Patent ID: 7744075

Claim:
A bookbinding system to produce booklets, comprising: an image forming section which forms an image on a sheet; a first conveyance route serving as a conveyance route of the sheet on which the image has been formed by the image forming section; a sheet storing section which stores sheets on which no image is to be formed by the image forming section; a second conveyance route serving as a sheet conveyance route to connect the sheet storing section and the first conveyance route; a notch forming section which forms notches on edges of conveyed sheets; and a bookbinding section which accumulates the conveyed sheets to form a sheet bundle, and adheres a cover sheet to the sheet bundle to form a booklet, wherein the image forming section is positioned upstream of a merging point of the first conveyance route and the second conveyance route, with respect to a sheet conveyance direction of the first conveyance route, wherein the notch forming section is positioned downstream of the merging point, with respect to the sheet conveyance direction; wherein a position of the conveyed sheet is changed under the notch forming section such that one of (i) a punching process to form round holes is selected and (ii) a notching process to form half round notches is selected, and wherein the bookbinding section is positioned downstream of the notch forming section, with respect to the sheet conveyance direction.