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Alfred I Pan, Howard H Taub, Harold W Levie: Ink jet head incorporating a thick unpassivated TaAl resistor. Hewlett Packard Company, June 5, 1990: US04931813 (74 worldwide citation)

A thermal ink jet head incorporates bubble-generating resistors, each with a relatively thick layer of unpassivated resistive material, such as TaAl. The thermal ink jet head includes an ink source, ink channels, respective orifices, and circuitry for providing the electrical energy which the resist ...


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Glenn H Rankin, Harold W Levie: Barriers for thermal ink jet printers. Hewlett Packard Company, Douglas A Kundrat, Joseph H Smith, February 26, 1985: US04502060 (52 worldwide citation)

A thermal ink jet print head is provided having a new and improved barrier design. Two barriers are provided for each resistor, the barriers partially surrounding the resistor. The barriers are spaced apart to provide ink feed channels to the resistor and are arranged to impart angular momentum to t ...