Photographic copying machine with interchangeable format masks

Details Photographic copying machine with interchangeable format masks Photographic copying machine with interchangeable format masks

1977-12-23

1980-12-23

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Detailed holder for photosensitive paper

355 75, 335206, 335207, 361171, G03B 2758, G03B 2762

Patent

active

042407443

ABSTRACT:
A photographic copying machine wherein any one of a series of masks, each having a differently dimensioned light-transmitting opening, can be placed onto a locating plate which supports a battery of fixedly mounted or mobile magnetic actuators for discrete electric switching elements. Each mask carries a different array of soft magnets which displace or otherwise influence a group of actuators so that the thus influenced actuators open or close the associated switching elements which adjust the exposure controls and/or another system of the copying machine in dependency on the size and/or shape of the opening in the selected mask. The soft magnets on each mask influence a different group (e.g., a different number) of actuators each of which is an H-shaped permanent magnet.

REFERENCES:
patent: 3325756 (1967-06-01), Maxwell
patent: 3488119 (1970-01-01), Dixon et al.
patent: 3506939 (1970-04-01), Hesser et al.
patent: 3588766 (1971-06-01), Baermann
patent: 3622922 (1971-11-01), Mogi et al.

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