Ink jet printhead chip with nozzle arrangements incorporating spaced actuating arms

An inkjet printhead chip that comprises

• a substrate;
• a plurality of nozzle arrangements positioned on the substrate, each nozzle arrangement comprising
• nozzle chamber walls that define a nozzle chamber and an ink ejection port in fluid communication with the nozzle chamber;
• an actuator that is connected to the substrate and is displaceable with respect to the substrate upon receipt of a control signal, the actuator being operatively positioned with respect to the nozzle chamber to eject ink from the ink ejection port on displacement of the actuator;
• wherein
• the actuator includes an actuating arm having at least one active portion that is configured to be displaced upon receipt of the control signal and at least one corresponding passive portion, the, or each, active portion being spaced from its corresponding passive portion in a plane that spans the substrate, so that spacing between the, or each, active portion and its corresponding passive portion is greater than one percent of a length of the actuating arm and less than twenty percent of the length of the actuating arm.