JPS6142564U

JPS6142564U - magnetic brush developing device

Info

Publication number: JPS6142564U
Application number: JP12868584U
Authority: JP
Inventors: 勇小松; 孝一松田; 和夫宇野; 善隆藤沼
Original assignee: 日立工機株式会社
Priority date: 1984-08-24
Filing date: 1984-08-24
Publication date: 1986-03-19

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

置の一実施例を示す縦断面図、第２図ば、本考案現像装
置の縦断面図である。図において、２は現像剤、６は現像磁気ロール、８はス
クレーパ、９は感光体、１０ほ固定磁石、１１は非磁性
体スリーブ、１２は清掃用磁気ロール、１３は整形部材
である。FIG. 2 is a vertical cross-sectional view of an embodiment of the developing device according to the present invention. In the figure, 2 is a developer, 6 is a developing magnetic roll, 8 is a scraper, 9 is a photoreceptor, 10 is a fixed magnet, 11 is a non-magnetic sleeve, 12 is a cleaning magnetic roll, and 13 is a shaping member.

Claims

[Claim for Utility Model Registration] 1. In an electrophotographic magnetic brush developing device, a fixed magnet and its outer periphery are arranged such that adjacent magnetic poles are of different polarity, and magnetic poles of the same polarity are adjacent to each other at one location. A cleaning magnetic roll made of a non-magnetic sleeve that rotates in the opposite direction to the rotational direction of the photoconductor is conveyed by the developing magnetic roll, and the developer after it comes into contact with the photoconductor is used for cleaning. It is installed at a position where the magnetic force of the magnetic d-ru can attract and transport the developer and the surface of the photoreceptor can be rubbed by the magnetic brush, and the fixed magnet is usually set to have a magnetic pole arrangement that does not attract and transport the developer. Then, at an arbitrary period, during non-development when no electrostatic latent image is formed on the photoreceptor, the fixed magnet is rotated for a certain period of time to set a magnetic pole arrangement that can attract and transport the developer, A magnetic brush developing device characterized in that the developer is adsorbed and conveyed by the cleaning magnetic roll, and the surface of the photoreceptor is rubbed and cleaned by a magnetic brush whose spikes are uniformly arranged by a shaping member. 2. A request for registration of a utility model characterized in that the relationship between the gap d between the non-magnetic sleeve of the cleaning magnetic roll and the shaping member and the gap 1 between the non-magnetic sleeve and the photoreceptor is d≧1. The magnetic brush developing device according to item 1.