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:
May. 11, 2010
Filed:
Jul. 25, 2005
Noriyuki Mizutani, Minamiashigara, JP;
Hideo Maehata, Minamiashigara, JP;
Hirokazu Hamano, Minamiashigara, JP;
Hiroyuki Tanaka, Minamiashigara, JP;
Moegi Iguchi, Minamiashigara, JP;
Soichiro Kitagawa, Minamiashigara, JP;
Susumu Yoshino, Minamiashigara, JP;
Yuka Ishihara, Minamiashigara, JP;
Yosuke Tsurumi, Minamiashigara, JP;
Akira Matsumoto, Minamiashigara, JP;
Masaru Takahashi, Minamiashigara, JP;
Noriyuki Mizutani, Minamiashigara, JP;
Hideo Maehata, Minamiashigara, JP;
Hirokazu Hamano, Minamiashigara, JP;
Hiroyuki Tanaka, Minamiashigara, JP;
Moegi Iguchi, Minamiashigara, JP;
Soichiro Kitagawa, Minamiashigara, JP;
Susumu Yoshino, Minamiashigara, JP;
Yuka Ishihara, Minamiashigara, JP;
Yosuke Tsurumi, Minamiashigara, JP;
Akira Matsumoto, Minamiashigara, JP;
Masaru Takahashi, Minamiashigara, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
A toner for developing electrostatic images, comprising a binder resin and a colorant, the binder resin including a crystalline polyester resin and an amorphous resin. When, in differential scanning calorimetry of the toner according to ASTM D3418-8, the temperature of the endothermic peak derived from the crystalline polyester resin in a first heating process is defined as Tm1 (° C.), the endothermic quantity based on the endothermic peak in the first heating process is defined as ΔH1 (mW/g), and the endothermic quantity based on the endothermic peak in a second heating process is defined as ΔH2 (mW/g), Tm1 is 50 to 80° C., and ΔH1 and ΔH2 satisfy the relationship represented by the following Formula (1). When the softening temperature of the toner is defined as T(° C.), Tfis 85 to 135° C. Tm1 and Tsatisfy the relationship represented by the following Formula (2):0.35≦Δ2/Δ1≦0.95  Formula (1)≦205−(1.4×1)  Formula (2).