Symmetrically actuated ink ejection components for an ink jet printhead chip.

摘要

A printhead chip for an ink jet printhead includes a substrate. A plurality of nozzle arrangements is positioned on the substrate. Each nozzle arrangement has an active ink ejection structure that is positioned on the substrate and spaced from the substrate. The active ink ejection structure has a roof with an ink ejection port defined in the roof. A static ink ejection structure is positioned on the substrate. The active ink ejection structure and the static ink ejection structure together define a nozzle chamber in fluid communication with an ink supply. The active ink ejection structure is displaceable with respect to the static ink ejection structure towards and away from the substrate to reduce and increase a volume of the nozzle chamber to eject an ink drop from the nozzle chamber. At least two actuators are operatively arranged with respect to the active ink ejection structure to displace the active ink ejection structure with respect to the static ink ejection structure towards and away from the substrate. The actuators are configured and connected to the active ink ejection structure to impart substantially rectilinear movement to the active ink ejection structure.