Patents Assigned to Volkman GmbH & Co.
  • Patent number: 6035620
    Abstract: A twisting spindle has a spindle that is driven in rotation, a protective pot supported on the spindle and secured against rotation, and a rotary disk fixedly connected to the spindle. The rotary disk has a radially extending yarn channel connected to the hollow spindle axle and supports a cylindrical mantle surrounding the protective pot. The cylindrical mantle has above the outlet opening of the yarn channel a yarn guide element. An intermediate housing that is freely rotatable and surrounds the rotary disk and the cylinder mantle is provided. A stationary outer housing receiving the intermediate housing is also provided.
    Type: Grant
    Filed: September 8, 1998
    Date of Patent: March 14, 2000
    Assignee: Volkman GmbH & Co.
    Inventors: Jurgen Kallmann, Ingo Filz
  • 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