Patent ID: 7477859

Claim:
An image forming apparatus comprising: (a) an image forming section that forms an image on a sheet based on image data; (b) a sheet discharge tray on which the sheet with the image that has been formed is stacked; and (c) a controller that controls image formation, wherein the image forming apparatus has a one sided mode in which image formation is carried out only on one side of the sheet and a two sided mode in which image formation is carried out on both sides of the sheet, and wherein when the two sided mode is carried out the controller controls a composite image to be formed in which a cutting mark is attached to the image data for a first surface only or a second surface only of the sheet; and wherein when a total number of pages in the image data is N and image formation is carried out according to the image data starting from a first page successively up to an N th page, and when image formation is carried out first on the first surface and second on the second surface, the controller controls the cutting mark to be attached only to the image data for the second surface.