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:
Dec. 02, 2025
Filed:
Jan. 24, 2023
Tomoya Adachi, Kanagawa, JP;
Yuusuke Furuichi, Kanagawa, JP;
Yukimichi Someya, Saitama, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
A heating device includes a rotator, a pressure rotator, a heater, a holder, and lubricant. The heater inside the rotator forms a sliding nip between the rotator and the heater. The heater includes a resistive heat generator inside the sliding nip. The lubricant is applied to the inner surface of the rotator and a sliding surface of the heater. The lubricant is held in a lubricant holding region outside the sliding nip and between the rotator and the heater. An application quantity P of the lubricant satisfies the following.1×where A is a height of irregularities on the inner surface of the rotator, X1 is a longitudinal length of the rotator, B is a circumferential length of the rotator, C is a specific weight of the lubricant, and D is a volume of the lubricant holding region.