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:
Sep. 14, 2011
Mamoru Hozumi, Miyagi, JP;
Tsuyoshi Sugimoto, Shizuoka, JP;
Naohiro Watanabe, Shizuoka, JP;
Tomoyuki Satoh, Kanagawa, JP;
Shinya Hanatani, Shizuoka, JP;
Osamu Uchinokura, Shizuoka, JP;
Kiwako Hirohara, Miyagi, JP;
Mamoru Hozumi, Miyagi, JP;
Tsuyoshi Sugimoto, Shizuoka, JP;
Naohiro Watanabe, Shizuoka, JP;
Tomoyuki Satoh, Kanagawa, JP;
Shinya Hanatani, Shizuoka, JP;
Osamu Uchinokura, Shizuoka, JP;
Kiwako Hirohara, Miyagi, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner containing toner particles, each toner particle containing: a releasing agent; a colorant; and a binder resin containing at least a crystalline polyester resin and a non-crystalline polyester resin, wherein in the case where a volume average particle diameter of the toner is defined as Dv, the toner contains a group of the toner particles having 4/5 Dv, and a group of the toner particles having 6/5 Dv, and wherein an endothermic value A of the crystalline polyester resin at a first temperature increase in DSC of the toner, an endothermic value B of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particle having 4/5 Dv, and an endothermic value C of the crystalline polyester resin at a first temperature increase in DSC of the group of the toner particles having 6/5 Dv satisfy the relation represented by the following formulas:50<()×100<90, and110<()×100<150.