The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 05, 1991
Filed:
Aug. 24, 1989
Takuro Sekiya, Yokohama, JP;
Kyuhachiro Iwasaki, Fujisawa, JP;
Takashi Kimura, Yokohama, JP;
Tomoaki Nakano, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
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.