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:
Sep. 16, 2025
Filed:
Nov. 02, 2021
Ryuuta Yoshida, Shizuoka, JP;
Toma Takebayashi, Shizuoka, JP;
Akio Takei, Shizuoka, JP;
Yasuo Kamada, Shizuoka, JP;
Ryuuta Yoshida, Shizuoka, JP;
Toma Takebayashi, Shizuoka, JP;
Akio Takei, Shizuoka, JP;
Yasuo Kamada, Shizuoka, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
The present disclosure provides a toner having excellent low-temperature fixing, heat-resistant-storage property, cleaning performance, and filming resistance. A toner containing toner base particles having a crystalline polyester resin and an amorphous polyester resin includes a plurality of organic particles disposed at least partially embedded in a surface of the toner base particles. A percentage of the crystalline polyester resin occupying the surface of the toner base particles is 4% to 20%, a volume average particle size of the organic particles is 10 nm to 40 nm, and a standard deviation of a distance between adjacent particles of the organic particles that are not in contact is 500 nm or less.