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:
Dec. 10, 1991
Filed:
May. 29, 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 developer chamber containing a developer comprising non-magnetic toner particles and magnetic carrier particles; a rotatable cylindrical developer carrying member, faced to the image bearing member, for carrying the developer supplied thereto in the developer chamber to supply it to the image bearing member; a magnet stationarily disposed in the developer carrying member to form a magnetic brush of the developer contactable to the image bearing member, wherein a position of maximum magnetic flux density in a direction normal to a surface of the developer carrying member provided by a developing magnetic pole of the magnet is not less than 3 degrees away from a position where the developer carrying member is closest to the image bearing member, and wherein a position of a peak of magnetic force in a direction normal to the surface of the developer carrying member provided by the developing magnetic pole is within 8 degrees from the closest position.