| 摘要 |
An image forming apparatus includes first and second image bearing members, a belt member contacting the first and second image bearing members, first and second electrostatic image forming portions for respectively forming electrostatic images on the first and second image bearing members, first and second developing portions for forming toner images on the basis of the electrostatic images formed on the first and second image bearing members, first and second transfer portions for transferring onto the belt member the toner images formed on the first and second image bearing members and/or electrostatic image indices formed by the electrostatic image forming portions, first and second detecting portions for detecting the electrostatic image indices which are formed by the electrostatic image forming portions, and an adjusting portion for adjusting a forming operation of an image to be formed on the belt member on the basis of outputs of the first and second detecting portions, and a belt member charging portion for electrically charging the belt member before transfer of the electrostatic image indices. |
