Apparatus for sorting sheets according to their patterns

Details Apparatus for sorting sheets according to their patterns Apparatus for sorting sheets according to their patterns

1982-11-02

1985-09-24

Reeves, Robert B.

Classifying, separating, and assorting solids

Sorting special items, and certain methods and apparatus for...

Sorting paper money

356 71, 356394, 382 7, B07C 5342, G06K 900

Patent

active

045428298

ABSTRACT:
Apparatus for sorting banknotes in accordance with the printed patterns on their surfaces comprises: an illumination source (S) for illuminating the banknote; a scanning device (1), for example an array of photodetectors, for collecting light from a plurality of illuminated pixels of the pattern; a moving device for moving the banknote relative to the scanning device; and an analogue-to-digital converter (6) responsive to signals from the scanning device representative of the intensity of light from each pixel, to produce intensity signals in digital form; a digital memory (7) for storing the digital signals; digital correlator device (8, 10) for correlating the stored signals with a previously-stored set of signals representative of a set of standard patterns, the correlation being performed pixel by pixel; and a sorting device, responsive to the result of the correlation to divert the banknote in accordance with the most likely match.

REFERENCES:
patent: 3360653 (1967-12-01), Phares
patent: 3496371 (1970-02-01), Endo
patent: 3872434 (1975-03-01), Duvall et al.
patent: 3930581 (1976-01-01), Gray
patent: 4131879 (1978-12-01), Ehrat
patent: 4179685 (1979-12-01), O'Maley
patent: 4186378 (1980-01-01), Moulton
patent: 4288781 (1981-09-01), Sellner et al.
patent: 4298807 (1981-11-01), Favre
patent: 4348656 (1982-09-01), Gorgone et al.

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