Method and apparatus to determine folding deviations

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73159, 493 23, 493 37, 493417, B31B 4900, B31F 100

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active

045780528

ABSTRACT:
In a method and an apparatus to test folded sheets for folding deviations from the reference folding line, to be used in pocket folding - or cutting folding machines, markings are made on the folding material, corresponding with the print format, and are sensed by sensors, preferably electro-optical reflection sensors after the material has been folded inside the machine, to obtain the position information. The evaluation position information derived from the output of the sensors for a number of folded sheets is rigid to determine the adjustments of the machine necessary to correct the deviations.

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