Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2006-10-20
2008-12-09
Stephens, Juanita D (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S056000
Reexamination Certificate
active
07461923
ABSTRACT:
An inkjet printhead includes a substrate defining a plurality of ink supply channels. CMOS micro-processing drive circuitry is positioned on the substrate and includes a pair of aligned metal contact layers. A layer of ink passivation material is positioned over the drive circuitry and defines openings to permit electrical contact with the contact layers. A plurality of nozzle arrangements is positioned on the substrate. Each nozzle arrangement includes a nozzle chamber assembly that defines an ink ejection port and a nozzle chamber in fluid communication with the ink ejection port and a respective ink supply channel. A dynamic structure of the assembly is displaceable with respect to a static structure to reduce and subsequently enlarge a volume of the nozzle chamber so that ink is ejected from the ink ejection port. An elongate actuator is connected to the dynamic structure at one end and is fast with the substrate at another end to be connected to the metal contact layers. The actuator is configured to displace the dynamic structure on receipt of an electrical signal from the contact layers.
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Silverbrook Research Pty Ltd
Stephens Juanita D
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