Developer composition for non-interactive magnetic brush development
AssigneeXerox Corporation
InventorsRobert J. Meyer, Dale R. Mashtare, John F. Knapp
Life of this patent
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Abstract
An electrographic, two-component dry developer composition comprising charged toner particles and oppositely charged carrier particles which (a) includes: a soft magnetic material exhibiting a coercivity of less than 300 gauss when magnetically saturated and (b) exhibit an induced magnetic moment of less than 20 EMU/gm of carrier when in an applied field of 1000 gauss; and a hard magnetic material exhibiting a coercivity of at least 300 gauss when magnetically saturated and (b) exhibit an induced magnetic moment of at least 20 EMU/gm of carrier when in an applied field of 1000 gauss.
Claims8
An electrographic, two-component dry developer composition comprising charged toner particles and oppositely charged carrier particles which comprise:
- a soft magnetic material exhibiting a coercivity of less than 300 gauss when magnetically saturated and exhibit a magnetic remanence of less than 20 EMU/gm when in an applied field of 1000 gauss;
- and
- a hard magnetic material exhibiting a coercivity of at least 300 gauss when magnetically saturated and an induced magnetic moment of at least 20 EMU/gm when in an applied field of 1000 gauss.
Dependencies are inferred from the claim text.