The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 1985
Filed:
Jan. 18, 1982
Alexander Scott, Paisley, GB;
J & P Coats, Limited, Glasgow, GB;
Abstract
Synthetic yarn and yarn-like structures are formed by the method of treating separate strands of thermoplastic material so that at least one has a shrinkage ratio higher than normal at an elevated temperature. The strands are fed forwardly at different rates of overfeed and intermingled in a gas stream with formation of loops on the strands, then heated to cause them to shrink differentially while being held to a predetermined length until shrinkage ceases. Apparatus for performing the method includes yarn drawing means, intermingling means comprising a jet device incorporating intersecting passages for the strands and for a gas under pressure, feeding means and heating and cooling means for the intermingled yarn downstream from the jet device, also means for holding the intermingled yarn to a predetermined length while it is being heated and cooled. Yarn produced by the method incorporates filaments at least some of which present bud-like projections inhibiting relative movement of the filaments.