Image forming apparatus
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United States of America Patent
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Sep 22, 2015
Grant Date -
Sep 11, 2014
app pub date -
Mar 4, 2014
filing date -
Mar 5, 2013
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An image forming apparatus includes an image forming unit configured to form a measurement image on a sheet along a main scanning direction, a fixing unit configured to fix the measurement image onto the sheet, a first calculation unit configured to cause a measuring unit to output a measured value at a predetermined point of measurement on the measurement image, a feeding unit to rotate the sheet 90 degrees and feed the sheet, the sheet to pass through the fixing unit again, and the measuring unit to output measured values at a plurality of points of measurement, and calculate a first correction coefficient from first and second measured values at the point of measurement, a correction unit configured to correct the measured values with the first correction coefficient, and a second calculation unit configured to calculate a second correction coefficient for correcting an unevenness in the main scanning direction.
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Cited Art Landscape
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