Image forming device having photosensitive drum and developing roller

摘要

An image forming device (1) for forming images on a sheet (P) transported along a sheet-transport pathway (PP) from a sheet supply tray (11) to a sheet discharge unit (77) includes a photosensitive drum (20) 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 (56) disposed in confrontation with the photosensitive drum and for developing an 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.