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 a limpness of a note comprising the steps of:
- (a) capturing the note between a capacitor's plates;
- (b) measuring the capacitor's value;
- and
- (c) determining the limpness of said note from the measured capacitor's value.
An apparatus for determining the limpness of a note, said apparatus comprising:
- (a) two opposed plates forming a capacitor;
- (b) a capacitance measuring device electrically connected to said capacitor;
- and
- (c) means connected to said capacitance measuring device for determining the limpness of the note under test from the capacitance measured by said capacitance measuring device when said note is between said capacitor plates.
Dependencies are inferred from the claim text.