Patent ID: 6851795

Claim:
A cartridge detachably mountable on holding means of an ink jet recording apparatus so as to be freely reciprocatable to scan across a recording medium for recording on the recording medium by discharging ink thereto, said cartridge being defined by a cartridge main body, said cartridge main body having a lower face which faces the recording medium when said cartridge is mounted on the holding means, a front face, and a rear face opposite to said front face, wherein said lower face is provided with a recording head for discharging ink from plural nozzles formed in parallel on the lower face, wherein said front face is provided with an electrical connection portion having at least one cartridge electrode electrically connectable with a corresponding electrode on said holding means, and wherein said rear face is provided with an ink connection portion connectable to corresponding supply means for supplying ink from a main tank installed elsewhere on said ink jet recording apparatus to said recording head said cartridge further comprising: a first pressure portion to receive a first pressure for fixing the holding means by division of the first pressure into a frontward depression in a direction toward the front face for positioning in said front face, and a downward depression for positioning in a direction of said lower face; and a second pressure portion to receive a second pressure for assisting said frontward depression, wherein said first pressure portion has an inclined face to said front face, and said second pressure portion has a face substantially in parallel to said front face, and wherein said cartridge receives a reaction force in the direction of said front face direction, said reaction force and said frontward depression being substantially in the same direction.