US Patent 7310490 Developing unit for an image forming apparatus

Patent 7310490 was granted and assigned to Samsung on December, 2007 by the United States Patent and Trademark Office.

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Patent

Patent attributes

Current Assignee

Samsung

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

7310490

Date of Patent

December 18, 2007

Patent Application Number

11183774

Date Filed

July 19, 2005

Patent Primary Examiner

‌

Hoan Tran

Patent abstract

A developing unit for an image forming apparatus using a two-property developer that induces a magnetic attraction force based on the slope of a curved line representing the magnetism of each magnetic pole of a magnetic field generating part of a developing roller and determining a developer-regulating position where the changes of the magnetic attraction force are minor based on the magnetic attraction force in order to assure stable transfer of the developer to a photoconductive medium.

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