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. 14, 2012
Filed:
Mar. 03, 2010
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 yellow toner and a magnetic carrier, wherein the yellow toner has the characteristics: (i) when the concentration of the yellow toner in a solution of the yellow toner in chloroform is represented by Cy (mg/ml) and the absorbance of the solution at a wavelength of 422 nm is represented by A422, a relationship between Cy and A422 satisfies the relationship of 6.00<A422/Cy<14.40; (ii) the lightness L* and chroma C* of the yellow toner determined in a powder state satisfy the relationships of 85.0≦L*≦95.0 and 100.0≦C*≦115.0; and (iii) the absolute value for the triboelectric charge quantity of the yellow toner measured by a two-component method using the yellow toner and the magnetic carrier is 50 mC/kg or more and 120 mC/kg or less.