R
Robert R. Hay
Researcher at Hewlett-Packard
Publications - 16
Citations - 340
Robert R. Hay is an academic researcher from Hewlett-Packard. The author has contributed to research in topics: Body orifice & Barrier layer. The author has an hindex of 10, co-authored 16 publications receiving 339 citations.
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Patent
Thermal ink jet printhead with self-passivating elements
TL;DR: In this paper, a passivation layer in a thermal ink jet printhead is formed or grown by a reaction between the materials of the ink jet structure to be protected and an element which will form a chemically inert, electrically insulating, thermally conductive compound.
Patent
Barrier layer and orifice plate for thermal ink jet printhead assembly
C S Chan,Robert R. Hay +1 more
TL;DR: In this article, a thermal ink jet printhead and method of manufacture featuring an improved all-metal orifice plate and barrier layer assembly is described. But the assembly includes constricted ink flow ports to reduce cavitation damage and smooth contoured convergent ink ejection orifices to prevent "gulping" of air during an ink ejections.
Patent
Barrier layer and orifice plate for thermal ink jet print head assembly and method of manufacture
C. S. Chan,Robert R. Hay +1 more
TL;DR: In this article, a thermal ink jet printhead and method of manufacture featuring an improved all-metal orifice plate and barrier layer assembly is described, including constricted ink flow ports to reduce cavitation damage and smooth contoured convergent ink ejection orifices.
Patent
Nozzle test apparatus and method for thermal ink jet systems
Robert R. Hay,Paul R. Spencer +1 more
TL;DR: In this paper, an ink droplet appearing from an orifice will, for some brief moment, be in contact with both the orifice plate and the electrically conductive plate.
Patent
Resistor structures for thermal ink jet printers
TL;DR: In this article, a resistive heater is disclosed which comprises two spaced resistive elements (8′, 8″) separated by a gap so that the cavitation of an ink bubble occurs over the gap, thereby mini-consuming damage to the resistive element.