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:
Jul. 02, 2002
Filed:
Oct. 30, 1996
Haruyuki Matsumoto, Yokohama, JP;
Hajime Yamamoto, Yokohama, JP;
Mineo Kaneko, Yokohama, JP;
Tsuguhiro Fukuda, Yokohama, JP;
Masashi Miyagawa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet printing head for effecting printing by ejection of ink includes a first electrothermal transducer having a heat generating resistor with a first area and wiring electrically connected with the heat generating resistor; a second electrothermal transducer having a second heat generating resistor with an area which is different from the area of the first heat generating resistor; wherein bubbles are produced in ink materials upon application of electric signals to the electrothermal transducers, by which different volumes of ink materials are ejected; wherein the first and second electrothermal transducers have substantially the same bubble production threshold voltage.