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:
Sep. 24, 2019
Filed:
May. 15, 2017
Canon Kabushiki Kaisha, Tokyo, JP;
Akiko Saito, Tokyo, JP;
Shintaro Kasai, Yokohama, JP;
Yoshiyuki Nakagawa, Kawasaki, JP;
Takatsugu Moriya, Tokyo, JP;
Koichi Ishida, Tokyo, JP;
Tatsuya Yamada, Kawasaki, JP;
Shuzo Iwanaga, Kawasaki, JP;
Ayako Iwasaki, Yokohama, JP;
Tomoki Ishiwata, Kawasaki, JP;
Tomohiro Sato, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A printing element substrate includes a substrate, an energy generating element, and an ejection-port formed member. The energy generating element is disposed on one surface of the substrate and configured to generate energy for use in ejecting liquid. The ejection-port formed member includes ejection ports that eject the liquid. A protrusion protruding toward inside of each of the ejection ports is provided on an inner surface of the ejection port. In a surface of the ejection-port formed member remote from the substrate, a tip portion of the protrusion is positioned closer to the substrate than an outer periphery of the ejection port.