Engineering drawing electrophotocopier

Details Engineering drawing electrophotocopier Engineering drawing electrophotocopier

1980-11-07

1986-05-06

Braun, Fred L.

Photocopying

Projection printing and copying cameras

Combined with or convertible to a contact printer

355 3R, 355106, 355117, G03G 1504

Patent

active

045868107

ABSTRACT:
An electrophotocopier for relatively large and valuable originals such as engineering drawings, wherein an electrostatic image is formed by contact exposure using a fluorescent light source and wherein contamination of the original by solid or liquid components of the developer is prevented by a transparent membrane disposed between the photoconductive imaging surface and the original.

REFERENCES:
patent: 2689179 (1954-09-01), Walkup et al.
patent: 2917986 (1959-12-01), Williamson
patent: 3288605 (1966-11-01), Macklem
patent: 3308233 (1967-03-01), Button et al.
patent: 3308731 (1967-03-01), Olden
patent: 3549251 (1970-12-01), Olden
patent: 3676001 (1972-07-01), Botkin
patent: 3748034 (1973-07-01), Luebbe

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