Patent ID: 7752832
Filing Date: 2010-07-13
Classification: D02G

Abstract:
1. Apparatus for producing a yarn from one or more slivers, the apparatus including: a first reciprocating twisting stage including one or more twist rollers arranged to move reciprocally along the axis of rotation of the one or more twist rollers for simultaneously twisting said one or more slivers; a non-reciprocating roller for pressing a core filament into a respective one of said slivers as said filament and sliver are pressed against the non-reciprocating roller; a guide for passing a core filament and a respective one of said slivers against the non-reciprocating roller prior to the first reciprocating twisting stage; and a control system for controlling variation of one or both of (a) the rotational speed of the one or more twist rollers and (b) the speed of the one or more twist rollers along said axis of rotation, to vary the twist profile imparted to the yarn.