Inkjet printhead heater chip with asymmetric ink vias

Details Inkjet printhead heater chip with asymmetric ink vias Inkjet printhead heater chip with asymmetric ink vias

2006-03-21

2006-03-21

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S085000

Reexamination Certificate

active

07014299

ABSTRACT:
An inkjet printhead heater chip has an ink via asymmetrically arranged in a reciprocating direction of inkjet printhead movement. The ink via has two sides and a longitudinal extent substantially parallel to a print medium advance direction. A column of fluid firing elements exists exclusively along a single side of the two sides. The heater chip and ink via each have a centroid and neither resides coincidentally with one another. Preferably, the heater chip centroid resides externally to a boundary of the ink via. In other aspects, the column of fluid firing elements can be a sole column or plural and may be centered in the reciprocating direction. The ink via can be a sole via or plural. The heater chip can be rectangular and the ink vias can be closer to either the long or short ends thereof. Inkjet printers for housing the printheads are also disclosed.

REFERENCES:
patent: 5016023 (1991-05-01), Chan et al.
patent: 5030971 (1991-07-01), Drake et al.
patent: 6267468 (2001-07-01), Torgerson et al.

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