Developing apparatus

Details Developing apparatus Developing apparatus

1988-01-19

1990-05-15

Grimley, A. T.

Coating apparatus

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

With electromagnetic and/or electrostatic removal of...

355253, 355326, G03G 1509, G03G 1501

Patent

active

049248065

ABSTRACT:
A developing apparatus is disposed adjacent to an electrostatic latent image support member in an image forming apparatus, and includes a rotatable developing sleeve confronting the electrostatic latent image support member, a magnetic roller disposed inside the developing sleeve for holding magnetic carrier on a peripheral surface of the developing sleeve, and a plurality of toner supply units confronting the developing sleeve for supplying toner to the developing sleeve. The magnetic roller accommodates a plurality of magnetic poles extending in a direction of its axis. Each toner supply unit is provided with a toner supply roller rotatable in contact with a magnetic brush held on the developing sleeve and a toner storing portion for storing the toner. A control device and an operation panel is also provided for selectively rotating either of the toner supply rollers by means of a driving source, for selecting the toner stored in any of the toner supply units, and for controlling the movement of the toner supply roller.

REFERENCES:
patent: 4089601 (1978-05-01), Navone
patent: 4378158 (1983-03-01), Kanbe
patent: 4422405 (1983-12-01), Kasahara et al.
patent: 4570570 (1986-02-01), Masham
patent: 4615606 (1986-10-01), Nishikawa
patent: 4652115 (1987-03-01), Palm et al.
patent: 4724457 (1988-02-01), Abreu et al.
patent: 4746951 (1988-05-01), Hayakawa et al.
patent: 4786936 (1988-11-01), Ikegawa et al.

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