Method and apparatus for producing spun yarn
AssigneeMurata Kikai Kabushiki Kaisha
InventorToshihumi Morihashi
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Abstract
This present invention relates to a spun yarn having novel structure and a method of producing the same. The spun yarn of the present invention consists of a number of fibers arranged in a predetermined direction and twisted together, one end of which fibers is spirally wound around the surface of the yarn. The yarn of the present invention is spun by successively passing a sliver through a pneumatic yarn twisting device, untwisting tube, and false twisting device in turn. The twisting device, untwisting tube and false twisting device are disposed between front rollers and delivery rollers.
Claims13
The method of producing a spun yarn comprising the steps of passing a staple fiber bundle through pneumatic twisting means, through an untwisting tube and through a false twisting means in line and in that order with the internal diameter of the untwisting tube being smaller than the internal diameter of the pneumatic twisting means and the false twisting means to effect ballooning of the fiber bundle between the front rollers and the untwisting tube and loosening and slipping of the fibers of the bundle in the pneumatic twisting means.
Structure for producing a spun yarn comprising a pneumatic yarn twisting means, a untwisting tube and a false twisting means constructed and arranged to receive a staple fiber bundle and to pass the staple fiber bundle therethrough in that order, said pneumatic yarn twisting means and false twisting means having larger internal diameters than the internal diameter of the untwisting tube.
Dependencies are inferred from the claim text.