Side printing apparatus

Details Side printing apparatus Side printing apparatus

1983-11-28

1985-10-22

Wintercorn, Richard A.

Photocopying

Projection printing and copying cameras

Original moves continuously

352 92, 355 64, G03B 2748, G03B 2750

Patent

active

045484929

ABSTRACT:
A side printing apparatus for providing on a continuously moving film latent images of characters, numerals, symbols and the like which are later photographically developed. The light image forming arrangement is deenergized so as to prevent the provision of such light images at least during the movement of the film in a reverse direction for preventing double exposure of the film. The deenergization of the light image forming arrangement is caused by a direction discriminator for discriminating the movement of the film in the forward and reverse directions in conformity with two series of pulse signals with a phase difference of 90.degree. therebetween from a rotary encoder rotating in synchronism with the movement of the film.

REFERENCES:
patent: 3888780 (1975-06-01), Tucker

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