Patents by Inventor Robert L. Kopenhaver

Robert L. Kopenhaver 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: 4352837
    Abstract: An improved apparatus for manufacturing roofing shingles having multiple ply appearance, in which an elongated strip of a dry organic or mineral material previously saturated in an asphalt tank and with at least one uniform longitudinally continuous strip of a first coating of granules is fed into the apparatus. The apparatus automatically and repeatedly applies spaced apart bands of varying widths of an adhesive material onto the first coating of granules. A second coating of granules is then automatically applied by the improved apparatus to the asphaltic bands. The application of the adhesive bands and the subsequent granule distribution are synchronized so that the granules are distributed only upon the bands of adhesive.
    Type: Grant
    Filed: May 22, 1981
    Date of Patent: October 5, 1982
    Assignee: Certain-teed Corporation
    Inventor: Robert L. Kopenhaver