Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Yasuhito Mori0
Kouhei Nakagawa0
Mikio Sanada0
Satomi Yanagimachi0
Kenji Moribe0
Date of Patent
July 12, 2011
0Patent Application Number
121019100
Date Filed
April 11, 2008
0Patent Primary Examiner
Patent abstract
An ink jet recording ink tank includes: an ink retention member, which to hold ink exerts a negative pressure through capillary force; and ink, which is retained in the ink retention member, for which a dynamic surface tension in a lifetime of 50 msec, obtained by a maximum bubble pressure method, is higher than an interfacial tension of the ink retention member, a dynamic surface tension in a lifetime of 5000 msec is lower than the interfacial tension of the ink retention member, and a difference between the dynamic surface tension in the lifetime of 50 msec and the dynamic surface tension in the lifetime of 5000 msec is equal to or greater than 8 mN/m.
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