Electrophotography – Image formation – Development
Patent
1999-02-04
2000-02-08
Grimley, Arthur T.
Electrophotography
Image formation
Development
399222, G03G 1501
Patent
active
060235993
ABSTRACT:
An image forming apparatus for developing an electrostatic latent image formed on an image carrier, which is rotatable around an central shaft thereof, with plural colors of toner comprises a developing unit assembly an outer peripheral portion of which retains a plurality of developing units each of which includes a developing roller being to be contacted with the image carrier to supply the associated color of the toner thereon, the developing unit assembly rotatable around a central shaft thereof, a first drive member for rotatively driving the developing roller positioned at a contact position of the developing roller and the image carrier, a second drive member for rotatively driving the developing unit assembly to subsequently position each of the developing roller at the contact position so a rotational direction of the developing unit assembly as to be opposed to a rotational direction of the developing unit assembly according to a reaction force derived from the driving of the first drive member.
REFERENCES:
patent: 4297027 (1981-10-01), Stemme et al.
patent: 5552877 (1996-09-01), Ishikawa et al.
Matsuzaka Satoshi
Nishimura Masayuki
Okoshi Takeshi
Fuji 'Xerox Co., Ltd.
Grimley Arthur T.
Ngo Hoang
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