Electrophotography – Image formation – Development
Patent
1999-06-08
2000-05-16
Chen, Sophia S.
Electrophotography
Image formation
Development
399281, 399285, G03G 1508
Patent
active
060648473
ABSTRACT:
A developing device for developing an electrostatic latent image on a photoconductive member has a developing roller that bears a one-component developer on its surface and develops the electrostatic latent image by contacting the photoconductive member; a supply roller for supplying developer to the developing roller; and a blade that contacts the developing roller so as to regulate a layer thickness of the developer supplied by the supply roller, wherein supposing that the developer has a volume-average particle size represented by Dbk, the developer at this time being maintained on the developing roller as a layer that has been supplied by the supply roller and again formed so as to have a predetermined thickness by the blade after the developing roller, on which the developer was formed as a layer having a predetermined thickness, carried out a black-image developing process, and supposing that the volume-average particle size of the developer is Dwt, the developer at this time being maintained on the developing roller as a layer that has been supplied by the supply roller and again formed so as to have a predetermined thickness by the blade after the developing roller, on which the developer was formed as a layer having a predetermined thickness, carried out a white-image developing process, an inequality, Dwt/Dbk>0.8, is satisfied.
REFERENCES:
patent: 5367367 (1994-11-01), Ikeda et al.
patent: 5477006 (1995-12-01), Imamiya et al.
U.S. Patent application Ser. No. 09/256,616; filed Feb. 23, 1999, pending.
U.S. Patent application Ser. No. 09/239,122; filed Jan. 28, 1999, pending.
U.S. Patent application Ser. No. 09/244,582; filed Feb. 4, 1999, pending.
Azuma Nobuyuki
Iwamatsu Tadashi
Chen Sophia S.
Sharp Kabushiki Kaisha
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