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. 28, 2004
Filed:
Sep. 26, 2002
Seung-young Byun, Seongnam-si, KR;
Jun-hee Cho, Yongin-si, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
A developer unit of an electrophotographic image forming apparatus includes a blocking blade having a magnetic fluid and a magnet. The magnetic fluid contacts a developer roller and the metering blade to prevent a developer from flowing to both ends of the metering blade. The magnetic fluid is fixed to the magnet which applies a pressure to the magnetic fluid so that the magnetic fluid contacts the developer roller and the metering blade. Since the magnetic fluid contacts the developer, wear of elements of the developer unit can be reduced, thereby securing durability of the developer unit. Also, a wrap-around phenomenon of the developer can be prevented.