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:
Sep. 08, 2015
Filed:
Dec. 15, 2011
Toru Takahashi, Abiko, JP;
Katsuhisa Yamazaki, Numazu, JP;
Shuhei Moribe, Mishima, JP;
Daisuke Yoshiba, Suntou-gun, JP;
Daisuke Tsujimoto, Toride, JP;
Masami Fujimoto, Suntou-gun, JP;
Toru Takahashi, Abiko, JP;
Katsuhisa Yamazaki, Numazu, JP;
Shuhei Moribe, Mishima, JP;
Daisuke Yoshiba, Suntou-gun, JP;
Daisuke Tsujimoto, Toride, JP;
Masami Fujimoto, Suntou-gun, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
To provide a toner that can keep its melt-sticking to sleeve from occurring and, even in double-sided printing, can keep high-temperature offset from occurring and obtain high-quality images on both the surface and the back. The toner comprises toner particles each of which contains a binder resin containing a resin formed by the reaction of i) a resin (A) having a softening point TA (° C.) of 70° C. to 105° C. and having a peak top of endothermic peaks at 55° C. to 120° C. with ii) a resin (B) having a softening point TB (° C.) of 120° C. to 160° C. and having a peak top of endothermic peaks at 55° C. to 120° C., and, in its viscoelasticity characteristics, has a storage elastic modulus at temperature 180° C. (G'180) of 3.0×10Pa to 3.0×10Pa, where the loss tangent tan δ has at least one peak having a peak top within the range of 50° C. to 70° C. and, when peak top temperature of the peak is represented by T(° C.), the loss tangent at T+10(° C.) [tan δ(T+10)] is 1.0 to 1.5 and the ratio of tan δ(T+10)/tan δ() is 0.8 to 1.5.