Rotary powder feed through apparatus
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United States of America Patent
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Oct 23, 2001
Grant Date -
N/A
app pub date -
Mar 3, 2000
filing date -
Apr 29, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A device for increasing the uniformity of solids within a solids fabrication system, such as a direct light fabrication (DLF) system in which gas entrained powders are passed through the focal point of a moving high-power light which fuses the particles in the powder to a surface being built up in layers. The invention provides a feed through interface wherein gas entrained powders input from stationary input lines are coupled to a rotating head of the fabrication system. The invention eliminates the need to provide additional slack in the feed lines to accommodate head rotation, and therefore reduces feed line bending movements which induce non-uniform feeding of gas entrained powder to a rotating head.
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