Bookbinding apparatus with sheet inserter

A bookbinding apparatus comprising:

• a storing unit that stores a paper bundle that is formed of printed body text paper sheets conveyed from a printer and a medium that is inserted into the body text paper sheets and that is different from the body text paper sheets;
• a storage unit that stores the medium that is manually fed;
• a conveyance unit that conveys the medium from the storage unit to the storing unit;
• a trial paper feeding control unit that performs a trial conveyance in which the medium is conveyed from the storage unit to a prescribed position;
• a determination unit that determines, according to a result of the trial conveyance, whether the medium can be conveyed from the storage unit before the body text paper sheets that include a specified page are stored in the storing unit, the specified page being a page specified by a print job;
• and
• a control unit that controls the conveyance unit so as to insert the medium into the body text paper sheets based on the specified page,
• wherein when the determination unit determines that the medium can be conveyed, the control unit controls the conveyance unit so as to convey the medium from the storage unit to the storing unit after the body text paper sheets that include the specified page are stored in the storing unit and before the body text paper sheet conveyed from the printer immediately afterwards is stored in the storing unit,
• wherein the storage unit includes a conveying roller that conveys the medium, and a driving unit that drives the conveying roller, and
• wherein in performing the trial conveyance, the trial paper feeding control unit controls the driving unit so as to revolve the conveying roller during a prescribed time period at a lower speed than a speed when the medium is conveyed in order to convey the medium to the storing unit.