Patents by Inventor Kerry Lundsten

Kerry Lundsten 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 establishing ink-jet printhead operating energy from an optical determination of turn-on energy
    Patent number: 6244682
    Abstract: A method and apparatus for optical determination of turn-on energy and operational printhead energy for ink-jet printing includes a computerized method for using reflectance readings from a test pattern generated by a printhead under test. The test pattern includes regions (|1|−|N|) generated by applying to the printhead ink drop generators firing pulses having a pulse energy substantially equal to a predetermined reference pulse energy at a predetermined pulse frequency starting with a pulse energy substantially equal to the predetermined reference energy and incrementally changing the pulse energy of the firing pulses such that firing pulses of increasing or decreasing pulse energies are sequentially applied to the drop generators.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: June 12, 2001
    Assignee: Hewlett-Packard Company
    Inventors: Steven H Walker, Kerry Lundsten