Patents by Inventor Yimin Guan

Yimin Guan 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).

  • Long-life stable-jetting thermal ink jet printer
    Patent number: 6565176
    Abstract: A thermal ink jet printing apparatus maintains stable printing output as certain characteristics of the apparatus change over its operational lifetime. The apparatus includes an ink jet print head with resistive heating elements for receiving electrical energy pulses having a voltage level and for transferring heat energy pulses having a desired energy level into adjacent ink based on the electrical energy pulses. The print head includes nozzles associated with the resistive heating elements through which droplets of the ink are ejected when the heat energy pulses are transferred into the ink. The apparatus further includes a printer controller in electrical communication with the print head.
    Type: Grant
    Filed: May 25, 2001
    Date of Patent: May 20, 2003
    Assignee: Lexmark International, Inc.
    Inventors: Frank Edward Anderson, Thomas Austin Fields, Paul William Graf, Yimin Guan, George Keith Parish, Kent Lee Ubellacker
  • LONG-LIFE STABLE-JETTING THERMAL INK JET PRINTER
    Publication number: 20030016258
    Abstract: A thermal ink jet printing apparatus maintains stable printing output as certain characteristics of the apparatus change over its operational lifetime. The apparatus includes an ink jet print head with resistive heating elements for receiving electrical energy pulses having a voltage level and for transferring heat energy pulses having a desired energy level into adjacent ink based on the electrical energy pulses. The print head includes nozzles associated with the resistive heating elements through which droplets of the ink are ejected when the heat energy pulses are transferred into the ink. The apparatus further includes a printer controller in electrical communication with the print head.
    Type: Application
    Filed: May 25, 2001
    Publication date: January 23, 2003
    Inventors: Frank Edward Anderson, Thomas Austin Fields, Paul William Graf, Yimin Guan, George Keith Parish, Kent Lee Ubellacker