Process for charging toner compositions

Details Process for charging toner compositions Process for charging toner compositions

1984-02-21

1985-06-18

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

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

Process of making developer composition

G03G 910

Patent

active

045241201

ABSTRACT:
An improved process for rapidly charging toner particles which comprises (I) adding uncharged replenishment toner particles to a charged developer composition comprised of carrier particles and toner particles, the carrier particles consisting of a core containing a continuous polymer coating thereover having incorporated therein a fluoropolymer, contained on from about 1 percent to about 20 percent of the surface area of the coating, (II) contacting the charged developing composition containing said carrier particles with uncharged toner particles wherein charges are transferred to the uncharged toner particles within a mixing period of from about 5 seconds to about 5 minutes, thereby resulting in substantially the same level of charge intensity for said uncharged toner particles as the charge intensity for the charged toner particles in the charged developer composition, which charge intensity for example is from about 5 microcoulombs per gram to about 50 microcoulombs per gram of toner particles.

REFERENCES:
patent: 3833366 (1974-09-01), Madrid et al.
patent: 3922381 (1975-11-01), Datta
patent: 3922382 (1975-11-01), Kukla et al.
patent: 3970571 (1976-07-01), Olson et al.
patent: 4073980 (1978-02-01), Westdale et al.
patent: 4225660 (1980-09-01), Russell, Jr.
patent: 4304830 (1981-12-01), Bolte et al.
patent: 4378420 (1983-03-01), Gruber et al.

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