Masked magnetic brush direct writing for high speed and color pr

Details Masked magnetic brush direct writing for high speed and color pr Masked magnetic brush direct writing for high speed and color pr

1992-08-05

1994-07-05

Miller, Jr., George H.

Recorders

Electric recording

Electrochemical

G01D 1506

Patent

active

053271696

ABSTRACT:
Direct electrostatic printing apparatus including structure for delivering developer or toner particles to a printhead forming an integral part of the printing device. The printing device includes, in addition to the printhead, a conductive shoe which is suitably biased during a printing cycle to assist in the electrostatic attraction of developer through apertures in the printhead onto the copying medium disposed intermediate the printhead and the conductive shoe. The structure for delivering developer or toner is adapted to deliver toner containing a minimum quantity of wrong sign. To this end, the developer delivery system is conventional magnetic brush which delivers toner directly to the printhead structure.

REFERENCES:
patent: 3689935 (1972-09-01), Pressman et al.
patent: 4491855 (1985-01-01), Fujii et al.
patent: 4568955 (1986-02-01), Hosoya et al.
patent: 4755837 (1988-07-01), Schmidlin et al.
patent: 4814796 (1989-03-01), Schmidlin
patent: 5235354 (1993-08-01), Larson

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