Patent ID: 7770877

Claim:
An image processing apparatus comprising: an image forming engine; a standard sheet tray that accommodates a sheet having a standard size, and supplies the sheet to the image forming engine, the standard sheet tray being provided to be extendable in an upstream direction with respect to a sheet conveying direction to accommodate a long sheet and supply the long sheet to the image forming engine; and a discharge tray that receives the sheet on which an image is formed by the image forming engine and discharged from the image processing apparatus, the discharge tray is connected to a feeder that is configured to supply the sheet to the image forming engine; a discharge guide unit that is detachably provided on the image processing apparatus and guides the long sheet discharged from the image processing apparatus towards the discharge tray by changing a conveying direction of the long sheet; and an extension detection unit that detects whether or not the standard sheet tray is extended, wherein the standard sheet tray does not support one end of the long sheet in a state where the standard sheet tray is extended, and wherein the long sheet has a length longer than that of a sheet accommodatable by the standard sheet tray in a state where the standard sheet tray is retracted, wherein a processing control unit detects whether or not the discharge guide unit is attached to the image processing apparatus.