An image forming apparatus provided with a process cartridge which contains at least an image carrying body fixed therein. The process cartridge is slidably provided to a main frame of the apparatus and is adapted to occupy two positions of a first position to perform the image forming and a second position...http://www.google.com/patents/US5262824?utm_source=gb-gplus-sharePatent US5262824 - Image formimg apparatus with automatic process cartridge displacement for maintenance
