Electrophotography – Control of electrophotography process – Of plural processes
Reexamination Certificate
2007-07-17
2007-07-17
Gray, David M. (Department: 2852)
Electrophotography
Control of electrophotography process
Of plural processes
C399S074000, C399S301000, C347S116000
Reexamination Certificate
active
10917471
ABSTRACT:
An image detector has an I/V converter for converting, into a voltage output., a current output as a result of a photoelectric element arranged in a traveling direction of an intermediate transfer belt having received light reflected from the intermediate transfer belt and light reflected from toner images formed on the intermediate transfer belt; a peak-hold unit for holding an output voltage into which the light reflected from the intermediate transfer belt has been converted by the I/V converter; and a computation unit for detecting a difference between the output voltage of the peak-hold unit and an output voltage into which the light reflected from the toner images of respective colors has been converted by the I/V converter.
REFERENCES:
patent: 6701117 (2004-03-01), Kaji
patent: 2004/0141765 (2004-07-01), Shimura et al.
patent: 2004/0208661 (2004-10-01), Kitagawa et al.
patent: 2005/0163519 (2005-07-01), Takahashi
patent: 2005/0232648 (2005-10-01), Nishizawa et al.
patent: 2761287 (1998-03-01), None
patent: 3068865 (2000-05-01), None
Akatsu Shinichi
Sakamoto Junshin
Gray David M.
McGinn IP Law Group PLLC
Ricoh Printing Systems Ltd.
Wong Joseph S.
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