Imaging system

Details Imaging system Imaging system

1974-05-30

1976-03-09

Klein, David

Gas separation: apparatus

Magnetic separating means

252 621, G03G 900

Patent

active

039429792

ABSTRACT:
An electrostatographic imaging process comprising the steps of providing an electrostatographic imaging member having a recording surface, forming an electrostatic latent image on said recording surface, and contacting said electrostatic latent image with a developer mixture comprising classified toner materials electrostatically clinging to the surface of classified high surface area carrier materials, said classified toner materials having a particle size number distribution with a fine index ratio of less than about 2.50, a particle size volume distribution with a coarse index ratio less than about 1.50, and a particle size distribution wherein less than about 30.0 percent by number of the toner particles have an average particle size diameter of less than about 5 microns, about 25% of the particles have a diameter between about 8 microns and about 12 microns, and less than about 5% by number of the toner particles have an average particle diameter greater than about 20 microns, said classified high surface area carrier materials having a specific surface area of at least about 150 cm.sup.2 /gram, whereby at least a portion of said finely-divided toner particles are attracted to and deposited on said recording surface in conformance with said electrostatic latent image.

REFERENCES:
patent: 3080251 (1963-03-01), Claus
patent: 3533835 (1970-10-01), Hagenbach et al.
patent: 3586654 (1971-06-01), Lerman
patent: 3650797 (1972-03-01), Tomanek
patent: 3674736 (1972-07-01), Lerman
patent: 3745118 (1973-07-01), Brynko

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