Patent ID: 8086165

Claim:
A bookbinding system including an image forming apparatus and a bookbinding apparatus connected to the image forming apparatus, the bookbinding system comprising: an image forming unit configured to form an image on a recording sheet; a loading unit configured to load, as a bookblock stack, a plurality of recording sheets on which images are formed by the image forming unit; a bonding unit configured to form a booklet by bonding a cover with the bookblock stack; a setting unit configured to set a bookblock size, a cover size, and a finishing size; a cutting unit configured to cut the booklet bonded together with the cover by the bonding unit into a booklet having the finishing size set by the setting unit; a stack thickness detection unit configured to detect a thickness of the bookblock stack; and a bookbinding permission/inhibition determination unit configured to determine permission/inhibition of a bookbinding operation based on a stack thickness detection result obtained by the stack thickness detection unit as well as the bookblock size, the cover size, and the finishing size set by the setting unit; and a cover cutting amount calculation unit configured to calculate a cover cutting amount in a front edge direction based on the stack thickness detection result obtained by the stack thickness detection unit as well as the bookblock size, the cover size, and the finishing size set by the setting unit, wherein the bookbinding permission/inhibition determination unit determines permission/inhibition of a bookbinding operation based on a calculation result obtained by the cover cutting amount calculation unit, wherein the bookbinding permission/inhibition determination unit determines to postpone feeding of a cover if the cutting amount calculated by the cover cutting amount calculation unit is not within a predetermined range.