Electrostatic copying apparatus

Details Electrostatic copying apparatus Electrostatic copying apparatus

1983-02-09

1985-07-23

Moses, Richard L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

1525652, 118652, G03G 2100

Patent

active

045305960

ABSTRACT:
A cleaning system for an electrostatic copying apparatus has a cleaning roller in pressure contact with a toner supporting member for removing residual toner therefrom. The cleaning roller is impressed with a bias voltage of polarity opposite to the electric charge held by the residual toner. The cleaning roller comprises an axle, a conductive elastic layer around the axle, and a thin porous film formed as an outer most layer over the elastic layer. The thin film is preferably made of polytetrafluorethylene and is a porous and soft film. The cleaning system also includes a discharging electrode arranged before the cleaning roller, and a scraper for removing toner adhering to the cleaning roller.

REFERENCES:
patent: 3807853 (1974-04-01), Hudson
patent: 3848994 (1974-11-01), Fraser
patent: 4101215 (1978-07-01), Fottner et al.

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