Ink jet printhead having out-of-ink detection using temperature monitoring system
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United States of America Patent
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-
Nov 11, 2003
Grant Date -
N/A
app pub date -
Aug 22, 2002
filing date -
Aug 22, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A thermal ink jet printhead for a printer has a temperature sensor attached thereto for monitoring the operating temperature thereof. A maximum printhead operating temperature is stored in a memory of the printer's control circuitry and, if the printhead temperature sensed by the temperature sensor during a printing operation exceeds the maximum operating temperature stored is the memory, a signal is generated indicating that the printhead has stopped ejecting ink droplets and must be checked for depriming or a depleted ink supply.
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