Patent ID: 8532518

Claim:
An image forming apparatus comprising: an image bearing member; image forming means for forming a toner image on said image bearing member, said image forming means being capable of forming an image to be formed on a recording material and forming a control image for controlling an image density at a position adjacent to the image to be formed on the recording material; an intermediary transfer member rotatable while carrying the toner image transferred from said image bearing member; a transfer member for forming a transfer portion where the toner image is to be transferred from said intermediary transfer member onto the recording material; electrostatic cleaning means for electrostatically removing the toner deposited on said transfer member; density detecting means, provided upstream of said transfer member with respect to a rotational direction of said intermediary transfer member, for detecting a density of the control image transferred on said intermediary transfer member; adjusting means for adjusting an image forming condition of said image forming means depending on an output of said density detecting means; and charge amount changing means for adjusting a charge amount of the control image transferred onto said intermediary transfer member.