G - Physics – 03 – B
Patent
G - Physics
03
B
88/20
G03B 21/11 (2006.01) G03B 21/134 (2006.01) G03B 27/46 (2006.01)
Patent
CA 1284044
ABSTRACT OF THE DISCLOSURE 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, con- trol device for controlling the transporting device, a potentio- meter 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 potentio- meter the preselected values are turned on and/or turned off.
540794
Auer Josef
Hackenberg Hubert
Koopmann Adolf
Sylla Jurgen
Agfa-Gevaert Aktiengesellschaft
Auer Josef
Fetherstonhaugh & Co.
Hackenberg Hubert
Koopmann Adolf
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