Image forming apparatus

摘要

The image forming apparatus in this invention uses a positive corona discharger as a main charger. A photosensitive material having a charge accepting ability per run-off current of at least 40 V/ mu A from a corona discharger (measured by using a discharge length of 230 mm and by taking the peripheral speed of the photosensitive material as 48 mm/sec) is used, and a DC voltage is impressed on the positive corona discharger so that the average ozone concentration of an atmosphere of the photosensitive material 2 ppm or less and the ozone concentration immediately below the corona discharger becomes 5 ppm or less to perform main charging. According to this apparatus, the amount generated of ozone can be decreased, and charging unevenness can be prevented to form a good image.