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:
Apr. 20, 2010
Filed:
Sep. 24, 2007
Aqueous ink, ink jet recording method, ink cartridge, recording unit and ink jet recording apparatus
Kumiko Mafune, Kawasaki, JP;
Mikio Sanada, Kawasaki, JP;
Kenji Moribe, Fujisawa, JP;
Tomonari Watanabe, Kawasaki, JP;
Daiji Okamura, Yokohama, JP;
Satoshi Kudo, Yokohama, JP;
Fumiharu Nakamura, Kawasaki, JP;
Kumiko Mafune, Kawasaki, JP;
Mikio Sanada, Kawasaki, JP;
Kenji Moribe, Fujisawa, JP;
Tomonari Watanabe, Kawasaki, JP;
Daiji Okamura, Yokohama, JP;
Satoshi Kudo, Yokohama, JP;
Fumiharu Nakamura, Kawasaki, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided herein is an aqueous ink, which is excellent in both image density and fixing ability irrespective of the kind of a recording medium even when the volume of an ink droplet is small and has such excellent properties that white stripes are not caused even when high-speed recording is conducted. The aqueous ink comprises at least water, a water-soluble organic solvent, a water-insoluble coloring material, a surfactant and a poor medium for the water-insoluble coloring material and/or a salt. The dynamic surface tension of the aqueous ink at a lifetime of 50 milliseconds determined by a maximum bubble pressure method is higher than 47 mN/m, and the dynamic surface tension at a lifetime of 5,000 milliseconds determined by the maximum bubble pressure method is 38 mN/m or lower.