Patents by Inventor Bruce D. Mountney

Bruce D. Mountney has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Heather yarn made by combining polyester and polyamide yarns
    Patent number: 4226079
    Abstract: A continuous process is disclosed for producing a heather yarn from a continuous filament polyester feed yarn having a residual draw ratio in the range of from 1.6 to 2.0 and a continuous filament polyamide feed yarn having a residual draw ratio in the range of from 106 to 120 percent of the residual draw ratio of the polyester feed yarn. The process involves the steps of: (1) combining the yarns; (2) false twist texturing and drawing the combined yarns in a draw-texturing zone comprising feed rolls, a heating means, a friction twisting element and draw rolls; (3) randomly entangling the combined and textured yarns together in a jet-intermingling zone formed by an air jet device; and (4) withdrawing the heather yarn so produced.
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: October 7, 1980
    Assignee: Du Pont Canada Inc.
    Inventors: Bruce D. Mountney, Ralph C. Wirsig