Photographic copying apparatus with master format adjustment

Details Photographic copying apparatus with master format adjustment Photographic copying apparatus with master format adjustment

1987-06-22

1988-06-28

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

Plural

355 67, G03B 2744, G03B 2754

Patent

active

047543078

ABSTRACT:
In the exposure beam path of a copy master which may have various formats, a four element variable objective is provided with stationary rear and front elements and variable intermediate elements. The rear element is arranged in a carousel-like automatic changer and may be replaced together with a master masks. A control device performs, by means of step motors and spindles, the automatic adjustment of the intermediate elements of the variable objective as a function of a particular master format set, in a manner such that the area of the copy master exposed to the copying light is automatically adapted to the master format.

REFERENCES:
patent: 2270050 (1942-01-01), Grimson
patent: 2425863 (1947-08-01), Carlson

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