Patent ID: 8727469

Claim:
An image forming apparatus comprising: a conveying unit that conveys a recording medium; a liquid droplet jetting head that jets liquid droplets onto the recording medium conveyed by the conveying unit; a uplift amount detection unit that is provided at the recording medium conveying direction upstream side of the liquid droplet jetting head, projects and receives light along the conveying unit, and detects an uplift amount of the recording medium; a control unit that lowers the conveying speed of the conveying unit or separates the liquid droplet jetting head from the conveying unit when the uplift amount detected by the uplift amount detection unit is a threshold value or greater; a temperature detection unit that detects temperatures; and a correcting unit that corrects the threshold value or the uplift amount based on the temperature difference between a temperature detected by the temperature detection unit at the periphery of the uplift amount detection unit and a temperature detected by the temperature detection unit at the periphery of the liquid droplet jetting heads.