Method and device for the optical monitoring of a running fiber strand
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United States of America Patent
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Jun 23, 2009
Grant Date -
Jan 1, 2009
app pub date -
Jan 14, 2005
filing date -
Jan 15, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Disclosed are a method and a device for optically monitoring a running natural fiber strand. According to the invention, a light signal is sent onto the fiber strand and is emitted once again at a different point of the fiber strand surface, is received by a detector, and is evaluated so as to determine a foreign matter, thereby allowing light-guiding foreign matters to be distinguished from the non-light-guiding natural fibers.
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