Patent ID: 8807718

Claim:
An inkjet printhead assembly comprising: an inkjet printhead including: a nozzle array for ejecting ink drops, the nozzle array being disposed in a nozzle face of a printhead die; a printhead body including: a reservoir for ink; an ink inlet disposed proximate a top of the reservoir for supplying ink to the reservoir; and an ink outlet disposed proximate a bottom side of the reservoir for supplying ink from the reservoir to the nozzle array; a first valve disposed proximate the ink inlet of the printhead body; a valve opening and closing mechanism for the first valve including: an inflatable bag immersed in ink in the reservoir and having an opening to atmosphere; and a biasing mechanism tending to force air to exit the bag through the opening; and a filter disposed in the reservoir of the printhead body, wherein the filter is tilted relative to the nozzle face of the printhead die; a replaceable ink tank including: an ink chamber for storing a supply of ink; a vent to atmosphere; and a tank outlet disposed proximate a bottom side of the ink tank; a second valve disposed at the tank outlet; and an ink conduit for providing ink between the tank outlet and the ink inlet of the printhead body; wherein the ink chamber of the replaceable ink tank further includes: a first side extending from the bottom side of the ink tank, and a second side opposite the first side, wherein the second side is disposed proximate the printhead body, and wherein the tank outlet is disposed on the second side; wherein the printhead body further includes: a first side extending from the bottom side of the reservoir, wherein the first side of the printhead body is disposed proximate the second side of the replaceable ink tank; and a second side opposite the first side wherein an end of the filter disposed proximate the first side of the printhead body is located a first distance from the nozzle face of the printhead die, an end of the filter disposed proximate the second side of the printhead body is located a second distance from the nozzle face of the printhead die, and the first distance is greater than the second distance.