Magnetic toner particles coated with opaque polymer particles to

Details Magnetic toner particles coated with opaque polymer particles to Magnetic toner particles coated with opaque polymer particles to

1982-11-01

1984-12-04

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...

430 39, 430137, 430138, 430111, 427221, 428407, 106304, 106308M, 521 55, G03G 908

Patent

active

044865236

ABSTRACT:
The present invention relates to magnetic toners and processes for producing them. The toner materials that are produced have the color of the magnetic material substantially obscured while still maintaining the high percentages of magnetic materials necessary for many types of magnetic printing processes. Further, the toners may be provided with a desired shade or color with dyes or pigments. The process of production preferably involves the coating of the individual magnetic particles with low-density essentially opaque polymeric particulate material having an affinity for the magnetic particles, thereby obscuring the color of said magnetic particles. The resulting coated particles may be intermixed with dyes, pigments, binders and other material as desired to produce toners which are useful for a variety of purposes, including multi-color reproduction techniques.

REFERENCES:
patent: 2890968 (1959-06-01), Giaimo, Jr.
patent: 3484262 (1969-12-01), Hahn
patent: 3520811 (1970-07-01), Swoboda
patent: 3816169 (1974-06-01), Vassiliades et al.
patent: 3824601 (1974-07-01), Garland et al.
patent: 4254204 (1981-03-01), Kato et al.
patent: 4443527 (1984-04-01), Heikens et al.

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