Vibratory/pneumatic powder coating apparatus and method
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United States of America Patent
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Oct 12, 1999
Issued Date -
N/A
app pub date -
May 1, 1998
filing date -
Aug 3, 1994
priority date (Note) -
Expired
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Abstract
A powder coating apparatus and method feeds fine powdered coating material such as thermoplastic type material to a succession of discrete articles passing by the apparatus which includes a vibratory feeder bowl and a spiral track for delivering a substantially constant supply of powder coating material to the articles, wherein the powdered coating material is mixed with a pressurized airstream that delivers the powdered coating material to the articles. A sensor is also used to regulate an amount of powdered coating material supplied to the auger to the vibratory feeder. The invention also provides a powder feed system that deposits an excess of powdered coating material than that required to form the coating and provides for recirculation of the powder not ultimately used to form the coating back to the powder feeding apparatus.
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