Inkjet printhead employing nozzle paddle ink ejecting actuator

1. An inkjet printhead comprising:

a substrate defining a fluid chamber, the fluid chamber having a fluid outlet nozzle and a fluid supply channel respectively defined in opposite walls of the chamber;

a thermal actuator extending from outside of the fluid chamber into the fluid chamber via an aperture in a sidewall of the fluid chamber; and

a nozzle paddle terminating the thermal actuator and positioned within the fluid chamber, the nozzle paddle operatively displaceable upwards by the thermal actuator to eject ink from within the fluid chamber out through the fluid outlet nozzle, wherein

the fluid chamber is provided with a rim extending around an inner surface of the side wall, the rim partially protruding from the inner surface into the fluid chamber,

the rim is provided with a rim edge angled upwards towards the fluid outlet nozzle, and

the nozzle paddle is spaced from the rim edge to define a gap between an edge of the nozzle paddle and the rim edge, the gap facilitating ink flow from a side of the nozzle paddle facing the fluid supply channel to a side of the nozzle paddle facing the fluid outlet nozzle.

2. The inkjet printhead according to claim 1 , wherein the edge of the nozzle paddle is angled upwards towards the fluid outlet nozzle.

3. The inkjet printhead according to claim 1 , wherein the nozzle paddle is formed with a series of protrusions in a central portion thereof.

4. The inkjet printhead of claim 3 , wherein the series of protrusions of the paddle includes a plurality of truncated pyramidal protrusions.

5. The inkjet printhead of claim 3 , wherein the protrusions include a series of ridges, said ridges arranged with one of a parallel, concentric and an intersecting manner.

6. The inkjet printhead of claim 5 , wherein, and said ridges are shaped with one of an elliptical, circular, and arcuate shape.