Patent ID: 7971968
Filing Date: 2011-07-05
Classification: B41J,Y10T

Abstract:
1. A printhead having a plurality of nozzle arrangements, each arrangement comprising: a substrate defining an ink inlet aperture with a wall portion bounding the ink inlet aperture and a crown portion defining a nozzle opening; a skirt portion depending from the crown portion to form part of a peripheral wall of the nozzle arrangement, the crown and skirt portions being displaceable with respect to the wall portion towards the substrate to alter a volume of a nozzle chamber defined by the wall, crown and skirt portions; and a thermal actuator interconnecting the crown and skirt portions with the substrate, the actuator for displacing the crown and skirt portions, wherein the wall portion and skirt portions are configured to define a fluidic seal to inhibit the egress of ink during such displacement, the substrate further includes a layer of micro-electromechanical drive circuitry for actuating the actuator, and the actuator has a first active beam arranged above a second passive beam, the beams fabricated from a conductive ceramic material with an electrical connection between the active beam and the drive circuitry established via conductive pads.