Patent ID: 7284833

Claim:
A fluid ejection chip that comprises: a substrate; and a plurality of nozzle arrangements positioned on the substrate, each nozzle arrangement comprising: a nozzle chamber defining structure which defines a nozzle chamber and which includes a wall in which a fluid ejection port is defined; and a series of thermal bend actuators arranged to extend from the nozzle chamber to the fluid ejection port so as to define said wall between the nozzle chamber and fluid ejection port; wherein, the thermal bend actuators are configured to be activated on receipt of an electrical signal so as to all be displaced toward the substrate in order to reduce the volume of the nozzle chamber and be deactivated upon removal of the electrical signal so as to all be displaced back to their original positions in order to restore the volume of the nozzle chamber, thereby causing ejection of fluid through the fluid ejection port.