System for testing paper money and the like

Details System for testing paper money and the like System for testing paper money and the like

1974-05-17

1976-01-06

Knowles, Allen N.

Classifying, separating, and assorting solids

Adhesion

With selective differentiation

209DIG2, 340259, 235 92SB, 235 6111K, B07B 115

Patent

active

039305821

ABSTRACT:
To test the genuineness and/or condition of dollar bills or other substantially identical papers, one or more thickness gauges are positioned in the path of these papers and determine the deviations, if any, of the thickness of a passing specimen from a predetermined value or from the thickness of a reference specimen scanned concurrently therewith. The measured deviations are fed into a processor which counts positive or negative deviations within a multiplicity of incremental periods and determines the nature of any irregularity from the count of deviations of either sign. With three gauges measuring thickness along as many parallel tracks, the system may discriminate among such irregularities as gaps, overlappings, adhesive tape and dog-eared corners.

REFERENCES:
patent: 3417476 (1968-12-01), Martens
patent: 3581402 (1971-06-01), London et al.
patent: 3590992 (1971-07-01), Soderstrom
patent: 3759095 (1973-09-01), Short, Jr.
patent: 3778051 (1973-12-01), Allen
patent: 3842668 (1974-10-01), Lippke

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