Ink-jet recording apparatus

Details Ink-jet recording apparatus Ink-jet recording apparatus

2007-07-30

2008-11-18

Nguyen, Thinh H (Department: 2861)

Incremental printing of symbolic information

Ink jet

Controller

C347S019000

Reexamination Certificate

active

07452045

ABSTRACT:
A waveform signal output circuit selectively outputs, to an ejection energy applier, either one of a first waveform signal so as to make an ink droplet ejected from a nozzle and a second waveform signal so as not to make an ink droplet ejected from the nozzle. A continuous non-ejection counter counts a continuous non-ejection number. A ejection history memory stores therein an ejection history. A non-ejection frequency detector detects a non-ejection frequency. A thickening degree determiner determines a thickening degree of ink in the nozzle. A waveform signal selector makes the waveform signal output circuit output the second waveform signal to the ejection energy applier when an ink droplet is not ejected in the current printing cycle and in addition a thickening degree is equal to or greater than a predetermined value.

REFERENCES:
patent: 6471352 (2002-10-01), Akahira
patent: 6698862 (2004-03-01), Choi et al.
patent: 2002036568 (2002-02-01), None
patent: 2003-127370 (2003-05-01), None
patent: 2003-182056 (2003-07-01), None
patent: 2006-035568 (2006-02-01), None
Japanese Patent Office, Notice of Reasons for Rejection for corresponding Japanese Patent Application No. 2006-214891, mailed Sep. 2, 2008.
Japanese Patent Office, Notice of Reasons for Rejection for corresponding Japanese Patent Application No. 2006-211754, mailed Jul. 29, 2008.

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