Patent ID: 6375882
Filing Date: 2002-04-23
Classification: D01D,D01F

Abstract:
A process for making a first and a second plurality of fully oriented multifilament yarns on a fully oriented yarn spinning machine, comprising:spinning a plurality of filaments from a spin pack containing a spinneret plate; cooling the filaments in a quench chimney; applying finish on the filaments and converging the filaments into a first and a second plurality of multifilament yarns; drawing the first plurality of the multifilament yarns with a first unheated rotatable stepped feed and draw roll assembly and drawing the second plurality of the multifilament yarns with a second unheated rotatable stepped feed and roll assembly to increase their length by a fixed amount; heating said multifilament yarns from the unheated rotatable stepped feed and draw roll assemblies by applying steam to said multifilament yarns from a steam relax unit between the first and the second heated rotatable stepped feed and draw roll assemblies; maintaining a separation of the yarns; and winding the first and the second plurality of the multifilament yarns on a first and a second windup assembly into a first and a second plurality of packages.