Efficient inkjet nozzle assembly

Details Efficient inkjet nozzle assembly Efficient inkjet nozzle assembly

2008-09-29

2010-12-14

Feggins, K. (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07850281

ABSTRACT:
An inkjet nozzle assembly comprising a nozzle chamber for containing ink, the chamber having a nozzle opening and an ink inlet; a pair of electrical contacts positioned at one end of the assembly and connected to drive circuitry; and a thermal bend actuator for ejecting ink through the nozzle opening, the actuator comprising: an active beam connected to the electrical contacts and extending longitudinally away from the contacts, the active beam defining a bent current flow path between the contacts; and a passive beam fused to the active beam, such that when a current is passed through the active beam, the active beam heats and expands relative to the passive beam resulting in bending of the actuator, wherein the actuator has a working face for generating a positive pressure pulse in the ink during the bending of the actuator, the working face having an area of less than 800 square microns.

REFERENCES:
patent: 2002/0171714 (2002-11-01), Silverbrook
patent: 2003/0103106 (2003-06-01), Silverbrook
patent: 2009/0278876 (2009-11-01), Mcavoy et al.
patent: 1419991 (2004-05-01), None

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