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. 08, 2001
Filed:
Oct. 19, 1999
Hiroaki Naito, Hyogo, JP;
Shinichi Yaoi, Kawasaki, JP;
Katsuya Shimatsu, Kawasaki, JP;
Jun Shimizu, Hyogo, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
The invention provides a developing apparatus which prevents transportation of aggregated toner powder to an image carrier and thereby assures a high print quality by taking a countermeasure to disperse aggregated toner powder when development of an image carrier with developer which includes toner powder and magnetic powder is performed. The developing apparatus includes a developing roller, a developer control member, and an aggregated toner dispersion member disposed in an opposing relationship to the transport magnetic pole of the fixed magnet on the upstream side with respect to the position of the developer control member and having a contact face in the form of a flat face with which the developer held on the outer circumferential face of the developing roller may be contacted under pressure in order to disperse aggregated toner powder in the developer held on the outer circumferential face of the developing roller. The aggregated toner dispersion member is disposed such that the contact face is spaced by a predetermined distance from the outer circumferential face of the developing roller and an angle defined between the tangential direction to the outer circumferential face of the developing roller at the position of the transport magnetic pole of the fixed magnet and the contact face is within a predetermined angle range.