Patent ID: 7226154

Claim:
An ink cartridge detachably mountable on an ink jet recording apparatus having a print head, comprising: a housing containing ink therein and comprising a top wall, a bottom wall, a first wall facing frontward with respect to a cartridge insertion direction and perpendicular to said top wall, a second wall arranged generally parallel to the cartridge insertion direction and intersecting said top wall and said first wall; an ink supply section disposed on said first wall for supplying ink in said housing to the print head; a projection formed on said second wall which is engageable with the recording apparatus, said projection being formed at a position such that said projection is biased by a part of the recording apparatus when the ink cartridge is mounted in the recording apparatus; and a connection electrode electrically connecting to an information storing unit for storing information electrically, said connection electrode being disposed at a position close to said second wall on which said projection is formed, at least a portion of said connection electrode being disposed in a plane that lies between the top wall and the bottom wall.