Copying machine with electromagnetic scavenger assembly and proc

Details Copying machine with electromagnetic scavenger assembly and proc Copying machine with electromagnetic scavenger assembly and proc

1978-11-13

1980-07-01

Moses, R. L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

118652, 355 3DD, G03G 2100

Patent

active

042103975

ABSTRACT:
In an electrostatic copying method and apparatus employing a two-component image-developer composition comprising magnetizable carrier particles and toner pigment particles, the removal of magnetizable carrier particles from the photoconductive surface is accomplished by means of an electromagnetic scavenger assembly comprising an electromagnet and a fixed nonmagnetizable shield mounted in close association between said electromagnet and the photoconductive surface. During the copying cycle, the electromagnet is energized to create a strong magnetic field around the shield and to cause magnetizable articles to be drawn against the shield from the photoconductive surface. After the copying cycle, the electromagnet is automatically de-energized to discontinue the strong magnetic field in the area of the shield, causing the magnetizable particles to fall from the shield into a collection tray by means of gravity.

REFERENCES:
patent: 2892446 (1959-06-01), Olden
patent: 3333572 (1967-08-01), Olden
patent: 3643629 (1972-02-01), Kangas et al.
patent: 3703395 (1972-11-01), Drexler et al.

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