Electrographic recording apparatus

Details Electrographic recording apparatus Electrographic recording apparatus

1982-06-15

1984-08-07

Tarcza, Thomas H.

Recorders

Electric recording

Electrochemical

118639, G01D 1506

Patent

active

044646720

ABSTRACT:
Electrographic apparatus providing electrographic stylus recording using magnetically attractable toner powder supplied to a recording region while electrical signals are applied to styli to deposit toner powder onto a receptor recording member. At least one side of the stylus array has a rotatable sleeve member with an enclosed magnet disposed near the stylus array to remove excess toner powder that is magnetically drawn from the recording region. A toner removal means removes toner powder drawn to the sleeve member for return to a toner powder hopper. The toner removal means can be a stationary sleeve within which a rotatable magnetic assembly is carried. The stationary sleeve is positioned near the rotatable sleeve to remove toner powder that is carried by the rotatable sleeve. Toner powder is directed to a flange on the stationary sleeve and, then, to a pathway providing for return of the toner powder to the toner powder hopper. The toner removal means can also be a magnetic shunt member for the magnet and/or a blade member positioned near the rotatable sleeve member.

REFERENCES:
patent: 4112156 (1978-09-01), Swackhamer
patent: 4316198 (1982-02-01), Erickson
patent: 4402000 (1983-08-01), Fabel et al.

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