Patent ID: 6942326

Claim:
An ink tank comprising: ink holding means capable of impregnating and retaining ink; and a housing for containing said ink holding means, said housing being provided with an ink supply port for supplying ink impregnated in said ink holding means to the outside and an air inducing port for inducing an atmospheric air into said housing, wherein said ink holding means comprises a first ink holding member arranged on the inner face of said housing where said ink supply port is open, and a second ink holding member held closely to said first ink holding member, having smaller ink holding power than that of said first ink holding member, said first ink holding member is substantially the same shape as the shape of the inner face of said housing where said ink supply port is open, and substantially covers the said inner face entirely, and grooves communicated with said ink supply port on the inner face of said housing where said ink supply port is open.