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. 20, 2015
Filed:
May. 31, 2012
Yasunori Takei, Tokyo, JP;
Kenji Yabe, Yokohama, JP;
Takuma Kodoi, Kawasaki, JP;
Ken Ikegame, Ebina, JP;
Isamu Horiuchi, Yokohama, JP;
Hyou Takahashi, Kunitachi, JP;
Yasunori Takei, Tokyo, JP;
Kenji Yabe, Yokohama, JP;
Takuma Kodoi, Kawasaki, JP;
Ken Ikegame, Ebina, JP;
Isamu Horiuchi, Yokohama, JP;
Hyou Takahashi, Kunitachi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A print head includes an energy generating element, a chamber for accommodating liquid, and an ejection opening for ejecting liquid from the chamber, thus applying the energy to the liquid in the chamber from the energy generating element to eject the liquid from the ejection opening, wherein the ejection opening includes at least two projections convex to an inside of the ejection opening in a cross section perpendicular to a liquid ejecting direction and has a tapered angle Θin regard to the liquid ejecting direction, enabling a meniscus of the liquid to be formed therebetween at the liquid ejecting time, and an outer edge portion has a tapered angle Θin regard to the liquid ejecting direction, wherein the tapered angles Θand Θare defined to meet a formula of 0°≦Θ≦10° and a formula of Θ