Inkjet printer comprising MEMS temperature sensors

Details Inkjet printer comprising MEMS temperature sensors Inkjet printer comprising MEMS temperature sensors

2006-02-07

2006-02-07

Tran, Huan (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S057000, C347S014000

Reexamination Certificate

active

06994426

ABSTRACT:
A printer comprising an inkjet printhead having an array of nozzles is provided. Each nozzle comprises a chamber for storing ink to be ejected, an aperture defined in a wall of the chamber, a thermal bend actuator for ejecting ink from the chamber through the aperture, a MEMS temperature sensor and drive circuitry for operating the thermal bend actuator. The drive circuitry is operable in two modes: a normal mode wherein drive signals to each actuator ejects ink from the corresponding chamber, and a preheat mode wherein drive signals to each actuator heats ink in the corresponding chamber but does not eject ink from the chamber. The preheat mode is selected by the printer if the MEMS temperature sensors sense that the ink is below a predetermined temperature threshold.

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