Patents by Inventor John H. Hollister

John H. Hollister 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).

  • Pipe coating method and apparatus
    Patent number: 4130453
    Abstract: Pipe is coated by extruding a band of heat-softened thermoplastic, cooling the band and passing it through tension-isolating snubber rolls then applying it to the surface of the rotating, advancing pipe under tension, and controlling the tension isolating snubber rolls and rate of movement of the pipe surface with respect to the rate of extrusion to provide substantially controlled tension on the band between the extruder and the tension isolating means and to provide a second, higher tension on the band between the tension isolating means and contact of the band with the pipe surface.
    Type: Grant
    Filed: July 28, 1977
    Date of Patent: December 19, 1978
    Assignee: The Kendall Company
    Inventor: John H. Hollister