04504844 is referenced by 22 patents and cites 7 patents.

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 droplets are formed and caused to fly by electric fields developed in the vicinity of the control electrodes when voltages are applied thereacross. Multiport ink ejection is achieved by the provision of a plurality of ink passageways in the head. The voltage supply to the control electrodes is controllable so that ink droplets may be formed and caused into flight in response to print signals.

A channel defining each ink passageway can be shaped easily yet with accuracy utilizing an etching characteristic particular to a specific crystal face.

A plurality of acceleration electrodes may be employed to promote desirable flight of ink droplets. Further, a counter electrode may be located in the head to face the control electrodes so that the ink droplets will be formed and fly in a further efficient and stable manner.

Title
Ink jet printing apparatus
Application Number
6/433929
Publication Number
4504844
Application Date
October 12, 1982
Publication Date
March 12, 1985
Inventor
Masaaki Tachiki
Tokyo
JP
Tatsuya Furukawa
Yokohama
JP
Masanori Horike
Tokyo
JP
Takuro Sekiya
Yokohama
JP
Tadashi Fujii
Yokohama
JP
Yutaka Ebi
Kawasaki
JP
Agent
David G Alexander
Assignee
Ricoh Company
JP
IPC
G01D 15/16
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