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. 05, 2016
Filed:
Dec. 15, 2014
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Chie Maruyama, Matsumoto, JP;
Minharu Kanaya, Azumino, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
B41J 2/01 (2006.01); C09D 11/324 (2014.01); B41J 2/21 (2006.01); B41J 2/015 (2006.01); C09D 11/02 (2014.01); C09D 133/02 (2006.01); C08K 5/053 (2006.01); C09D 11/36 (2014.01); C09D 125/14 (2006.01);
U.S. Cl.
CPC ...
C09D 11/324 (2013.01); B41J 2/015 (2013.01); B41J 2/2107 (2013.01); C08K 5/053 (2013.01); C09D 11/02 (2013.01); C09D 11/36 (2013.01); C09D 125/14 (2013.01); C09D 133/02 (2013.01);
Abstract
Provided is a black ink composition containing a pigment, wherein the value calculated from the average particle diameter and the particle size distribution width of the pigment and the ink viscosity is regulated within a certain range, and the number of coarse particles contained in the ink composition is regulated to a certain value or less. The ink composition is excellent in ink storage stability and can give an image realized with good balance between color development, in particular, in high-speed printing and inhibition of a time-dependent change in printing density due to pigment sedimentation.