Patents by Inventor Helmut Deussen

Helmut Deussen 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 of producing mottled rotor spun yarn
    Patent number: 4845946
    Abstract: A mottled appearing yarn having a main strand of fibers and wrapper fibers of different color than the main strand. The yarn is produced by feeding longer and coaser fibers with shorter and finer fibers in an open end rotor spinning machine and controlling the operation to accentuate wrapper fiber formation with the longer and coarser fibers. The wrapper fiber formation is accentuated by using a relatively low rotor diameter to fiber length ratio and by using an aggressive navel action.
    Type: Grant
    Filed: February 24, 1988
    Date of Patent: July 11, 1989
    Assignee: W. Schlafhorst & Co.
    Inventor: Helmut Deussen