Patent ID: 6375310
Filing Date: 2002-04-23
Classification: B41J

Abstract:
An ink jet head comprising:a stacked body having a plurality of ink jet head chips stacked one on another at predetermined intervals, wherein each of said ink jet head chips comprises: a plurality of nozzle holes for ejecting ink drops; a plurality of ejection chambers connected to said plurality of nozzle holes, respectively; a plurality of diaphragms each constituting at least one wall of each of said ejection chambers, respectively; and a plurality of driving means for producing transformation in said diaphragms, respectively; and wherein each of said ink jet head chips further comprises a plurality of grooves that are formed in a front end surface on a nozzle hole side or in an opposite side end surface thereof, and act as guides during stacking to substantially align said plurality of ink jet head chips with each other in said stacked body; and wherein each of said ink jet head chips comprises an upper substrate, a middle substrate, and a lower substrate, and said plurality of grooves are formed in said middle substrate.