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:
Aug. 03, 2010
Filed:
Jul. 29, 2008
Koh Ishigami, Mishima, JP;
Kazuo Terauchi, Numazu, JP;
Noriyoshi Umeda, Susono, JP;
Tetsuya Ida, Mishima, JP;
Naoki Okamoto, Mishima, JP;
Yojiro Hotta, Mishima, JP;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Takeshi Yamamoto, Yokohama, JP;
Manami Haraguchi, Yokohama, JP;
Kenta Kubo, Suntoh-gun, JP;
Koh Ishigami, Mishima, JP;
Kazuo Terauchi, Numazu, JP;
Noriyoshi Umeda, Susono, JP;
Tetsuya Ida, Mishima, JP;
Naoki Okamoto, Mishima, JP;
Yojiro Hotta, Mishima, JP;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Takeshi Yamamoto, Yokohama, JP;
Manami Haraguchi, Yokohama, JP;
Kenta Kubo, Suntoh-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A two-component developer containing a magenta toner and a magnetic carrier, wherein the magenta toner has the characteristics: (i) when the concentration of the magenta toner in a solution of the magenta toner in chloroform is represented by Cm (mg/ml) and the absorbance of the solution at a wavelength of 538 nm is represented by A538, a relationship between Cm and A538 satisfies the relationship of 2.00<A538/Cm<6.55; (ii) the lightness L* and chroma C* of the magenta toner determined in a powder state satisfy the relationships of 35≦L*≦45 and 60≦C*≦72; and (iii) the absolute value for the triboelectric charge quantity of the magenta toner measured by a two-component method using the magenta toner and the magnetic carrier is 50 mC/kg or more and 120 mC/kg or less.