Process and apparatus for measuring the degree of filament inter

Details Process and apparatus for measuring the degree of filament inter Process and apparatus for measuring the degree of filament inter

1991-06-13

1992-08-25

Cuchlinski, Jr., William A.

Measuring and testing

Sheet, woven fabric or fiber

Filament

73159, 356429, 356238, 250559, 250571, G01N 2186

Patent

active

051408520

ABSTRACT:
There are described a process and apparatus for measuring the degree of filament intermingling of an intermingled multifilament yarn. The intermingled yarn is moved through a self-conveying fluid jet (air jet). The yarn substantially fills out the jet channel and emerges from the jet in a virtually tensionless state. Owing to the pressure difference at the jet outlet, noncohesive yarn zones expand explosively in the manner of a balloon. After expansion, the yarn passes before a sensor means, preferably an electronic camera, which detects the lightness differences or light diffraction phenomena due to the yarn filaments and sends as a function thereof a signal to a signal processing means. The method of measurement of the invention makes it possible to obtain very accurate information about the nature of the intermingling (spot type or continuous) and also about the geometry of intermingling (for example number and spacing of intermingling nodes in the case of spot type intermingling).

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patent: 4990793 (1991-02-01), Bonigk et al.
"Interlace Measuring Instrument," Research Disclosure, No. 156, p. 18 (Apr. 1977).

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