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:
Apr. 19, 2005
Filed:
Mar. 20, 2003
Shuhei Moribe, Shizuoka, JP;
Hirohide Tanikawa, Shizuoka, JP;
Hiroshi Yusa, Tokyo, JP;
Takashige Kasuya, Shizuoka, JP;
Yoshihiro Ogawa, Shizuoka, JP;
Hideto Iida, Shizuoka, JP;
Katsuhisa Yamazaki, Shizuoka, JP;
Shuhei Moribe, Shizuoka, JP;
Hirohide Tanikawa, Shizuoka, JP;
Hiroshi Yusa, Tokyo, JP;
Takashige Kasuya, Shizuoka, JP;
Yoshihiro Ogawa, Shizuoka, JP;
Hideto Iida, Shizuoka, JP;
Katsuhisa Yamazaki, Shizuoka, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a toner having a polyester resin as a binder resin component, and a colorant, the toner contains (a) in the binder resin component, from 20.0% by weight to 65.0% by weight of a tetrahydrofuran-insoluble matter A1 in 6-hour extraction and from 35.0% by weight to 80.0% by weight of a tetrahydrofuran-soluble matter A2 in 6-hour extraction, (b) in the binder resin component, from 10.0% by weight to 30.0% by weight of a tetrahydrofuran-insoluble matter B1 in 16-hour extraction and from 70.0% by weight to 90.0% by weight of a tetrahydrofuran-soluble matter B2 in 16-hour extraction, and (c) in the binder resin component, from 0.5% by weight to 3.0% by weight of an orthodichloro-benzene-insoluble matter C1 in 6-hour extraction at 185° C. and from 97.0% by weight to 99.5% by weight of an orthodichlorobenzene-soluble matter C2 in 6-hour extraction at 185° C. The proportion of C1 to B1, C1/B1, is from 0.06 to 0.15, and the A1, B1 and C1 satisfy the following expression (1):A1>B1>C1.  Expression (1)A process cartridge makes use of this toner.