Method and apparatus for measuring irregularities in the cross-s

Measuring and testing – Sheet – woven fabric or fiber – Filament

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364470, 364563, 364552, G01N 3336

Patent

active

040517225

ABSTRACT:
A method of, and apparatus for, measuring irregularities in the cross-section of yarns, rovings, bands and the like, by means of a preferably portable measuring apparatus or device providing a direct read-out or display and containing a measuring element, amplifying- and signal converting circuitry as well as an indicator or display device. A measuring signal derived from a yarn irregularity signal is checked with respect to the number of times it passes through at least one given reference value or hysteresis range, and the indicated value for the irregularity constitutes a statistically certain or significant value whenever the number of passes through the reference value or hysteresis range has reached at least a predetermined value.

REFERENCES:
patent: 2671199 (1954-03-01), Truit
patent: 3303698 (1967-02-01), Loepfe
patent: 4007457 (1977-02-01), Aeppli

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