Patent ID: 6905202
Filing Date: 2005-06-14
Classification: B41J

Abstract:
1. An ink-jet head comprising: a pressure chamber part in which a pressure chamber charged with an ink is formed; a nozzle plate in which a nozzle for discharging said ink is formed; an ink passage part disposed between said pressure chamber part and said nozzle plate in which an ink supplying passage communicated with said pressure chamber for supplying said ink to said pressure chamber and an ink discharging passage for communicating said pressure chamber with said nozzle are respectively formed; an actuator, stacked on said pressure chamber part, for applying a pressure to said pressure chamber for discharging said ink charged in said pressure chamber from said nozzle; an air chamber provided in said ink passage part in a position opposing said ink supplying passage; a damper wall with flexibility for separating said ink supplying passage from said air chamber; and a communicating hole for communicating said air chamber with the atmospheric air, said communicating hole extends along a nozzle column and is opened on a side face of said ink passage part.