| 摘要 |
PURPOSE:To prevent the distribution of a discharge current which flows in the lengthwise direction of a corona discharge electrode from becoming uneven with small power consumption by providing a device which applies lengthwise expansion strain to the corona dischrge electrode. CONSTITUTION:The operationof an oscillator 16 is controled by a control mechanism 17, and when a signal R1 is inputted with a copy button 18 turned on, the oscillator 16 is driven until the completion of copying operation to vibrate a vibrator 14 for the copying operation. Consequently, a metallic thin wire 15 for discharge is extended and contracted lengthwise during the copying operation, and lengthwise strain is generated among metallic crystal lattices repeatedly at a short period. Consequently, electrons are emitted from the surface of the metallic thin wire 15 for discharge through an exo-electron emission phenomenon, so secondary electron operation necessary for corona discharge is supplemented to increase corona discharge current density. Consequently, the density distribution f ions generated near the metallic thin wire 15 is made uniform lengthwise. |
