Abstract: In a method for threading yarns of two supply bobbins positioned coaxially one atop the other in a two-for-one twisting spindle through at two-part hollow spindle axle and a yarn guide channel of a yarn storage disk with a compressed-air operated injection threading device, a first supply bobbin is inserted into a two-for-one twisting spindle. A free yarn end of a second supply bobbin is threaded from above through a yarn guide tube of the second supply bobbin. The free yarn end of the second supply bobbin and the free yarn end of the first supply bobbin are combined and guided into an inlet of a yarn guide tube of the first supply bobbin. The compressed-air operated threading device is actuated and the second supply bobbin is then inserted into the two-for-one twisting spindle on top of the first supply bobbin.

Abstract: A textile yarn processing machine has a plurality of spindle assemblies for processing of yarn. Each spindle assembly includes mechanisms for forming a balloon of yarn which rotates around a spindle assembly central axis as the yarn travels through the spindle assembly during processing and a balloon limiter device surrounding the rotating balloon of yarn and having a generally cylindrical inside surface for frictional contact with the rotating balloon of yarn to restrict the size thereof. Devices are provided which reduce frictional contact between the rotating balloon of yarn and the inside surface of the balloon limiter so as to avoid the necessity of the use of lubricators on the yarn.

Abstract: A textile yarn processing machine has a plurality of spindle assemblies for processing of yarn. Each spindle assembly includes mechanisms for forming a balloon of yarn which rotates around a spindle assembly central axis as the yarn travels through the spindle assembly during processing and a balloon limiter device surrounding the rotating balloon of yarn and having a generally cylindrical inside surface for frictional contact with the rotating balloon of yarn to restrict the size thereof. Devices are provided which reduce frictional contact between the rotating balloon of yarn and the inside surface of the balloon limiter so as to avoid the necessity of the use of lubricators on the yarn.