Monitoring systems

Details Monitoring systems Monitoring systems

1978-01-03

1980-01-22

Corbin, John K.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250572, G01B 1130

Patent

active

041847709

ABSTRACT:
A monitoring system for detecting the presence of folds, creases, etc., in the surface of a moving web of material such as paper. The system utilizes a laser light beam arranged parallel to the surface of the web and transversely to the direction of movement thereof. A light detector such as a differential photo electric detector senses changes in the light beam caused by impingement on a fold or crease.

REFERENCES:
patent: 3072012 (1963-01-01), Pandell et al.
patent: 3105152 (1963-09-01), Nash
patent: 3588513 (1971-06-01), Aramatsu et al.
patent: 3841761 (1974-10-01), Selgin
patent: 3877814 (1975-04-01), Hess et al.
patent: 3992111 (1976-11-01), Roulier et al.
patent: 4021119 (1977-05-01), Stauffer

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