Method and apparatus for threading-up yarn in a pulsating manner

A thread feeding system comprising:

• at least one thread regulator having a fixed housing;
• a hollow tubular shaft extending through the fixed housing, the shaft being rotatable around a longitudinal central axis of the housing;
• a rotatable winding section positioned coaxially adjacent a downstream end of the fixed housing and secured to the rotatable shaft;
• a thread duct extending through the thread regulator, the thread duct having a first duct portion extending through the tubular shart, a second duct portion extending through the winding section at an angle with respect to the first duct portion, and an angled duct portion coupling the first duct portion to the second duct portion;
• an inlet positioned at an upstream end of the first duct portion;
• and a plurality of ejectors positioned within the duct portions, the ejectors supplying a working medium from a pressurized working medium source to the duct portions to facilitate threading of a thread through the thread duct, the inlet receiving a free end of the thread from a thread spool assembly disposed upstream from the thread regulator;
• control means for controlling the ejectors so that the ejectors generate a pressure proximate to the inlet to develop a flow of the working medium into the inlet;
• and
• pulsating means for feeding the thread through the thread regulator in a pulsating manner to insure that the free end of the thread passes unobstructed through the thread duct.