Monitoring for contaminants in textile product

Details Monitoring for contaminants in textile product Monitoring for contaminants in textile product

1986-04-03

1988-04-19

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

250226, 356430, G01N 2188, G01J 350

Patent

active

047391766

ABSTRACT:
A method of monitoring for contaminants in highly elongate textile product such as yarn includes diffusely applying light to the yarn and monitoring light reflected by the yarn. The yarn is drawn past a background therefor and light is diffusely applied to both the yarn and said background. The background is arranged so that the total amount of monitored light reflected from the yarn and the background is substantially independent of the dimensions and density of the yarn and of the distribution of constituents in the yarn. In this way, a prescribed change in the reflected light intensity indicates a selected contaminant or range of contaminants in the yarn. The background is conveniently provided by an elongate channel so as to be close behind and to each side of the yarn.

REFERENCES:
patent: 3019972 (1962-02-01), Strother
patent: 3044345 (1962-07-01), Schottler
patent: 3116621 (1964-01-01), Klein et al.
patent: 3264922 (1966-07-01), Peyer
patent: 3451756 (1969-06-01), Young
patent: 3971272 (1976-07-01), Felix
patent: 4011457 (1977-03-01), Wolf
patent: 4634280 (1987-01-01), Paulson, Jr.
"Dark Fibres and Their Economic Importance", Foulds et al., Wool Technology and Sheep Breeding, Jun./Jul., 1984.

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