Patent ID: 7766470

Claim:
An ink jet printhead cartridge, comprising: a cartridge body including a base and a plurality of side walls extending upwardly from said base; a filter tower having a tower wall having an interior surface that defines a location of a tower passageway, said filter tower having a proximal end and a distal end, said proximal end being attached to said base; a printhead chip assembly attached to said base of said cartridge body in fluid communication with said tower passageway near said proximal end; a filter attached to said filter tower at said distal end; and an ink fill access port formed through a first side wall of said plurality of sidewalls, and through said tower wall of said filter tower between said proximal end and said distal end, to define a fluid path from the atmosphere external to said cartridge body to said tower passageway of said filter tower to facilitate the injection of ink directly into said filter tower during an ink filling operation for said ink jet printhead cartridge.