Inkjet printer with low nozzle to chamber cross-section ratio

Abstract

An inkjet drop ejection apparatus having a chamber with a nozzle; and, an actuator for ejecting drops of ink through the nozzle; wherein, the area defined by the nozzle is less than half a cross sectional area of the chamber. A chamber with a relatively large internal cross section will accommodate a large actuating surface. As the nozzle area is relatively small, the actuator need only move a small amount to force a drop out of the nozzle with sufficient kinetic energy. Smaller movements of the actuator are more energy efficient. Some designs can use the relatively large volume of ink in the chamber to cool the actuator and eventually remove the heat via the ejected drops.

Dependencies are inferred from the claim text.