Method of forming dichromatic copy images

Details Method of forming dichromatic copy images Method of forming dichromatic copy images

1983-11-30

1985-09-03

Martin, Roland E.

Radiation imagery chemistry: process, composition, or product th

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

To produce color reproduction

430 31, 430 42, 430122, G03G 1301, G03G 1309

Patent

active

045392811

ABSTRACT:
The invention disclosed concerns a method of forming dichromatic copy images. An electrostatic latent image having a first image portion and a second image portion is formed. The first image portion is developed by a first magnetic brush developing device using at least a magnetic toner of first color triboelectrically chargeable to a specific polarity. The second image portion is developed by a second magnetic brush developing device using a mixture of a magnetic carrier substantially not triboelectrically chargeable with the magnetic toner and a non-magnetic toner of a second color triboelectrically chargeable to a polarity opposite to that of the magnetic toner by contact with the magnetic carrier.

REFERENCES:
patent: 4038544 (1977-07-01), Shenoy
patent: 4039831 (1977-08-01), Lehmann
patent: 4045219 (1977-08-01), Bean
patent: 4078929 (1978-03-01), Gundlach
patent: 4250239 (1981-02-01), Sakai
patent: 4264185 (1981-04-01), Ohta
patent: 4308821 (1982-01-01), Matsumoto et al.
patent: 4310610 (1982-01-01), Sakai
patent: 4335194 (1982-06-01), Sakai
patent: 4384033 (1983-05-01), Sakai
patent: 4493881 (1985-01-01), Mitchell et al.

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