Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2006-09-12
2006-09-12
Stephens, Juanita D. (Department: 2853)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S062000
Reexamination Certificate
active
07104633
ABSTRACT:
An ink-jet printhead includes a substrate, a doughnut-shaped heater formed on the top surface of the substrate, an ink chamber barrier disposed on the substrate to enclose the heater, an ink chamber defined by the substrate and the ink chamber barrier, and an ink passage extending through the substrate in the perpendicular direction to the surface of the heater. The ink passage includes a narrow passage and a wide passage. The narrow passage communicates with the ink chamber. The ink passage concentrically communicates with an opening formed at the center of the heater and a nozzle. An ink introducing direction for supplying the ink into the ink chamber coincides with an ink ejecting direction for ejecting the ink from the nozzle, and the ink chamber barrier is disposed between the substrate and the nozzle plate.
REFERENCES:
patent: 4809428 (1989-03-01), Aden et al.
patent: 4894664 (1990-01-01), Tsung Pan
patent: 6132032 (2000-10-01), Bryant et al.
patent: 09-048121 (1997-02-01), None
patent: 9048121 (1997-02-01), None
U.S. Appl. No. 10/198,173, filed Jul. 19, 2002, Il Kim et al.
Cho Seo-hyun
Kim Il
Staas & Halsey , LLP
Stephens Juanita D.
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