Open-end rotor spinning unit for producing effect yarns by variable sliver feed includes longitudinal recesses in feed roller or feed pedal

摘要

Variable sliver feed rate to produce effects (26) in the yarn (5) is provided by recesses in the feed roller (8), the feed pedal (9) or the sliver support (12). The recesses are in the form of grooves running in the direction of fiber feed (A). The grooves preferably start ahead of the nip region (27) and finish downstream of it.