Patent ID: 6299288
Filing Date: 2001-10-09
Classification: B41J

Abstract:
An ink jet print head apparatus comprising:a print head manifold having a top surface, said top surface containing at least one ink capillary opening for the delivery of ink to a substrate;an orifice plate member formed of a piezoelectric material, said orifice plate member having an orifice formed therethrough;a voltage control mechanism in electronic communication with said orifice plate member for controlling the dimensions of said orifice through piezoelectric displacement; andwherein said orifice plate member is disposed with respect to the top surface of said print head manifold such that the orifice is in communication with said ink capillary opening in said print head manifold, and wherein the application of voltage to said orifice plate member causes the dimensions of said orifice to decrease and wherein said orifice plate member is configured such that the orifice thereof is always open.