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:
Apr. 24, 2012
Filed:
Mar. 24, 2008
Keiji Tomizawa, Yokohama, JP;
Mineo Kaneko, Tokyo, JP;
Ken Tsuchii, Sagamihara, JP;
Toru Yamane, Yokohama, JP;
Masaki Oikawa, Inagi, JP;
Mitsuhiro Matsumoto, Yokohama, JP;
Naozumi Nabeshima, Tokyo, JP;
Shuichi Ide, Tokyo, JP;
Kansui Takino, Kawasaki, JP;
Keiji Tomizawa, Yokohama, JP;
Mineo Kaneko, Tokyo, JP;
Ken Tsuchii, Sagamihara, JP;
Toru Yamane, Yokohama, JP;
Masaki Oikawa, Inagi, JP;
Mitsuhiro Matsumoto, Yokohama, JP;
Naozumi Nabeshima, Tokyo, JP;
Shuichi Ide, Tokyo, JP;
Kansui Takino, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides a print head that allows the characteristics of ejected ink to be adjusted for each ejection port in spite of a variation in the distance from an ink supply port to the heating element. In the print head according to the present invention, the area of the heating element decreases with increasing distance from the ink supply port and increases with decreasing distance from the ink supply port. The heating element is shaped like a rectangle that is longer in a direction orthogonal to a direction in which the plurality of ejection ports are arranged than in the direction in which the plurality of ejection ports are arranged. The aspect ratio of the heating element depends on the length of an ink channel through which ink is introduced into the bubbling chamber.