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:
May. 28, 2019
Filed:
Feb. 06, 2018
Akira Tanaka, Shizuoka, JP;
Hiroyuki Takeda, Kanagawa, JP;
Junichi Awamura, Shizuoka, JP;
Hiroshi Yamada, Shizuoka, JP;
Daichi Hisakuni, Shizuoka, JP;
Yasuo Kamada, Kanagawa, JP;
Akira Tanaka, Shizuoka, JP;
Hiroyuki Takeda, Kanagawa, JP;
Junichi Awamura, Shizuoka, JP;
Hiroshi Yamada, Shizuoka, JP;
Daichi Hisakuni, Shizuoka, JP;
Yasuo Kamada, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner is provided. The toner contains a polyester resin. The toner has a glass transition temperature (Tg1st) at first temperature rising of differential scanning calorimetry (DSC) of from 45° C. to 65° C. The toner includes a component insoluble in tetrahydrofuran (THF) having two glass transition temperatures (Tga1st and Tgb1st) at the first temperature rising of DSC, where Tga1st is in a range of −45° C. to 5° C. and Tgb1st is in a range of 45° C. to 70° C. The toner includes a component soluble in THF having a glass transition temperature (Tg2nd) at second temperature rising of DSC of from 40° C. to 65° C.