A pagewidth inkjet printhead assembly has a plurality of nozzle arrangements. Each nozzle arrangement comprises walls defining an ink chamber having an ink supply channel and an ink ejection port having an ink spreading prevention rim; a thermal actuator mechanism for ejecting ink from the chamber via...http://www.google.de/patents/US7950771?utm_source=gb-gplus-sharePatent US7950771 - Printhead nozzle arrangement with dual mode thermal actuator
Printhead nozzle arrangement with dual mode thermal actuator
