Photocopying – Projection printing and copying cameras – Combined with or convertible to a contact printer
Patent
1983-01-12
1985-05-07
Moses, Richard L.
Photocopying
Projection printing and copying cameras
Combined with or convertible to a contact printer
118652, 1525652, G03G 2100
Patent
active
045154678
ABSTRACT:
A magnet brush cleaning apparatus for removing a toner which has been left non-transferred on the surface of a photoconductive element. The residual toner is attracted by and supported on a rotary sleeve on which a magnetic carrier forms a magnet brush. The magnetic carrier separated from the magnet brush and the residual toner are separated from each other by an electrode which is disposed in a circulatory carrier supply path in order to develop an intense electric field. The thus separated carrier is returned to the sleeve. The electrode may take the form of a roller, a plate or a wire. The residual toner on the photoconductive element has its amount of charge reduced in advance by a discharging unit. A substantial amount of the residual toner is scraped off the photoconductive element by a fur brush. A desired amount of the carrier is discharged and replenished automatically in response to lowering of the cleaning ability of the apparatus.
REFERENCES:
patent: 3926517 (1975-12-01), Nagahara
patent: 3950089 (1976-04-01), Fraser et al.
patent: 4436412 (1984-03-01), Yamagata et al.
Alexander David G.
Moses Richard L.
Ricoh & Company, Ltd.
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