Patents by Inventor Frank H. Cornwall

Frank H. Cornwall 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).

  • Pressure fusing apparatus for an electrostatic reproducing machine
    Patent number: 4286863
    Abstract: A pressure fusing apparatus for an electrostatic reproducing machine having a vacuum hold-down plenum across which a sheet is guided before being passed through pressure fuser rollers. It has been found that passing the sheet over such a plenum under vacuum reduces the frequency of creasing in the sheets as they pass through the rollers.
    Type: Grant
    Filed: September 10, 1979
    Date of Patent: September 1, 1981
    Assignee: Pitney Bowes Inc.
    Inventors: Frank H. Cornwall, William A. Ross