Inkjet printhead device having nozzle guard and ink...

Details Inkjet printhead device having nozzle guard and ink... Inkjet printhead device having nozzle guard and ink...

2007-09-11

2007-09-11

Nguyen, Lamson (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S040000

Reexamination Certificate

active

11202347

ABSTRACT:
An inkjet printhead device includes a substrate that defines a plurality of ink passages. Drive circuitry is positioned on the substrate. A plurality of nozzle chamber structures is positioned on the substrate. Each nozzle chamber structure defines a nozzle chamber in fluid communication with at least one respective ink passage and an ink ejection port in fluid communication with the nozzle chamber. A plurality of actuators is connected to the drive circuitry and is operative to eject ink from respective nozzle chamber structures upon receipt of electrical signals from the drive circuitry. A nozzle guard is positioned on the substrate and is spaced from the nozzle chamber structures. The nozzle guard defines a plurality of apertures substantially aligned with respective ink ejection ports. A plurality of containment walls is interposed between the nozzle guard and the substrate and defines containment chambers. Each containment chamber encloses a nozzle chamber structure to confine leakage of ink to that nozzle chamber structure.

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