Method for coating surfaces of a powdered material by directing coating material into Coanda spiral flow of powdered material
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United States of America Patent
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Feb 23, 1993
Grant Date -
N/A
app pub date -
Sep 10, 1990
filing date -
Dec 28, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for coating surfaces of a powdered material includes forming a Coanda flow of a Coanda spiral flow of a powdered material by flowing the powdered material through a Coanda spiral flow forming passage or a Coanda flow forming passage by introducing a pressurized gas into the flow forming passage through a Coanda slit therearound, supplying the thus formed Coanda flow or Coanda spiral flow of powdered material into a further Coanda spiral flow forming passage, and atomizing a liquid coating material with a liquid gas and then directing the atomized liquid coating material into the Coanda flow or Coanda spiral flow of powdered material through a Coanda slit in the further Coanda spiral flow forming passage.
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