System and method for measurement of traveling webs

Details System and method for measurement of traveling webs System and method for measurement of traveling webs

1987-04-03

1988-11-22

Westin, Edward P.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250339, 356429, G01N 2131

Patent

active

047868171

ABSTRACT:
A system and method for optically measuring parameters including dry basis weight, basis weight and moisture content of fibrous sheet materials during manufacture without scanning. The system includes means for reflecting modulated light as parallel rays perpendicularly incident upon one surface of a traveling web, and means to detect light transmitted through the web at least at four distinct bands of wavelengths.

REFERENCES:
patent: 3655980 (1972-04-01), Bossen
patent: 3806730 (1974-04-01), Tirkkonen et al.
patent: 3965356 (1976-06-01), Howarth
patent: 4006358 (1977-02-01), Howarth
patent: 4300049 (1981-10-01), Sturm
patent: 4577104 (1986-03-01), Sturm

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