Control device for controlling a diaphragm slot in a microfilm-r

Details Control device for controlling a diaphragm slot in a microfilm-r Control device for controlling a diaphragm slot in a microfilm-r

1985-04-01

1986-06-10

Hayes, Monroe H.

Photocopying

Projection printing and copying cameras

With focusing or projection screen

355 66, G03B 1328

Patent

active

045939900

ABSTRACT:
A device for controlling the width of a slot of a diaphragm of a microfilm-reading-and-copying apparatus in which an enlarged microimage is projected by two inclined mirrors mounted on a movable carriage and via the slot of the diaphragm on a copying cylinder. The diaphragm is formed by two flaps of which one is stationary and another one is movable between a closed position to close the slot and a plurality of open positions to adjust the width of the slot. The drive of the movable flap is provided with a rotatable cam which is coupled to the movable carriage.

REFERENCES:
patent: 3609037 (1971-09-01), Suzuki
patent: 3917393 (1975-11-01), Nier
patent: 4232960 (1980-11-01), Glab
patent: 4299480 (1981-11-01), Gilkeson

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