Patent ID: 6918647

Claim:
An inkjet printhead assembly which comprises a carrier; an ink supply assembly that is mounted on the carrier and defines a plurality of printhead chip receiving formations that are each dimensioned to engage a printhead chip and a plurality of ink supply conduits that terminate at the formations to supply ink to printhead chips engaged with the formations; a plurality of inkjet printhead chips that are engaged with respective said formations to receive the ink via passages defined by the printhead chips in fluid communication with respective ink supply conduits; and a rotary platen assembly that is mounted on the carrier, the rotary platen assembly comprising a shaft that is rotatably mounted on the carrier to be driven rotatably with respect to the carrier; a platen body that is mounted on the shaft, the platen body defining a platen surface for supporting sheets of a print medium as the printhead chips carry out a printing operation on the sheets, the shaft being rotatable to bring the platen surface into and out of alignment with the printhead chips; and a displacement mechanism that is arranged on the shaft and the carrier, the displacement mechanism being configured to permit the shaft and thus the platen surface to be laterally displaced into and out of an operative position with respect to the printhead chips.