Ink jet with residual ink detection that compensates for different ink properties
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United States of America Patent
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Nov 10, 1992
Issued Date -
N/A
app pub date -
Aug 7, 1991
filing date -
Jan 28, 1989
priority date (Note) -
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Abstract
An ink jet recording apparatus comprises an ink jet head having an ink path communicating with a discharge opening for discharging ink; electrodes arranged in said ink path; a residual ink quantity detection means for detecting residual ink quantity in said ink path in accordance with a resistance value, current value or voltage value from said electrodes; and a correction means for correcting said resistance value, current value or voltage value in accordance with the difference in a resistance of the ink. This enables the correction means to compensate for different ink resistances and thus provide accurate residual ink detection even when different inks are used or ink resistance changes because of a change in ambient conditions.
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