Patents by Inventor Lakshmi Channarayapatna Shankar

Lakshmi Channarayapatna Shankar 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).

  • Printhead incorporating pressure pulse diffusing structures between ink chambers supplied by same ink inlet
    Patent number: 7980674
    Abstract: An inkjet printer includes a printhead having a plurality of ink chambers fed be an ink inlet, each ink chamber having a heater element for ejecting drops of ink from a nozzle aperture of each chamber; a plurality of pressure pulse diffusing structure positioned between the plurality of ink chambers fed by the ink inlet, the plurality of pressure pulse diffusing structures for retarding a propagation of pressure waves generated by each ink chamber to adjacent ink chambers; and a controller for receiving print data and generating drive pulses to energize the heater elements in accordance with the print data. The controller increases the drive pulse energy during the printhead lifetime such that the drive pulse energy is never less than that of a preceding drive pulse.
    Type: Grant
    Filed: January 31, 2011
    Date of Patent: July 19, 2011
    Assignee: Silverbrook Research Pty Ltd
    Inventors: Kia Silverbrook, Roger Mervyn Lloyd Foote, Angus John North, Jennifer Mia Fishburn, Paul David Lunsmann, Lakshmi Channarayapatna Shankar, Frederik Jacobus Crous, Matthew Stewart Walker, Samuel George Mallinson, Paul Justin Reichl