Ink-jet printing apparatus and preliminary discharge control method for the apparatus
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United States of America Patent
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Apr 18, 2006
Issued Date -
N/A
app pub date -
Aug 14, 2003
filing date -
Aug 29, 2002
priority date (Note) -
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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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