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:
Jun. 18, 2002
Filed:
Jan. 19, 2000
Fujitsu Limited, Kawasaki, JP;
Abstract
It is an exemplified object of the present invention to provide such ink that maintains dispersive and preservative stabilities suitable for inkjet ink, an ink storage storing the ink, and a recording device using the ink. The ink of the present invention is aqueous dispersoid ink comprising at least water, a water-soluble organic solvent and a colorant, and the composition thereof is as follows. A ratio R of Kt to Ko (=Kt/Ko) satisfies R≦5, where Ko (=Dm/Do) is a ratio of a maximum particle diameter Dm to an average particle diameter Do in said ink, both of which diameters are measured by detecting backscattering light and converting the detection result into a particle diameter under a dynamic light scattering method as a measurement principle. Kt (=Tm/To) is a ratio of a maximum particle diameter Tm to an average particle diameter To in the ink that has been preserved for six months at a constant temperature of 50° C., both of which diameters are measured by the principle and detection method.