1
Yutaka Ebi, Tadashi Fujii, Takuro Sekiya, Masanori Horike, Tatsuya Furukawa, Masaaki Tachiki: Ink jet printing apparatus. Ricoh Company, David G Alexander, March 12, 1985: US04504844 (22 worldwide citation)

An on-demand type ink jet printing apparatus which prints out data in various forms such as characters and numerals by the combination of dots formed by ink droplets on a sheet of paper. An ink ejection head of the printer includes control electrodes disposed in at least one ink passageway. Ink drop ...


2
Masanori Horike, Tatsuya Furukawa, Takuro Sekiya, Yutaka Ebi, Takuro Isayama, Masaaki Tachiki: Ink ejection head. Ricoh Company, David G Alexander, April 9, 1985: US04510509 (17 worldwide citation)

A new nozzle structure is disclosed for an ink ejection head of an electric field on-demand type ink jet printer. A plurality of circular nozzles and first electrodes integral with the nozzles are arranged along the widthwise direction (X direction) and feed direction (Y direction) of a sheet of pap ...