Abstract: A fixing device comprises a heating roller for heating a paper sheet, a pressure roller in rolling contact with the heating roller and adapted to press the paper sheet against the heating roller, and a temperature sensor and a humidity sensor for detecting the temperature and humidity, respectively, of the outside air. The temperature of the heating roller is controlled and the pressure loading of the pressure roller is controlled in a stepless manner by means of a temperature control section and a pressure control section in accordance with the outside air temperature and humidity detected by means of the temperature and humidity sensors, respectively.

Abstract: In a transfer-type electronic copying machine including a photosensitive drum, charging device, exposure device, developing device, transfer device, and separating device, the separating device of this invention has a separating section for separating a recording sheet bearing a toner image thereon from the surface of the photosensitive drum. The recording sheet is guided by a guide roller facing the photosensitive drum and having a slit formed therein, and is brought in contact with a conductive brush through the slit to be de-electrified.