Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Process of making developer composition
Patent
1985-07-05
1987-07-07
Goodrow, John L.
Radiation imagery chemistry: process, composition, or product th
Electric or magnetic imagery, e.g., xerography,...
Process of making developer composition
430108, G03G 910
Patent
active
046787348
ABSTRACT:
A process for the preparation of developer compositions which comprises (1) providing carrier particles consisting of a core with a coating thereover; (2) introducing the carrier particles into a blending apparatus; (3) adding to the blending apparatus fine toner particles with a diameter of from about 2 microns to about 10 microns, said particles being comprised of toner resin particles, pigment particles, and a charge enhancing additive; (4) affecting blending for a period of time sufficient to enable the classified toner particles to alter the tribogenerating ability of the surface of the carrier particles and become embedded therein; (5) subsequently adding to the resulting blended mixture toner particles of a diameter of from about 2 to about 18 microns, and comprised of toner resin particles, pigment particles, and a charge enhancing additive; and (6) blending for a period of form about 1 minute to about 5 minutes.
REFERENCES:
patent: 3970571 (1976-07-01), Olson et al.
patent: 4233387 (1980-11-01), Mammino et al.
Laing John R.
Maniar Deepak R.
Williams Meurig W.
Zimmer C. D.
Goodrow John L.
Palazzo E. O.
Xerox Corporation
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