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:
Oct. 22, 2019
Filed:
Aug. 31, 2018
Satoshi Kojima, Kanagawa, JP;
Satoshi Takahashi, Kanagawa, JP;
Tatsuru Moritani, Shizuoka, JP;
Shosuke Aoai, Kanagawa, JP;
Tatsuki Yamaguchi, Shizuoka, JP;
Satoshi Kojima, Kanagawa, JP;
Satoshi Takahashi, Kanagawa, JP;
Tatsuru Moritani, Shizuoka, JP;
Shosuke Aoai, Kanagawa, JP;
Tatsuki Yamaguchi, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
Provided is a toner including toner base particles and an external additive, wherein each of the toner base particles includes a binder resin, a release agent, and silica, an average abundance ratio (X) of the silica on a region adjacent to a surface of the toner base particle is from 70% through 90%, and a projected area average value S(180) per particle of the toner when the toner is heated to 180° C. and a projected area average value S(30) per particle of the toner when the toner is 30° C. satisfy Formula (1) below,1.4≤(180)/(30)≤1.7  Formula (1).