Patents by Inventor Tek T. Phoa

Tek T. Phoa 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).

  • Method and apparatus for false twisting yarn in opened spinners
    Patent number: 4791781
    Abstract: In open-end rotor spinning, imparting lesser false twist to the yarn being formed as it revolves through the yarn receiving zone and greater false twist as it revolves away from the zone. This is accomplished by different frictional resistance surface characteristics on the surface of a navel, or by shaping the surface for lesser extent of yarn contact in one surface portion and greater extent of yarn contact in another surface portion.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: December 20, 1988
    Inventors: Tek T. Phoa, Joachim L/u/ nenschloss