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:
Feb. 10, 2026
Filed:
Aug. 28, 2024
Canon Kabushiki Kaisha, Tokyo, JP;
Tomoyuki Sakamaki, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A first maximum position where a magnetic flux density of a first magnetic pole is maximum is positioned downstream of a first developing position and upstream of a first closest position. A second maximum position where a magnetic flux density of a third magnetic pole is maximum is positioned downstream of a second closest position and upstream of a second developing position. A relationship of r1×θ1>r2×θ2 is satisfied, in a case where r1 represents a radius of a first rotatable developing member, r2 represents a radius of a second rotatable developing member, θ1 represents an angle from the first maximum position to the first closest position in the rotational direction of the first rotatable developing member, and θ2 represents an angle from the second closest position to the second maximum position in the rotational direction of the second rotatable developing member.