| 摘要 |
PURPOSE:To eliminate uneven electrification and to enable always uniform electrification at a high speed by electrifying a photoreceptor secondarily with an AC type corona charger in succession to primary electrification. CONSTITUTION:A photoreceptor 8 is electrified primarily by the electric discharging effect from a corona electrode 3 connected to a DC high voltage source 4, and is, in succession, electrified secondarily by an AC type corona charger 2. The photoreceptor is elecrified in this stage while a self-biasing function for a grid electrode 11 is provided to the corona discharge of a DC corona charger 1. The electrode 11 is provided across the discharge opening 9 of the charger 1 as well, and the DC corona current by the large corona discharge by the charger 1 flows through the electrode 11. As a result, the electrifying performace of the charger 2 is improved considerably, and the uniform electrification is made possible. |
