Patent ID: 6188416
Filing Date: 2001-02-13
Classification: B41J

Abstract:
An ink jet printhead comprising:a body section formed from a piezoelectric material having a first side and a second side, an actuating means disposed on said first side and second side, a first piezoelectric sheet disposed on said actuating means on said first side and a second piezoelectric sheet disposed on said actuating means on said second side wherein the first piezoelectric sheet is positioned at a top side and the second piezoelectric sheet is positioned at a bottom side of said body section;the first piezoelectric sheet of the body section comprises a series of laterally spaced generally parallel driving channels extending into said body section;the second piezoelectric sheet of said body section comprises a series of generally parallel driving channels extending into said body section, said bottom series of driving channels being laterally displaced with respect to said top series of driving channels;a plate member mounted on said body section, said plate member having a plurality of laterally spaced orifices extending therethrough;a plurality of fluid channels defined between said plate member and said body section, each fluid channel being in fluid communication with a corresponding one of said orifices and a corresponding one of said driving channels; andmeans for selectively generating an electric field and applying a pressure pulse to selected ones of said driving channels, whereby fluid in the fluid channel corresponding to the selected driving channel is ejected through the orifice in fluid communication with said fluid channel.