Patent ID: 7715735

Claim:
An image forming system that having a plurality of sheet processing apparatuses arranged serially for processing recording media and conveying the recording media from the sheet processing apparatus positioned upstream of the recording media conveying direction to the sheet processing apparatus positioned downstream thereof, each of the sheet processing apparatuses comprising: a detection unit adapted to detect an abnormal condition occurring in the respective sheet processing apparatus; a reception unit adapted to receive, in a case where an abnormal state is detected by a detecting unit of any one of the plurality of sheet processing apparatuses, acceptance advisability information sent from the sheet processing apparatus positioned immediately downstream of the respective sheet processing apparatus for determining whether the recording media are acceptable or not by the immediately downstream sheet processing apparatus; a determination unit adapted to determine whether the recording media to be conveyed from the sheet processing apparatus positioned immediately upstream of the respective sheet processing apparatus are acceptable or not based on a configuration of an escape conveying path, which is available in the respective sheet processing apparatus, and the acceptance advisability information received by the reception unit of the respective sheet processing apparatus; and a notification unit adapted to send determination result by the determination unit to the sheet processing apparatus positioned immediately upstream of the respective sheet processing apparatus as acceptance advisability information for the respective sheet processing apparatus.