Patent ID: 7597428
Filing Date: 2009-10-06
Classification: B41J

Abstract:
1. An ink jet head for ejecting ink to record an image on a recording medium, comprising: a pressure chamber partitioned by a side wall shared with adjacent pressure chambers and formed of a piezoelectric material with an electrode on a surface thereof, the pressure chamber having both ends through which ink flows into the pressure chamber; a nozzle configured to eject ink from the pressure chamber therethrough; a first common ink chamber provided at one of the ends of the pressure chamber to supply ink to the pressure chamber; a second common ink chamber provided at the other end of the pressure chamber to take ink from the pressure chamber; an ink channel configured to flow ink from the first common ink chamber to the second common ink chamber; and an ultrasonic transducer for generating an ultrasound to forcibly move ink by a pressure of the ultrasound, the transducer being arranged in the ink channel, wherein ink is forcibly circulated by the ultrasonic pressure through the first common ink chamber, the pressure chamber, the second common ink chamber, and the ink channel.