Patent ID: 7894766

Claim:
A bookbinding system that pastes a cover sheet onto a sheet bundle, the bookbinding system comprising: (a) an image forming section which forms a toner image based on image data; (b) a sheet storing section which stacks recording sheets on which toner images have been recorded by the image forming section, aligns the recording sheets thereby forming a sheet bundle; (c) a heating member which applies heat to an adhesive to melt; (d) a cover sheet pasting section which pastes a spine of the sheet bundle and a cover sheet with the adhesive melted by the heating member; and (e) a controller which controls the image forming section to shift and form the toner image based on the image data in a direction toward an edge portion opposite to the edge portion of the spine, when pasting the cover sheet onto the sheet bundle with the melted adhesive, whereby the controller controls the image forming section not to record the toner image based on the image data in the vicinity of the edge portion on a side of the spine of each of the recording sheets that constitute the sheet bundle, wherein the controller controls the image forming section to reduce and form the toner image according to a shifting amount of the toner image.