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:
Apr. 19, 2022
Filed:
Jul. 08, 2020
Ricoh Company, Ltd., Tokyo, JP;
Hiroshi Kikuchi, Kanagawa, JP;
Akira Fujimori, Kanagawa, JP;
Hideki Kimura, Kanagawa, JP;
Yutaka Takahashi, Kanagawa, JP;
Johji Yahagi, Kanagawa, JP;
Hiroyuki Uenishi, Kanagawa, JP;
Yusuke Ishizuka, Kanagawa, JP;
RICOH COMPANY, LTD., Tokyo, JP;
Abstract
A developing device includes a developer bearer, a developer regulator, a developer supply passage, and a stopper. The developer bearer includes a magnetic field generator and is configured to bear a developer containing toner and magnetic carriers and conveys the developer to a developing area by rotation. A stopper prevents the developer blocked by the developer regulator from moving to a surface of the developer bearer, while securing a supply path for passing the developer in the developer supply passage to the developer bearer between the stopper and an upper end of a side wall of the developer supply passage that is opposite to the developing bearer. A width of the supply path in a direction perpendicular to a direction of a rotation axis of the developer bearer is in a range of 7%-10% of a circumference of an outer diameter of the developing bearer.