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US 5,289,673 AGranted
Device to untwist, unravel and open up a textile yarn
AssigneeMesdan S.p.A.
InventorsRemi Cottenceau, Erwin Zuercher
Life of this patent
Estimating the term…
Abstract
The device involves the use of two nozzles (5 and 6) alternatively blow air jets against a yarn in the central portion of a channel (1), these nozzles being symetrically 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 device for loosening, unravelling and opening-up a textile yarn comprising:
- fluid flip flop circuit means for receiving pressurized air at an input and for alternately feeding each one of at least two exit nozzles with pressurized air received at said input;
- and
- channel means for receiving the pressurized air exiting from said at least two exit nozzles of said fluid flip flop circuit means and for directing the pressurized air against the textile yarn, thereby loosening, unravelling and opening-up the textile yarn, wherein
- said channel means is open at each end and has a side longitudinal opening.
1 more element
Dependencies are inferred from the claim text.