Image forming apparatus that provides different drive operation modes based on a sheet size

An image forming apparatus comprising:

• a photosensitive drum on which an electrostatic latent image is formed on a surface thereof in accordance with image information;
• a developing roller configured to supply toner to the photosensitive drum to develop the electrostatic latent image and form a toner image;
• transfer unit configured to transfer the toner image onto a recording material;
• a fixing unit configured to heat fix the toner image onto the recording material, the fixing unit including a pressure roller and a heating member that forms a fixing nip portion between the heating member and the pressure roller;
• a driving source configured to transmit driving force to the developing roller and the pressure roller;
• and
• a control unit configured to:
• determine whether the recording material is a normal-sized sheet where a width in an intersecting direction is at least a predetermined distance, or a small-sized sheet where the width is smaller than the predetermined distance;
• execute, in a case in which the recording material is the normal-sized sheet, a first mode, in which a post-rotation operation is performed in which the driving source is driven for a predetermined amount of time following the recording material passing the fixing nip portion;
• and
• execute, in a case in which the recording material is the small-sized sheet, a second mode, in which:
• the post-rotation operation is executed following the recording material passing the fixing nip portion;
• and
• after completing the post-rotation operation, the image forming apparatus enters an image forming job-stop state, in which an image forming operation is not executed,
• wherein, in the image forming job-stop state, a first stop of the driving source, a first drive of the driving source after the first stop, and a second stop of the driving source, after the first drive, are performed, and
• wherein, in the second mode, a post-rotation time period during which the driving source is driven in the post-rotation operation is longer than a first stop time period during which the driving source is stopped in the first stop, and the first stop time period is longer than a first drive time period during which the driving source is driven in the first drive.