Incremental printing of symbolic information – Ink jet – Ejector mechanism
Reexamination Certificate
2008-07-09
2009-11-17
Luu, Matthew (Department: 2861)
Incremental printing of symbolic information
Ink jet
Ejector mechanism
C347S042000, C347S049000
Reexamination Certificate
active
07618127
ABSTRACT:
A printer system is provided having a printhead including nozzles with bubble forming chambers, a heater element(s) disposed in each chamber configured for thermal contact with a bubble forming liquid, and drive circuitry corresponding to the nozzles for controlling operation of the heater elements via electrodes, such that the heater element forms a gas bubble in the liquid that causes drop ejection from the nozzle. Parts of the drive circuitry is disposed on opposing sides of the chambers. The heater element has a bubble nucleation section of smaller cross section than the rest of the heater element where the bubble nucleation section and the rest of the heater element are co-planar and remain co-planar when the heater element is heated. An actuation energy of less than 500 nanojoules is required to be applied to each heater element to heat it sufficiently to form the bubble.
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Fidler Shelby
Luu Matthew
Silverbrook Research Pty Ltd
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