Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Reexamination Certificate
2006-10-31
2009-08-04
Lee, John R (Department: 2878)
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
C356S617000, C341S013000, C033S0010PT
Reexamination Certificate
active
07569808
ABSTRACT:
A rotary encoder includes a shaft which serves as a rotation axis, a disc supporting plate fixed to the shaft, an encoder disc having a center hole, a first side face, and a second side face opposing the first side face, an elastic member contacting and pressing the second side face of the encoder disc, and a retaining member retaining the second side face of the encoder disc via the elastic member. The first side face is contacted with a surface of the disc supporting plate. The shaft is inserted into the hole. A belt conveyance apparatus includes an endless belt, a roller configured to rotate the endless belt, including a shaft and the rotary encoder. The rotary encoder is provided on the shaft of the roller. An electrophotographic image forming apparatus includes an image forming unit and the belt conveyance apparatus.
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Lee John R
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
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