Electrophotography – Image formation – Photoconductive member
Patent
1997-06-26
2000-02-22
Grimley, Arthur T.
Electrophotography
Image formation
Photoconductive member
399149, 399279, 430 56, 430 83, 430120, G03G 908, G03G 1500, G03G 1508
Patent
active
06029034&
ABSTRACT:
The invention seeks to provide an electrophotographic apparatus, which can have a simplified and safe construction in an image forming apparatus using an a-Si photo-sensitive drum and form clear images free from the flow of image or "fog". The image forming apparatus that is sought uses image development a non-magnetic uni-component toner prepared by a polymerization process as a preamble, and is characterized in that a developing roller is rotated in contact with an a-Si photo-sensitive drum via a layer of non-magnetic uni-component toner. The volume resistivity of the developing roller is set to 3.times.10.sup.7..OMEGA. cm or below. The photo-sensitive drum has a surface layer with an element ratio composition represented as (a-Si.sub.1-x C.sub.x :H), x being 0.95.ltoreq.x<1, the dynamic push hardness of the outer surface of the surface layer being 300 kgf/mm.sup.2 or below, the hardness of the surface layer being set to be higher on the inner side than on the outer surface, and a developing roller is rotated while carrying a non-magnetic uni-component toner prepared by a polymerization process at a peripheral speed different from that of the photo-sensitive drum, thereby causing the carried toner to rub the surface of the photo-sensitive drum for electrophotographic development.
REFERENCES:
patent: 5587774 (1996-12-01), Nagahara et al.
patent: 5610697 (1997-03-01), Arai
patent: 5679490 (1997-10-01), Yachi et al.
patent: 5701568 (1997-12-01), Hiroshima et al.
Itsukushima Keiji
Mukataka Hisashi
Ozawa Yoshio
Sato Yojiro
Chen Sophia S.
Grimley Arthur T.
Kyocera Corporation
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