Powder coating apparatus
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United States of America Patent
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Nov 30, 1999
Grant Date -
N/A
app pub date -
Jan 16, 1997
filing date -
Jan 19, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In order to improve a powder coating arrangement for the application of melted coating powder onto a substrate, comprising a preparation unit for generating a flow of coating powder, a powder applicator head, from which the flow of coating powder issues and spreads in the form of a directed jet of powder towards the substrate, a melting zone, through which the flow of coating powder passes in a direction of passage, and an optical beam guidance system, which directs a laser beam generated by a laser onto the melting zone to melt the coating powder, such that the coating powder may be essentially completely melted before impact on the substrate, it is proposed that the melting zone is arranged in the powder applicator head, and that the optical beam guidance system is equipped with several elements for reflecting the laser beam, which permit the laser beam to pass several times through at least one heating zone for the flow of coating powder in the region of the melting zone transversely to the direction of passage.
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