| 摘要 |
1,270,935. Spinning yarns. T.M.M. (RESEARCH) Ltd. 1 Aug., 1969 [16 Aug., 1968], No. 39281/68. Heading DIF. Yarn is formed in a continuous process whereby a sheet or strip of film of synthetic plastics material, e.g. polypropylene, is converted to staple fibres which are spun by an open-end spinning device. As shown, film F from roll 11 is divided by roller 38 and each strip is flattened, straightened and perhaps heated by passage through rollers 12, 13, 14, 15, then advanced by rollers 16, 17, across the pins 19 of a slitting roller 18, rotating at a different peripheral speed therefrom, so that subsequent stretching between pairs of rollers 21, 22, and 23, 24, produces staple fibres which are fed by rollers 25, 26 to the feed tube 27 of a spinning device 28 which forms yarn Y. The fibres may be opened by a beater between- or following the pairs of stretching rollers and/or a beater cylinder covered with saw-tooth wire may act on fibres emerging from rollers 25, 26, Fig. 3 (not shown) and prior to delivery to tube 27.
|
