Inkjet printhead having reverse ink flow prevention

Details Inkjet printhead having reverse ink flow prevention Inkjet printhead having reverse ink flow prevention

2006-01-11

2009-02-03

Stephens, Juanita D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S065000

Reexamination Certificate

active

07484832

ABSTRACT:
An inkjet printhead is provided comprising a plurality of ink chambers on a first surface of a substrate, each ink chamber having an ink ejection nozzle, a heater arranged in each ink chamber so as to heat ink within the ink chamber to form a gas bubble therein and thereby cause ejection of an ink drop from the associated nozzle and a plurality of ink supply passages formed in the substrate from an opposite, second surface of the substrate so that each ink supply passage supplies ink to an associated one of the ink chambers. A length of the passages through the substrate from the second surface to the associated ink chambers is configured to prevent reverse ink flow into the passages after ink ejection.

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