Patent ID: 7702268

Claim:
An image forming apparatus comprising: a first image forming portion which includes a first image bearing member, and which forms a first toner image on the first image bearing member; a second image forming portion which includes a second image bearing member, and which forms a second toner image on the second image bearing member; a belt member which bears a first toner image transferred from the first image bearing member, and which bears a second toner image transferred from the second image bearing member so as to superpose the second toner image on the first toner image transferred from the first image bearing member; a transfer part which transfers the first and second toner images onto a recording material; a fixing apparatus which fixes the first and second toner images on the recording material using heat; a detection part which detects a first alignment toner image transferred from the first image bearing member onto the belt member, and which detects a second alignment toner image transferred from the second image bearing member to the belt member; an adjusting part which adjusts an image forming condition of one of the first image forming portion and the second image forming portion due to the detection of the first and second alignment toner images by the detection part; and a recording material detection portion which detects a size of the recording material at least in a direction perpendicular to a transport direction of the recording material; and a control portion which, in a continuous image forming job for continuously forming images on the recording material, increases a frequency of execution of the adjusting portion when the size of the recording material in the direction perpendicular to the transport direction of the recording material becomes smaller.