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:
Jan. 01, 2013
Filed:
Sep. 28, 2010
Chiaki Muraoka, Kawaguchi, JP;
Yasushi Iijima, Tokyo, JP;
Tomotsugu Kuroda, Yokohama, JP;
Naoko Tsujiuchi, Kawasaki, JP;
Mikiya Umeyama, Tokyo, JP;
Masaki Oikawa, Inagi, JP;
Yuichiro Akama, Tokyo, JP;
Keiji Tomizawa, Yokohama, JP;
Chiaki Muraoka, Kawaguchi, JP;
Yasushi Iijima, Tokyo, JP;
Tomotsugu Kuroda, Yokohama, JP;
Naoko Tsujiuchi, Kawasaki, JP;
Mikiya Umeyama, Tokyo, JP;
Masaki Oikawa, Inagi, JP;
Yuichiro Akama, Tokyo, JP;
Keiji Tomizawa, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
To provide an inkjet head which includes high-density nozzle rows and which does not easily cause an ejection failure due to adhesion of ink mist around ejection orifices when a high-density image of a secondary color is printed with a small number of paths. An inkjet head includes at least two or more types of nozzle rows that eject different amounts of ink. When A is the cross section, with respect to an ink supplying direction, of an ink supply path from each ejection orifice to a supply port and L is the length of the ink supply path, the value of A/L differs between the two or more types of nozzle rows. The nozzle row of which the value of A/L is small is disposed outside an area between the nozzle rows that eject a largest amount of ink and that are arranged next to each other.