Electrophotography – Image formation – Development
Patent
1999-11-10
2000-12-12
Brase, Sandra
Electrophotography
Image formation
Development
430122, G03G 1509
Patent
active
06160979&
ABSTRACT:
An image forming apparatus including a rotatable image supporter having photoconductive properties, an optical image irradiating device configured to irradiate the image supporter with a light beam to form an electrostatic latent image thereon, and a developing device including a developer, which includes a magnetic carrier and a toner, and a developer supporter which bears the developer on the surface thereof and configured to feed the developer to a developing area between the image supporter and the developer supporter to develop the electrostatic latent image, wherein a ratio of a toner content in a first portion of the developer in the developing area relatively close to the surface of the image supporter to a toner content in a second portion of the developer in the developing area relatively close to the surface of the developer supporter is not less than about 0.6, measured when the developer contacts a continuous non-image area formed on the image supporter.
REFERENCES:
patent: 4544618 (1985-10-01), Kopko
patent: 5311262 (1994-05-01), Shimizu et al.
patent: 5440378 (1995-08-01), Matsuura
patent: 5483329 (1996-01-01), Asanae et al.
patent: 5565966 (1996-10-01), Ochiai et al.
patent: 5915155 (1999-06-01), Shoji et al.
Brase Sandra
Ricoh & Company, Ltd.
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