Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1978-11-13
1980-02-26
Moses, R. L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
118652, 355 3DD, 430120, 430126, G03G 2100
Patent
active
041903510
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 electromechanical scavenger assembly comprising a movable magnet and a fixed non-magnetizable shield mounted in close association between said magnet and the photoconductive surface. During the copying cycle, the magnet is moved adjacent the fixed shield 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 magnet is moved away from the fixed shield to withdraw the strong magnetic field from 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: 3543720 (1970-12-01), Drexler et al.
patent: 3643629 (1972-02-01), Kangas et al.
Clifford Lawrence E.
Macaluso Paul J.
Moses R. L.
Pitney-Bowes Inc.
Scribner Albert W.
Soltow, Jr. William D.
Wittstein Martin D.
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