Patent ID: 8170464

Claim:
An image forming apparatus for forming an image on sheet media, comprising: a memory section which memorizes a position of holes previously punched on the sheet media; an operation section which is operable to select the sheet media to be used for image formation, a double-surface print operation, and a binding direction, the binding direction being selectable via the operation section independently of the position of the holes previously punched on the sheet media; and a control section which determines whether the position of the holes previously punched on the selected sheet media is coordinated with the binding direction selected via the operation section independently of the position of the holes previously punched on the sheet media, after the sheet media previously punched and the double-surface print operation have been selected via the operation section, and wherein the control section interrupts starting operation of the image formation, and warns an operator that the position of the holes previously punched on the selected sheet media is not coordinated with the selected binding direction, if it is determined that the position of the holes previously punched on the selected sheet media is not coordinated with the selected binding direction.