Process for producing toner for developing electrostatic images

Details Process for producing toner for developing electrostatic images Process for producing toner for developing electrostatic images

1987-10-15

1989-07-04

Rosenbaum, Mark

Solid material comminution or disintegration

Processes

With application of fluid or lubricant material

241 23, 241 24, 241 39, 241 791, 241 80, 430137, B02C 1912

Patent

active

048443492

ABSTRACT:
A toner for producing electrostatic latent images is produced by classifying a pulverized feed material into a coarse powder and a fine powder in a first classifying means, pulverizing and recycling the coarse powder to the first classifying means, introducing the fine powder into a multi-division classifying chamber divided into at least three sections where the fine powder is classified into at least a coarse powder fraction, a medium powder fraction and a fine powder fraction. The medium powder fraction is recovered to provide a toner. The coarse powder fraction is recycled to the first classifying means.

REFERENCES:
patent: 3856217 (1974-12-01), Brewer
patent: 4284701 (1981-08-01), Abbott
patent: 4304360 (1981-12-01), Luhr et al.
patent: 4418871 (1983-12-01), Powell
patent: 4581312 (1986-04-01), Nakahara

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