Magnetic brush development roller

Details Magnetic brush development roller Magnetic brush development roller

1997-06-03

1999-11-02

Barlow, John

Recorders

Magnetographic

Magnetographic head

347169, G11B 900, B41J 2385, G01D 1506

Patent

active

059780010

ABSTRACT:
A magnetic brush development roller assembly for an electrographic printer includes a cylindrical multipole magnet mounted for rotation about a cylindrical axis; and a conductive non-magnetic stationary shell surrounding the multipole magnet. The shell defines an axial slot for receiving an imaging head, and has a region of reduced conductance extending substantially around the circumference of the shell, whereby eddy currents generated by rotation of the magnet within the shell and hence resistive heating and drag on the magnet are reduced.

REFERENCES:
patent: 3914771 (1975-10-01), Lunde et al.

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