Patent ID: 7826788

Claim:
An image forming system comprising: a plurality of recording medium storing devices which are adapted to store recording media; an image reading device which is adapted to read image information of a document placed on a platen glass; a document size obtaining device which is adapted to obtain a size of the document; an auto paper select button which is adapted to designate an auto paper select mode that selects a recording medium from among the recording media stored in the plurality of the recording medium storing devices based on the size of the document obtained by the document size obtaining device; an image forming device which is adapted to form an image on the recording medium based on the image information read by the image reading device; a tri-folding device which is adapted to fold the recording medium on which the image is formed in three; a folding setting input device which inputs a tri-folding setting; and a control device which controls the image forming system such that: (i) when the auto paper select mode is designated by pushing the auto paper select button, when the tri-folding setting is not input by the folding setting input device, and when a longitudinal document whose short side direction is parallel to a document conveyance direction is placed on the platen glass, if a longitudinal recording medium having a short side direction that is parallel to a recording medium conveyance direction is present in one of the recording medium storing devices and a size of the longitudinal recording medium is the same as a size of the longitudinal document on the platen glass, the image forming device feeds the longitudinal recording medium from the one of the recording medium storing devices and forms the image thereon based on the image information read by the image reading device; and (ii) when the auto paper select mode is designated by pushing the auto paper select button, when the tri-folding setting is input by the folding setting input device, and when the longitudinal document is placed on the platen glass, the image forming device feeds a lateral recording medium having a long side direction that is parallel to the recording medium conveyance direction from one of the recording medium storing devices and forms the image based on image information, which is obtained by rotating the image information read by the image reading device by 90 degrees, on the lateral recording medium, and the image forming device does not feed the longitudinal recording medium having the short side direction that is parallel to the recording medium conveyance direction, and then the lateral recording medium on which the image is formed is folded in three by the tri-folding device.