Patent ID: 7267428
Filing Date: 2007-09-11
Classification: B41J

Abstract:
1. An inkjet printhead device which comprises a substrate that defines a plurality of ink passages; drive circuitry positioned on the substrate; a plurality of nozzle chamber structures positioned on the substrate, each nozzle chamber structure defining 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 connected to the drive circuitry and operative to eject ink from respective nozzle chamber structures upon receipt of electrical signals from the drive circuitry; a nozzle guard that is positioned on the substrate and spaced from the nozzle chamber structures, the nozzle guard defining a plurality of apertures substantially aligned with respective ink ejection ports; and a plurality of containment walls interposed between the nozzle guard and the substrate and defining containment chambers, each containment chamber enclosing at least one nozzle chamber structure to confine leakage of ink to said respective at least one nozzle chamber structure; wherein each nozzle chamber structure includes a movable structure with a crown portion that defines the ink ejection port and a skirt portion that depends from the crown portion and a wall portion that bounds the associated ink passage, the movable structure being displaceable towards the substrate with the skirt portion overlapping the wall portion and away from the substrate so that ink is ejected from the ink ejection port.