Patent ID: 8491112
Filing Date: 2013-07-23
Classification: B41J

Abstract:
1. An ink jet printhead, comprising: a cartridge body defining an ink reservoir for holding a supply of ink in a suspension body residing in a cavity; a filter tower with a tower wall defining an interior surface for a location of a tower passageway; a printhead chip assembly connected in fluid communication with said tower passageway, said filter tower defining a fluid conduit from the ink reservoir to the printhead chip assembly; a filter positioned in said filter tower for filtering fluid flowing thereby; and an ink fill access port formed through the tower wall to define a re-sealable fluid path from atmosphere external 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, wherein the ink fill access port resides beneath the ink reservoir and filter and above the printhead chip assembly during use to eject fluid downward from the printhead chip assembly.