Radiation imagery chemistry: process – composition – or product th – Electric or magnetic imagery – e.g. – xerography,... – Post imaging process – finishing – or perfecting composition...
Patent
1980-09-03
1981-08-18
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...
430121, G03G 908
Patent
active
042847010
ABSTRACT:
A toner material for use in developing images in an electrostatographic device is disclosed. The toner particles are initially classified according to a size distribution wherein less than 15% by weight are greater than 16 microns, between 7 and 15% by weight are less than 5 microns the remainder being from 5 to 16 microns and wherein the median particle size by weight is from 8 to 12 microns. The toner is used in a developer mix with carrier particles, and preferably the toner carrier mix is equilibrated such that the action of the developer mix and the machine provide a toner particle size distribution wherein less than 12% by weight are greater than 16 microns, between 15 and 30% by weight are less than 5 microns, the remainder being from 5 to 16 microns, and wherein the median particle size by weight is between 6.5 and 9.5 microns. An equilibrated toner particle distribution is also disclosed.
REFERENCES:
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patent: 3586654 (1971-06-01), Lerman et al.
patent: 3674736 (1974-07-01), Lerman et al.
patent: 3910846 (1975-10-01), Azar
patent: 3989648 (1976-11-01), Lenhard
patent: 4122024 (1978-10-01), Jones et al.
Xerox Disclosure Bul. #5, vol. 2, (9-10/1977).
Abbott Jerry J.
Fuller Sterritt R.
Jachimiak Paul D.
International Business Machines - Corporation
Sirr Francis A.
Welsh John D.
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