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:
Nov. 03, 2026
Filed:
Mar. 15, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Tomoyuki Sakamaki, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developing device includes a developing roller to convey toner and a supplying roller to supply the toner. A region where an absolute value of a magnetic flux density in a normal direction of the supplying roller is 5 [mT] or less exists downstream of a position where a magnetic flux density of a third magnetic pole of the supplying roller is maximum, and exists upstream of a position where a magnetic flux density of a fourth magnetic pole of the supplying roller is maximum. A most upstream position of the region exists above a rotation center of the supplying roller, and an absolute value of a magnetic flux density in a tangential direction of the supplying roller in the most upstream position of the region is larger than an absolute value of a magnetic flux density of the supplying roller in the most upstream position of the region.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile