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:
May. 19, 1998
Filed:
Nov. 26, 1996
Takuro Sekiya, Yokohama, JP;
Takayuki Yamaguchi, Minoo, JP;
Mitsuru Shingyouchi, Yokohama, JP;
Makoto Obu, Yokohama, JP;
Michio Umezawa, Kawasaki, JP;
Tetsuro Hirota, Hadano, JP;
Takesada Hirose, Machida, JP;
Hideki Ohtsuki, Fujisawa, JP;
Toshihiro Takesue, Tokyo, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink jet recording apparatus includes a recording head for ejecting droplets of ink and a driving circuit for driving the recording head. The recording head includes a base, a plate on which a plurality of openings are formed; an ink chamber to be filled with ink being formed between the base and the plate; and heater elements, provided in the ink chamber so as to face the openings of the plate, each of which heater elements supplies heat energy to ink adjacent thereto so that the air bubble is generated on each of the heater elements and so that the air bubble grows toward a corresponding one of the openings. An area of each of the openings of the plate is greater than an area each of the heater elements. When the driving circuit activates each of the heater elements, a droplet of ink is ejected due to the air bubble from the corresponding one of the openings of the plate.