| 摘要 |
An image forming apparatus is free of spots on reverse side of a sheet due to the accumulation of toner fog in a non-image-forming area (between sheets, initial rotation, post-rotation) of a photosensitive drum. The image forming apparatus includes: an image bearer for bearing an image formed on a transferring material; a charging portion for charging the image bearer with predetermined potential; an exposing portion for forming an electronic latent image by exposing an image forming area of the image bearer charged with the predetermined potential; a developing portion for developing an electronic latent image on the image bearer to form on the image bearer an image to be formed on the transferring material, wherein a voltage set in the developing portion for the image forming area of the image bearer is different from a voltage set in the developing portion for a non-image-forming area of the image bearer; a transferring portion for transferring an image formed on the image bearer by the developing portion to the transferring material; a transferring current detecting portion for detecting a transferring current flowing through the transferring portion; and a controlling portion for controlling a voltage set in the developing portion, wherein a voltage set in the developing portion for the non-image-forming area of the image bearer is controlled based on a transferring current value detected by the transferring current detecting portion.
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