Ink printhead nozzle arrangement with volumetric reduction...

Details Ink printhead nozzle arrangement with volumetric reduction... Ink printhead nozzle arrangement with volumetric reduction...

2008-03-25

2008-03-25

Do, An H. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S065000

Reexamination Certificate

active

11655987

ABSTRACT:
An ink jet printhead nozzle arrangement includes a wafer substrate that defines side walls and an inlet opening of an ink chamber. Drive circuitry is arranged on the wafer substrate A. roof wall assembly defines a roof of the ink chamber and an ink ejection port in fluid communication with the ink chamber. The roof wall assembly includes a nozzle rim supported in general alignment with the inlet opening. A series of radially positioned actuators are each connected to the substrate to receive electrical drive signals, with free ends of the actuators terminating proximate the nozzle rim. The actuators are configured so that, on receipt of an electrical signal from the drive circuitry, said free ends of the actuators are displaced into the ink chamber to reduce a volume of the ink chamber and to eject ink from the ink ejection port.

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