METHOD FOR DETERMINING TORQUE OF TWISTED FIBER AND YARN Russian patent published in 2004 - IPC

FIELD: textile industry, in particular, equipment for controlling and optimizing of twisted fiber and yarn. SUBSTANCE: method involves placing fiber or yarn sample under test in horizontal position and rigidly fixing its fastened end or disposing it for axial rotation; joining free end of sample under test with auxiliary sample of elongate thread-like material having thickness close to that of sample under test and strength exceeding that of sample under test, with sample under test being balanced for twisting or without twisting; providing single applying of force or successively changing force value; connecting sample under test and auxiliary sample through sensitive member and judging torque value on the basis of sensitive member signals. Method allows torque with different axial loading and twisting to be measured upon single testing procedure, as well as several fiber cuts to be tested simultaneously with following neutralizing of results. Also, flexible torque relaxing value may be measured and thread may be optimized on the basis of torque value. EFFECT: increased efficiency by increased precision of fiber or yarn torque measurement. 1 dwg, 10 ex