Importance

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Abstract

The apparatus for creating and checking correlation between negatives and prints in photographic laboratories comprises: means (3) for making each film (5,5',5') with a progressive number (4) written in machine-readable code, a reader (19) for said number (4) in the printing station, a processing circuit (8) for the read signal in order to provide a control key having a sequence related to said progressive numbering (4), a member (10) which forms the end-of-order marks (13) on the strip of prints (11), a member (9) which on the strip of prints (11) forms the cutting marks (12) and modifies those in positions corresponding with the end-of-order marks (13) in accordance with the sequence generated by said processing circuit (8), in the finishing station (1), a reader (19) for the number (4) which characterises each film (5,5',5'), in the finishing station (16), a reader (20) for the cutting marks (12) in positions corresponding with the end-of-order marks (13), a circuit (22,27) which during the cutting stage checks that the same sequence exists both in the processed signal provided by said reader (19) for the number (4) which characterises each film (5,5',5') and in the processed signal provided by said reader (20) for the cutting mark (12), and a sensor (28) for sensing non-correspondence of the two sequences.

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First Claim