Patent ID: 6857728

Claim:
A pagewidth printhead chip that comprises a substrate that incorporates drive circuitry; and a plurality of nozzle arrangements that are positioned on the substrate, each nozzle arrangement comprising a static nozzle chamber structure that is positioned on the substrate to extend from the substrate and that defines part of a nozzle chamber; an active nozzle chamber structure that defines an ink ejection port and is configured to define a remaining part of the nozzle chamber, the active structure being displaceable with respect to the static structure towards and away from the substrate respectively to reduce and increase a volume of the nozzle chamber so that ink in the nozzle chamber is ejected from the ink ejection port; and at least two actuators that are connected to the drive circuitry and operatively arranged with respect to the active structure to displace the active structure towards and away from the substrate on receipt of an actuating electrical signal from the drive circuitry, the actuators being configured and connected to the active structure to impart substantially rectilinear movement to the active structure.