Patent ID: 6610176
Filing Date: 2003-08-26
Classification: D02G,D21F,Y10S,Y10T

Abstract:
A method of forming a yarn comprising at least four filaments of a desired material wrapped about one another, comprising the steps of:providing a like number of spools of filaments of said material, said spools having hollow tubular cores; arranging said spools in a series along a forming line, with their axes aligned generally along said line, and with successive spools oriented oppositely to one another with respect to the direction of winding of said filaments thereon; drawing a first central twisting carrier of diameter similar to said filaments through the hollow cores of each of said spools in said series; drawing the filaments of said material endwise off each spool in said series in turn, and drawing each filament together with said central twisting carrier and the filaments drawn from the spools earlier in said series through the hollow cores of each of the spools later in said series, such that a yarn precursor comprising said central twisting carrier and said filaments drawn from the spools earlier in said series is successively wrapped in opposite directions by a further filament as the yarn precursor is drawn through the hollow core of each spool in said series, forming a yarn; and collecting said yarn for weaving into a fabric; wherein said spools are maintained static during said step of drawing the filaments of said material endwise off said spool, whereby the pitch by which a given filament is wrapped around the yarn precusor comprising the central twisting carrier and the filaments drawn from the spools earlier in said series is proportional to the circumference of wrapped filament material on the spool from which said given filament is drawn.