| 摘要 |
PURPOSE:To simplify the constitution, by eliminating long cords and troubles of wiring which are required in the constitution where a feed cord is stretched to each part requiring bias application. CONSTITUTION:A developing device box consists of an insulator or a metal which is so constitutued that a bias is not applied, and a developer layer thickness controlling member 12 (a blade for a coat sleeve 2) which forms developer layer having a prescribed thickness on the surface of a sleeve holding a developed image is engaged with a metallic stay 8, and still shafts 202 and 203 in sleeves 1 and 2 are engaged with the stay 8 or member 9 which is connected to the stay 8 electrically, and a development bias is applied to the stay 8 or the member which is connected to this stay electrically. Since the bias is not applied to side plates 5 and 6 and a lower stay 7 of the developing device box, troubles such as the triboelectricity generation of the toner and the degeneration of the toner are prevented. |
