Inkjet head inspection device

Details Inkjet head inspection device Inkjet head inspection device

2007-07-03

2007-07-03

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

Reexamination Certificate

active

11063326

ABSTRACT:
An inkjet head inspection device inspects an inkjet head including plural nozzles that eject ink droplets, plural ink reservoirs that contain the ink to be ejected from the plural nozzles, and plural piezoelectric elements that exert pressure on the ink reservoirs to force the ink droplets out of the nozzles. The inkjet head inspection device has a differential amplifier section that amplifies a differential voltage between respective ground-side electrodes or opposite-side electrodes of the piezoelectric elements corresponding to two nozzles to be inspected, when a drive voltage application section applies a drive voltage to each of the piezoelectric elements, and a decision section that decides whether an ink jet malfunction occurs in the two nozzles to be inspected, based on the differential voltage furnished from the differential amplifier section.

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patent: 6831392 (2004-12-01), Nariai
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patent: 11-64175 (1999-03-01), None
patent: 2000-318183 (2000-11-01), None
patent: 2000-355100 (2000-12-01), None
patent: 2004-9501 (2004-01-01), None

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