Patent ID: 8449091

Claim:
An ink cartridge configured to be removably mounted to a recording apparatus comprising an urging member configured to urge the ink cartridge in a removal direction, the ink cartridge comprising: a main body comprising: an ink chamber formed in an interior of the main body and configured to store ink therein, a particular wall having a first end and a second end opposite the first end in a further direction, wherein the further direction is perpendicular to the removal direction; a communication portion positioned at the particular wall and configured to selectively place an interior of the ink chamber and an exterior of the ink chamber into fluid communication; a holding portion positioned opposite the particular wall in an insertion direction, wherein the ink chamber is positioned between the particular wall and the holding portion, and the insertion direction is parallel to and opposite the removal direction; and a bottom wall; a first protrusion extending from the main body in the insertion direction and away from the holding portion; and a second protrusion positioned adjacent to the bottom wall and extending from the main body in the insertion direction and away from the holding portion, wherein a particular end of the second protrusion extends further than a particular end of the first protrusion in the insertion direction, wherein a distance from a rear end of the bottom wall to the particular end of the second protrusion in the insertion direction is less than a distance from a rear end of the holding portion to the particular end of the second protrusion in the insertion direction, and wherein the communication portion is positioned between the first protrusion and the second protrusion in the further direction.