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:
Nov. 29, 2022
Filed:
Dec. 04, 2020
Canon Kabushiki Kaisha, Tokyo, JP;
Tomonobu Saku, Tochigi, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A liquid ejection device includes: a liquid ejection unit with an ejection port surface provided with an ejection port from which liquid is ejected and configured to eject the liquid onto a substrate at an ejection position; an image capturing mechanism configured to face the ejection port surface of the liquid ejection unit and to capture an image of the ejection port surface at a maintenance position different from the ejection position; and a lighting unit configured to irradiate the ejection port surface at multiple incidence angles with respect to the ejection port surface in an operation of capturing an image of the ejection port surface by the image capturing mechanism.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile