Patent ID: 8061814

Claim:
A nozzle arrangement for ejecting ink, the nozzle arrangement comprising: a substrate defining an ink supply passage; a first endless wall extending from the substrate and bounding the ink supply passage; an elongate actuator operatively anchored at a fixed end to the substrate and at a location external to the confines of the first endless wall, the actuator configured to reciprocally bend towards and away from the substrate on receipt of an electrical current; and a cover terminating a free end of the actuator, the cover defining a second endless wall suspended from the cover within the confines of the first endless wall to define an ink chamber with the first endless wall, the cover further defining an ink ejection port through which ink in the ink chamber is ejected, wherein the reciprocal bending of the actuator towards and away from the substrate varies a volume of the ink chamber and effects ejection of ink from the ink chamber through the ink ejection port, and the first and second endless walls define a gap therebetween, a width of the gap being conducive to the formation of a fluidic seal effected via surface tension of the ink.