Image forming system

An image forming system comprising:

• an image forming unit capable of executing an operation in an image forming mode for forming a toner image on a recording medium;
• a pressure-bonding processing unit including a folding processing portion, a film supplying portion and a pressure-bonding portion, and capable of executing an operation in a pressure-bonding processing mode in which the recording medium is folded at a predetermined folding position so that one surface of the recording medium is folded to provide opposing inner surfaces by said folding processing portion and a thermosensitive adhesive film is supplied to the inner surfaces of the folded recording medium by said film supplying portion and then in which the folded recording medium is pressure-bonded under application of heat and pressure by said pressure-bonding portion;
• a display portion configured to display information;
• and
• a control unit configured to control said image forming unit by acquiring image data for forming the toner image on the recording medium in the operation in the image forming mode, and configured to control said display portion to issue a warning in a case that the toner image to be formed on the inner surface protrudes outside a film region, the film region being a region of the inner surface to which the thermosensitive adhesive film is to be supplied,
• wherein said pressure bonding processing unit supplies the adhesive film to the folded recording medium so that a region in which the adhesive film is not superposed on the inner surfaces is formed on sides upstream and downstream of the fold with respect to a feeding direction of the recording medium, and
• wherein the region the adhesive film is not superposed on the inner surfaces is stored as the film region information in a storing portion configured to store a film region information representing the film region for each of sizes of recording mediums.