Method and apparatus for testing a forward-moving strand

Details Method and apparatus for testing a forward-moving strand Method and apparatus for testing a forward-moving strand

1978-06-21

1980-07-15

Corbin, John K.

Optics: measuring and testing

By monitoring of webs or thread

For flaws or imperfections

250572, G01D 2104

Patent

active

042125413

ABSTRACT:
In a method for testing a continuously forward-moving strand a light beam which passes along a plane that extends approximately perpendicularly to the longitudinal axis of the strand is introduced into the strand. The brightness value is measured on a place of the strand exterior which is distal from the light incidence place by means of at least one photoelectronic element disposed directly on the strand exterior and the measured result is evaluated in a gating circuit which is electrically connected to the photoelectronic element.

REFERENCES:
patent: 4001579 (1977-01-01), Lebet et al.

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