Drum cleaning process and apparatus for electrophotography

Details Drum cleaning process and apparatus for electrophotography Drum cleaning process and apparatus for electrophotography

1978-06-27

1980-05-06

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

15 15R, 118652, 250325, 355 3CH, 430125, G03G 2100

Patent

active

042014654

ABSTRACT:
Charging, imaging, developing, transfer and cleaning units are operatively arranged about the circumference of a rotary photoconductive drum, the developing unit comprising a magnetic brush. A discharge unit is disposed between the transfer unit and the cleaning unit and comprises a light source and a corona discharge element to simultaneously illuminate the drum causing photoconduction and expose the drum to an electric field thereby neutralizing any residual charge on the drum and residual toner particles remaining on the drum after the transfer operation. The residual toner is subsequently removed by the magnetic brush of the developing unit.

REFERENCES:
patent: 3637306 (1972-01-01), Cooper
patent: 3647293 (1972-03-01), Queener
patent: 3797927 (1974-03-01), Takahashi et al.
patent: 3914045 (1975-10-01), Namiki et al.
IBM Tech. Disc. Bull., "Xerographic System", vol. 16, No. 9, Feb. 1974, p. 2958.

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