Thermal ink jet printhead with low density heaters

Details Thermal ink jet printhead with low density heaters Thermal ink jet printhead with low density heaters

2005-12-13

2005-12-13

Stephens, Juanita D. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S047000, C347S056000

Reexamination Certificate

active

06974210

ABSTRACT:
There is disclosed an ink jet printhead which comprises a plurality of nozzles and one or more heater elements corresponding to each nozzle. Each heater element is configured to heat a bubble forming liquid in the printhead to a temperature above its boiling point to form a gas bubble therein. The generation of the bubble causes the ejection of a drop of an ejectable liquid (such as ink) through the respective corresponding nozzle, to effect printing. Each heater element is formed of solid material, having a density less than 10 g/cm3.The temperature of an element is essentially related to the state of movement of the nuclei of the atoms. Accordingly, it requires more energy to raise the temperature, and thereby induce such a nucleus movement, in a material with atoms having heavier nuclei that in a material having atoms with lighter nuclei. Therefore heater elements with low densities require less energy to heat to an ink bubble nucleation temperature.

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patent: 6543879 (2003-04-01), Feinn et al.
patent: 3618534 (1986-12-01), None

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