Method and device for the optical monitoring of a running...

Details Method and device for the optical monitoring of a running... Method and device for the optical monitoring of a running...

2005-01-14

2009-06-23

Stafira, Michael P (Department: 2886)

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

C356S429000

Reexamination Certificate

active

07551284

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.

REFERENCES:
patent: 5835656 (1998-11-01), Oishi et al.
patent: 2005/0078306 (2005-04-01), Engels
patent: 0 643 294 (1995-03-01), None

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