Patents by Inventor Rachel Doris Rieck

Rachel Doris Rieck 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).

  • Methods and devices to transfer toner in an image forming device to control charge buildup on a toner image
    Patent number: 7711298
    Abstract: The present application is directed to methods and devices for controlling charge buildup on a toner image as the toner image passes through one or more transfer nips. Charge buildup may be reduced by laterally offsetting a transfer roller from a photoconductor drum. The transfer roller may be constructed of an essentially non-compressible conductive material. AC current may be used to generate an electrical field between the photoconductor drum and the transfer roller.
    Type: Grant
    Filed: November 28, 2007
    Date of Patent: May 4, 2010
    Assignee: Lexmark International, Inc.
    Inventors: Julie Ann Gordon Whitney, Rachel Doris Rieck
  • Toner Transfer Apparatus
    Publication number: 20090136272
    Abstract: The present application is directed to methods and devices for controlling charge buildup on a toner image as the toner image passes through one or more transfer nips. Charge buildup may be reduced by laterally offsetting a transfer roller from a photoconductor drum. The transfer roller may be constructed of an essentially non-compressible conductive material. AC current may be used to generate an electrical field between the photoconductor drum and the transfer roller.
    Type: Application
    Filed: November 28, 2007
    Publication date: May 28, 2009
    Inventors: Julie Ann Gordon Whitney, Rachel Doris Rieck