Patents by Inventor DAVID LYLELL KNIERIM

DAVID LYLELL KNIERIM 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).

  • Systems and methods for heating and measuring temperature of print head jet stacks
    Patent number: 10328691
    Abstract: A print head has a jet stack, a jet stack heating and temperature measuring element thermally connected to the jet stack, the jet stack heating and temperature measuring element including: a first, etched copper layer having heat spreading characteristics and including a resistive heat source electrically connected in series to a voltage source and a switch; an electrically insulative on a back side of the first copper layer; and a second, etched copper layer on a side of the electrically insulative layer opposite the first copper layer, the second copper layer having a temperature sensing element to sense a temperature of the print head without a thermistor, the temperature sensing element connected in series with a voltage source and a transistor. A print head may use a thermistor but the heat spreading layer eliminates the need for a heat sink to attach to the print head.
    Type: Grant
    Filed: February 15, 2018
    Date of Patent: June 25, 2019
    Assignee: XEROX CORPORATION
    Inventors: Curtis Douglass Keller, Gautam Dhar, David Lylell Knierim, Chad David Freitag, Jonathan Robert Brick, Douglas Dean Darling, Nasser Alavizadeh, Bradford Stewart, William Bruce Weaver
  • SYSTEMS AND METHODS FOR HEATING AND MEASURING TEMPERATURE OF PRINT HEAD JET STACKS
    Publication number: 20180170041
    Abstract: A print head has a jet stack, a jet stack heating and temperature measuring element thermally connected to the jet stack, the jet stack heating and temperature measuring element including: a first, etched copper layer having heat spreading characteristics and including a resistive heat source electrically connected in series to a voltage source and a switch; an electrically insulative on a back side of the first copper layer; and a second, etched copper layer on a side of the electrically insulative layer opposite the first copper layer, the second copper layer having a temperature sensing element to sense a temperature of the print head without a thermistor, the temperature sensing element connected in series with a voltage source and a transistor. A print head may use a thermistor but the heat spreading layer eliminates the need for a heat sink to attach to the print head.
    Type: Application
    Filed: February 15, 2018
    Publication date: June 21, 2018
    Inventors: CURTIS DOUGLASS KELLER, GAUTAM DHAR, DAVID LYLELL KNIERIM, CHAD DAVID FREITAG, JONATHAN ROBERT BRICK, DOUGLAS DEAN DARLING, NASSER ALAVIZADEH, BRADFORD STEWART, WILLIAM BRUCE WEAVER