Patent ID: 7941083

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 the first toner image transferred from the first image bearing member, and which bears the 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 portion 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 portion 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 onto the belt member; an adjusting portion which adjusts an image forming condition of at least one of the first image forming portion and the second image forming portion due to a 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, wherein, in a first image forming job, images are continuously formed onto the recording material having a first width in the direction perpendicular to the transport direction of the recording material, wherein, in a second image forming job, images are continuously formed onto the recording material having a second width which is longer than the first width in the direction perpendicular to the transport direction of the recording material, and wherein the adjusting portion adjusts more frequently during the first image forming job than during the second image forming job.