Patents by Inventor Werner Portmann

Werner Portmann 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).

  • Winding device with automatic tube change operation
    Patent number: 3941321
    Abstract: A winding device for endless threads for automatically exchanging a fully wound bobbin tube against an empty tube, comprising at least two bobbin chucks for taking-up the tubes, and which bobbin chucks are arranged upon a pivotable arm. The bobbin tubes are alternately brought into contact, during pivoting of the pivotal arm, first with the circumference of an accelerating ring and then with the circumference of a friction drive drum. The circumferential speed of the accelerating ring exceeds that of the friction drive drum. The accelerating ring can be driven independent of the friction drive drum.
    Type: Grant
    Filed: March 4, 1974
    Date of Patent: March 2, 1976
    Assignee: Rieter Machine Works Ltd.
    Inventors: Peter Bosshard, Werner Portmann, Olivier Wust