Patent ID: 8079684

Claim:
An ink storage module for a pagewidth printer cartridge, said module comprising: upper and lower plate members that are displaceable towards each other in a displacement direction and away from each other in a direction opposite the displacement direction; an ink bag located between the plate members to define an ink volume; a bag constrictor assembly engaged with said plate members, and configured to restrict the bag in directions perpendicular to the displacement direction to reduce the ink volume when the plate members are selectively displaced towards each other in the displacement direction by an external force; a biasing mechanism engaged with the plate members to bias the plate members away from each other such that a negative pressure is maintained in the ink volume in the absence of the external force; and a lid engaged with the plate members and bag constrictor assembly, the lid having at least one port in fluid communication with the bag, to deliver ink to a printhead or to facilitate refilling said bag with ink.