Electrophotography – Control of electrophotography process – Of plural processes
Reexamination Certificate
2007-12-04
2007-12-04
Gray, David M. (Department: 2852)
Electrophotography
Control of electrophotography process
Of plural processes
C399S053000, C399S055000, C399S072000
Reexamination Certificate
active
11475198
ABSTRACT:
An amount of toner transfer on a reference pattern is calculated by using an optical detecting unit that detects both regular reflection light and diffuse reflection light from a detection target simultaneously, based on a relative ratio between a value obtained by subtracting a result of multiplying a “diffuse reflection output” by a “minimum value of a ratio between a regular reflection output and the diffuse reflection output” from the “regular reflection output” of the density detection reference pattern, and a value obtained by subtracting a result of multiplying the “diffuse reflection output” by a “minimum value of a ratio between the regular reflection output and the diffuse reflection output” from the “regular reflection output” in the background of a transfer belt or an intermediate transfer body.
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Gray David M.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Ricoh & Company, Ltd.
Roth Laura K
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