Patents by Inventor Joseph DeGroot

Joseph DeGroot 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, apparatus and printhead for continuous MEMS ink jets
    Patent number: 7712871
    Abstract: An embodiment relates generally to a method of ejecting ink. The method includes providing a continuous stream of ink from a pressurized fluid chamber and activating a drive signal to activate a micro-electrostatic mechanical system (MEMS) membrane. The method also includes stably breaking up the jet stream into uniform droplets in response to deflecting the MEMS membrane to perturb the continuous stream of ink.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: May 11, 2010
    Assignee: Xerox Corporation
    Inventors: Donald Drake, Joseph DeGroot, Andrew Hays
  • METHOD, APPARATUS AND PRINTHEAD FOR CONTINOUS MEMS INK JETS
    Publication number: 20080252693
    Abstract: An embodiment relates generally to a method of ejecting ink. The method includes providing a continuous stream of ink from a pressurized fluid chamber and activating a drive signal to activate a micro-electrostatic mechanical system (MEMS) membrane. The method also includes stably breaking up the jet stream into uniform droplets in response to deflecting the MEMS membrane to perturb the continuous stream of ink.
    Type: Application
    Filed: April 13, 2007
    Publication date: October 16, 2008
    Inventors: Donald Drake, Joseph DeGroot, Andrew Hays