Method for restoring the operation of a yarn twist apparatus following a yarn break

Abstract

A method for restoring the operation of a twist apparatus which imparts a prescribed twist to a yarn following a break in the yarn as it travels between a twist spindle of the twist apparatus and a wind-up package of the twist apparatus includes drawing off a twist yarn end from the wind-up package, securing it at a fixed securement point with a portion thereof having an intact twist turn, and cutting the drawn off twist yarn end. The twist yarn end from the wind-up package with the spin yarn end of the yarn from the twist spindle are then knotted or spliced to one another. Thereafter, the re-commencing of the operation of the wind-up package is effected with a delay relative to the re-commencing of the twist spindle operation such that the prescribed twist has propagated through the knotting or splicing location to the fixed securement point.

What is claimed is:  
     
         1 . A method for restoring the operation of a twist apparatus which imparts a prescribed twist to a yarn following a break in the yarn as it travels between a twist spindle of the twist apparatus and a wind-up package of the twist apparatus, the method comprising: 
 drawing off a twist yarn end from the wind-up package;    securing the drawn off twist yarn end at a fixed securement point once the drawn off twist yarn end has been drawn off the wind-up package to an extent such that the drawn off twist yarn end comprises a portion with an intact twist turn;    cutting the drawn off twist yarn end at a cutting location selected such that a sufficient extent of the twist yarn end is available below the fixed securement point for subsequently interconnecting this twist yarn extent with a spin yarn end of the yarn from the twist spindle;    interconnecting the twist yarn end from the wind-up package with the spin yarn end of the yarn from the twist spindle by a selected one of knotting the yarn ends to one another and splicing the yarn ends to one another;    re-commencing the operation of the twist spindle; and    re-commencing the operation of the wind-up package in a time-delayed manner relative to the re-commencing of the operation of the twist spindle with the time delay being such that the prescribed twist which the completed twist yarn is to have has propagated through the location at which the yarn ends have been interconnected to one another to the fixed securement point.    
     
     
         2 . A method according to  claim 1 , and further comprising controlling the time-delayed re-commencement of the operation of the wind-up package, which occurs after the re-commencement of the operation of the twist spindle, via a control device.  
     
     
         3 . A method according to  claim 1 , wherein at least one of the spindle rotation per unit time, the twists per meter, and the high running time of the spindle is taken into account in setting the time-delayed re-commencement of the operation of the wind-up package.