Patents by Inventor Kenneth E. Walters

Kenneth E. Walters 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).

  • Laminar flow toning station having conductive and nonconductive elements therein
    Patent number: 4851317
    Abstract: Apparatus for developing a latent electrostatic image on the image bearing surface of an imaging member using a liquid toner is characterized by a toning station having a toning member therein. The toning member has a conductive and a nonconductive element thereon. The nonconductive element is disposed upstream of the conductive element in the direction of movement along the path of travel of the image bearing surface through the toning station. The conductive element is connected to a bias voltage so that the image is toned first in the absence of a bias followed by toning in the presence of a bias voltage. Laminar toner flow is maintained in the direction of movement of the image bearing surface during the contact of the surface with the toner.
    Type: Grant
    Filed: November 4, 1987
    Date of Patent: July 25, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Thomas C. Chuang, Kenneth E. Walters