Nozzle arrangent with movable ink ejection structure

摘要

A nozzle arrangement is provided for an ink jet printhead. The nozzle arrangement includes a wafer substrate arrangement. The wafer substrate arrangement defines an ink inlet channel and a first wall surrounding the ink inlet channel. A movable ink ejection structure defines an ink ejection port and another wall surrounding the first wall. The wafer substrate arrangement and ink ejection structure together define a nozzle chamber in fluid communication with the ink inlet channel and the ink ejection port. A plurality of thermal bend actuators movably couples the ink ejection structure to the wafer substrate arrangement. Each actuator includes an arm which can move the ink ejection structure responsive to an applied electrical signal. In use, the volume of the nozzle chamber is varied and ink is ejected through the ink ejection port.