Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Walter Steffes0
Klaus Schwamborn0
Date of Patent
February 27, 2007
0Patent Application Number
103453000
Date Filed
January 16, 2003
0Patent Primary Examiner
Patent 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.
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