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    • 8. 发明授权
    • Method and apparatus for imparting false twist to yarn before ring spinning
    • 在环锭纺纱前对纱线进行假捻的方法和装置
    • US08549830B1
    • 2013-10-08
    • US13747679
    • 2013-01-23
    • The Hong Kong Polytechnic University
    • Xiao Ming TaoBin Gang XuTao HuaJie FengHeng GuoYunhui Jia
    • D01H7/52D01H1/11
    • D01H7/92D01H1/02D01H7/926
    • A method and apparatus for imparting false twist to a short staple yarn delivered from a nip of a pair of front drafting rollers before ring spinning. Downstream of the nip, the twisted yarn is drawn sequentially across first and second runs of travelling endless belts, such that the yarn wraps about a first convex surface of the first run, then passes between the first and second runs, before wrapping about a second convex surface of the second run. Friction between each of the first and second convex surfaces and the yarn imparts the false twist in a common direction. Maintaining a differential between first and second linear speeds of the first and second runs, respectively, has been found to reduce yarn defects, particularly the nep count.
    • 一种用于在旋转纺纱之前对从一对前牵伸辊的辊隙输送的短纤维纱进行假捻的方法和装置。 在辊隙的下游,加捻纱线依次穿过第一和第二行进的环形带,使得纱线围绕第一次运行的第一凸起表面包裹,然后在第一次和第二次运行之前通过,然后再缠绕第二次 凸表面的第二次运行。 第一和第二凸表面和纱线中的每一个之间的摩擦在共同的方向上产生假捻。 已经发现分别维持第一次和第二次运行的第一和第二线速度之间的差异来减少纱线缺陷,特别是棉点计数。