APPARATUS AND METHOD FOR DISPENSING POWDERS
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United States of America Patent
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Issued Date -
Jun 14, 2012
app pub date -
Aug 18, 2010
filing date -
Aug 19, 2009
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Apparatus for dispensing a powder, comprises a dispensing nozzle having an upper portion for containing a quantity of the powder, having a minimum internal horizontal dimension of 5 mm, and a dispensing orifice below the upper portion, with a maximum internal horizontal dimension of from 200 μm to 3 mm. An internal passage leading from the said upper portion to the dispensing orifice tapers in a linear manner from its upper end to its lower end. The apparatus includes a transducer for applying vibrational pulses to the dispensing nozzle, to dispense doses of powder from the orifice. Vibrational pulses are controlled to control flow of powder through the nozzle.
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