Magnetic brush developing apparatus

Details Magnetic brush developing apparatus Magnetic brush developing apparatus

1992-10-27

1994-04-26

Smith, Matthew S.

Photocopying

Contact printing

Light boxes

118656, 355253, G03G 1509

Patent

active

053071263

ABSTRACT:
A developing sleeve rotary type magnetic brush developing apparatus which includes a developing sleeve having a magnet member with magnetic poles in it, an insulative layer provided on the surface of the developing sleeve, and a toner supply roll disposed for rotation in the vicinity of the developing sleeve. The toner supply roll is arranged to be formed with a thin charged toner layer on its surface, with an A.c. voltage of 0.5 to 3 kV, and 50 Hz to 3 kHz being impressed between the toner supply roll and the developing sleeve.

REFERENCES:
patent: 4615606 (1986-10-01), Nishikawa
patent: 4791882 (1988-12-01), Enoguchi et al.
patent: 4901116 (1990-02-01), Hameda et al.
patent: 4987454 (1991-01-01), Natsuhara et al.
patent: 5008917 (1991-04-01), Toyoshi et al.
patent: 5086728 (1992-02-01), Kinoshita
patent: 5140373 (1992-08-01), Ikegawa et al.

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