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:
Jul. 16, 2013
Filed:
Aug. 12, 2011
Nobuhiro Kitabatake, Kawasaki, JP;
Yoshinori Nakagawa, Kawasaki, JP;
Yuji Hamasaki, Kawasaki, JP;
Atsushi Takahashi, Kawasaki, JP;
Kei Yoshizawa, Tokyo, JP;
Nobuhiro Kitabatake, Kawasaki, JP;
Yoshinori Nakagawa, Kawasaki, JP;
Yuji Hamasaki, Kawasaki, JP;
Atsushi Takahashi, Kawasaki, JP;
Kei Yoshizawa, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The inkjet printer can discharge a bubble in an ink flow path while suppressing ink consumption. Ink in an ink tank is supplied to a printing head through a flow path and filter. Bubbles in the flow path and printing head are discharged by applying a negative pressure to an ejection port of the printing head. At this time, after a first negative pressure has been applied to the ejection port with an on/off valve provided between the ink tank and the filter being closed, the on/off valve is opened to discharge the ink from the ejection port. Further, after that, a second negative pressure at a level that makes it difficult for a bubble to pass through the filter is applied to the ejection port to discharge a bubble present at a location, which is closer to the printing head than the filter is to printing head, from the ejection port together with the ink.