| 摘要 |
PURPOSE:To obtain a visible image which have less uneven density, high sharpness and resolution and less photographic fog, by providing a means for generating an electric field which generates electric field between a regulating member for layer thickness and a carrying body for a toner by applying the voltage of the polarity reversed from the charging polarity of the toner on the member for regulating the layer thickness. CONSTITUTION:The toner on a sleeve 5 which passed through a clearance (d) and receive substantially no effect of a electric field form a thin layer 3a smaller than the spacing (d) between a regulating member and a sleeve, and since the thickness of the layer 3a is decreased by the effect of the electric field generated in the clearance (d), the thickness thereof is made uniform overall as compared to the case in which conventional regulating members which regulate the layer thickness by the mechanical scraping force alone are used. Since a regulating member 6 for layer thickness is applied with an insulation treatment, the member 6 applied with the voltage prevents the impression of the electric charge of the polarity reverse from the polarity of the charge to be applied on the toners into the toners. It is possible to regulate the thickness of the toner layer 3a on the sleeve 5 by regulating the voltage of an electric power source 8. |
