Method of detecting position of printing medium performed in printing apparatus
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United States of America Patent
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May 11, 2010
Grant Date -
Jan 11, 2007
app pub date -
Mar 29, 2006
filing date -
Mar 29, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
An optical sensor is transported to a position above a marker on a tray, where it irradiates the marker and measures the reflected light so as to obtain a reference value. A threshold value is determined based on the reference value. The optical sensor is transported above the tray, while emitting light and measuring reflected light. The measured amount is compared with the threshold value. A marker position is identified based on the comparison and the threshold value. A start print position is based on the marker position.
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