Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2011-07-05
2011-07-05
Stephens, Juanita D (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S065000
Reexamination Certificate
active
07971968
ABSTRACT:
A printhead has a plurality of nozzle arrangements. Each arrangement includes 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 assembly, 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. 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. 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.
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Silverbrook Research Pty Ltd
Stephens Juanita D
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