Patents by Inventor Richard L. Poythress

Richard L. Poythress 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).

  • Patent number: 4274361
    Abstract: Electrostatic and magnetic transfer apparatus for conducting and magnetically attracting electronically conductive toner from the surface of a dielectric drum to a secondary substrate such as plain paper wherein a fixed permanent magnet disposed within a hollow cylindrical roller located at the image transfer point within a portion of a continuous loop of semi-conductive material supplies additional attractive force between the toner and the substrate exclusively at the image transfer point which in combination with the electrostatic transfer force applied to the imaged dielectric surface of the drum by means of a voltage potential applied to the hollow cylindrical roller, produces a dense, well defined pattern of intelligence replicating what was originally applied to the dielectric surface.
    Type: Grant
    Filed: November 2, 1979
    Date of Patent: June 23, 1981
    Assignee: Burroughs Corporation
    Inventors: John R. Sanders, Richard L. Poythress, Richard E. Shultz, William F. Buholtz, Richard C. Fedder