Method and apparatus for detecting defects in a moving web

Details Method and apparatus for detecting defects in a moving web Method and apparatus for detecting defects in a moving web

1997-08-21

1999-09-07

Rosenberger, Richard A.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

C01N 2189

Patent

active

059495502

ABSTRACT:
A method and apparatus for detecting patches or areas of relatively high gloss on a moving web, and thereby associated wrinkles or other defects, and signalling the presence thereof comprises an analog and/or digital optical reflectivity sensor for sensing gloss on the surface of the moving web, a web marking device adjacent the edge of the moving web for marking the edge of the web with a dye, and a microcomputer for receiving the output signal from the sensor(s) and for controlling the operation of the marking device. The apparatus may also include a warning device such as a light or horn. The apparatus and method have particular applicability in association with paper web re-reeling equipment.

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"Omron Luster Sensor E-3X-NL", Omron Electronics, Inc., Schaumburg, IL, date unknown.
"Reyco's 3160 Edge Marking System marks the edge with up to six colors of FDA certified dye.", Reyco, Inc., Marietta, GA, date unknown.

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