IMAGE FORMING DEVICE

PURPOSE:To eliminate wrinkles of developing paper and dislocation of a devel oped part and to stabilize pressure development by providing plural pressure developing devices composed of pressure rollers having roller width of the developing paper. CONSTITUTION:When a microcapsule paper 11 is exposed by an exposing device 15 and a developing paper 21 in size A3 for instance is fed from a cassette 29, the exposure part of the paper 11 and the paper 21 are pressed between the pressure rollers 22a and 22b of a first pressure developing device 20. After an image is formed on the paper 21, the paper 21 is fed to a heat fixing device passing through between the released rollers 32a and 32b of a second pressure developing device 30. When a developing paper 31 in size A4 for instance is fed from the cassette 39, it passes through the released rollers 22a and 22b of the device 20, is pressured between the rollers 32a and 32b of the device 30 and is heat-fixed by the heat fixing device.