Measuring and testing – Vibration – Resonance – frequency – or amplitude study
Patent
1998-03-25
2000-08-15
Williams, Hezron
Measuring and testing
Vibration
Resonance, frequency, or amplitude study
G01H 100
Patent
active
061018805
ABSTRACT:
A method is disclosed for advantageously modifying the texture or character of a plastic work material by applying acoustic energy at the work material's natural resonant frequency via a transducer assembly including vibrating the transducer assembly in air to determine the natural resonant frequency of the transducer assembly; determining the natural resonant frequency of the work material and the transducer assembly together; subtracting the natural resonant frequency of the transducer assembly from the natural resonant frequency of the work material and the transducer assembly together to determine the natural frequency of the work material; and applying acoustic energy to the work material at the determined natural frequency of the work material. The transducer assembly includes piezoelectric actuators which provide the acoustic energy.
REFERENCES:
patent: 5520862 (1996-05-01), Face, Jr. et al.
patent: 5527175 (1996-06-01), Face, Jr. et al.
patent: 5814232 (1998-09-01), Face, Jr. et al.
Bishop Richard P.
Face, Jr. Samuel A
Rogers Glenn F.
Clark Stephen E.
Face International Corp.
Kwok Helen C.
Williams Hezron
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