B - Operations – Transporting – 41 – J
Patent
B - Operations, Transporting
41
J
B41J 2/045 (2006.01) B41J 2/14 (2006.01)
Patent
CA 2414613
An inkjet printhead has a piezoelectric module including a plate with an integrated ink chamber in flow communication with an integrated ink supply manifold and an integrated ink orifice. The ink chamber includes a main channel that connects the ink supply manifold to the ink orifice, and multiple piezoelectric actuators depending from the main channel and spaced apart by ink subchannels in flow communication with the main channel. The printhead also includes a ground electrode in contact with a first end of each of the actuators, and a cover plate bonded to the piezoelectric plate to seal the chamber and the manifold, the cover plate being in contact with a control electrode and configured to conduct control signals from the control electrode to the actuators. The invention also includes an inkjet printhead with means for piezoelectric actuation capable of both vertical and horizontal deformation in direct communication with means for supplying ink from an ink manifold to an ink ejection orifice, and control means for supplying signal to the piezoelectric actuation means. A method of controlling ink drop volume in an inkjet printhead including the steps of selectively activating one or more piezoelectric actuators in an array of piezoelectric actuators in direct communication with an ink supply to create a pressure wave that propagates through the ink supply and ejects an ink drop the volume of which is dependent on the number of actuators that are activated is also disclosed. An inkjet printer having the inventive printhead is further disclosed.
Finlayson & Singlehurst
Illinois Tool Works Inc.
LandOfFree
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