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. 11, 2017
Filed:
Oct. 30, 2015
Applicants:
Satoshi Takahashi, Kanagawa, JP;
Yoshihiro Moriya, Shizuoka, JP;
Satoshi Kojima, Shizuoka, JP;
Masahiko Ishikawa, Shizuoka, JP;
Tatsuki Yamaguchi, Shizuoka, JP;
Inventors:
Satoshi Takahashi, Kanagawa, JP;
Yoshihiro Moriya, Shizuoka, JP;
Satoshi Kojima, Shizuoka, JP;
Masahiko Ishikawa, Shizuoka, JP;
Tatsuki Yamaguchi, Shizuoka, JP;
Assignee:
Ricoh Company, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03G 9/087 (2006.01); G03G 9/08 (2006.01);
U.S. Cl.
CPC ...
G03G 9/0827 (2013.01); G03G 9/0804 (2013.01); G03G 9/0819 (2013.01); G03G 9/0821 (2013.01); G03G 9/08795 (2013.01);
Abstract
A toner is provided. The toner includes a binder resin, a colorant, a release agent and an external additive. The toner has an average circularity of from 0.965 to less than 0.985. The toner has BET specific surface area of less than 1.20 m/g after liberation treatment of external additive.