Patents by Inventor Robert W. Pletcher

Robert W. Pletcher 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).

  • Cleaning station
    Patent number: 4213794
    Abstract: In electrographic apparatus having a cleaning station with a rotating cleaning brush which removes residual toner from a reusable imaging surface, a rotating comb has bristles in engagement with the brush. The bristles of the comb are arranged in two opposed helical segments for removing toner particles from the brush and for transporting such toner particles along a path to a collecting region to facilitate their effective removal by a vacuum system. Residual toner is removed by rotating the comb at an angular velocity 25 to 50 percent greater than the angular velocity of the cleaning brush.
    Type: Grant
    Filed: March 12, 1979
    Date of Patent: July 22, 1980
    Assignee: Eastman Kodak Company
    Inventors: David L. Wooding, Robert W. Pletcher
  • Cleaning station
    Patent number: 4172303
    Abstract: In electrographic apparatus having a cleaning station with a rotating cleaning brush which removes residual toner from a reusable imaging surface, a rotating comb has bristles in engagement with the brush. The bristles of the comb are arranged in two opposed helical segments for removing toner particles from the brush and for transporting such toner particles along a path to a collecting region to facilitate their effective removal by a vacuum system.
    Type: Grant
    Filed: April 3, 1978
    Date of Patent: October 30, 1979
    Assignee: Eastman Kodak Company
    Inventors: David L. Wooding, Robert W. Pletcher