Method of testing a droplet discharge device

Details Method of testing a droplet discharge device Method of testing a droplet discharge device

2006-03-22

2008-08-05

Nguyen, Lamson D. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

Reexamination Certificate

active

07407255

ABSTRACT:
A test sheet is set in a droplet discharge device at a first distance. At least one droplet is discharged toward the test sheet from a nozzle formed in the droplet discharge device to form at least one first dot on the test sheet. The test sheet is set in the droplet discharge device at a second distance differing from the first distance. At least one droplet is discharged toward the test sheet from the nozzle to form at least one second dot on the test sheet. A nozzle position error or a nozzle discharge angle error are calculated from the position of the first dot, the position of the second dot, the first distance, and the second distance. Testing inkjet heads in this manner allows accurate testing for errors in nozzle position or discharge angle.

REFERENCES:
patent: 6783201 (2004-08-01), Ninomiya
patent: 2005/0083364 (2005-04-01), Billow
patent: 2000062158 (2000-02-01), None

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