Fitzpatrick, Cella, Harper & Scinto
Recovery technique for ink jet recording apparatus
 A recovery method of an ink jet apparatus includes the steps of discharging ink for recovery from a plurality of discharge openings prior to recording, detecting a discharge condition for each discharge opening, and selectively discharging ink for recovery from the discharge openings detected to be unsatisfactory. 
Canon Kabushiki Kaisha
B B B B
B41J B41J B41J B41J
inventional inventional additional inventional
Ken Makoto Kosuke Hidejiro Haruhiko Toshiyuki Masafumi
Tsuchii Takamiya Yamamoto Kadowaki Takahashi Yanaka Wataya