Detector and roller arrangement for an image forming apparatus
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United States of America Patent
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May 21, 2013
Grant Date -
Aug 25, 2011
app pub date -
Feb 23, 2011
filing date -
Feb 24, 2010
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An image forming apparatus includes an endless intermediate transfer belt rotatably stretched over a plurality of rollers, and a detector to read a pattern on the intermediate transfer belt. One of the rollers includes a first portion disposed opposite an area on the intermediate transfer belt including a pattern passing position, and a second portion not including a pattern passing position. The first portion has a diameter smaller than that of the second portion thereof, and an elastic material is superimposed on the second portion only. The detector is disposed between a second roller disposed upstream of the first roller and a third roller disposed downstream of the first roller, and opposite the intermediate transfer belt.
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