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. 01, 2009
Filed:
Apr. 20, 2006
Yoshihiro Ogawa, Numazu, JP;
Yusuke Hasegawa, Sunto-gun, JP;
Tomohisa Sano, Sunto-gun, JP;
Junko Nishiyama, Sunto-gun, JP;
Miho Okazaki, Susono, JP;
Takashige Kasuya, Sunto-gun, JP;
Koji Nishikawa, Sunto-gun, JP;
Yoshihiro Ogawa, Numazu, JP;
Yusuke Hasegawa, Sunto-gun, JP;
Tomohisa Sano, Sunto-gun, JP;
Junko Nishiyama, Sunto-gun, JP;
Miho Okazaki, Susono, JP;
Takashige Kasuya, Sunto-gun, JP;
Koji Nishikawa, Sunto-gun, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The invention is to provide a toner excellent in fixing property, high-temperature offset resistance and blocking resistance, and having an excellent developing property. The invention provides a toner including at least a binder resin and a colorant, wherein: the binder resin contains a hybrid resin which contains a polyester-type resin unit by 50 mass % or more and in which a polyester-type resin component and a vinyl-type resin component are chemically bonded; the toner contains 3 to 50 mass % of a tetrahydrofuran-insoluble matter derived from the binder resin; the tetrahydrofuran-insoluble matter contains a hybrid resin; and a tetrahydrofuran-soluble matter, obtained by hydrolyzing the tetrahydrofuran-insoluble matter and separating by filtration, has, in a GPC-measured molecular weight distribution, a main peak within a molecular weight range of 50,000 to 500,000.