Universal method to untwist, unravel and open up a textile yarn
AssigneeMesdan S.p.A.
InventorsRemi Cottenceau, Erwin Zuercher
Life of this patent
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Abstract
The method involves the use of two nozzles (5 and 6) which alternatively blow air jets against a yarn in the central portion of a channel (1), these nozzles being symmetrically placed in relation to a plane containing the channel axis. The jets blowing frequency is of several hundreds of Hz. A deflector (3) in the bottom of channel (1) can deviate the beating thread sidewise and consequently impart thereto alternate twisting and untwisting motion in order to unravel the thread.
Claims5
A universal method for loosening, unravelling and opening-up a textile yarn by placing the free end of this yarn in a pressurized, channelled air stream while holding the base of this free end in the upstream portion of this air stream, characterized in forming said air stream by means of at least two alternately interrupted air jets which are directed toward a longitudinal axis of a channelling element for said air stream, and wherein an alternating frequency of the air jets is on the order of several hundreds of Hz.
Dependencies are inferred from the claim text.