Patent ID: 7874640

Claim:
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.