Patents by Inventor James H. Highfield

James H. Highfield 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).

  • Rotary die cutting machine
    Patent number: 4643062
    Abstract: A rotary die cutter for cutting sheet material has a drive mechanism which reduces the shock applied between the work piece and the die. Including a drive train for the die cutting rollers which permits slippage. The drive train can have a tension belt system which allows slippage when excessive force is required at the die so that the shock on the prime mover and drive train is minimized.
    Type: Grant
    Filed: August 28, 1985
    Date of Patent: February 17, 1987
    Assignee: Kirby's Engineers, Ltd.
    Inventors: James H. Highfield, Roy Pugh