Imaging forming system comprised of image forming apparatuses arranged in series, and which prevents an excessive rise in either of an inside temperature or a fixing section temperature of a downstream image forming apparatus

An image forming system comprising:

• a first image forming apparatus capable of forming an image on a first side of a sheet and discharging the sheet having the image on the first side thereof, for double-sided printing by a tandem-outputting;
• and
• a second image forming apparatus disposed in series at a downstream side of the first image forming apparatus in a sheet transporting direction, the second image forming apparatus being capable of receiving the sheet discharged from the first image forming apparatus which has the first image formed on the first side thereof, and forming a second image on a second side of the received sheet, for the double-sided printing by the tandem-outputting,
• wherein the first image forming apparatus includes:
• a first image forming section which performs image formation on the sheet;
• a first fixing section which performs image fixation on the sheet on which the first image forming section performs the image formation;
• and
• a first control section which is configured to control the first fixing section to set a tandem-outputting target fixing temperature for the double-sided printing to be lower than a first fiducial temperature serving as a non-tandem-outputting target fixing temperature at which the first image forming apparatus performs the image formation and the image fixation alone.