Electrophotography – Image formation – Development
Reexamination Certificate
2011-01-04
2011-01-04
Ngo, Hoang (Department: 2852)
Electrophotography
Image formation
Development
C399S284000
Reexamination Certificate
active
07865118
ABSTRACT:
A developing device that can reliably supply toner from a toner supply roller to a developing roller and that does not generate scraping irregularities in the toner thin layer on the developing roller, and a process cartridge and an image forming apparatus having the same. The developing device has: a toner supply chamber; a developing roller provided in the toner supply chamber; a toner supply roller provided in the toner supply chamber for supplying toner to the developing roller; and a layer regulation member for forming the toner on the developing roller into a thin layer, and develops electrostatic latent images on an image carrier by applying bias voltage to the developing roller. An intermediate contact member is interposed between the developing roller and the toner supply roller. The intermediate contact member is a sheet member fixed at one end, and the free end of the sheet member is interposed between the developing roller and the toner supply roller, with the free end side protruding therebetween.
REFERENCES:
patent: 6343201 (2002-01-01), Wada et al.
patent: 08-220872 (1996-08-01), None
patent: 08-248770 (1996-09-01), None
patent: 3197934 (2001-06-01), None
Abstract of JP 05-273848 published Oct. 22, 1993.
Inoue Ryuji
Murayama Shin
Nakagawa Shuuichi
Ohnishi Kazushige
Yamada Shintaro
Harness & Dickey & Pierce P.L.C.
Ngo Hoang
Ricoh & Company, Ltd.
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