Patents by Inventor Richard L. Kjar

Richard L. Kjar 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).

  • Electrostatographic developer unit having multiple magnetic brush rolls with a magnetic restrictor for carrier particle emission control
    Patent number: 7356292
    Abstract: A development station in an electrostatographic imaging machine impedes the flow of carrier particles out of the development station as the developer moves from an upper to a lower magnetic roll.
    Type: Grant
    Filed: June 15, 2006
    Date of Patent: April 8, 2008
    Assignee: Xerox Corporation
    Inventors: Ajay Kumar, Keith Allan Nau, David A. Reed, Hirotsugu Oba, Jonathan David Sadik, Richard L. Kjar
  • Electrostatographic developer unit having multiple magnetic brush rolls with a magnetic restrictor for carrier particle emission control
    Publication number: 20070292166
    Abstract: A development station in an electrostatographic imaging machine impedes the flow of carrier particles out of the development station as the developer moves from an upper to a lower magnetic roll.
    Type: Application
    Filed: June 15, 2006
    Publication date: December 20, 2007
    Applicant: Xerox Corporation
    Inventors: Ajay Kumar, Keith Allan Nau, David A. Reed, Hirotsugu Oba, Jonathan David Sadik, Richard L. Kjar
  • Xerographic developer unit with specialized exit port for developer material
    Patent number: 7206538
    Abstract: In a basic design of a developer unit for electrostatographic printing apparatus, an exit port is defined in the housing of the developer unit, for the passage of waste or surplus toner therethrough. An insert, defining a predetermined spillover barrier height and a predetermined exit angle, is associated with the exit port. Different types of inserts can be provided for operating the basic design of developer unit at different print output speeds, or with different compositions of developer material.
    Type: Grant
    Filed: March 29, 2005
    Date of Patent: April 17, 2007
    Assignee: Xerox Corporation
    Inventors: Ajay Kumar, Jonathan D. Sadik, Keith A. Nau, David A. Reed, Richard L. Kjar