Patent ID: 7912392

Claim:
An image forming apparatus, comprising: an image forming part which forms a toner image on a recording medium; a fixer including a heating member and a pressure member, which transports the recording medium sandwiched therein, while fixing the toner image on the recording medium with heat and pressure; a reverse transport part which reverses and forwards the recording medium transported from the fixer to the image forming part; a toner image sensor which detects presence of the toner image on the recording medium; a humidity sensor which detects humidity inside the image forming apparatus; a first temperature sensor which detects a surface temperature of the heating member; a second temperature sensor which detects a surface temperature of the pressure member; and a controller which controls the image forming part, the fixer, and the reverse transport part, wherein, when a glossy image formation mode is selected and no toner image is detected on the recording medium, the image forming part does not form a toner image on the recording medium, the fixer performs a first heating and pressing process and transports the recording medium to the reverse transport part, the reverse transport part transports the recording medium to the image forming part, the image forming part forms a toner image on the recording medium transported from the reverse transport part, and the fixer performs a second heating and pressing process and fixes the toner image on the recording medium, and wherein the controller controls the fixer based on the humidity inside the image forming apparatus, the surface temperature of the heating member and the surface temperature of the pressure member.