Electrophotographic development process

Details Electrophotographic development process Electrophotographic development process

1990-11-20

1992-10-27

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

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

Post imaging process, finishing, or perfecting composition...

430108, 430126, G03G 910

Patent

active

051588528

ABSTRACT:
An electrophotographic development process is disclosed, in which a visible toner image is fixed after it is transferred onto transfer members, the visible toner image being formed by a development device equipped with a photosensitive substance for forming a latent image and a visible image, a magnetic field source device, arranged in the vicinity of the photosensitive substance, having a movable member for conveying a developer on the surface and forming magnetic brush, a developement container supporting the magnetic field source device and a developer regulating plate, the improvement wherein the developer is a mixture of carriers and toner, and wherein the carrier are at least one of spherical, substantially spherical, and flake-like shapes and a mixture of at least one kinds of carriers ranging from 30 to 150 .mu.m in average grain size. According to the present invention, motor load is reduced by torque drop, a stirring device and its accessory parts are omitted, and as a result, the development device can be made compact and less costly.

REFERENCES:
patent: 2965573 (1960-12-01), Gundlach
patent: 4301228 (1981-11-01), Kori et al.
patent: 4640880 (1987-02-01), Kawanishi et al.
patent: 4698289 (1987-10-01), Aldrich et al.

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