral  10 , and allow the user to visually confirm an ink remaining amount of the ink stored in each of the ink tanks  100 . 
     The rear wall  110  faces the front wall  101  in the front-rear direction  8 . The rear wall  110  constructs the rear surface of the ink chamber  111 . 
     The right wall  103  is a wall extending rearwardly from a right end of the front wall  101 . An upper end of the right wall  103  is connected to a front portion of the upper wall  104 . A lower end of the right wall  103  is connected to a front portion of the lower wall  105 . The right wall  103  constructs the right surface of the ink chamber  111 . 
     The left wall  108  is a wall extending rearwardly from a left end of the front wall  101 . An upper end of the left wall  108  is connected to the front portion of the upper wall  104 . A lower end of the left wall  108  is connected to the front portion of the lower wall  105 . The left wall  108  constructs the left surface of the ink chamber  111 . 
     The upper wall  104  extends rearwardly from an upper end of the front wall  101  (a rear end of the inclined wall  106 ). In the ink tank  100  located on the rightmost side among the four ink tanks  100 , a front portion of the upper wall  104  of the rightmost ink tank  100  is connected to an upper end of the right wall  103 . The upper wall  104  of each of the remaining three ink tanks  100  among the four ink tanks  100  is connected to an upper end of the left wall  108 . The upper wall  104  constructs an upper surface of the ink chamber  111 . 
     The lower wall  105  is a wall which extends rearwardly from a lower end of the front wall  101 . The lower wall  105  is formed to be away from the upper wall  104  to be positioned below the upper wall  104  in the up-down direction  7 . The lower wall  105  constructs a lower surface of the ink chamber  111 . Namely, the lower wall  105  defines the bottom of the ink chamber  111 . 
     The partition wall  107  is provided as a plurality of partition walls  107  which are arranged in a space surrounded by the front wall  101 , the right wall  103 , the upper wall  104 , the lower wall  105  and the rear wall  110 . Namely, the plurality of partition walls  107  are arranged inside the ink chamber  111 . 
     A projection  157  (see  FIGS. 5 and 6 ) projects rearwardly from the rear wall  110 . Namely, the projection  157  (see  FIGS. 5 and 6 ) projects toward the outer side of each of the ink tanks  100 . The projection  157  is formed to be hollow. The internal space of the projection  157  is communicated with the ink chamber  111 . The projection  157  is connected to the ink tube  32  (see  FIG. 3 ) directly or indirectly. With this, the ink entering from the ink chamber  111  into the internal space of the projection  157  is allowed to flow out to the ink tube  32 . 
     The ink tank  100  has an atmosphere communicating channel  170 . The atmosphere communicating channel  170  is a communication channel for communicating the ink chamber  111  with the outside of the ink tank  100 . 
     A supply port  112  via which the ink is supplied to the ink chamber  111  is formed in the inclined wall  106  of the ink tank  100 . The supply port  112  penetrates the inclined wall  106  in a thickness direction thereof, and allows the ink chamber  111  to communicate with the outside of the ink tank  100 . By positioning the cover  70  at the opened position, the inclined wall  106  and the supply port  112  are exposed to the outside of the multi-function peripheral  10  via the opening  22  (see  FIG. 1B ). By arranging the supply port  112  in the inclined wall  106 , the ink can be supplemented easily to the ink chamber  111  from a location obliquely above the ink tank  100  via the supply port  112 . 
     As depicted in  FIG. 7 , in a case that the ink in the inside of the ink chamber  111  of each of the ink tanks  100  is used up (ends), the ink is supplemented (replenished) to the ink chamber  111  by the user from a bottle  270  storing the ink therein. In  FIG. 7 , the bottle  270  is depicted with broken lines. The bottle  270  has a shape which is a substantially cylindrical tube, and includes an inlet port  271 , a tapered part  272  of which diameter is decreased progressively (is tapered) toward the inlet port  271 , and a nozzle part  273  extending from the tapered part  272 . 
     As depicted in  FIG. 4 , the front surface  102 A of the standing wall  102  of the front wall  101  is provided with a first line  146  and a second line  147 . The first line  146  and the second line  147  are scales configured to indicate a reference with respect to an ink amount of the ink stored in the ink chamber  111 . 
     The first line  146  extends in the left-right direction  9 . Under a condition that a maximum amount of the ink storable in the ink chamber  111  is stored in the ink chamber  111  and that the multi-function peripheral  10  is in the usable posture, the position in the up-down direction  7  of the first line  146  is at a height which is same as the liquid surface of the maximum amount of the ink. Namely, the first line  146  is located at a position corresponding to the liquid surface of the ink in a case that the maximum amount of the ink is stored in the ink chamber  111 . In other words, the first line  146  indicates the upper limit of the ink amount storable in the ink chamber  111 . 
     The second line  147  extends in the left-right direction  9 . The second line  147  is located below the first line  146  in the up-down direction  7 . Specifically, under a condition that an amount which is smaller than the maximum amount of the ink is stored in the ink chamber  111  and that the multi-function peripheral  10  is in the usable posture, the position in the up-down direction  7  of the second line  147  is at a height which is same as the liquid surface of the amount of the ink which is smaller than the maximum amount. In the embodiment, the position in the up-down direction  7  of the second line  147  is at a height same as the liquid surface of an amount of the ink, which requires supplement of the ink, is stored in the ink chamber  111  under the condition that the multi-function peripheral  10  is in the usable posture. Namely, the second line  147  is located at a position corresponding to the liquid surface of the ink in a case that the amount of the ink stored in the ink chamber  111  is a minimum storing amount. In other words, the second line  147  indicates the lower limit of the ink amount stored in the ink chamber  111 . 
     As indicated in  FIG. 4 , the inclined wall  106  of the front wall  101  is provided with a rib  148  projecting from the front surface  106 . Note that in the drawings which are different from  FIG. 4  and in which the inclined wall  106  is depicted, the illustration of the rib  148  is omitted. 
     The rib  148  is formed at a position below the supply port  112 . The rib  148  extends substantially in the left-right direction  9  from the vicinity of the right end to the vicinity of the left end of the front surface  106 A. Specifically, the rib  148  is inclined more downward toward the right side from a central portion in the left-right direction  9  of the rib  148  and is inclined more downward toward the left side from the central portion in the left-right direction  9  of the rib  148 . 
     By forming the rib  148  in the front surface  106 A of the inclined wall  106 , even in a case that the ink is poured into the ink chamber  111  via the supply port  112  and that the ink leaks from the supply port  112 , the rib  148  prevents the leaked ink from adhering to a location, in the front surface  102 A of the standing wall  102 , which is below the first line  146 . Further, since the rib  148  is inclined, the ink adhered to the rib  148  from thereabove is guided along the rib  148  to the outside in the left-right direction  9  of the ink tank  100 . With these, since the possibility that the ink might adhere to the standing wall  102  can be lowered, it is possible to achieve an effect of lowering the possibility that the visual confirmation of the ink inside the ink chamber  111  from the outside of the ink tank  100  via the standing wall  102  might be hindered due to any adhered ink. 
     Note that the shape of the rib  148  is not limited to the shape as depicted in  FIG. 4 , under a condition that the above-described effect can be achieved. For example, the rib  148  can be shorter in the left-right direction  9  than that depicted in  FIG. 4 . In such a case, the rib  148  preferably extends from a location on the right side with respect to the first and second lines  146  and  147  up to a location on the left side with respect to the first and second lines  146  and  147 . Alternatively, for example, the rib  148  may extend straight along the left-right direction  9 , may be inclined downward from the left end more toward the right end, or may be inclined downward from the right end more toward the left end. 
     Further, the position of the rib  148  is not limited to the position as depicted in  FIG. 4 , under a condition that the above-described effect can be achieved. For example, the rib  148  may be formed in the standing wall  102 , rather than in the inclined wall  106 , or may be formed over both of the inclined wall  106  and the standing wall  102 . In such a case, the rib  148  is preferably formed at a position above the first line  146 . 
     &lt;Partition Walls  91 ,  92  and  93 &gt; 
     As depicted in  FIGS. 6 and 7 , the plurality of partition walls  107  include a partition wall  91  (an example of a fifth wall), a partition wall  92  (an example of a fourth wall) and a partition wall  93  (an example of a sixth wall). 
     The partition wall  91  faces the standing wall  102  in the front-rear direction  8  with the partition wall  92  being sandwiched between the partition wall  91  and the standing wall  102 . The partition wall  91  is a wall expanding in a direction having a component in the up-down direction  7  and in a direction having a component in the left-right direction  9 . In this embodiment, the partition wall  91  expands in the up-down direction  7  and the left-right direction  9 . 
     The partition wall  92  is located between the front wall  101  and the partition wall  91  in the front-rear direction  8 . The partition wall  92  is a wall expanding in a direction having a component in the up-down direction  7  and in a direction having a component in the left-right direction  9 . 
     In the present embodiment, an upper part of the partition wall  92  is inclined progressively downward toward the rear side (as approaching to the rear side with respect to the standing wall  102 ). Namely, the upper part of the partition wall  92  is inclined more downward as separating farther from the standing wall  102 . The upper part of the partition wall  92  extends parallel to a direction  5  which is orthogonal to a rear surface  106 B of the inclined wall  106 . The upper part of the partition wall  92  expands in the direction  5  and in the left-right direction  9 . A lower part of the partition wall  92  extends downwardly from the lower end of the upper part of the partition wall  92 . The lower part of the partition wall  92  expands in the up-down direction  7  and in the left-right direction  9 . 
     The partition wall  93  is located between the partition wall  92  and the partition wall  91  in the front-rear direction  8 . The partition wall  93  extends in the front-rear direction  8  from the partition wall  92  toward the partition wall  91 . The partition wall  92  is a wall expanding in a direction having a component in the front-rear direction  8  and in a direction having a component in the left-right direction  9 . In the present embodiment, the partition wall  93  expands in the front-rear direction  8  and in the left-right direction  9 . 
     An entire area of the right end of each of the partition walls  91 ,  92  and  93  is connected to the right lateral-surface of the ink tank  100 . An entire area of the left end of each of the partition walls  91 ,  92  and  93  is connected to the left lateral-surface of the ink tank  100 . 
     Note that it is allowable that only a part of the right end of each of the partition walls  91 ,  92  and  93  is connected to the right lateral-surface of the ink tank  100 , and/or that only a part of the left end of each of the partition walls  91 ,  92  and  93  is connected to the left lateral-surface of the ink tank  100 . For example, it is allowable that only upper ends of the partition walls  91  and  92  are connected to the right lateral-surface and the left lateral-surface of the ink tank  100 , and/or that only a front end of the partition wall  93  is connected to the right lateral-surface and the left lateral-surface of the ink tank  100 . Alternatively, it is allowable that the right end of each of the partition walls  91 ,  92  and  93  is not connected to the right lateral-surface of the ink tank  100 , and/or that the left end of each of the partition walls  91 ,  92  and  93  is not connected to the left lateral-surface of the ink tank  100 . 
     The ink chamber  111  is divided into a first chamber  191 , a second chamber  192 , a third chamber  193  and a fourth chamber  194  by the partition wall  91 , the partition wall  92  and the partition wall  93 . 
     A gap  131  is formed (defined) between the upper end of the partition wall  91  and the upper wall  104 . A gap  132  is formed between the lower end of the partition wall  91  and the lower wall  105 . The second chamber  192  and the fourth chamber  194  are communicated with each other by the gap  131 . The third chamber  193  and the fourth chamber  194  are communicated with each other by the gap  132 . 
     A gap  133  (an example of a first gap is formed between the front wall  101  and an upper end  92 A (an example of a first end), in the partition wall  92 , which is located closely to the front wall  101 . The gap  133  is formed over an entire area in the left-right direction  9  of the upper end  92 A. Note that the gap  133  may be formed only in a part in the left-right direction  9  (for example, only in a right end) of the upper end  92 A. 
     The upper end  92 A of the partition wall  92  is located above the first line  146 . Further, the upper end  92 A of the partition wall  92  is located below the supply port  112 . Namely, an upper end part (upper end  92 A and a portion surrounding or in the vicinity of the upper end  92 A) of the partition wall  92 , as a part of the partition wall  92 , is located, in the up-down direction  7 , between the first line  146  and the supply port  112 . 
     The upper end  92 A of the partition wall  92  is located between the supply port  112  and the standing wall  102 , in a direction  6  along the rear surface  106 B of the inclined wall  106 . Namely, the upper end part of the partition wall  92  is located at a position closer to the standing wall  102  than to the supply port  112 . 
     A gap  134  (an example of a second gap) is formed between the lower wall  105  and a lower end  92 B (an example of a second end), in the partition wall  92 , which is located closely to the lower wall  105 . The gap  134  is formed over an entire area in the left-right direction  9  of the lower end  92 B. Note that the gap  134  may be formed only in a part in the left-right direction  9  (for example, only in a right end part) of the lower end  92 B. 
     The lower end  92 B of the partition wall  92  is located below a lower end  102 C of the standing wall  102 . Note that the lower end  92 B of the partition wall  92  may be located above the lower end  102 C of the standing wall  102 . In this case, the lower end  92 B of the partition wall  92  may be located below the second line  147 . Of course, the lower end  92 B of the partition wall  92  may be located above the second line  147 . 
     As depicted in  FIG. 6 , a plurality of grooves  94  are formed in a surface  92 C (an example of a facing surface), of the partition wall  92 , which is oriented toward the second chamber  192  and the third chamber  193 . Here, the supply port  112  is oriented toward the second chamber  192  of the partition wall  92 . Namely, the surface  92 C is oriented toward the second chamber  192 , that is a space, in the ink chamber  111 , to which the supply port  112  faces. 
     Each of the plurality of grooves  94  extends, from the upper end  92 A up to the lower end  92 B of the partition wall  92 , in a direction orthogonal to the left-right direction  9  and along the surface  92 C. The plurality of grooves  94  are formed to be arranged side by side to one another with a spacing distance therebetween in the left-right direction  9 . 
     Note that the number of the grooves  94 , the spacing distance between adjacent grooves  94  which are included in the plurality of grooves  94  and which are adjacent to each other in the left-right direction  9 , a direction in which each of the grooves  94  extends, and the depth of each of the grooves  94  are not limited to or restricted by those as depicted in  FIG. 6 , and may be set as appropriate. Further note that it is not necessarily indispensable that the grooves  94  extend from the upper end  92 A up to the lower end  92 B of the partition wall  92 . Furthermore, the grooves  94  may be present or absent, as appropriate. 
     As depicted in  FIG. 7 , a gap  135  (an example of a third gap) is formed between the partition wall  91  and a rear end  93 A (an example of a third end), in the partition wall  93 , which is arranged closely to the partition wall  91 . The gap  135  is formed over an entire area in the left-right direction  9  of the rear end  93 A. Note that the gap  135  may be formed only in a part in the left-right direction  9  (for example, only in a right end part) of the rear end  93 A. Alternatively, the gap  135  may be omitted. Namely, the partition wall  93  may be connected to the partition wall  91 . 
     As depicted in  FIG. 7 , a gap  136  (an example of a fourth gap) is formed between the partition wall  92  and a front end  93 B (an example of a fourth end), in the partition wall  93 , which is arranged closely to the partition wall  92 . The gap  136  is formed over an entire area in the left-right direction  9  of the front end  93 B. Note that the gap  136  may be formed only in a part in the left-right direction  9  (for example, only in a right end part) of the front end  93 B. Alternatively, the gap  136  may be omitted. Namely, the partition wall  93  may be connected to the partition wall  92 . 
     &lt;Holding Member  120 &gt; 
     As depicted in  FIGS. 4 and 5 , the holding member  120  is configured to hold the four ink tanks  100  from the front side thereof, in a state that the four ink tanks  100  are arranged in a row along the left-right direction  9 , while positioning the ink tanks  100  with respect to the holding member  120 . The holding member  120  is provided with a front wall  71 , a right wall  72 , a left wall  73 , an upper wall  74  and a lower wall  75 . The front wall  71  is constructed of a standing wall  76  and an inclined wall  77 . The standing wall  76  expands in the up-down direction  7  and the left-right direction  9 . The inclined wall  77  is a wall connecting an upper end of the standing wall  76  and a front end of the upper wall  74 . The inclined wall  77  is inclined with respect to the up-down direction  7  and the front-rear direction  8 . 
     The right wall  72  is a wall extending rearwardly from a right end of the front wall  71 . The left wall  73  is a wall extending rearwardly from a left end of the front wall  71 . The upper wall  74  is a wall extending rearwardly from an upper end of the front wall  71  (specifically, from an upper end of the inclined wall  77 ). A right end of the upper wall  74  is connected to an upper end of the right wall  72 . A left end of the upper wall  74  is connected to an upper end of the left wall  73 . The lower wall  75  is a wall extending rearwardly from a lower end of the front wall  71 . A right end of the lower wall  75  is connected to a lower end of the right wall  72 . A left end of the lower wall  75  is connected to a lower end of the left wall  73 . 
     In a state that the four ink tanks  100  are positioned in the left-right direction  9  relative to the holding member  120 , a gap  98  is formed between adjacent ink tanks  100  which are adjacent to each other among the four ink tanks  100 . The holding member  120  covers front parts (front portions) of the ink tanks  100 , in a state that the holding member  120  holds the ink tanks  100 . 
     A plurality of openings  81  are formed in the standing wall  76  of the front wall  71  of the holding member  120 . The respective openings  81  are formed with a spacing distance therebetween in the left-right direction  9 . In the present embodiment, the openings  81  are formed to correspond to the four ink tanks  100 , respectively. The number of the opening  81  is set based on the number of the ink tank  100  held by the holding member  120 . Further, although the shape of each of the openings  81  in the embodiment is rectangular, each of the openings  81  may have a shape different from the rectangular shape. 
     In a state that the holding member  120  holds the respective ink tanks  100 , the standing wall  102  of the front wall  101  of each of the ink tanks  100  can be exposed to the outside of the holding member  120  via one of the openings  81 . Specifically, the front surface  102 A of the standing wall  102  and the first line  146  and the second line  147  which are formed in the front surface  102 A can be exposed to the outside of the holding member  120 . Further, in the state that the holding member  120  holds the respective ink tanks  100  and in the state that the cover  70  is at the closed position, the standing wall  102  of each of the ink tanks  100  can be exposed to the outside of the printer section  11  via one of the openings  81  of the holding member  120  and via the opening  97  (see  FIG. 1A ) of the cover  70 . 
     A plurality of openings  82  are formed in the inclined wall  77  of the front wall  71  of the holding member  120 . The respective openings  82  are formed with a spacing distance therebetween in the left-right direction  9 . In the present embodiment, the openings  82  are formed to correspond to the four ink tanks  100 , respectively. Note that the number of the opening  82  is set based on the number of the ink tank  100  held by the holding member  120 . Further, although the shape of each of the openings  82  in the embodiment is circular, each of the openings  82  may have a shape different from the circular shape. In the state that the holding member  120  holds the respective ink tanks  100 , the supply port  112  of each of the ink tanks  100  can be exposed to the outside of the holding member  120  via one of the openings  82 . 
     Caps  113  are attached to a front portion of the upper wall  74  of the holding member  120 . Each of the caps  113  is formed of an elastically deformable material such as rubber, elastomer, etc. The caps  113  are attached to the holding member  120  by engagement or fitting of cap attachment parts  155  formed in the upper wall  74  with respect to attachment parts  117  formed in the caps  113 , respectively. 
     Each of the caps  113  is capable of sealing the supply port  112  of one of the tanks  100  in a fluid-tight manner in a case that a forward end (tip end) part of each of the caps  113  is fitted into the supply port  112  in a state that the caps  113  are attached to the holding member  120  (see  FIG. 1B ). Further, by separating the forward end of each of the caps  113  from the supply port  112 , the supply port  112  is opened (released). As a result, it is possible to supply the ink into the ink chamber  111  via the supply port  112 . 
     &lt;Supply of Ink to Ink Tank  100 &gt; 
     In a case that the ink is supplied to the ink tank  100 , the bottle  270  is inserted into the supply port  112  such that the nozzle part  273  is located in the second chamber  192 , as depicted in  FIG. 7 . 
     Next, the lateral-surface of the bottle  270  is pushed or pressed by the user, thereby allowing the ink stored in the bottle  270  to be released from the nozzle part  273  into the second chamber  192 . 
     In a case that the ink is released with force from the nozzle  273 , the released ink passes beyond the partition wall  92  and collides against an upper surface  93 C of the partition wall  93 . In this situation, since the ink collides against the upper surface  93 C of the partition wall  93  from a location in front of and obliquely above the upper surface  93 C, a major portion of the collided ink is thereby scattered (flipped) rearwardly and obliquely thereabove. Afterwards, the major portion of the ink collided against the upper surface  93 C ink is moved from the second chamber  192  to the third chamber  193  via the gap  135 , and a remaining portion of the ink collided against the upper surface  93 C is moved from the second chamber  192  to the third chamber  193  via the gap  136 . 
     On the other hand, in a case that the force of the release of the ink from the nozzle part  273  is weak, the released ink collides against the surface  92 C of the partition wall  92 . In this situation, since the force of the release of the ink from the nozzle part  273  is weak, a major portion of the collided ink flows downwardly along the grooves  94  formed in the surface  92 C, without being scattered (flipped). Further, a portion of the collided ink is scatted (flipped). In this situation, since the ink collides against the surface  92 C, of the partition wall  92 , which is inclined rearwardly and obliquely downwardly, from a location above the surface  92 C, the major portion of the collided ink is scatted (flipped) rearwardly. Afterward, the major portion of the ink collided against the surface  92 C is moved from the second chamber  192  to the third chamber  193  via the gap  136 , and a remaining portion of the ink collided against the surface  92 C is moved from the second chamber  192  to the third chamber  193  via the gap  135 . 
     In a case that the ink is continuously supplied from the bottle  270 , the amount of the ink stored in the third chamber  193  becomes great, which in turn raises the liquid surface of the ink to be high. Accordingly, the ink is moved from the third chamber  193  to the fourth chamber  194  via the gap  132 . In addition, the ink is moved from the third chamber  193  to the first chamber  191  via the gap  134 . 
     In a case that the newly supplied ink collides against the liquid surface of the ink stored in the third chamber  193  from thereabove, the ink is ruffled (waved). Further, under a condition that the liquid surface of the ink is located in the second chamber  192  due to the raised liquid surface of the ink and that the newly supplied ink collides against the liquid surface from thereabove, the ink is ruffled (waved). The ruffled ink in the third chamber  193  and in the second chamber  192  is moved in the frontward and rearward directions. The entering of the ink moving frontwardly into the first chamber  191  is lowered by the partition wall  92 ; the entering of the ink moving rearwardly into the fourth chamber  194  is lowered by the partition wall  91 . 
     According to the above-described embodiment, in a case that the ink is supplied to the ink chamber  111  from the supply port  112 , the major portion of the ink entered into the ink chamber  111  from the supply port  112  is not firstly located in the first chamber  191 , in the ink chamber  111 , which is sandwiched between the standing wall  102  and the partition wall  92 ; rather, the major portion of the ink entered into the ink chamber  111  from the supply port  112  is firstly located in the second chamber  192  and in the third chamber  193 , in the ink chamber  111 , each of which is located on the opposite side to the standing wall  102  relative to the partition wall  92 . Then, the ink enters, via the gap  134 , from the third chamber  193  into the first chamber  191  from a lower side of the first chamber  191 . 
     In a case that the ink enters into the second chamber  192  and to the third chamber  193  from the supply port  112  and that the ink falls on the liquid surface of the ink already stored in each of the second and third chambers  192  and  193 , the liquid surface is waved. In the above-described embodiment, since the partition wall  92  extends toward the lower wall  105 , it is possible to reduce, by the partition wall  92 , the reaching of the wave generated in the liquid surface to (at) the first chamber  191 . As a result, it is possible to reduce the reaching of the wave, generated in the inside of the ink tank  100  when the ink is supplemented to the ink tank  100 , to the standing wall  102 . 
     The gap  133  allows the air to circulate between the first chamber  191  and the second chamber  192 . Accordingly, even in such a case that the liquid surface of the ink supplied to the ink chamber  111  is raised to thereby fill the gap  134  with the ink, the ink can be further supplied to the first chamber  191 . 
     Provided that the gap  133  is formed (defined) only at the right end portion of the upper end  92 A of the partition wall  92 , and that the ink tank  100  is placed in such an inclined state that the right end portion of the upper end  92 A is located below the left end portion of the upper end  92 A of the partition wall  92 , there is such a fear that the air might accumulate at the left end portion. In a case that the accumulation of air occurs when the ink is supplied to the ink tank  100 , an amount of the ink stored in the ink chamber  111  is reduced. In the above-described embodiment, since the gap  133  is formed over the entire area in the left-right direction  9  of the upper end  92 A of the partition wall  92 , the accumulation or air can be avoided. 
     According to the above-described embodiment, the gap  134  is located below the standing wall  102 . Accordingly, even if the wave generated in the third chamber  193  enters into the first chamber  191  via the gap  134 , it is possible to reduce the reaching of the wave to (at) the standing wall  102 . 
     According to the above-described embodiment, both the right end and the left end of the partition wall  92  are connected to the right lateral-surface and the left end surface, respectively, of the ink tank  100 . Accordingly, it is possible to suppress the entering of the wave generated in the second chamber  192  and the third chamber  193  into the first chamber  191 . 
     According to the above-described embodiment, the upper end of the partition wall  92  is located at a position between the first line  146  and the supply port  112  in the up-down direction  7 . Further, the upper end of the partition wall  92  is located at a position closer to the standing wall  102  than to the supply port  112 . Accordingly, it is possible to reduce any entering of the ink, supplied to the second chamber  192  from the supply port  112 , into the first chamber  119  from the gap  133 . 
     According to the above-described embodiment, the ink entered into the second chamber  192  from the supply port  112  circulates to the third chamber  193  via the gap  135  arranged at a position apart from the standing wall  102 , and then the ink circulates into the first chamber  191  via the gap  134 . Namely, the wave of the liquid surface of the ink stored in the third chamber  193  is generated at a position apart from the standing wall  102 . With this, the amplitude of the wave becomes small before the wave is advanced closely to the standing wall  102 . As a result, it is possible to reduce any adhesion of the waved ink to a location, in the inner surface of the standing wall  102 , which is positioned above the actual liquid surface of the ink. 
     Provided that the gap  135  is formed only at the right end portion of the rear end  93 A of the partition wall  93 , and that the ink tank  100  is placed in such an inclined state that the right end portion of the rear end  93 A is located below the left end portion of the rear end  93 A of the partition wall  93 , there is such a fear that the air might accumulate at the left end portion. In a case that the accumulation of air occurs when the ink is supplied to the ink tank  100 , an amount of the ink stored in the ink chamber  111  is reduced. In the above-described embodiment, since the gap  135  is formed over the entire area in the left-right direction  9  of the rear end  93 A of the partition wall  93 , the accumulation or air can be avoided. 
     Provided that the gap  136  is not formed, and that the ink tank  100  is placed in such an inclined state that the rear end  93 A of the partition wall  93  is located below the front end  93 B of the partition wall  93 , there is such a fear that the air might accumulate at the front end  93 B of the partition wall  93 . In a case that the accumulation of air occurs when the ink is supplied to the ink tank  100 , an amount of the ink stored in the ink chamber  111  is reduced. In the above-described embodiment, since the gap  136  is formed, the accumulation or air can be avoided. 
     Further, in a case that the force of the ink entering into the second chamber  192  from the supply port  112  is weak, the ink falls onto the partition wall  92  and is guided downwardly along the partition wall  92 . Provided that the gap  136  is not formed, the ink is guided from the partition wall  92  to the partition wall  93 , and is guided downwardly via the gap  135 . On the other hand, since the gap  136  is formed in the above-described embodiment, the ink is guided downwardly via the gap  136 , without being guided to the partition wall  93 . With this, it is possible to quickly guide the ink downwardly. As a result, it is possible to guide the ink quickly to the first chamber  191  via the gap  134 . 
     On the other hand, in a case that the force of the ink entering into the second chamber  192  from the supply port  112  is strong, the ink moves beyond the gap  136 . Provided that the partition wall  93  is not formed, the ink collides against or makes contact with the liquid surface located at a lower portion of the third chamber  193 . With this, the liquid surface is ruffled (wave is generated in the liquid surface). However, in the embodiment, the partition wall  93  is formed. Accordingly, the liquid makes contact with the partition wall  93 , and thus does not makes contact with the liquid surface located below the partition wall  93 . With this, it is possible to reduce the generation of the wave as described above. 
     Provided that the gap  136  is formed only at the right end portion of the front end  93 B of the partition wall  93 , and that the ink tank  100  is placed in such an inclined state that the right portion of the front end  93 B is located below the left end portion of the front end  93 B of the partition wall  93 , there is such a fear that the air might accumulate at the left end portion. In a case that the accumulation of air occurs when the ink is supplied to the ink tank  100 , an amount of the ink stored in the ink chamber  111  is reduced. In the above-described embodiment, since the gap  136  is formed over the entire area in the left-right direction  9  of the front end  93 B of the partition wall  93 , the accumulation or air can be avoided. 
     According to the above-described embodiment, the bottle  270  storing the ink which is to be supplied to the ink tank  100  can be inserted to the supply port  112  obliquely thereabove. In the embodiment, the bottle  270  can be inserted into the supply port  112  more easily than in a configuration wherein the bottle  270  is inserted into the supply port  112  directly thereabove. 
     According to the above-described embodiment, the upper part of the partition wall  92  is oriented more downward as separating farther from the standing wall  102 . Accordingly, it is possible to guide the ink, supplied to the ink chamber  111  from the supply port  112 , downwardly along the partition wall  92 . 
     According to the above-described configuration, it is possible to circulate the ink, supplied to the ink chamber  111  from the supply port  112 , quickly to a location apart from the supply port  112  along the grooves  94  by the capillarity (capillary action). 
     Modified Embodiments 
     In the embodiment, the wall provided with the supply port  112  (the inclined wall  106 ) continues to the standing wall  102 . It is allowable, however, that the wall provided with the supply port  112  does not continue to the standing wall  102 . For example, another wall may be arranged between the wall provided with the supply port  112  and the standing wall  102 . 
     In the embodiment, the plurality of partition walls  107  include the partition wall  91  and the partition wall  93 . However, the presence and absence of the partition walls  91  and  93  is arbitrary.  FIG. 8  depicts an ink tank  100  which is provided with the partition wall  91 , but is not provided with the partition wall  93 . Although not depicted in the drawing, it is allowable that the ink tank  100  is provided with the partition wall  93 , but is not provided with the partition wall  91 , or that the ink tank  100  is not provided with both the partition wall  91  and the partition wall  93 . 
     In the embodiment, as depicted in  FIG. 7 , the upper part of the partition wall  92  is inclined progressively downward toward the rear side, and the lower part of the partition wall  92  extends downwardly from the lower end portion of the upper part of the partition wall  92 . Namely, the partition wall  92  is bent. However, the direction in which the partition wall  92  extends is not limited to or restricted by this. 
     For example, the partition wall  92  may be curved. 
     Alternatively, it is allowable that the partition wall  92  is not bent. For example, as depicted in  FIG. 9 , the entirety of the partition wall  92  may be inclined progressively downward toward the rear side. 
     In  FIGS. 7 and 9 , although the partition wall  92  extends along the direction  5 , it is allowable that the partition wall  92  does not extend along the direction  5 . For example, the partition wall  92  may be inclined in a direction crossing the direction  5 , as depicted in  FIG. 10 . Alternatively, for example, it is allowable that the partition wall  92  extends in the front-rear direction  8  (horizontal direction) crossing the direction  5 , as depicted in  FIG. 11 . 
     The partition wall  92  is preferably arranged such that a reflected virtual column body, of a virtual column body extending in an axial direction  79  of the supply port  112 , with the inner surface of the supply port  112  as a cross-section of the virtual column body, and reflected off the partition wall  92 , does not reach the supply port  112 . An explanation will be given using a light; the partition wall  92  is arranged such that a reflected light (indicated by a dash-dot line in  FIGS. 10 and 11 ) of the light entering from the supply port  112  into the second chamber  192  of the ink chamber  111  along the axial direction of the supply port  112  and reflected off the partition wall  92  does not reach the supply port  112 . Note that it is also allowable that the partition wall  92  is arranged such that the reflected light reaches the supply port  112 , it is preferred that the partition wall  92  is arranged such that the reflected light does not reach the supply port  112 . Note that this dash-dot line corresponds to the lateral-surface of a virtual column body which is extended along the axial direction (the direction  5  in this embodiment), with the inner surface of the supply port  112  as the cross section thereof, and corresponds also to a lateral-surface of the reflected virtual column body reflected off the partition wall  92 . 
     According to the configurations depicted in  FIGS. 10 and 11 , respectively, in a case that the ink entering into the ink chamber  111  via the supply port  112  collides against the partition wall  92 , the collided ink is less likely to be scattered (flipped) such that the ink is led toward the supply port  112 . With this, it is possible to lower any leakage of the ink, entered from the supply port  112  into the second chamber  192 , to the outside of the ink tank  100  via the supply port  112 . 
     In the above-described embodiment, the partition wall  93  extends along the front-rear direction  8 , as depicted in  FIG. 7 . However, the direction in which the partition wall  93  extends is not limited to the front-rear direction  8 . For example, the partition wall  93  may extend such that the partition wall  93  is oriented progressively downward toward the rear side. 
     In the embodiment, only the part of the partition wall  92  (the upper part of the partition wall  92 ) is located between the first line  146  and the supply port  112  in the up-down direction  7 . However, in a case that the partition wall  92  extends along the front-rear direction  8  as depicted in  FIG. 11 , the entirety of the partition wall  92  is located between the first line  146  and the supply port  112  in the up-down direction  7 . 
     In the embodiment, only the upper part of the partition wall  92  is located between the supply port  112  and the standing wall  102  in the direction  6 . However, in a case that the entirety of the partition wall  92  extends along the direction  5  as depicted in  FIG. 9 , the entirety of the partition wall  92  is located between the supply port  112  and the standing wall  102  in the direction  6 . 
     In the embodiment, the inclined wall  106  is formed between the standing wall  102  and the upper wall  104 . However, it is allowable that the ink tank  100  is not provided with the inclined wall  106 . For example, as depicted in  FIG. 12 , it is allowable that the upper end of the standing wall  102  and the front end of the upper wall  104  are connected to each other, and that the supply port  112  is formed in the upper wall  104 . In such a case, the upper wall  104  is an example of the second wall. 
     In the embodiment, the entirety of the ink tank  100  is formed of the resin which has the transparency or translucency to light to such an extent that the ink inside the ink chamber  111  can be visible from the outside of the ink tank  100 . It is allowable, however, that in the walls constructing the ink tank  100 , the walls different from the standing wall  102  of the front wall  101  may be formed of a member which is different from the resin having the above-described the transparency or translucency to light. 
     In the embodiment, although the tank set  99  is provided with the holding member  120 , it is allowable that the tank set  99  is not provided with the holding member  120 . In such a case, the four ink tanks  100  are not integrally held (handled) by the holding member  120 , and each of the four ink tanks  100  are individually arranged stationarily in the casing  14 . 
     In the embodiment, the ink is explained as an example of the liquid. However, the present teaching is not limited to this. Namely, instead of being an ink, the liquid may be exemplified by a pre-treatment liquid which is to be jetted (discharged) to a recording sheet (recording paper or recording paper sheet) before the ink is jetted (discharged) during the printing; or the liquid may be exemplified by water, etc., which is to be sprayed in the vicinity of the nozzles  40  of the recording head  39  for the purpose of preventing drying of the nozzles  40  of the recording head  39 , and the like.