Image forming device having a photosensitive drum and developing roller that rotate in the same direction

摘要

An image forming device for forming images on a sheet transported along a sheet-transport pathway from a sheet supply tray to a sheet discharge unit includes a photo-sensitive drum rotated in a predetermined rotational direction at a predetermined peripheral speed, the photosensitive drum having a peripheral surface capable of forming a latent static electric image; and a developing roller disposed in confrontation with the photosensitive drum and for developing a latent static electric image formed on the peripheral surface of the photosensitive drum into a toner image, the developing roller being rotated in the rotational direction at a peripheral speed not more than two times the predetermined peripheral speed.