Electrophotographic process and apparatus

Details Electrophotographic process and apparatus Electrophotographic process and apparatus

1991-06-27

1992-09-15

Moses, R. L.

Photocopying

Contact printing

Light boxes

355210, G03G 1500

Patent

active

051482258

ABSTRACT:
In electrophotographic process and apparatus of this invention, a drum-like photosensitive member and an endless toner-image bearing member are used. The bearing member is brought into close contact at a part thereof with the sensitive member. The sensitive member is electrically charged. After the bearing member is brought into close contact with the sensitive member, a latent image is formed on the sensitive member. The latent image is developed from an outer side of the bearing member so that a toner image is formed on its surface. To perform ordinary printing, the toner image is transferred onto a support member and then fixed. To conduct printing of multiple copies by using a master, the toner image on the bearing member is fused first to form a master, followed successively by electrical charging of the sensitive member, close contact of the master with the sensitive member, and whole-surface exposure from an outer side of the master. A latent image is formed on the sensitive member. Development of the latent image forms a toner image on the master, which is transferred onto a support member and then fixed.

REFERENCES:
patent: 2576047 (1951-11-01), Schaffert
patent: 3615128 (1971-10-01), Bhagat
patent: 3697160 (1972-10-01), Clark
patent: 3722992 (1973-03-01), Zweig
patent: 3738855 (1973-06-01), Gundlach
patent: 3778841 (1973-12-01), Gundlach et al.
patent: 3820985 (1974-06-01), Gaynor et al.
patent: 3937572 (1976-02-01), Gaynor et al.
patent: 4021106 (1977-05-01), Gaynor
patent: 4025188 (1977-05-01), Radler et al.

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