GB424879A - Improvements in the manufacture of yarns containing staple fibre from continuous filaments - Google Patents

Abstract

424,879. Artificial staple fibre yarns. BRITISH CELANESE, Ltd., 22, Hanover Square, London, TAYLOR, W. I., HALE, F. C., and WOODRUFF, A. H., c/o British Celanese, Ltd., Spondon, near Derby. May 22, 1933, No. 5574/35. Divided out of 424,683. [Classes 120 (ii) and 120 (iii)] Yarn containing staple fibre is produced by causing a bundle of continuous filaments to pass between two surfaces one of which is a cutting surface moving at a speed different from that of the filaments, and the other is a stationary surface which presses the filaments against the cutting surface, whereby cutting is effected. The cutting surface is preferably the periphery of an abrasive roller, e.g. surfaced with emery or carborundum. The stationary pressing member may rest on the filaments by its own weight, or it may be pressed by spring, weight, or lever. Two stationary pressing members may be used with one cutting member. The filaments are drawn through the cutting means by a gripping roller which may be surfaced with rubber, leather or cork, together with a pressing roller which may be plain or fluted, of metal, synthetic resin, cellulose acetate or the like, or of rubber in a thin flexible metal casing; rollers having intermeshing grooves as described in Specification 410,805 may be used. The yarn may be passed more than once through the cutting apparatus. The filaments are supplied from one or more bobbins, and two or more bundles may be associated before treatment. The yarn may be wound in a cap or ring-spinning device into any shaped package for immediate subsequent use. If the yarn is to be subsequently unwound axially, it is preferably wound with a quick traverse on a bobbin having an upper flange which curves into the barrel. The yarn may be lubricated, e.g. between the gripping rollers and the collecting device, by passing it over a wick or roller, or by spraying. Filaments of different denier and characteristics may be contained in the bundle, or two or more yarns may be doubled continuously with cutting ; the cut yarn may be doubled with yarns of natural fibre ; or a light continuous thread may be fed directly to the gripping rollers and combined with the cut thread. The continuous filament yarn 1 passes between the abrasive roller 2 and a stationary member 5 suitably weighted and carried in a slotted bearing 6. The bundle is drawn over the abrasive roller by a pair of rollers 3, 4, of which the lower is fluted and the upper of rubber, the roller 4 being driven with a greater peripheral speed than the abrasive roller 2. Specifications 420,298, 424,752, and 424,830 also are referred to.