Apparatus for determining the span length of a laterally dispersed array of fibers

Abstract

Abstract AS DESCRIBED HEREIN, A GEOMETRIC FIBROGRAPH IS PROVIDED WHICH DETERMINES THE DISTANCES SPANNED BY 50 PERCENT AND 2.5 PERCENT OF A SAMPLE OF FIBERS TO BE USED IN MAKING YARN. THIS IS ACCOMPLISHED BY ILLUMINATING THE BASE OF A LATERALLY DISPERSED ARRAY OF FIBERS AT AN ANGLE WHICH IS NORMAL TO THE LONGITUDINAL AZIS OF THE FIBERS AND MEASURING THE AMOUNT OF LIGHT TRANSMITTED THROUGH THE BASE OF THE FIBERS TO PROVIDE AN INDICATION OF THE 100 PERCENT SPAN DISTANCE. THEREAFTER, THE FIBER ARRAY IS SCANNED IN A TRANSVERSE DIRECTION BY LIGHT RAYS WHICH ILLUMINATE THE FIBER ARRAY AT ANGLES IN A HORIZONTAL PLANE OF 30 DEGREES AND APPROXIMATELY 1.5 DEGREES, RESPECTIVELY, AND MEASUREMENTS TAKEN OF THE AMOUNT OF LIGHT TRANSMITTED THROUGH THE SAMPLE. THE FIBER SAMPLE IS SCANNED IN THE DIRECTION PARALLEL TO THE FIBERS UNTIL THE INTENSITY OF THE LIGHT INTERCEPTED BY THE SAMPLE AT THE ANGLES OF 30 DEGREES AND 1.5 DEGREES, RESPECTIVELY, EQUALS THE INTENSITY OF LIGHT INTERCEPTED BY THE FIBER SAMPLE AT THE BASE THEREOF. AT THIS POINT, THE DISPLACEMENT IN THE DIRECTION PARALLEL TO THE FIBERS BETWEEN THE BASE OF THE SAMPLE AND THOSE PORTIONS OF THE SAMPLE PROVIDING THE SAME APPARENT FIBER DENSITY AT 30 DEGREES AND 1.5 DEGREES IS MEASURED TO PROVIDE AN ACCURATE INDICATION OF THE 50 PERCENT SPAN LENGTHS.

Inventors

• 👤 Kenneth L Hertel

Bibliographic Details