Patent ID: 8235375

Claim:
An image forming system comprising: an image forming unit that forms images on a plurality of recording materials; a stacking unit that is used for stacking the plurality of recording materials having the images formed thereon by the image forming unit as a bundle of the plurality of recording materials, the bundle having the plurality of recording materials placed upon each other, with first edge portions and second edge portions, differing from the first edge portions, of the respective recording materials being aligned with each other; a first binding unit that binds, by a first binding operation, the first edge portions of the bundle of the plurality of recording materials stacked upon the stacking unit; a needleless second binding unit that binds, by a second binding operation, the second edge portions of the bundle of the plurality of recording materials stacked upon the stacking unit; a reversing transporting unit that reverses front and back surfaces of the recording materials having the images formed thereon by the image forming unit, and that transports the reversed recording materials to the stacking unit; and a controller that performs control to determine whether or not to cause the reversing transporting unit to reverse and transport the recording materials, on the basis of orientations of the images with respect to the recording materials and on the basis of positions of the first binding operation and the second binding operation.