Device for singling out non-reproducible copies fed in a photogr

Details Device for singling out non-reproducible copies fed in a photogr Device for singling out non-reproducible copies fed in a photogr

1982-05-10

1984-07-10

Gellner, Michael L.

Photocopying

Projection printing and copying cameras

Illumination systems or details

G03B 2780

Patent

active

044590180

ABSTRACT:
A device for use in connection with an electronically controlled photographic printer is described which singles out from an advancing band of original copies those which are unsuitable for reproduction. The device includes a splice sensor for indicating the end or the beginning of an order, a sensor of individual pictures in each order, and a quality (sharpness) sensor. A resettable counter is connected to the splice sensor and to the picture scanner to produce an output pulse after a predetermined number of pictures or after the beginning or end of the order. The output pulse is applied to a selection logic circuit which has adjustable sensitivity levels. The selection logic circuit is controlled by the quality sensor to produce a "print" or "non-print" output pulse applied to the printer-controlling electronics. The output pulse from the counter is controlled by switching means to adjust the sensitivity level in the selection logic circuit so as to either ignore the signals from the quality sensor or to adjust the selection circuit to a lower sensitivity for responding to the quality signals.

REFERENCES:
patent: 4251157 (1981-02-01), Knor et al.
patent: 4379632 (1983-04-01), Dedden et al.

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