Patents by Inventor Doyle D. Durkee

Doyle D. Durkee 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).

  • Plastics trim press sheet feeding mechanisms
    Patent number: 4380183
    Abstract: A trim press is provided with a remotely controlled adjustment by means of which the end limit of the feeding stroke of the feeding mechanism may be precisely adjusted relative to the die of the trim press while the machine is in operation. Oscillating and reciprocating members of the prior art trim presses are replaced by continuously rotating members to enable a higher rate of operation.
    Type: Grant
    Filed: May 20, 1981
    Date of Patent: April 19, 1983
    Assignee: Leesona Corporation
    Inventors: Fred L. Greynolds, Robert C. Whiteside, Doyle D. Durkee