Recording apparatus having abnormality determination based on temperature and average ejection duty cycle
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United States of America Patent
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Jan 14, 2003
Issued Date -
N/A
app pub date -
Jun 6, 2002
filing date -
Jul 26, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A recording apparatus and method of controlling the apparatus includes a recording head for ejecting liquid ink for recording by heat energization, a temperature change rate detecting device for detecting the temperature change rate of the recording head in a normal state, a storage device for storing the temperature change rate information, a determining device for determining the average ejection duty cycle from recording data, an obtaining device for obtaining information relating the temperature change rate in the normal state to the average ejection duty cycle, and a discriminating device for discriminating an abnormality of the recording head determined by the information relating the temperature change rate in the normal state to the average ejection duty cycle, and the temperature change rate detected by the temperature change rate detecting device.
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