Methods of measuring currency limpness
AssigneeCurrency Systems International
InventorSohail Kayani
Life of this patent
Estimating the term…
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.
Claims18
A method of measuring the limpness of a note comprising the steps of:
- (a) emitting a light so it is incident on the note;
- (b) measuring an amount of the light reflected off of the note;
- and,
- (c) determining the limpness of the note from the measured portion of the reflected light.
A method of measuring the limpness of a note comprising the steps of:
- (a) emitting a light so it is incident on the note;
- (b) measuring an amount of the light transmitted through the note;
- and,
- (c) determining the limpness of the note from the measured portion of the transmitted light.
An apparatus for determining the limpness of a note, said apparatus comprising:
- (a) a light emitting source positioned to emit light on the note under test;
- (b) a light measuring device positioned to detect the light emitted from the light emitting source after said light has interacted with said note;
- and,
- (c) means coupled to said light measuring device to correlate the detected light with the limpness of said note under test.
Dependencies are inferred from the claim text.