Process of spiral yarn

A spiral yarn, having plural spun yarns or rovings helically surrounding acore yarn, part of constituent short fibers of the rovings or spun yarns in an opened stateconstituting loops or fluffs and protruding to the surfaces of the rovings or spun yarns. The loops or fluffs are present in an almost cylindrical continuous length over the wholeouter periphery in the yarn cross section and in the whole longitudinal direction of theyarn. The core yarn and the rovings, etc., for the sheath are twisted and passed between apair of rocking rollers (5a) and (5b). The rovings or spun yarns for the sheath are slippedto the rocking rollers and then untwisted to take out the short fibers and afford anapped yarn. Thereby, the aimed yarn is obtained. 

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