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:
Jan. 31, 2017
Filed:
Aug. 29, 2014
Shinsuke Nagai, Shizuoka, JP;
Shinya Nakayama, Shizuoka, JP;
Tsuyoshi Sugimoto, Shizuoka, JP;
Susumu Chiba, Shizuoka, JP;
Kohsuke Nagata, Shizuoka, JP;
Daisuke Asahina, Shizuoka, JP;
Shinsuke Nagai, Shizuoka, JP;
Shinya Nakayama, Shizuoka, JP;
Tsuyoshi Sugimoto, Shizuoka, JP;
Susumu Chiba, Shizuoka, JP;
Kohsuke Nagata, Shizuoka, JP;
Daisuke Asahina, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A toner, wherein the toner has glass transition temperature [Tg1st (toner)] of 20° C. to 50° C., where the glass transition temperature [Tg1st (toner)] is measured in a first heating in differential scanning calorimetry (DSC) of the toner, wherein tetrahydrofuran (THF) insoluble matter of the toner has glass transition temperature [Tg2nd (THF insoluble matter)] of −40° C. to 30° C., where the glass transition temperature [Tg2nd (THF insoluble matter)] is measured in a second heating in differential scanning calorimetry (DSC) of the tetrahydrofuran (THF) insoluble matter, wherein the THF insoluble matter has a storage modulus at 100° C. [G'(100) (THF insoluble matter)] of 1.0×10Pa to 1.0×10Pa, and wherein a ratio of a storage modulus of the THF insoluble matter at 40° C. [G′(40) (THF insoluble matter)] to the storage modulus of the THF insoluble matter at 100° C. [G′(100) (THF insoluble matter)] is 3.5×10 or less.