Magnetic brush apparatus for electrostatic printing system

Details Magnetic brush apparatus for electrostatic printing system Magnetic brush apparatus for electrostatic printing system

1979-01-04

1980-11-18

Lawrence, Evan K.

Coating apparatus

With means to apply electrical and/or radiant energy to work...

With electromagnetic and/or electrostatic removal of...

118658, 355 3DD, G03G 1509

Patent

active

042339359

ABSTRACT:
A magnetic brush apparatus is provided with a hopper for supplying powdered one-component magnetic developer to a cylindrical sleeve housing a rotating magnet roller with a number of magnetic poles. The powdered magnetic toner supplied onto the sleeve surface is formed into a magnetic brush on the sleeve surface under control of alternating magnetic field generated by the magnet roller. The magnet brush is carried around the sleeve surface with rotation of the magnet roller. Outside the sleeve surface a predetermined distance is positioned a magnetic member which may be attached to the tip end of a doctor blade. The magnetic member disturbs the alternating magnetic field on the sleeve surface, thereby restricting the height of the powdered developer passing between the end of the magnetic member and the sleeve surface.

REFERENCES:
patent: 3858514 (1975-01-01), Beebe et al.
patent: 3962992 (1976-06-01), Takagi et al.
patent: 4081571 (1978-03-01), Nishihama et al.

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