Photographic exposure masks

Details Photographic exposure masks Photographic exposure masks

1981-12-07

1983-08-23

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Detailed holder for photosensitive paper

355126, G03B 2758

Patent

active

044000847

ABSTRACT:
An exposure mask 9 for photographic material 4 includes a measuring wheel 23 and two adjustable mask blades 19 and 20. Movement of the photographic material 4 causes rotation of the wheel 23, which causes a switching member 34 to approach a switch 42. When the switching member 34 reaches the switch 42 it stops the transport of the material 4. Adjustment of one mask blade 20 adjusts the initial distance between the switching member 34 and the switch 42.

REFERENCES:
patent: 2891443 (1959-06-01), Pollock
patent: 3488119 (1970-01-01), Dixon et al.
patent: 3674365 (1972-07-01), Kohler et al.
patent: 3732010 (1973-05-01), Hartery et al.
patent: 3737227 (1973-06-01), Harter et al.
patent: 3807861 (1974-04-01), Nosco et al.
patent: 4320965 (1982-03-01), Kimura et al.
patent: 4325630 (1982-04-01), Kimura et al.

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