Recorders – Markers and/or driving means therefor – With ink supply to marker
Patent
1989-08-24
1991-02-05
Hartary, Joseph W.
Recorders
Markers and/or driving means therefor
With ink supply to marker
B41J 205
Patent
active
049909398
ABSTRACT:
A bubble jet printer head comprises a base plate, an ink chamber provided on the phase plate, a device for supplying ink to the ink chamber, an ink passage provided on the base plate from the ink chamber to an orifice at a front end, and a heating element at the ink passage for heating the ink to form a bubble. The heating element includes a first electrode strip extending on the base plate to the ink chamber along the ink passage, an electrical insulator layer covering the first electrode strip except for the front and rear ends thereof, the electrical insulator layer having a front end facing the orifice, a resistance strip provided on the electrical insulator layer and having a front end in contact with the front end of the first electrode strip and extending rearwardly along and over the electrical insulator layer, and a second electrode strip provided on the electrical insulator layer in contact with the rear end of the resistance strip and extending rearwardly to the ink chamber along and over the electrical insulator layer.
REFERENCES:
patent: 4392907 (1983-07-01), Shirato
patent: 4458256 (1984-07-01), Shirato
patent: 4663640 (1987-05-01), Ikeda
patent: 4686544 (1987-08-01), Ikeda
Iwasaki Kyuhachiro
Kimura Takashi
Nakano Tomoaki
Sekiya Takuro
Hartary Joseph W.
Ricoh & Company, Ltd.
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