Nozzle arrangement with a pivotal wall coupled to a thermal expansion actuator

摘要

A nozzle arrangement for an inkjet printhead includes a substrate assembly defining an ink inlet channel. A nozzle chamber structure defines a nozzle chamber in fluid communication with the ink inlet channel. The nozzle chamber structure includes a roof defining an ink ejection port in fluid communication with the nozzle chamber. A pivotal wall is pivotally mounted with respect to the nozzle chamber structure. A paddle is cantilevered to the wall and extends into the nozzle chamber. An anchor extends from the substrate assembly at a location external the nozzle chamber. A thermal expansion actuator forms a bridge between the anchor and the pivotal wall which, upon actuation, expands to pivot the wall so that the paddle ejects ink in the nozzle chamber out through the ink ejection port.