Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2007-04-24
2007-04-24
Stephens, Juanita D. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S064000
Reexamination Certificate
active
11524901
ABSTRACT:
A nozzle arrangement for an inkjet printhead includes a wafer substrate defining an ink passage and incorporating drive circuitry. A passivation layer is operatively positioned on the substrate and defines a first aperture of lesser cross sectional area than the ink passage and which is in fluid communication with the ink passage. A nozzle chamber wall extends from the passivation layer. A nozzle chamber roof is positioned on the nozzle chamber wall so as to define a nozzle chamber that is in fluid communication with the first aperture. The roof defines an ejection port that is in fluid communication with the nozzle chamber and the wall defines a second aperture. An actuator is anchored to the passivation layer, extends through the second aperture and terminates in a paddle. The actuator is connected to the drive circuitry and is configured so that, upon receipt of a drive signal from the drive circuitry, the actuator displaces the paddle to eject ink through the ejection port.
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Silverbrook Research Pty Ltd
Stephens Juanita D.
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