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:
Jan. 25, 2005
Filed:
Nov. 28, 2001
Applicants:
Shinichi Sato, Kanagawa, JP;
Tetsuji Kurata, Kanagawa, JP;
Inventors:
Shinichi Sato, Kanagawa, JP;
Tetsuji Kurata, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41J 2175 ;
U.S. Cl.
CPC ...
Abstract
An ink tank includes an ink container containing an ink, an ink inlet for introducing the ink to the ink container, an air outlet for maintaining the ink container under negative pressure, and a gas-liquid separation mechanism provided at the air outlet which passes gas but not liquid. The ink is introduced to the ink container through the ink inlet by the negative pressure in the ink container, an inner surface of which being surface-processed, and the ink has surface tension of 28 mN/m or higher but not higher than 50 mN/m.