Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2008-07-14
2009-08-04
Do, An H (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S062000
Reexamination Certificate
active
07568789
ABSTRACT:
Provided is a pagewidth printhead with a controller, the printhead having a plurality of micro-electromechanical nozzle arrangements. Each nozzle arrangement includes a multilayered substrate defining an ink inlet passage and walls extending from the substrate. Also included is a nozzle plate supported by the walls to define a nozzle chamber in fluid communication with the ink inlet passage, the nozzle plate having a nozzle rim defining an ejection port in fluid communication with the nozzle chamber. Each arrangement also includes a plurality of heater elements suspended between the walls in the chamber, so that when electrical actuation energy is applied to respective heater elements a vapour bubble is formed in the fluid leading to a pressure increase in the chamber thereby ejecting the fluid via the ejection port. The controller is configured to individually actuate respective heater elements to facilitate weighted ink drop volumes to be ejected from the nozzle arrangement.
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North Angus John
Silverbrook Kia
Do An H
Silverbrook Research Pty Ltd
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