Patents by Inventor Virginia A. Marqueling

Virginia A. Marqueling 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).

  • Image developer material agitation system with non-binding mixing coil agitator
    Patent number: 5575408
    Abstract: A particulate image developer material mixing system for a reproduction apparatus, with a rotatably driven helical mixing coil in a developer material sump for mixing the developer material in the sump, and with a system for holding the rotatably driven helical mixing coil in the sump, and a system for anti-bridging of the developer material by agitating the developer material in the sump by agitating the mixing coil; including a smoothly rounded rod substantially extending inside of the helical mixing coil with a smoothly enlarged diameter end portion outwardly radiused to operatively intermediately engage the mixing coil so that as the helical mixing coil is rotatably driven at least one coil thereof is periodically partially detained and deformed on the smoothly enlarged diameter end portion and then periodically released automatically after a further rotation, so as to provide a periodic anti-bridging agitation of the developer materials, at a desired frequency, and the free end of the helical mixing coil
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: November 19, 1996
    Assignee: Xerox Corporation
    Inventors: Virginia A. Marqueling, A. Lance Marchese, Bruce J. Parks, Darryl L. Pozzanghera, David B. Playfair