Patents Assigned to Pattridge Post Tension, Inc.
  • Method for making a lap seam extruded tendon
    Patent number: 4533421
    Abstract: A method and die arrangement are disclosed for making a seamed plastic jacket for a tendon suitable for various applications, such as post tensioning concrete. In the method, a heated, curled, discontinuous strip of plastic material is extruded around a moving strand which has been previously coated with a corrosion inhibitor. The discontinuous strip, which includes ends that overlap, is then pulled down around the moving strand and pressure is applied to the overlapping sections to form a seal.
    Type: Grant
    Filed: April 25, 1984
    Date of Patent: August 6, 1985
    Assignee: Pattridge Post Tension, Inc.
    Inventor: David Pattridge