Photocopying – Projection printing and copying cameras – With focusing or projection screen
Patent
1987-06-22
1988-06-28
Wintercorn, Richard A.
Photocopying
Projection printing and copying cameras
With focusing or projection screen
355 5, 355 49, G03B 1328
Patent
active
047543060
ABSTRACT:
A microfilm reading and reverse enlarging apparatus with a copying beam for a gap illumination comprises a copy carrier movable with a constant speed, drive device for moving the copy carrier, a film platform for a film and adjustable relative to an illuminating beam, transporting device for reciprocating the film platform synchronously with the movement of the copy carrier, control device for controlling the transporting device, a potentiometer adjustable by the transporting device synchronously with the movement of the platform so as to produce respective values in response to the movement of the platform during a copying process of successive microimages, and storing and comparing device arranged to store preselected values and to receive the values of the potentiometer to compare them with the preselected values, the storing and comparing device being connected with the control device so that the transporting device and the drive device for the copy carrier during reaching by the values of the potentiometer the preselected values are turned on and/or turned off.
REFERENCES:
patent: 4593990 (1986-06-01), Auer et al.
patent: 4648707 (1987-03-01), Tanasescu
patent: 4666284 (1987-05-01), Yamada
patent: 4708463 (1987-11-01), Kondoh et al.
Auer Josef
Hackenberg Hubert
Koopmann Adolf
Sylla Jurgen
Agfa-Gevaert AG
Striker Michael J.
Wintercorn Richard A.
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