Patent ID: 6363705
Filing Date: 2002-04-02
Classification: D01H

Abstract:
A method for spinning fibers onto the free ends of the two threads of a yarn that is produced during an integrated spinning and twisting process performed by a two-for-one spinning and twisting apparatus having a yarn guide channel, a spindle hollow axle, a spindle rotor disc, and a pair of spinning rotors, the method comprising:threading a twisted yarn end, in a direction opposite to the travel direction of the twisted yarn end during the twisting operation, through a yarn guide channel of a spindle rotor disc and thereafter through the spindle hollow axle until an extent of the twisted yarn end extends beyond the inlet upper end of the spindle hollow axle with its twist substantially unreleased; gripping the twisted yarn at a location thereon below the extent of the twisted yarn end which extends beyond the inlet upper end of the spindle hollow axle; in the extent of the twisted yarn above the gripped location, separating from one another into parallel extending portions the two threads of the twisted yarn in a manner such that the twist which was originally present in each individual thread prior to the doubling of the thread with the other thread returns to the now separated thread portion; forming a thread loop of each separated thread portion in the area between the inlet upper end of the spindle hollow axle and a respective one of the spinning rotors; clamping each thread loop in a clamping device such that the trough of the thread loop is clamped and respective portions of the two branches of the thread loop extending from the trough are clamped in parallel relation to one another; disposing a first branch of each thread loop into the respective spinning rotor while a second branch of the thread loop extends into the spindle hollow axle; commencing the winding operation such that the second branch of each respective thread loop is drawn further into the spindle hollow axle; and commencing spinning of fiber material in the pair of spinning rotors in correspondence with the dissolution of the thread loops due to the further drawing in of the second thread loop branches into the spindle hollow axle, whereby those free ends of the threads in the spinning rotors which were formerly the first branches of the thread loops and the spun fibers which have been joined therewith by the spinning operation are drawn into the spindle hollow axle and are thereafter followed by spun yarn produced by the spinning rotors, and twist is imparted to the thus formed yarn by the two-for-one spinning and twisting apparatus.