Systems and methods for heating and measuring temperature of print head jet stacks

US10328691B2 · kind B2 · utility

Assignee

• Xerox Corporation · US

Inventors

• Curtis Douglass Keller · West Linn, US
• Gautam Dhar · Tigard, US
• David Lylell Knierim · Wilsonville, US
• Chad David Freitag · Portland, US
• Jonathan Robert Brick · Tualatin, US
• Douglas Dean Darling · Portland, US
• Nasser Alavizadeh · Tigard, US
• Bradford Stewart · Vancouver, US
• William Bruce Weaver · Beaverton, US

Key dates

• Filing date: Feb 15, 2018
• Grant date: Jun 25, 2019
• Expiry date: Feb 15, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B41J2/17593
• WIPO field: Textile and paper machines
• WIPO sector: Mechanical engineering

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.