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:
Sep. 24, 1991
Filed:
May. 31, 1990
Masaaki Yamaji, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A developing apparatus for developing an electrostatic latent image formed on an image bearing member includes a rotatable developer carrying member for being supplied with developer in a developer container and for carrying the developer through a developing zone. A magnet is stationarily disposed in the developer carrying member. The magnet has a first magnetic pole for forming a magnetic field in the developing zone, a second magnetic pole disposed downstream thereof with respect to a rotational direction of the developer carrying member and having a magnetic polarity opposite thereto, and a third magnetic pole disposed downstream of the second magnetic pole with respect to the direction and disposed adjacent to the second magnetic pole. The second magnetic pole has a magnetic flux density satisfying