Ink jet printhead assembly with non-emitting orifices

摘要

The invention is directed to an ink jet printhead assembly for jetting a supply of ink onto a print medium. A printhead includes a substrate and a plurality of heater elements mounted on the substrate. A nozzle plate is attached to the printhead. The nozzle plate and/or substrate includes an ink feed channel and a plurality of ink chambers. The nozzle plate includes a plurality of ink emitting orifices and a plurality of non-emitting orifices. Each ink emitting orifice is associated with a respective one of the ink chambers and is positioned adjacent to a respective one of the heater elements. Each ink chamber is in fluid communication with the ink feed channel at a first fluid port and in fluid communication with a respective one of the non-emitting orifices at a second fluid port.