Electrophotography – Control of electrophotography process – Of plural processes
Reexamination Certificate
2011-06-14
2011-06-14
Royer, William J (Department: 2852)
Electrophotography
Control of electrophotography process
Of plural processes
C399S049000
Reexamination Certificate
active
07962056
ABSTRACT:
A speed change detection apparatus includes an image carrier for carrying a latent image, and a latent image pattern forming device for forming a latent pattern image on the image carrier. The pattern image includes periodically formed line or dot images. An alternating current conversion type surface potential sensor is provided to detect a potential of the surface of the photoconductive member. The alternating current conversion type surface potential sensor further detects a change in speed of the image carrier by detecting a moiré appearing on the latent image pattern.
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Kato Shinji
Masubuchi Fumihito
Harness & Dickey & Pierce P.L.C.
Ricoh & Company, Ltd.
Royer William J
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