Patent ID: 7536149

Claim:
An image forming apparatus comprising: an image forming section to form an image on a recording medium; a sheet tray on which an inserting sheet is stacked; a sheet overlapping section to make the recording medium and the inserting sheet overlap with each other; a first conveyance section to convey the recording medium from the image forming section to the sheet overlapping section; a second conveyance section to convey the inserting sheet from the sheet tray to the sheet overlapping section; a third conveyance section to simultaneously convey the recording medium and the inserting sheet from the sheet overlapping section to a postprocessing section, wherein the post-processing section processes the recording medium and the inserting sheet conveyed by the third conveyance section; a storage section to store first printing information of the recording medium and second printing information of the inserting sheet; a setting section to set analogous conditions with respect to the recording medium and the inserting sheet; and a determining section to compare the first printing information of the recording medium with the second printing information of the inserting sheet, so as to determine whether or not the first printing information and the second printing information are analogous to each other, based on the analogous conditions; wherein the sheet overlapping section makes the recording medium and the inserting sheet overlap with each other, when the determining section determines that the first printing information and the second printing information are analogous to each other.