Patents by Inventor Robert E. Hewitt

Robert E. Hewitt 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).

  • Developer roll drive
    Patent number: 4118115
    Abstract: An apparatus in which a latent image arranged to be recorded on a surface is rendered visible with particles. The drive system associated with moving the particles into contact with the latent image has at least a portion thereof mounted internally of the particle supporting member.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: October 3, 1978
    Assignee: Xerox Corporation
    Inventor: Robert E. Hewitt
  • Cleaning system
    Patent number: 4093369
    Abstract: An apparatus in which particles are removed from a surface and collected. The particles are dislodged from the surface and move through a conduit to a storage housing. As the particles pass through the conduit, the particles are maintained spaced from the interior surface of the walls thereof.
    Type: Grant
    Filed: March 18, 1977
    Date of Patent: June 6, 1978
    Assignee: Xerox Corporation
    Inventor: Robert E. Hewitt