Method for threading a yarn delivered from a godet roller on a bobbin and an apparatus for effecting the same

In a process wherein a bobbin rotatably supported on and rotated by a winding apparatus may receive a yarn delivered to the bobbin via a godet roller, a method for threading the yarn on the bobbin, comprising the steps of:

• providing a godet roller having a circumferential yarn delivery zone and an adjacent circumferential yarn threading zone axially spaced from said yarn delivery zone, disposed so that said yarn may be delivered to and taken up by said bobbin via said yarn delivery zone of said godet roller, said yarn delivery zone having a surface for substantially preventing circumferential and axial slippage of said yarn thereon;
• thereafter providing relative axial movement between said yarn and said godet roller, so that said yarn engages only the yarn threading zone of the godet roller, said yarn threading zone presenting (i) a relatively low friction surface to permit slippage of said yarn in the circumferential direction of the godet roller when the yarn tension exceeds a given value, and (ii) a relatively high friction surface to resist slippage of said yarn in the axial direction of the godet roller;
• engaging the free end of the yarn traversing the yarn threading zone of the godet roller with said bobbin, so that said free end is caught thereby;
• and
• subsequently providing relative axial movement between said yarn and said godet roller, so that said yarn again engages only the yarn delivery zone of the roller, whereby any change in tension in said yarn while said yarn is threaded on said bobbin can be distributed in yarn located upstream and downstream of said godet roller and entanglement of said yarn around said godet roller is prevented.