Electrophotographic method using hard magnetic carrier particles

Details Electrophotographic method using hard magnetic carrier particles Electrophotographic method using hard magnetic carrier particles

1989-07-28

1991-03-19

Martin, Roland E.

Radiation imagery chemistry: process, composition, or product th

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

To produce color reproduction

430122, G03G 1301, G03G 1309

Patent

active

050010280

ABSTRACT:
A multicolor reproduction is made by uniformly charging a photoconductive member, imagewise exposing that member to create a first electrostatic image, developing the first electrostatic image with a toner of a first color to create a first toner image, preferably uniformly recharging the photoconductive member, imagewise exposing the charged member creating a second electrostatic image, developing the second electrostatic image by the application of toner of a second color to the exposed areas. The process can be repeated for any number of colors. The multicolor image is then transferred in a single step to a receiving sheet. The second and subsequent development steps are carried out by a magnetic brush developing device employing hard magnetic carrier particles that are tumbled through a development zone which tumbling does not adversely affect the prior toner images. Preferably the hard magnetic carrier particles have a coercivity of at least 100 gauss when magnetically saturated, but more preferably a coercivity of at least 1000 gauss when magnetically saturated.

REFERENCES:
patent: 4191465 (1980-03-01), Boase et al.
patent: 4194829 (1980-03-01), Cavagnaro
patent: 4308821 (1982-01-01), Matsumoto et al.
patent: 4309498 (1982-01-01), Yamashita et al.
patent: 4473029 (1984-09-01), Fritz et al.
patent: 4531832 (1985-07-01), Kroll et al.
patent: 4546060 (1985-10-01), Miskinis et al.
patent: 4599285 (1986-07-01), Haneda et al.
patent: 4629669 (1986-12-01), Shoji et al.
patent: 4637973 (1987-01-01), Shigeta et al.
patent: 4731634 (1988-03-01), Stark

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