Electrographic printer comprising a magnetic brush and a hall ef

Details Electrographic printer comprising a magnetic brush and a hall ef Electrographic printer comprising a magnetic brush and a hall ef

1996-06-07

1997-12-23

Grimley, Arthur T.

Electrophotography

Control of electrophotography process

Control of developing

347 55, 399267, G03G 1509

Patent

active

057015520

ABSTRACT:
An electrographic printer includes: a magnetic brush having a stationary outer shell and a rotating multi-pole magnet within the outer shell; an electrographic print head mounted on the outer shell of the magnetic brush; a Hall effect sensor located adjacent to the magnetic brush for detecting a field produced by the multi-pole magnet parallel to the surface of the shell and producing an output signal; and a pulse control circuit connected to the Hall effect sensor for detecting zero crossings of the output signal and supplying printing pulses to the electrographic print head in response thereto.

REFERENCES:
patent: 3914771 (1975-10-01), Lunde et al.
patent: 4454520 (1984-06-01), Braschler et al.
patent: 5444470 (1995-08-01), Muto et al.

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