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:
Dec. 08, 2009
Filed:
Aug. 20, 2007
Naoki Okamoto, Mishima, JP;
Tetsuya Ida, Mishima, JP;
Koh Ishigami, Mishima, JP;
Kazuo Terauchi, Numazu, JP;
Yojiro Hotta, Mishima, JP;
Noriyoshi Umeda, Susono, JP;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Naoki Okamoto, Mishima, JP;
Tetsuya Ida, Mishima, JP;
Koh Ishigami, Mishima, JP;
Kazuo Terauchi, Numazu, JP;
Yojiro Hotta, Mishima, JP;
Noriyoshi Umeda, Susono, JP;
Yoshinobu Baba, Yokohama, JP;
Takayuki Itakura, Mishima, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An object of the present invention is to provide a toner which: is excellent in fixing ability such as low-temperature fixability, hot offset property, and separability even in a fixing system excellent in quick start property and energy saving property; has high gloss; and is excellent in development stability and transferability irrespective of environments. The toner of the present invention includes toner particles each containing at least a binder resin and a colorant, in which, in a case where a tetrahydrofuran (THF) insoluble matter of the binder resin in the toner when the toner is subjected to Soxhlet extraction with THF for 2 hours is represented by A (mass %), a THF insoluble matter of the binder resin in the toner when the toner is subjected to Soxhlet extraction with THF for 4 hours is represented by B (mass %), a THF insoluble matter of the binder resin in the toner when the toner is subjected to Soxhlet extraction with THF for 8 hours is represented by C (mass %), and a THF insoluble matter of the binder resin in the toner when the toner is subjected to Soxhlet extraction with THF for 16 hours is represented by D (mass %), A, B, C, and D satisfy the following expression: (A−B)/2>(B−C)/4>(C−D)/8 where 40<A≦75 (mass %) and 1.0<D<40 (mass %).