Process cartridge and electrophotographic apparatus using the same

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United States of America Patent

PATENT NO 11366402
APP PUB NO 20210116833A1
SERIAL NO

17070054

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Abstract

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There is provided a process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge including an electrophotographic photosensitive member and a charging member, wherein an outer surface of the charging member is composed of at least a matrix and at least a part of domains, a volume resistivity of the matrix is 1.0×105 times or more of a volume resistivity of the domain, an average value Sd of circle equivalent diameters of the domains observed on the outer surface of the charging member is in a predetermined range, the electrophotographic photosensitive member contains a support, a photosensitive layer, and a protective layer in this order and when a surface roughness of the protective layer is measured, each of a protruding valley portion Rvk, a load length ratio Mr2, and Sd/Rvk is in a predetermined range.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHATOKYO TOKYO METROPOLIS

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishiduka, Yuka Shizuoka, JP 61 879
Kaku, Kenichi Suntou-gun, JP 52 653
Kikuchi, Yuichi Suntou-gun, JP 56 909
Nakamura, Nobuhiro Shizuoka, JP 134 1806
Nishida, Tsutomu Shizuoka, JP 88 905
Okuda, Atsushi Yokohama, JP 74 1437
Shida, Kazuhisa Kawasaki, JP 54 655
Shimozawa, Hideharu Shizuoka, JP 23 184
Watanabe, Hiroyuki Shizuoka, JP 670 6656
Yamauchi, Kazuhiro Suntou-gun, JP 129 2138

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