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:
Sep. 15, 1987
Filed:
Dec. 20, 1985
Elbert F Morrison, Clarksville, VA (US);
Burlington Industries, Inc., Greensboro, NC (US);
Abstract
Positive twist control and a gentle action on the yarn are provided by a vacuum texturizing process for yarn. Single filament and multi-filament yarns can be processed, including fine denier filaments and/or weak thermoplastic filaments. Yarn is fed by feed rolls to a heater block and then to the generally axially through-extending passageway and a spindle perforated cylinder. The spindle is mounted for rotation about an axis, and is rotated at a speed of several hundred thousand rpm, while a vacuum in the range of about 8-12 inches of mercury is applied to the exterior of the cylinder. The force of the vacuum holds the yarn against the interior wall of the passageway so that each rotation of the cylinder causes a twist of the yarn, which is backed up to the heater and set in a semi-permanent, false twist configuration. The yarn is withdrawn from the cylinder by output means, at which time the twist relieves itself and a textured, bulk, stretch-type yarn is produced.