Coating apparatus for applying a UV curable resin to a threaded end of a steel pipe
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United States of America Patent
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Dec 8, 2015
Grant Date -
Sep 5, 2013
app pub date -
Aug 29, 2011
filing date -
Aug 31, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A coating apparatus for forming a thin UV curable resin coating on threaded end portions of a steel pipe comprises a spraying unit having at least two nozzles adapted to spray the resin coating composition by pneumatic atomization toward the threaded end portion of the steel pipe, a resin supply system for supplying the resin coating composition to each nozzle, and a first nozzle support means which supports each nozzle for movement in the axial direction of the steel pipe and in the vertical direction. The two nozzles are disposed at different positions at least in the axial direction of the steel pipe at angles which are sloped such that the sprayed streams from the nozzles approach each other. The resin supply system has a regulator for maintaining the spraying air pressure of the resin coating composition in each nozzle of the spraying unit at a predetermined respective value.
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