Harness, Dickey & Pierce, P.L.C.
Charging roller, charging device and image forming apparatus incorporating same, and method of calculating resistance of charging roller
A charging roller to apply voltage to a target to charge the target has a surface having a color set in one of a range according to CIE L*a*b* color space and a range according to CIE XYZ color space, and the range according to CIE L*a*b* color space is defined as 32.6≦L*≦50.9, 0.51≦a*≦1.12, and 6.0≦b*≦8.4; and the range according to CIE XYZ color space is defined as 8.8≦X≦21.0, 9.1≦Y≦21.3, and 5.7≦Z≦11.8.
RICOH COMPANY, LTD.
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inventional inventional
Kazuhiko Takaaki Hisashi Eisuke
Watanabe Tawada Kikuchi Shimizu