Patent ID: 7722023

Claim:
A bookbinding apparatus which coats adhesive on a spine of a sheet bundle by moving relatively the sheet bundle or a coating device which coats adhesive to the spine for a plurality of sheet bundles including a foregoing sheet bundle and a following sheet bundle, one by one, the bookbinding apparatus comprising: a thickness information generating device which generates information on a thickness of each of the sheet bundles, a booklet information generating device which generates booklet information including at least information on the number of sheets constituting each of the sheet bundles, and a control device which determines a coating mode of an adhesive layer to be coated on the spine of the foregoing sheet bundle based on the thickness information of the foregoing sheet bundle, and sets the coating mode as an initial coating mode and sets the booklet information of the foregoing sheet bundle as an initial booklet information, wherein, by comparing the booklet information of the following sheet bundle with the initial booklet information, the control device judges whether the coating mode of an adhesive layer to be coated on the spine of the following sheet bundle is the same as the initial coating mode or a coating mode of the adhesive layer for the following sheet bundle is newly determined based on the thickness information of the following sheet bundle.