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. 15, 1992
Filed:
Jul. 02, 1991
Naotaka Funayama, Yamato-Koriyama, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A developing apparatus capable of preventing a leakage of developing powder from being placed on photoconductor of a copying machine, the developing apparatus having a doctor for restricting an amount of developing powder to be placed on said photoconductor of the copying machine includes a unit for storing a developing powder, a roller having a sleeve and a magnet and rotationally supported on the storing unit for laminating the developing powder output from the storing unit on the sleeve in accordance with a magnetic force of the magnet, and a unit for preventing the developing powder from being leaked to a non-imaging area located at end portions of the roller, the preventing unit being located in a upstream side of the storing unit and being so arranged that an interval between the preventing unit and the roller is larger than an interval between the doctor and the roller.