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:
Feb. 24, 2004
Filed:
May. 29, 2002
Hitoshi Arita, Yokohama, JP;
Kiyofumi Nagai, Machida, JP;
Akihiko Gotoh, Atsugi, JP;
Akiko Bannai, Tokyo, JP;
Tetsuya Kaneko, Yokohama, JP;
Nobutaka Osada, Mishima, JP;
Tomoko Maeda, Saitama, JP;
Masayuki Koyano, Zama, JP;
Kakuji Murakami, Atsugi, JP;
Toshiroh Tokuno, Yokohama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An ink for ink jet recording and an ink jet recording method which realize an image quality of laser printer on a plain paper in a one-pass printing mode under conditions of a volume of an ink droplet ejected being 5 to 43 Pico liter, a velocity of an ink droplet being 6 to 20 m/sec, frequency of 1 kHz and resolution of 300 dpi or more. The ink for ink jet recording is a penetrating type ink which includes (1) at least one humectant selected from glycerin, 1,3-butandiol, triethyleneglycol, 1,6-hexanediol, propyleneglycol, 1,5-pentanediol, diethyleneglycol, dipropyleneglycol, trimethylolpropane and trimethylolethane, (2) colorant contained in the amount of 6% by weight or more, (3) a polyol having 8 to 11 carbon atoms and glycolether, and an anionic surfactants or non-ionic surfactants, the ink has viscosity of 5 mPa·s or more at 25° C. and a surface tension of 40 mN/m or less.