GB369940A - Improvements in or relating to the twisting and doubling of yarns, threads, or filaments - Google Patents

Abstract

369,940. Twisting and doubling yarns, threads, or filaments. BRITISH CELANESE, Ltd., 22, Hanover Square, London, and POOL, W., of British Celanese, Spondon, near Derby. Dec. 24, 1930, No. 38865. [Class 120 (ii).] Yarns, threads, or filaments are doubled by drawing a yarn or yarns from a supply package in a loop which is rotated around the package to twist the yarn, and associating with the twisted yarn a second thread drawn from a supply outside the twisting device which receives no substantial twist during the operation. A yarn 60, Fig. 4, 67, Fig. 3, is drawn from a bobbin on a platform 10 and passed through a flyer 27<1>, being thereby twisted, and is doubled with yarn 62, 65 from a bobbin 66, arranged outside the device, the yarn therefrom being led straight through the flyer 27, as shown in Fig. 4, or through the flyer 27, upwards and through the flyer 27<1> so as to join the yarn being twisted at the top of the flyer 27<1> and to be doubled therewith, as shown in Fig. 3, the latter arrangement imparting a doubling twist of more than one turn for each revolution of the device. The platform 10 may be maintained stationary or caused to rotate relatively to the flyers by gearing such as described in Specification 369,293. The thread may be collected by simple winding, or twisted and doubled with similar or other threads, for example by a ring spindle apparatus, or the thread may be wound at an intermittent rate by means such as described in Specification 358,585 to cause the degree of doubling to vary. Yarns of different materials or characteristics, for example cellulose acetate, wool, silk, cotton, or cellulosic artificial silk, may be doubled and, by adjustment of the tension, the structure may vary from a covering of one yarn by another to a spiral arrangement of one on the other or a close intermingling.