Patent ID: 8005417

Claim:
A bookbinding system comprising: an image forming apparatus for forming images in response to a job instruction; and a bookbinding apparatus adapted to make a booklet by bonding a stack of sheets with a front cover sheet; wherein both the image forming apparatus and the bookbinding apparatus include a communication section respectively, for transmitting information from the image forming apparatus to the bookbinding apparatus; the bookbinding apparatus comprises a coating section for coating adhesive on the stack of sheets, a replenishing section for replenishing adhesive to the coating section, and a controller for controlling the replenishing section; wherein the coating section is provided with an adhesive tank and a sensor to detect an amount of adhesive in the adhesive tank; wherein when the sensor detects a reduction of the adhesive in the adhesive tank after a coating process by the coating section, the bookbinding apparatus controls the replenishing section to replenish adhesive to the adhesive tank once in a current job according to the job instruction; and wherein the controller controls the replenishment rate of the adhesive by the replenishing section, based on information which represents at least a number of sheets constituting a booklet, a thickness of the sheets, a type of the sheets, and a size of the sheets and is transmitted from the image forming apparatus through the communication section.