Patent ID: 6817169
Filing Date: 2004-11-16
Classification: D01H

Abstract:
A service unit for restarting a spinning operation in work stations of an open-end spinning machine after replacement of a yarn cheese with an empty cheese-winding tube, wherein the spinning machine comprises multiple work stations, each work station having a spinning device for producing a yarn and a winding device for winding the yarn into a cheese, each winding device comprising a creel having spaced tube plates for supporting the cheese-winding tube, the service unit comprising an auxiliary yarn supply device for providing an auxiliary yarn for restarting the spinning operation after a replacement of a yarn cheese with an empty cheese-winding tube and a yarn moving device for fixing a new spinning yarn on the empty cheese-winding tube held in the creel of the winding device, the service unit having a tube plate opener operative for creating a slotted opening between one of the tube plates of the winding device and an adjacent end of the cheese-winding tube, the yarn moving device being arranged for movement from a resting position entraining the auxiliary yarn held by the auxiliary yarn supply device into the area of the winding device and for positioning in the slotted opening the spinning yarn connected to the auxiliary yarn after restarting the spinning operation, the tube plate opener being arranged for subsequently closing the slotted opening to clamp the spinning yarn, the service unit having a yarn cutting device for separating the spinning yarn from the auxiliary yarn and a storage device for intermediately storing the spinning yarn, wherein the yarn moving device comprises operating elements movable in a path having a component of motion axial with respect to an axis of rotation of the cheese-winding tube for producing a reserve yarn winding.