Patents by Inventor Barbara J. Schaeffer

Barbara J. Schaeffer 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: 7076193
    Abstract: An apparatus for developing in a development zone a latent image recorded on a surface, including a housing defining a chamber storing at least a supply of toner therein; a donor member disposed of at least partially in the chamber of the housing and spaced from the surface, the donor member being adapted to rotate about a longitudinal axis to transport toner to the development zone in a region opposed from the surface; and a wire assembly module mounted the development zone and extending in a direction transverse to the longitudinal axis, the wire assembly module including a wire and a drive system for translating portions of the wire in the development zone, and power supply for electrically biasing the wire to detach toner from the donor member so as to form a toner powder cloud in the development zone with detached toner from the toner cloud developing the latent image.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: July 11, 2006
    Assignee: Xerox Corporation
    Inventors: Joseph M. Wing, Scott Douglas Berner, legal representative, Ron E. Dufort, Robert E. Hildebrand, Michael J. Martin, Barbara J. Schaeffer, James J. Spence, Douglas G. Berner, deceased
  • Publication number: 20050265754
    Abstract: An apparatus for developing in a development zone a latent image recorded on a surface, including a housing defining a chamber storing at least a supply of toner therein; a donor member disposed of at least partially in the chamber of the housing and spaced from the surface, the donor member being adapted to rotate about a longitudinal axis to transport toner to the development zone in a region opposed from the surface; and a wire assembly module mounted the development zone and extending in a direction transverse to the longitudinal axis, the wire assembly module including a wire and a drive system for translating portions of the wire in the development zone, and power supply for electrically biasing the wire to detach toner from the donor member so as to form a toner powder cloud in the development zone with detached toner from the toner cloud developing the latent image.
    Type: Application
    Filed: May 26, 2004
    Publication date: December 1, 2005
    Inventors: Joseph Wing, Douglas G. Berner, Scott Douglas Berner, Ron E. Dufort, Robert E. Hildebrand, Michael J. Martin, Barbara J. Schaeffer, James J. Spence
  • Patent number: 6498913
    Abstract: A static controlling system is provided for effectively and economically controlling static charge build up on a driven web member moving in contact with support structures. The static controlling system includes (a) at least one resistive contact member for contacting the surface of the driven web member, and (b) a bias source coupled to the resistive contact member for biasing the resistive contact member to apply to the surface of the driven web member a neutralizing bias, having a selected polarity and potential level, thereby effectively neutralizing and controlling static charge build up on the driven web member.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: December 24, 2002
    Assignee: Xerox Corporation
    Inventors: Ana P. Tooker, Barbara J. Schaeffer, James D. Walsh, William H. Wayman
  • Patent number: 4479883
    Abstract: A lubricating oil composition having particularly improved friction reducing properties which comprises an ester of a polycarboxylic acid with a glycol or glycercol and a selected metal dithiocarbamate and contains a relatively low level of phosphorus.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: October 30, 1984
    Assignee: Exxon Research & Engineering Co.
    Inventors: Harold Shaub, Barbara J. Schaeffer