Two-component, dry electrographic developer compositions contain

Details Two-component, dry electrographic developer compositions contain Two-component, dry electrographic developer compositions contain

1983-11-04

1985-10-08

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Post imaging process, finishing, or perfecting composition...

4301066, 118657, 148108, G03G 914

Patent

active

045460604

ABSTRACT:
An electrographic, two-component dry developer composition comprising charged toner particles and oppositely charged, magnetic carrier particles, which (a) comprise a magnetic material exhibiting "hard" magnetic properties, as characterized by a coercivity of at least 300 gauss and (b) exhibit an induced magnetic moment of at least 20 EMU/gm when in an applied field of 1000 gauss, is disclosed.
The developer is employed in combination with a magnetic applicator comprising a rotatable magnetic core and an outer, nonmagnetizable shell to develop electrostatic images.

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