Patents by Inventor Phoa Tek Tjin

Phoa Tek Tjin 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).

  • Patent number: 5873231
    Abstract: An open end spinning method includes the step of providing a spinning chamber with an annular slip wall. A sliver of fiber material is placed onto the annular slip wall that widens continuously in the direction of sliver introduction into the spinning chamber. The angle of the annular slip wall to a rotational axis of the spinning chamber is between 8.degree. and 12.degree.. A yarn is formed from the fiber material in the yarn formation zone which is located within the portion of the annular slip wall upstream of a widest diameter of the annular slip wall viewed in the direction of sliver introduction. The fiber material is removed as a yarn from the spinning chamber through a yarn removal channel, extending along the rotational axis of the spinning chamber, in the direction opposite the direction of sliver introduction.
    Type: Grant
    Filed: July 29, 1997
    Date of Patent: February 23, 1999
    Assignee: Volkman GmbH & Co.
    Inventor: Phoa Tek Tjin