Patents by Inventor Thomas Judson Campbell

Thomas Judson Campbell 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: 8725017
    Abstract: A printer is provided including a substrate transport apparatus; a pick mechanism; a fuser assembly having a heat transfer member including a belt and a heater, a backup member for engaging the belt so as to define a fusing nip with the belt, and a temperature sensor associated with the backup member for sensing the temperature of the backup member; and a controller coupled to the substrate transport apparatus, the pick mechanism, the heater and the temperature sensor. The controller causes the pick mechanism to remove substrates from the storage tray at a first pick rate when the backup member is at a temperature within a first backup member index temperature range and at different pick rate less than the first pick rate when the backup member is at a temperature greater than the first backup member index temperature range.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: May 13, 2014
    Assignee: Lexmark International, Inc.
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, Hrishikesh Pramod Gogate, David William Shuman
  • Patent number: 8175482
    Abstract: A printer is provided comprising substrate transport apparatus for moving substrates along a substrate path through the printer; a fuser assembly comprising a heat transfer member including a belt and a heater to heat the belt, a backup member adapted to engage the belt so as to define a fusing nip with the belt, and a temperature sensor for sensing a temperature of a portion of the backup member; and a controller coupled to the temperature sensor. Based on signals generated by the temperature sensor, the controller determines whether a substrate moving along the substrate path has been contacted by the backup member portion.
    Type: Grant
    Filed: December 31, 2010
    Date of Patent: May 8, 2012
    Assignee: Lexmark International, Inc.
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, James Douglas Gilmore, Hrishikesh Pramod Gogate, James Allen Lokovich, Wesley David McIntire
  • Patent number: 8064816
    Abstract: A printer is provided, including a substrate transport apparatus for moving substrates along a substrate path; a media sensor actuated by mid-width and full substrates but not by narrow width substrates; and a fuser assembly including a belt, a heater to heat the belt, a backup member to engage the belt so as to define a fusing nip with the belt, and a temperature sensor for sensing a temperature of a portion of the backup member engaging only full width substrates. A controller is coupled to the media sensor and the temperature sensor for determining whether a substrate moving through the fuser assembly is a narrow width, mid-width or full width substrate.
    Type: Grant
    Filed: March 26, 2008
    Date of Patent: November 22, 2011
    Assignee: Lexmark International, Inc.
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, James Douglas Gilmore, Hrishikesh Pramod Gogate, James Allen Lokovich, Wesley David McIntire
  • Publication number: 20110097663
    Abstract: A printer is provided comprising substrate transport apparatus for moving substrates along a substrate path through the printer; a fuser assembly comprising a heat transfer member including a belt and a heater to heat the belt, a backup member adapted to engage the belt so as to define a fusing nip with the belt, and a temperature sensor for sensing a temperature of a portion of the backup member; and a controller coupled to the temperature sensor. Based on signals generated by the temperature sensor, the controller determines whether a substrate moving along the substrate path has been contacted by the backup member portion.
    Type: Application
    Filed: December 31, 2010
    Publication date: April 28, 2011
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, James Douglas Gilmore, Hrishikesh Pramod Gogate, James Allen Lokovich, Wesley David McIntire
  • Publication number: 20090245838
    Abstract: A fuser assembly is provided comprising: a heat transfer member including a belt and a heater to heat the belt; a backup member adapted to engage the belt so as to define a fusing nip with the belt; a temperature sensor associated with the backup member for sensing the temperature of the backup member; and a controller coupled to the heater and the temperature sensor. The controller controls the operation of the heater based on the backup member temperature.
    Type: Application
    Filed: March 26, 2008
    Publication date: October 1, 2009
    Inventors: David William Shuman, Jichang Cao, Cyrus Bradford Clarke, William Paul Cook, Hrishikesh Pramod Gogate, Wesley David Mclntire, Thomas Judson Campbell
  • Publication number: 20090245837
    Abstract: A printer is provided comprising substrate transport apparatus for moving substrates through the printer along a substrate path; a pick mechanism for removing substrates from a storage tray and feeding the substrates to the substrate transport apparatus; a fuser assembly comprising a heat transfer member including a belt and a heater to heat the belt, a backup member adapted to engage the belt so as to define a fusing nip with the belt, and a temperature sensor associated with the backup member for sensing the temperature of the backup member; and a controller coupled to the substrate transport apparatus, the pick mechanism, the heater and the temperature sensor.
    Type: Application
    Filed: March 26, 2008
    Publication date: October 1, 2009
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, Hrishikesh Pramod Gogate, David William Shuman
  • Publication number: 20090245835
    Abstract: A printer is provided comprising substrate transport apparatus for moving substrates along a substrate path through the printer; a fuser assembly comprising a heat transfer member including a belt and a heater to heat the belt, a backup member adapted to engage the belt so as to define a fusing nip with the belt, and a temperature sensor for sensing a temperature of a portion of the backup member; and a controller coupled to the temperature sensor. Based on signals generated by the temperature sensor, the controller determines whether a substrate moving along the substrate path has been contacted by the backup member portion.
    Type: Application
    Filed: March 26, 2008
    Publication date: October 1, 2009
    Inventors: Thomas Judson Campbell, Jichang Cao, William Paul Cook, James Douglas Gilmore, Hrishikesh Pramod Gogate, James Allen Lokovich, Wesley David McIntire