Ink-jet printing apparatus and preliminary discharge control...

Details Ink-jet printing apparatus and preliminary discharge control... Ink-jet printing apparatus and preliminary discharge control...

2006-04-18

2006-04-18

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S035000

Reexamination Certificate

active

07029092

ABSTRACT:
In an ink-jet printing apparatus which includes a plurality of printing heads, each having an array of ink discharging elements, preliminary discharge of driving the elements of at least one printing head is performed a predetermined number of times. The printing head for which the preliminary discharge is to be performed is switched in a predetermined cycle. In performing the preliminary discharge, switching of the printing head is so controlled as to perform preliminary discharge a desired number of times for all the elements of the printing heads by repeating the cycle.

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U.S. Appl. No. 10/648,300 (Yazawa et al.), filed Aug. 27, 2003.

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