Ink amount detecting device and recording apparatus provided with such a device
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United States of America Patent
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-
Jan 11, 2000
Issued Date -
N/A
app pub date -
Apr 7, 1997
filing date -
Jun 3, 1992
priority date (Note) -
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status (Latency Note)
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Abstract
An ink detecting device capable of detecting the amount of ink in an ink tank uses a light emitting device to shine light toward a transparent member in a wall of the ink tank. The ink tank is used in a recording apparatus and is moved relative to a recording medium as a recording head ejects ink onto the recording medium A light receiving member receives light reflected on an inner surface of the transparent member when ink is not in contact with that surface. However, if ink is in contact with the inner surface, no light is reflected to the light receiving member. Thus, a reliable indication of the presence of ink in a movable ink tank, or plural movable ink tanks, can be obtained in the absence of physical contact therewith.
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