Patent ID: 7222949

Claim:
A liquid cartridge comprising: a liquid accommodating chamber for containing a liquid; a hollow part having a liquid supplying opening, into which a liquid supplying needle of a liquid ejecting apparatus is inserted, while said liquid supplying opening communicating with said liquid accommodating chamber; a seal member contained in said hollow part, said seal member having an insertion opening being in elastic contact with an external circumference of said liquid supplying needle, while said liquid supplying needle is inserted to said insertion opening; a supply valve contained in said hollow part, said supply valve arranged in order to close or open said insertion opening of said seal member; and an urging member for urging said supply valve toward said seal member, wherein said supply valve comprises: a body part having a circular cross-section, and a diameter that is substantially uniform, of which the diameter is substantially the same as a diameter of said hollow part of said liquid supplying part, and having a cylindrical shape, of which a length in a sliding direction is greater than said diameter of said hollow part of said liquid supplying part, the body part being shaped so that the body part can pass through the insertion opening of the seal and then be urged by said urging member to close the insertion opening; a taper part formed at a first end of said body part, said taper part having an end engaged with said urging member; and a bottom face formed at a second end of said body part, said bottom face having a flat surface being in contact with said seal member when the body part closes the insertion opening.