Patents by Inventor Narayan Deshpende

Narayan Deshpende 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).

  • Method and apparatus for thermal ink jet drop volume control using variable prepulses
    Patent number: 6698862
    Abstract: A method and apparatus are providing for extending the drop volume control of a thermal ink jet print head. The print head has a plurality of drop ejectors, each of the plurality of drop ejectors has a heating element actuatable in response to input signals to eject an ink droplet from the print head. The method includes the steps of applying a plurality of print signals to the print head, the plurality of print signals corresponding to an image for the ink jet assembly to create, applying at least one pulse signal to the print head, and sequentially using the at least one pulse signal and the plurality of print signals to activate the heating elements so that the change in current remains small.
    Type: Grant
    Filed: January 16, 2003
    Date of Patent: March 2, 2004
    Assignee: Xerox Corporation
    Inventors: Yungran Choi, Dale Ims, Narayan Deshpende, Juan Becerra