US Patent 7229151 Printhead assembly with mating printhead integrated circuits

A printhead assembly includes an elongate ink distribution structure having ink inlets to receive ink and longitudinally extending ink channels in fluid communication with the inlets. An elongate ink duct assembly is mounted on the ink distribution structure and defines a plurality of converging ink ducts with inlets in fluid communication with the ink channels. A plurality of elongate and serially arranged printhead integrated circuits is mounted on the ink duct assembly to receive ink from the ink ducts. Each printhead integrated circuit defines mating formations on respective ends to facilitate mating of consecutive printhead integrated circuits.