DRAWING SYNTHETIC THERMOPLASTIC YARN

• US 3,681,826 A
• Filed: 10/05/1970
• Issued: 08/08/1972
• Est. Priority Date: 10/05/1970
• Status: Expired due to Term

• Current Assignee: Walter Bergwerk
• Original Assignee: Walter Bergwerk
• Inventors: Bergwerk, Walter
• Primary Examiner(s): Spicer, Jr., Robert L.
• Application Number:
  US05/077,791
• Time in Patent Office: 673 Days
• Field of Search: 18/1FS,1FT,1FZ,DIG.17,DIG.53 264/21R,21F,288,290
• US Class Current: 28/246
• CPC Class Codes: D02J 1/22 Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch stretch spinning D01D5/12

Abstract

Filamentary yarn composed of thermoplastic synthetic, organic polymers is uniformly drawn at high speed by directing a stream of heated liquid into the path of the yarn to heat the latter to drawing temperature at less than drawing tension and immediately thereafter drawing the yarn by passing it over one or more snubbing pins arranged close to but out of contact with the liquid stream.

Claims

2. Apparatus according to claim 1 wherein the snubbing means includes at least one cylindrical pin.

3. Apparatus according to claim 1 wherein the yarn supplying and withdrawing means are rollers.

4. Apparatus according to claim 3 including means for heating the withdrawing rollers.