Collar, system and method for detecting a mark on a rod

Details Collar, system and method for detecting a mark on a rod Collar, system and method for detecting a mark on a rod

2006-04-25

2008-12-23

Sohn, Seung C (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

With circuit for evaluating a web, strand, strip, or sheet

C250S231100, C091S001000, C092S00500L

Reexamination Certificate

active

07468522

ABSTRACT:
A collar, a system and a method detect a mark on a rod within an interior of the collar. The mark and the rod move from a first position to a second position within an interior of the collar between a first end and a second end of the collar. A light emitter and/or a light detector is connected to the collar for determining the first position and/or the second position of the mark and/or of the rod within the interior of the collar. An exterior surface of the rod and/or a mark on the rod absorb an amount of light emitted from the light emitter within the interior of the collar. The light detector measures and/or detects an intensity of light within the interior of the collar which is not be absorbed by the mark and/or by the exterior surface of the rod. The intensity of light within the interior of the collar detected by the light detector that is not absorbed by the mark or the exterior surface of the rod corresponds to the first position and/or to the second position of the mark within the interior of the collar.

REFERENCES:
patent: 4661695 (1987-04-01), Mori et al.
patent: 4806707 (1989-02-01), Landmeier
patent: 4902903 (1990-02-01), Segerson et al.
patent: 5182979 (1993-02-01), Morgan
patent: 5744705 (1998-04-01), Derouen et al.
patent: 6600144 (2003-07-01), Matthies
patent: 6952009 (2005-10-01), Engstrand

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