Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2007-10-30
2007-10-30
Do, An H. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S065000
Reexamination Certificate
active
11520569
ABSTRACT:
A micro-electromechanical ink ejection device for a printer includes a wafer substrate defining an ink inlet channel and incorporating drive circuitry. A nozzle chamber structure is positioned on the wafer substrate and includes a wall that defines a slot extending away from the substrate and a roof that defines a part-circumferential opening into the slot, the nozzle chamber structure defining a nozzle chamber in fluid communication with the ink inlet channel and an ink ejection port through which ink in the nozzle chamber can be ejected. An ink ejection paddle is positioned in the nozzle chamber and is displaceable towards and away from the ink ejection port to eject ink from the ink ejection port. A support extends from the wafer substrate outside the nozzle chamber. An elongate actuator extends from the support and is connected to the drive circuitry to be displaceable on receipt of a signal from the drive circuitry. The actuator is connected to the paddle and is shaped to correspond with the slot and the part circumferential opening.
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Do An H.
Silverbrook Research Pty Ltd
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