Electrophotographic apparatus, process cartridge, and cartridge set

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United States of America Patent

PATENT NO 11449000
SERIAL NO

17071246

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Abstract

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An electrophotographic apparatus having an electrophotographic photosensitive member, a charging unit, and a developing unit for forming a toner image, wherein the charging unit has a conductive member disposed to be contactable with the electrophotographic photosensitive member, a conductive layer at the surface of the conductive member has a matrix-domain structure, at least a portion of the domains is exposed at the outer surface of the conductive member, the outer surface of the conductive member is constituted at least of the matrix and these domains, a volume resistivity R1 of the matrix is greater than 1.00×1012 Ω·cm, a volume resistivity R2 of the domains is less than R1, Martens hardness G1 of the matrix and Martens hardness G2 of the domains satisfy a prescribed relationship, and an onset temperature T(A) for a storage elastic modulus E′ of the toner is not more than 80.0° C.

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Patent Owner(s)

Patent OwnerAddress
CANON KABUSHIKI KAISHATOKYO 146-8501

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukudome, Kosuke Tokyo, JP 53 811
Komiya, Yuta Shizuoka, JP 21 47
Kurachi, Masahiro Shizuoka, JP 27 472
Nozaki, Dai Shizuoka, JP 19 84
Unno, Tomohiro Shizuoka, JP 11 47
Uratani, Kozue Shizuoka, JP 38 669
Yamauchi, Kazuhiro Shizuoka, JP 129 2138

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