Catching ribbon having thread-engaging elements for catching and holding a thread on a thread support and slip-on ring provided with such catching ribbon

摘要

A catching ribbon for catching and holding a thread on a thread support, such as a thread wind-up bobbin rotating at high speed, is provided at its circumference with catching elements. These catching elements comprise thread engaging portions, such as hooks. The space between two thread engaging portions of two immediately adjacent catching elements are positioned to allow a single thread passage therebetween but precluding thread retro-movement. The catching elements comprise miniature pins provided with heads configured to form the thread engaging portions, such as semi-circular heads or anchor-like heads similar to kedge anchors. Catching elements with a single thread engaging portion, such as a single hook, also may be provided. Successive rows of the single-hook catching elements or successive rows of the double-hook catching elements may be arranged in staggered relationship. The projection of one row of such catching elements into the immediately adjacent row of staggered catching elements results in the formation of a continuous thread catching surface. The catching ribbon serves for reliably catching textile threads or filaments of all kinds during take-up at initiation of thread winding. The catching ribbon also permits easy cleaning and thus repeated use of a slip-on ring provided with the catching ribbon for use on the thread wind-up bobbin.