Developing device

Details Developing device Developing device

1983-08-09

1985-04-02

Pianalto, Bernard D.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

118658, G03G 1506

Patent

active

045080526

ABSTRACT:
A developing device is provided with a nonmagnetic sleeve being rotatable and buried in a mixture of a nonmagnetic toner and a magnetic carrier in a casing. A magnet is contained in the sleeve so that a magnetic brush is formed from the mixture on the sleeve. A developing roller is disposed rotatable between the sleeve and a photosensitive drum, and is separated from the drum and in contact with the magnetic brush. A power source is connected to the roller and the sleeve to generate an electric field between the same so that the toner electrostatically attracted to the sleeve is transferred to the roller. Thus, the toner attracted to the roller is carried close to the drum as the roller rotates, and is attracted to the electrostatic latent image by a surface potential defined by the latent image to develop the latent image.

REFERENCES:
patent: 4164372 (1979-08-01), Gundlach et al.
patent: 4370049 (1983-01-01), Kuge et al.

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