Patent ID: 7891789

Claim:
An ink priming arrangement for an inkjet printhead, the inkjet printhead having a plurality of ink ejection nozzles, the priming arrangement comprising: an ink bag containing ink for distribution to the nozzles via a fluid path between the ink bag and the nozzles; a force applicator arranged to apply inwardly directed force on at least one exterior wall of the ink bag so as to reduce an available fluid volume of the ink bag, thereby causing ink to flow from the ink bag to the nozzles along the fluid path; and a leaf spring arranged in the ink bag to apply outwardly directed force on at least one interior wall of the ink bag so as to restrain the reduction of available fluid volume of the ink bag, wherein the leaf spring is configured to float freely inside the bag at an initial full volume such that the leaf spring is disengaged from the ink bag at the initial full volume, and wherein the leaf spring is configured to engage with the ink bag and apply the outwardly directed force only once the available fluid volume of the ink bag has been reduced to a predetermined volume.