Image forming apparatus

An image forming apparatus comprising:

• an image bearing member configured to carry a toner image;
• a rotatable transfer member constituting a transfer portion configured to transfer the toner image from said image bearing member onto a recording material;
• a voltage source configured to apply a voltage of a predetermined polarity to said transfer member to transfer the toner image from said image bearing member onto the recording material;
• an executing portion configured to execute an image forming mode for continuously forming images on a plurality of recording materials having different widths measured in a direction of a rotational axis of said transfer member;
• an interval adjustment portion configured to adjust, when the images are formed continuously on the recording materials having a width smaller than a predetermined value during the execution of the image forming mode, an interval between adjacent recording materials to a first interval, and then to adjust the interval from the first interval to a second interval,
• wherein the second interval is larger than the first interval and is larger than an interval between adjacent recording materials during the execution of the operation in the image forming mode when the recording materials have a width larger than the predetermined value;
• and
• a voltage controller configured to control said voltage source to apply, during the second interval, a voltage of the predetermined polarity to said transfer member.