Patents by Inventor Walter Steffes

Walter Steffes 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 tape and method of making winding tape
    Patent number: 7182900
    Abstract: In a method for manufacturing a winding tape (10) of unsintered polytetrafluoroethylene wherein polytetrafluoroethylene powder is mixed with a lubricating or slip agent, the material is molded into a cylindrical blank (1) and the blank (1) is first extruded as a strand with small outer dimensions and subsequently calendered into the tape (10) in the forming gap (13) of a pair of rolls (8,9). The surface of at least one roll is deformed under compression during calendering of the round rope (6) into the tape.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: February 27, 2007
    Assignee: Hew-Kabel/CDT GmbH & Co. KG
    Inventors: Klaus Schwamborn, Walter Steffes
  • Winding tape and method of making winding tape
    Publication number: 20030152750
    Abstract: In a method for manufacturing a winding tape (10) of unsintered polytetrafluoroethylene wherein polytetrafluoroethylene powder is mixed with a lubricating or slip agent, the material is molded into a cylindrical blank (1) and the blank (1) is first extruded as a strand with small outer dimensions and subsequently calendered into the tape (10) in the forming gap (13) of a pair of rolls (8,9). The surface of at least one roll is deformed under compression during calendering of the round rope (6) into the tape.
    Type: Application
    Filed: January 16, 2003
    Publication date: August 14, 2003
    Inventors: Klaus Schwamborn, Walter Steffes
  • Extrudable halogen-free mixture
    Patent number: 6140411
    Abstract: Extrudable halogen-free mixture comprising 95-5 weight-% polyetherimide polymer with an elastic modulus greater than 2000 MPa and 5-95 weight-% flexible siloxane-polyetherimide copolymer with an elastic modulus of less than 2000 MPa. Electrical cable or wiring insulated with the extrudable halogen-free mixture comprising 60-90 weight-% of a polyetherimide polymer with an elastic modulus greater than 2000 MPa and 40-10 weight-% of a flexible siloxane-polyetherimide copolymer with an elastic modulus of less than 1000 MPa. Electrical or optical cable or tubing sheathed with the extrudable halogen-free mixture comprising 40-10 weight-% of a polyetherimide polymer with an elastic modulus greater than 2000 MPa and 60-90 weight-% of a flexible siloxane-polyetherimide copolymer with an elastic modulus of less than 1000 MPa.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: October 31, 2000
    Assignee: Eilentropp KG
    Inventors: Klaus Schwamborn, Walter Steffes, Manfred Sikora
  • Elongated tubular housing for monitoring systems
    Patent number: 5896894
    Abstract: Recesses or openings (4) are arranged in a wall of an elongated tubular covering (3) made of resinous plastics that are resistant to temperature stresses and/or aggressive media; these openings are covered from the outside by a microporous layer (5) made of a fluoropolymer that is resistant to high temperatures.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: April 27, 1999
    Assignee: Eilentropp KG
    Inventors: Klaus Schwamborn, Manfred Sikora, Walter Steffes