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:
Feb. 23, 2016
Filed:
Aug. 10, 2012
Keiji Tomizawa, Yokohama, JP;
Masaki Oikawa, Inagi, JP;
Keiji Tomizawa, Yokohama, JP;
Masaki Oikawa, Inagi, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The print head includes an energy generating element, a chamber for accommodating liquid, and an ejection opening arranged in a position corresponding to the energy generating element. The ejection opening includes at least one projection projecting inside of the ejection opening, the ejection opening having a first region between a front end of the projection and an inner wall of the ejection opening positioned at the shortest distance from the front end, and second regions positioned on both sides of the projection and different from the first region, and when a width of the projection at a chamber-side opening face is represented as aand the maximum width of the projection is represented as a, a relation a<ais established and the width of the projection decreases gradually or step by step from a position having the width of ato the chamber-side opening face.