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:
Oct. 25, 1994
Filed:
Aug. 25, 1993
Masaaki Yamaji, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A developing apparatus for developing an electrostatic latent image formed on an image bearing member includes a developer carrying member for carrying a developer containing toner particles and magnetic carrier particles. The developer carrying member moves through a developing zone for applying the developer to the electrostatic latent image. A stationary magnet assembly is disposed in the developer carrying member. The magnet assembly comprises a rare earth magnet having a first magnetic pole for forming a magnetic field in the developing zone and a resin magnet having a second magnetic pole disposed adjacent to the first magnetic pole downstream of the first magnetic pole with respect to a movement direction of the developer carrying member, wherein a maximum magnetic flux density on a developer carrying member provided by the first magnetic pole is larger than a maximum magnetic flux density on the developer carrying member by the resin magnet.