Yarn inspection system

Details Yarn inspection system Yarn inspection system

1983-09-08

1988-12-20

Shoap, Allan N.

Measuring and testing

Sheet, woven fabric or fiber

Filament

28172, 28187, G01L 504

Patent

active

047918128

ABSTRACT:
A yarn inspection system which comprises a source of yarn, a defect detector and a take-up stand is provided with the following features. A yarn path extender is located between the detector and the take-up stand and comprises a plurality of rolls each having a yarn contacting surface finish of about 40 to 100 RMS; the longitudinal axes of the rolls are approximately parallel, and the rolls are positioned so that the yarn path about the rolls is sinuous. The take-up stand comprises at least two rolls, at least one of which is driven by a motor, with each of the rolls being positioned for contact with at least one other roll while the yarn passes therebetween when the system is operational. A switch, normally closed when the rolls are positioned for contact with a least one other roll, opens when the rolls are displaced to thereby stop the driving motor.

REFERENCES:
patent: 2206469 (1940-07-01), Peterson et al.
patent: 2636951 (1953-04-01), Fahringer
patent: 3058343 (1962-10-01), Hutchens et al.
patent: 3386145 (1968-06-01), Harris
patent: 3513966 (1970-05-01), Eckels
patent: 3793883 (1974-02-01), Goldfarb et al.
patent: 3827296 (1974-08-01), Hidaka
patent: 3902234 (1975-09-01), Fernandes
patent: 4010915 (1977-03-01), Strutz et al.
patent: 4039609 (1977-08-01), Thiel et al.
patent: 4094452 (1978-06-01), Makela

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