Patent ID: 8579420

Claim:
An ink-jet apparatus comprising: an ink supply channel configured to enable ink to flow therethrough; an ink chamber configured to communicate with the ink supply channel via an ink inlet channel and hold the ink supplied from the ink supply channel, the ink chamber having a nozzle operable to discharge the ink; an ink evacuation channel disposed apart from the nozzle, configured to communicate with the ink chamber via an ink outlet channel, and through which the ink held in the ink chamber is evacuated; an ink circulating section configured to apply pressure to the ink so that the ink flows into the ink evacuation channel from the ink supply channel via the ink chamber; a first actuator disposed on a wall of the ink chamber facing the nozzle across the ink chamber, the first actuator being operable to vibrate the wall of the ink chamber; wherein, when a smallest cross-sectional area of the ink inlet channel is represented as S 1 , a smallest cross-sectional area of the ink outlet channel is represented as S 2 , and a cross-sectional area of the ink chamber which is perpendicular to a discharge direction of the ink is represented as S 3 , a relationship of S 3 >S 1 >S 2 is satisfied, and a second actuator operable to change the smallest cross-sectional area S 2 of the ink outlet channel.