Printhead chip having actuators with enhanced structural...

Details Printhead chip having actuators with enhanced structural... Printhead chip having actuators with enhanced structural...

2006-05-02

2006-05-02

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S065000

Reexamination Certificate

active

07036912

ABSTRACT:
A printhead chip includes a substrate that defines ink supply conduits. Drive circuitry is positioned on the substrate. Nozzle chamber assemblies are positioned on the substrate. Each nozzle chamber assembly defines a nozzle chamber in fluid communication with a respective ink supply conduit and has an upper portion that defines an ink ejection port in fluid communication with the nozzle chamber and a lower portion that extends from the substrate. The upper portion is reciprocally displaceable with respect to the lower portion so that ink is ejected from the ink ejection port. Elongate actuators are connected between the substrate to be electrically connected to the drive circuitry and respective said upper portions to displace said upper portions to eject ink on receipt of electrical signals from the drive circuitry. Each actuator has at least one longitudinal portion with a substantially U-shaped cross section to enhance structural integrity of the actuator.

REFERENCES:
patent: 4967209 (1990-10-01), Hasegawa et al.
patent: 6027205 (2000-02-01), Herbert
patent: 6299289 (2001-10-01), Silverbrook
patent: 6299290 (2001-10-01), Silverbrook
patent: 6505916 (2003-01-01), Silverbrook
patent: 6767077 (2004-07-01), Silverbrook
patent: 2002/0075347 (2002-06-01), Sharma et al.
patent: 096758 (2001-04-01), None
patent: 2001096758 (2001-04-01), None
patent: WO 99/03680 (1999-01-01), None

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