QUANTITATIVE SUCTION AMOUNT WEIGHING METHOD AND APPARATUS

PURPOSE:To obtain control data on-line within a short time by a method wherein the suction of the end part of running yarn on a supply side thereof is started simultaneously with the cutting of said yarn and, after the elapse of a predetermined time, the yarn is again cut to secure the yarn having a definite length and the wt. thereof is measured to be converted to fiber fineness data to output said data. CONSTITUTION:Running filament yarn 1 is cut by the first cutter 65a and a definite amount of said yarn is sucked by the first sucker 63 to be again cut by the second cutter 62b while the cut yarn is sent to the wt. measuring apparatus 73 of a weighing processing part 7 through a suction conduit 8 to be successively measured. The measured value is converted to fiber fineness control data by an operation apparatus 74 to be displayed. By this method, the control data of the running filament yarn can be obtained on-line within a short time.