Apparatus for duplicating micro-films

Details Apparatus for duplicating micro-films Apparatus for duplicating micro-films

1979-04-24

1981-02-24

Griffin, Donald A.

Photocopying

Contact printing

Machine

G03B 2722

Patent

active

042524377

ABSTRACT:
An apparatus for duplicating micro-films utilizing a cold light tube aligned axially within a transparent cylinder and a conveyor band tensioned by a tension roller and conducted around the transparent cylinder for conveying a superimposed assembly of the original to be copied and the film foil to be exposed into and out of an exposure position while pressing the assembly against the outer surface of the transparent cylinder. The radial distance between the outer surface of the cold light tube and external surface of the transparent cylinder being less than the diameter of the cold light tube. The conveyor band being operated by a reversible drive system employing rotatable chain sprockets.

REFERENCES:
patent: 1876442 (1932-09-01), Arni
patent: 2895395 (1959-07-01), Gern
patent: 3520604 (1970-07-01), Shelffo
patent: 3639060 (1972-02-01), Jaskowsky

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