| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrostatic charging device which can prevent the generation of an abnormal image diffusing a dense electric discharge produce generated during electric discharge simultaneously with its generation to sup press the deposition of the electric discharge product on a photoreceptor. SOLUTION: Aspirating holes 23 are bored on the whole surface of an electrostatic charging roller 20 which is a hollow roller. A ventilation pipe 25 is connected to one end 24 of the electrostatic charging roller 20, an exhaust fan 26 is arranged at the tip part to enable exhaust of air inside the electrostatic charging roller 20. The air is sucked in the roller 20 from the hole 23, and NOx which is the electric discharge product in the vicinity of the electrostatic charging roller 20 is sucked by its suction force.
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