The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 25, 2019
Filed:
Feb. 15, 2018
Xerox Corporation, Norwalk, CT (US);
Curtis Douglass Keller, West Linn, OR (US);
Gautam Dhar, Tigard, OR (US);
David Lylell Knierim, Wilsonville, OR (US);
Chad David Freitag, Portland, OR (US);
Jonathan Robert Brick, Tualatin, OR (US);
Douglas Dean Darling, Portland, OR (US);
Nasser Alavizadeh, Tigard, OR (US);
Bradford Stewart, Vancouver, WA (US);
William Bruce Weaver, Canby, OR (US);
XEROX CORPORATION, Norwalk, CT (US);
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.