Methods of measuring currency limpness
AssigneeCurrency Systems International
InventorSohail Kayani
Life of this patent
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Abstract
Measuring the limpness of a note is necessary to separate a worn note out of circulation. Several methods are disclosed which can be used either alone or in combination to test for limpness. One method measures the note's ability to reflect light or transmit the light. Another method measures the response of the note to an acoustic wave. Another method measures the note's deflection to a pressure or force. Yet another method measures the dielectric value of the note when placed between the plates of a capacitor. A final method involves measuring the thermal conductivity of the note. In each case, a limp note will produce distinguishable results from a stiff note.
Claims8
A method of measuring the limpness of a note comprising the steps of:
- (a) emitting an acoustic wave so that the wave is incident on the note;
- (b) measuring a portion of the acoustic wave off the note;
- and,
- (c) correlating the difference between the emitted acoustic wave and the measured acoustic wave reflected off the note to a limpness value.
A method of measuring the limpness of a note comprising the steps of:
- (a) emitting an acoustic wave so that the wave is incident on the note;
- (b) measuring a portion of the acoustic wave reflected off the note;
- and,
- (c) determining the limpness of the note from the measured portion of the acoustic wave at one or more locations on the note.
A method of measuring the limpness of a note comprising the steps of:
- (a) emitting an acoustic wave so that the wave is incident on the note:
- (b) measuring a portion of the acoustic wave reflected off the note;
- and,
- (c) determining the limpness of the note from the measured portion of the acoustic wave along with a second method for determining currency limpness to determine a limpness value.
Dependencies are inferred from the claim text.