Image reading apparatus
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United States of America Patent
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Oct 13, 2009
Grant Date -
Jan 25, 2007
app pub date -
Jul 17, 2006
filing date -
Jul 19, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides an image reading apparatus which controls conveyance of an original in accordance with the temperature of a conveyance roller for conveying the original, and which performs appropriate conveyance by determining the presence of an abnormality in a temperature detection operation. A copying apparatus uses a temperature detection sensor to detect the temperature of an outlet conveyance roller for conveying an original, which is driven to rotate by a stepping motor, and adjusts the speed at which the original is conveyed by the outlet conveyance roller to a predetermined basic conveyance speed by controlling the rotation of the stepping motor on the basis of a detection signal of the temperature detection sensor. Further, the presence of an abnormality in the detection signal of the temperature detection sensor is determined, and if an abnormality is present, conveyance speed adjustment is halted.
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