Electrophotography – Image formation – Charging
Patent
1996-12-17
1998-03-03
Smith, Matthew S.
Electrophotography
Image formation
Charging
399175, 361225, G03G 1502
Patent
active
057246327
ABSTRACT:
A charging apparatus or an electrophotographic apparatus includes an electrophotographic photosensitive member including a photosensitive layer provided on a conductive supporting member, and a charging member including magnetic particles, disposed to be in contact with the electrophotographic photosensitive member, for charging the electrophotographic photosensitive member when a voltage is applied to the charging member. The layer of the electrophotographic photosensitive member most separated from the conductive supporting member has a volume resistivity between 10.sup.8 .OMEGA..cm and 10.sup.15 .OMEGA..cm, and the magnetic particles have a hygroscopic property such that the ratio H/L of the maximum value H to the minimum value L of the amount of water contained within the particles is at least 1 and less than 4.
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Kagawa, et al., "Contact Charging Characteristics Using Conductive Roller", Japan Hardcopy 1992 Transactions, pp. 287-290 (1992).
Aita Shuichi
Arahira Fumihiro
Hano Yoshifumi
Kukimoto Tsutomu
Mizoe Kiyoshi
Canon Kabushiki Kaisha
Smith Matthew S.
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