JPH03122452U

JPH03122452U -

Info

Publication number: JPH03122452U
Application number: JP3051090U
Authority: JP
Priority date: 1990-03-27
Filing date: 1990-03-27
Publication date: 1991-12-13

Description

[Brief explanation of drawings]

第１図は現像装置の一例を示す概略断面図、第
２図は現像ローラの導電性部片と誘電体、並びに
該ローラに付着するトナーを模式的に拡大して示
した説明図、第３図は同じく導電性部片表面の導
電部を模式的に拡大して示した現像ローラ表面の
平面図、第４図は現像ローラ表面の近傍に形成さ
れる微小電界の電気力線を示した説明図、第５図
は導電性ローラの斜視図、第６図ａ，ｂ，ｃは現
像ローラの各製造工程を示す拡大模式断面図であ
る。２……現像装置、４……磁性トナー、９……現
像装置、１１……誘電体、１１ａ……誘電性物質
、１２……導電部、１１２……導電性部片、１１
２ａ……基端部。 FIG. 1 is a schematic cross-sectional view showing an example of a developing device, FIG. 2 is an explanatory diagram schematically showing a conductive part and a dielectric material of a developing roller, and toner attached to the roller, and FIG. The figure is a plan view of the developing roller surface schematically showing the conductive part on the surface of the conductive piece, and FIG. 4 is an explanation showing the lines of electric force of the minute electric field formed near the developing roller surface. Figures 5 and 5 are perspective views of the conductive roller, and Figures 6a, b, and c are enlarged schematic sectional views showing each manufacturing process of the developing roller. 2...Developing device, 4...Magnetic toner, 9...Developing device, 11...Dielectric, 11a...Dielectric substance, 12...Conductive part, 112...Conductive piece, 11
2a... Proximal end.

Claims

[Claims for Utility Model Registration] Non-magnetic toner is supplied to a rotationally driven toner carrier, the toner is carried on the surface of the carrier and is conveyed, and the latent image carrier and the toner carrier face each other. In the developing device, the electrostatic latent image formed on the latent image carrier is visualized by the toner carried on the toner carrier in the developing region, wherein the toner carrier is a conductive substrate. The proximal ends of a large number of conductive pieces are embedded and fixed on the surface in a conductive state with respect to the base body and spaced apart from each other, and after coating a dielectric material thereon, polishing the surface, Using a toner carrier in which the tip conductive portion of the conductive piece and the dielectric body made of the dielectric material are exposed on the surface, the dielectric body is charged to a predetermined polarity, so that the area near the surface of the toner carrier body is charged. 1. A developing device comprising: a charging means for forming a minute closed electric field on a surface of a toner carrier and causing the toner used for visualizing an electrostatic latent image to adhere to the surface of a toner carrier by the closed electric field.