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:
Jun. 03, 2014
Filed:
Jan. 14, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Shuntaro Watanabe, Hadano, JP;
Kenji Aoki, Mishima, JP;
Tetsuya Kinumatsu, Numazu, JP;
Takaaki Kaya, Suntou-gun, JP;
Atsushi Tani, Suntou-gun, JP;
Ayako Okamoto, Wako, JP;
Toshifumi Mori, Suntou-gun, JP;
Yoshihiro Nakagawa, Numazu, JP;
Takashige Kasuya, Numazu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
Provided is a toner having an excellent low-temperature fixability and hot offset resistance, a broad fixing temperature latitude in low-temperature areas to high-temperature areas, and a high heat-resistant storage stability. The toner includes toner particles having a core-shell structure in which a shell phase containing a resin A is formed on a core containing a binder resin, a colorant and a wax. In measurement of resin A by a differential scanning calorimetry (DSC), the peak temperature TpA (° C.) of a maximum endothermic peak in the first temperature rise is at least 55° C. but not more than 80° C. In measurement of a viscoelasticity of resin A, the loss elastic modulus at TpA−10 (° C.) is at least 1×10Pa but not more than 1×10Pa. In measurement of the viscoelasticity of resin A, the loss elastic moduli at TpA (° C.), TpA+10 (° C.) and TpA+25 (° C.) satisfy specific conditions.