Electrostatic photographic copying process

Details Electrostatic photographic copying process Electrostatic photographic copying process

1979-11-28

1982-02-09

Schilling, Richard L.

Radiation imagery chemistry: process, composition, or product th

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

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

430107, 430126, 430111, 430903, G03G 1309

Patent

active

043150640

ABSTRACT:
Disclosed is an electrostatic photographic copying process comprising causing a substrate carrying an electrostatic latent image thereon to fall in contact with a magnetic brush of a one-component type magnetic developer to effect development of the electrostatic latent image and electrostatically transferring the formed image of the developer onto a transfer sheet, wherein a magnetic developer having an electrostatic capacity of 7.8 to 9.8 PF (picofarad) as determined under conditions of an electrode spacing of 0.65 mm, an electrode sectional area of 1.43 cm.sup.2 and an electrode load of 105 cm.sup.2 and a dielectric constant of 4 to 5 as determined under the above conditions is used as the one-component type magnetic developer.

REFERENCES:
patent: 3239465 (1966-03-01), Rheinfrank
patent: 3345294 (1967-10-01), Cooper
patent: 3697268 (1972-10-01), Ohta
patent: 3901695 (1975-08-01), Shelffo
patent: 3965022 (1976-06-01), Strong
patent: 4102305 (1978-07-01), Schwarz
patent: 4121931 (1978-10-01), Nelson
patent: 4146494 (1979-03-01), Hectors et al.
patent: 4175962 (1979-11-01), Sadamatsu
patent: 4187330 (1980-02-01), Harada
patent: 4192902 (1980-03-01), Lu

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