Patents by Inventor Walter R. Curfman

Walter R. Curfman 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).

  • Compact long spin system
    Patent number: 5948334
    Abstract: Process and apparatus for the manufacture of polyolefin-containing fibers, preferably high-smectic content polyolefin-containing fibers, wherein a spin height of less than about 4 meters is utilized at spinning speeds of at least about 500 m/min. Further, guidance wings and/or an exhaust extensions are disclosed for various spinning systems to assist in the quenching of fibers. Fibers produced by the invention, preferably skin-core fiber, enable the production of nonwoven materials having excellent properties.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: September 7, 1999
    Assignee: Fiberco, Inc.
    Inventors: Kunihiko Takeuchi, Clayton E. Torrence, Donald J. Pederson, Walter R. Curfman, Shiv Sibal, Michael P. Hegwood, Dwayne S. Weaver