Patent ID: 6311027
Filing Date: 2001-10-30
Classification: G03G

Abstract:
An image-forming apparatus comprising:a rotatable photoreceptor;charging means for charging the surface of the photoreceptor to a regular electric potential by means of corona discharging, the charging means being provided with a control electrode for controlling a quality of corona ions that are allowed to reach the photoreceptor from a discharging electrode;latent image forming means for forming an electrostatic latent image on the photoreceptor that has been charged by the charging means by means of light irradiation;developing means for developing the electrostatic latent image by using a developer; andcontrol voltage supply means for supplying a control voltage to the control electrode,wherein the control voltage supply means switches the control voltage at least once from a low-voltage side to a high-voltage side, during a time period from a time when the control voltage is supplied to the control electrode to a time when the surface electric potential of the photoreceptor has risen to the regular electric potential.