Patents by Inventor Stanley Perdue

Stanley Perdue 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).

  • Apparatus having moveable pocket forming members for injection molding a composite plate
    Patent number: 3947199
    Abstract: A novel printing plate is produced by placing an electrotype shell and a partial base in a mold cavity, holding them in place in properly spaced relation to each other as by means of vacuum and hydraulically or pneumatically operated holddown mechanisms, and filling the mold cavity with molten plastic or similar synthetic material from a plastic injection machine. The partial base skeleton includes scarf cavities, and portions of this skeleton may be embedded in the plastic when it hardens into the final shape.
    Type: Grant
    Filed: December 13, 1972
    Date of Patent: March 30, 1976
    Inventors: Robert F. Hecht, Stanley Perdue