Patents by Inventor Jennifer E. Dewan

Jennifer E. Dewan 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).

  • Feedback control system for polymer modification of toner resins and toners
    Patent number: 5750909
    Abstract: An apparatus for the preparation of a mixture of toner resin and initiator, to form a toner resin or toner mixture including cross-linked microgel particles is provided. The apparatus includes a toner extruder having the resin being conveyed therethrough and an adder for adding the initiator to the toner resin in the toner extruder to form the toner resin or mixture. The apparatus also includes a measurer for measuring the cross-linked microgel particles in the toner mixture substantially immediately after mixing in the toner extruder and transmitting a signal indicative of the quantity of cross-linked microgel particles in the toner resin or mixture. The apparatus also includes a controller for controlling the addition rate of initiator in response to the signals from the measurer.
    Type: Grant
    Filed: February 6, 1997
    Date of Patent: May 12, 1998
    Assignee: Xerox Corporation
    Inventors: Michael G. Hawkins, Hui Chang, Joo T. Chung, Jennifer E. Dewan, John J. Ianni, J. Stephen Kittelberger, Joseph L. Leonardo, Timothy L. Lincoln, Yvonne M. Kenney
  • Feedback control system for polymer modification of toner resins and toners
    Patent number: 5650484
    Abstract: An apparatus for the preparation of a mixture of toner resin and initiator, to form a toner resin or toner mixture including cross-linked microgel particles is provided. The apparatus includes a toner extruder having the resin being conveyed therethrough and an adder for adding the initiator to the toner resin in the toner extruder to form the toner resin or mixture. The apparatus also includes a measurer for measuring the cross-linked microgel particles in the toner mixture substantially immediately after mixing in the toner extruder and transmitting a signal indicative of the quantity of cross-linked microgel particles in the toner resin or mixture. The apparatus also includes a controller for controlling the addition rate of initiator in response to the signals from the measurer.
    Type: Grant
    Filed: July 12, 1995
    Date of Patent: July 22, 1997
    Assignee: Xerox Corporation
    Inventors: Michael G. Hawkins, Hui Chang, Joo T. Chung, Jennifer E. Dewan, John J. Ianni, J. Stephen Kittelberger, Joseph L. Leonardo, Timothy L. Lincoln, Yvonne M. Kenney