BigPatents India

In order to improve the running and sliding properties of the yarn during its further processing, in particular for machine- knitting and knitting, it is waxed during rewinding in bobbin winding machines by passing it along a paraffin body. When the paraffin body is used up without this being noticed, the unwaxed yarn can cause yarn breaks or even needle breakages, which leads to production errors or lost production. It is therefore proposed to monitor the slippage at the winding stations where, to prevent pattern windings, the drive of the friction drum is switched on and off at intervals in such a way, that acceleration phases with slippage between the friction drum and the bobbin and slippage- free run-out phase follow each other. if the slippage decreases in successive acceleration phases and remains at a low level, while the drive output of the friction drum remains unchanged, this is considered to be an outage of the paraffin application. (FIG. 1) No. of Pages :25 No. of Claims :8