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:
May. 06, 2025
Filed:
Apr. 25, 2023
Canon Kabushiki Kaisha, Tokyo, JP;
Yuta Okuyama, Chiba, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A developing device includes a developer bearing member and carrier to develop an electrostatic latent image formed on an image bearing member, a developing container, a conveying screw which conveys the developer, and an inductance sensor which includes a detecting portion which detects magnetic permeability of the developer in the developing container. If the inductance sensor is not attached to the developing container and a predetermined magnetic material is disposed in contact with the detection portion, an output value when the detecting portion detects magnetic permeability of the predetermined magnetic material is A, and if the inductance sensor is not attached to the developing container and the predetermined magnetic material is disposed 1 mm away from the detection portion in a vertical direction passing through the detection portion, an output value when the detecting portion detects magnetic permeability of the predetermined magnetic material is B, with B/A≥0.1 being satisfied.