Process and apparatus for producing textured multifilament yarn
AssigneeToray Industries, Inc.
InventorsTakao Negishi, Kazuo Tomiita
Life of this patent
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Abstract
Process and apparatus for producing an interlaced multifilament yarn having a balanced compactness and bulkiness, composed of compact and open portions alternately appearing along its length, the compact portions having a fairly uniform configuration of interlacement. The yarn is prepared by bringing a running bundle of filaments in contact with two bending members for bending the thread-line so as to fix the thread-line between them and interlacing the filaments with an air jet as they pass between the bending members while forming such a stabilized thread-line.
Claims16
An apparatus for the production of textured multifilament yarns, which comprises an elongated hollow member defining, by the inner surface of its wall, a yarn passage which has a cross-sectional shape having at least two lines of symmetry and extends along the longitudinal axis of said hollow member, said elongated hollow member being provided with at least one fluid inlet passage extending in a plane perpendicular to the longitudinal axis of said yarn passage and through the wall of said hollow member with one end open to said yarn passage and with the other end communicated with a source of fluid under high pressure, and a pair of bending members respectively located upstream and downstream of said fluid inlet passage for bending the thread-line of the yarn being processed, said fluid inlet passage being located so that the central line of said inlet passage will intersect the thread-line of the yarn being processed and will coincide with one of the lines of symmetry of the cross-sectional shape of the yarn passage.
A process for manufacturing a textured multifilament yarn provided with compact portions and open portions alternately distributed along the lengthwise direction thereof, comprising contacting a running bundle of filaments with two curved members longitudinally spaced apart from each other so that the thread-line is bent at each point of contact and a running passage of said bundle of filaments is substantially formed under yarn tension in the entire space between said two curved members, and discharging at least one fluid flow against said bundle of filaments passing along said running passage from one side of said bundle of filaments so that individual filaments of said bundle are vibrated in said entire space without any disturbance, whereby said individual filaments are randomly and intermittently crossed in the direction of said discharged fluid flow.
Dependencies are inferred from the claim text.