APPARATUS AND METHOD FOR DOFFING SOUND PACKAGES AND DONNING EMPTY CORES

摘要

Improvements in yarn processing apparatus and the like, which continuously advance yarn and have at least one arm device for mounting bobbin tubes around which the advancing yarn is wound to form bobbins, tube supply devices to maintain available quantities of empty tubes, an oscillating shaft device to drive said arm devices from a winding position to a coil withdrawal position and to a tube reset position, and to return them to the winding position, devices arm actuators cooperating with said arm devices to withdraw a coil moved by said arm devices towards the coil withdrawal position and to capture an empty tube from said tube supply devices in the tube reset position, devices cutters to separate a bobbin, which is being removed, from the thread qu e advances and to form a line, which runs free, of thread that advances, and control devices to command the line, which runs free, of thread that advances during the removal of the coil and the replacement of the empty tube, characterized by a improved arrangement that facilitates the replacement of empty tubes (103, 158) and that is operatively coupled with said shaft device (102) to drive said shaft device (102) in predetermined oscillation and to move said device (101a, 101b) from arms at a first speed from the winding position to the coil withdrawal position and then to the empty tube replacement position and, after decreasing the movement speed of said arm device (101a, 101b) in order to facilitating the replacement of an empty tube, to return said arm device to said winding position. (Machine-translation by Google Translate, not legally binding)