Patents by Inventor David J. Hogle

David J. Hogle 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).

  • Selectively stressed endless belts
    Patent number: 5456639
    Abstract: An endless metal belt resistant to failure due to stress induced by bending contains an internal stress gradient of radially outward increasing compressive stress which opposes external stress applied to the belt. The belt can be made by an electroforming process.
    Type: Grant
    Filed: February 17, 1994
    Date of Patent: October 10, 1995
    Assignee: Xerox Corporation
    Inventors: William G. Herbert, David J. Hogle, Steven J. Grammatica, Peter J. Schmitt, Ronald E. Jansen, Mark S. Thomas
  • Process for preparing selectively stressed endless belts
    Patent number: 5316651
    Abstract: An endless metal belt resistant to failure due to stress induced by bending contains an internal stress gradient of radially outward increasing compressive stress which opposes external stress applied to the belt. The belt can be made by an electroforming process. While electroforming, at least one operating parameter selected from bath temperature, current density, agitation, and stress reducer concentration is adjusted to cause the internal stress to gradually increase, compressively, from the radially inner surface of the belt to the radially outer surface of the belt. The internal stress preferably increases at a substantially constant rate and may range from about 160,000 psi tensile at the inner surface to about 120,000 psi compressive at the outer surface.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: May 31, 1994
    Assignee: Xerox Corporation
    Inventors: William G. Herbert, David J. Hogle, Steven J. Grammatica, Peter J. Schmitt, Ronald E. Jansen, Mark S. Thomas