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:
Aug. 21, 2012
Filed:
Mar. 30, 2009
Ryoichiro Kurobe, Kawasaki, JP;
Hideo Saikawa, Machida, JP;
Ryoichiro Kurobe, Kawasaki, JP;
Hideo Saikawa, Machida, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides an ink tank in which ink is unlikely to leak from an air communication hole even with variation in the internal pressure of the ink tank or an external impact on the ink tank. Specifically, ink attached to a rib or trapped in a groove may disperse to the vicinity of a projecting portion. In this case, first, a first groove is provided at a predetermined distance from the projecting portion, enabling a reduction in the possibility that the ink disperses from the groove or a remoter area to the projecting portion. Second, even if the dispersing ink enters an area surrounded by the groove, a second groove formed in the area allows the dispersing ink to be trapped therein.