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:
Feb. 14, 2012
Filed:
May. 09, 2008
Shinya Nakayama, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Akiyoshi Sabu, Numazu, JP;
Hiroshi Yamashita, Numazu, JP;
Hiroshi Yamada, Numazu, JP;
Junichi Awamura, Numazu, JP;
Tsuyoshi Sugimoto, Mishima, JP;
Shinya Nakayama, Numazu, JP;
Akihiro Kotsugai, Numazu, JP;
Akiyoshi Sabu, Numazu, JP;
Hiroshi Yamashita, Numazu, JP;
Hiroshi Yamada, Numazu, JP;
Junichi Awamura, Numazu, JP;
Tsuyoshi Sugimoto, Mishima, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The present invention provides a toner containing at least a binder resin, a releasing agent, and a colorant, wherein the binder resin contains at least a polyester resin (A) having a softening point Tm (A) of 120° C. to 160° C., a polyester resin (B) having a softening point Tm (B) of 80° C. or more and less than 120° C. and a composite resin (C) containing a condensation polymerization monomer and an addition polymerization monomer, at least any one of the polyester resins (A) and (B) is a polyester resin prepared by condensation-polymerizing an alcohol component substantially composed of only aliphatic alcohol with a carboxylic acid component, and 65% or more of the alcohol component is 1,2-propanediol.