Patent ID: 6289662
Filing Date: 2001-09-18
Classification: D01H

Abstract:
An apparatus for clamping an underwinding thread on a spindle of a ring-spinning machine and which comprises, below a cop fitted onto said spindle, an axially fixed clamping ring on said spindle, and an axially shiftable clamping sleeve on said spindle juxtaposed with said clamping ring, said clamping ring and said clamping sleeve having frustoconical clamping surfaces fitting one into another for engaging an underwinding thread between them upon axial shifting of said clamping sleeve toward said ring and releasing said underwinding thread upon axial shifting of said clamping sleeve away from said clamping ring, at least one of said surfaces being textured to effect increased retention of said underwinding thread upon clamping of said underwinding thread between said surfaces.