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:
Mar. 12, 1996
Filed:
Dec. 21, 1992
Fujitsu Limited, Kawasaki, JP;
Abstract
A developing device using a two-component developer including a vessel for holding the two-component developer, a magnetic roller provided within the vessel and rotatably supported by side walls of the vessel to entrain and bring the developer to a developing zone for a development of an electrostatic latent image, and a doctor blade provided within the vessel to uniformly regulate an amount of the developer entrained by the roller. The ends of the doctor blade are movably inserted into openings formed in the side walls of the vessel, respectively, and the blade is provided with a spring associated therewith such that each of the ends of the blade is resiliently abutted against an end edge which partially defines the opening formed in the corresponding side wall of the vessel, whereby the blade is positioned with respect to the roller to a given clearance therebetween for a uniform regulation of the amount of the developer entrained by the roller. The developing device also includes at least two screw members arranged parallel with each other to define passages for circulating the two-component developer and a partition member, having two end portions, provided between the two screw members, the partition member having a length shorter than that of the screw members, so that developer circulating passages are in communication with each other at the two end portions of the partition member. The developing device have an outlet port formed in the bottom of the device.