Patent ID: 7722178
Filing Date: 2010-05-25
Classification: B41J

Abstract:
1. An ink-jet head comprising: a passage unit that is made up of a plurality of plate members laminated with each other, and includes a plurality of individual ink passages each including a pressure chamber and extending to an ink ejection port from which ink is ejected, an ink ejection face formed with a plurality of the ink ejection ports, and a support face formed with an inflow opening through which ink flows in and facing in a direction opposite to a facing direction of the ink ejection face; a filter film that is attached to the support face so as to cover the inflow opening, to thereby filter ink that passes through the inflow opening; a piezoelectric actuator that is attached to the support face and applies ejection energy to ink contained in the pressure chambers; a wire member formed with a plurality of wires that are electrically connected to the piezoelectric actuator and supply an ejection signal to the piezoelectric actuator; and an ink supply block that is made up of a plurality of plate members laminated with each other, and includes a bond face and an ink inlet face, the bond face being formed with an outflow opening through which ink flows out and being bonded to the filter film in such a manner that the inflow opening and the outflow opening are connected through the filter film, the ink inlet face being formed with an inlet hole into which ink is injected and facing in a direction opposite to a facing direction of the bond face, wherein: the passage unit is provided with a through hole that extends in a direction perpendicular to the ink ejection face to connect the ink ejection face and the support face; the ink supply block is provided with a through hole that extends in the direction perpendicular to the ink ejection face to connect the bond face and the ink inlet face; and the filter film blocks communication between the through hole provided in the passage unit and the through hole provided in the ink supply block.