Method for judging discharge state of ink jet recording head, and ink jet recording apparatus utilizing the same
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United States of America Patent
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-
Oct 23, 2001
Grant Date -
N/A
app pub date -
Apr 30, 1993
filing date -
May 8, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The temperature characteristics of an ink jet recording head are detected, and the result of detection is utilized for detecting the ink discharge state. Also a statistical processing on the temperature characteristics detected on plural recording heads enables exact detection of the ink discharge state, not effected by the individual difference of the recording heads. Also there is detected the abnormality in ink discharge, that may occur prior to the exhaustion of ink in the ink tank.
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