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. 10, 2017
Filed:
Mar. 24, 2015
Ryota Inoue, Shizuoka, JP;
Yoshihiro Moriya, Shizuoka, JP;
Masahiko Ishikawa, Shizuoka, JP;
Satoshi Takahashi, Kanagawa, JP;
Tatsuki Yamaguchi, Shizuoka, JP;
Satoshi Kojima, Shizuoka, JP;
Ryota Inoue, Shizuoka, JP;
Yoshihiro Moriya, Shizuoka, JP;
Masahiko Ishikawa, Shizuoka, JP;
Satoshi Takahashi, Kanagawa, JP;
Tatsuki Yamaguchi, Shizuoka, JP;
Satoshi Kojima, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner including: binder resin; and release agent, wherein the release agent is 1% to 8% by mass to the toner, as equivalent mass of endothermic amount of the release agent determined by DSC, wherein the release agent present in region from surface of the toner to 0.3 μm depth is 0.1% to 4% by mass, as determined by FTIR-ATR, and wherein, in TEM image of torn surface of the toner, WDa<WDb<WDc is satisfied, WDa denoting number-average-particle-diameter of the release agent in region Aa that is from surface of the toner to depth that is one-sixth of diameter d of the toner (⅙d), WDc denoting number-average-particle-diameter of the release agent in central region Ac that is circular region having center located at center of the toner and radius of ⅙d, WDb denoting number-average-particle-diameter of the release agent in region Ab that is other than region Aa or Ac.