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. 10, 2007
Filed:
Jun. 23, 2004
Hiroshi Ito, Nagano-Ken, JP;
Kazuaki Watanabe, Nagano-Ken, JP;
Tsuyoshi Sano, Nagano-Ken, JP;
Bunji Ishimoto, Nagano-Ken, JP;
Kiyohiko Takemoto, Nagano-Ken, JP;
Hiroshi Ito, Nagano-Ken, JP;
Kazuaki Watanabe, Nagano-Ken, JP;
Tsuyoshi Sano, Nagano-Ken, JP;
Bunji Ishimoto, Nagano-Ken, JP;
Kiyohiko Takemoto, Nagano-Ken, JP;
Seiko Epson Corporation, Tokyo, JP;
Abstract
An object of the present invention is to provide an ink compositions which, when used with an ink jet recording apparatus, can realize excellent ink ejection stability while maintaining safety and satisfactory penetration of ink. The ink composition according to the present invention comprises at least a colorant, a humectant, a glycol monoether as a penetrating agent, a 1,2-alkanediol, and water, the weight ratio of the glycol monoether to the 1,2-alkanediol being in the range of 1:5 to 5:1. According to another aspect of the present invention, there is provided an ink composition comprising at least a pigment, a dispersant for dispersing the pigment, a 1,2-alkanediol, and water as a main solvent, the content of the 1,2-alkanediol being 0.5 to 10% by weight based on the total amount of the ink composition.