Patents by Inventor Rolf Langer

Rolf Langer 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: 4007581
    Abstract: In the spinning or twisting of continuous fibrous material at a spinning or twisting frame station comprising a spindle for carrying a bobbin, a ring concentrically mounted about the spindle and supporting a traveler for guiding the fibrous material onto the bobbin and means for driving the ring and the spindle, the improvement comprising engaging the fibrous material at the head of the spindle thereby to reduce or eliminate ballooning of the fibrous material and rotating the ring at a lesser rate that the spindle thereby to decrease the tension on the yarn.
    Type: Grant
    Filed: September 18, 1975
    Date of Patent: February 15, 1977
    Assignee: VEB Spinnereimaschinenbau
    Inventors: Rolf Langer, Peter Thierfelder, Harald Geisler
  • Patent number: 4002016
    Abstract: In an open end spinning apparatus for converting staple fibers into yarn, the apparatus comprising a rotor having a rotatable surface to which a substantially parallel array of the fibers is fed substantially along the axis of the rotor and by engagement with which the fibers are twisted together, the improvement comprising a needle non-rotatably mounted adjacent the rotor and having a free end impinging on the path of travel of the array of fibers to the rotor and being directed obliquely of the rotor axis in the direction of the rotor, whereby the needle engages the array of fibers and thereby holds back the fibers at that point from co-rotating with the fibers engaged by the rotor.
    Type: Grant
    Filed: August 13, 1975
    Date of Patent: January 11, 1977
    Assignee: VEB Spinnereimaschinenbau
    Inventors: Peter Fischer, Bruno Schmidt, Rolf Langer, Gunter Trommer