Ultrasonic spray apparatus to coat a substrate
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United States of America Patent
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Issued Date -
Oct 30, 2008
app pub date -
Apr 2, 2008
filing date -
Apr 30, 2007
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Field is ejected from a surface of an apparatus. The apparatus comprises a.) a power supply operating at a frequency; b.) a transducer, which upon being applied the power is made to vibrate with a first amplitude; c.) a vibrating nozzle, comprising the surface, which is acoustically coupled to the transducer, to transmit the transducer vibration to the surface with a second amplitude; and, d.) a control unit to control the power supply applied to the transducer. The fluid is delivered to the surface of the nozzle. During this time the control unit cycles the power applied to the transducer at the frequency between a low power level and a high power level. The fluid is ejected from the surface when the high power level (i.e., first power level) is applied to the transducer but not when the low power level (i.e., second power level) is applied to the transducer.
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