An image-forming machine includes a supporting structure and a process unit to be mounted on the supporting structure. The supporting structure has a lower frame member and an upper frame member mounted on the lower frame member so as to be free to pivot between an open position and a closed position....http://www.google.com.au/patents/US5005053?utm_source=gb-gplus-sharePatent US5005053 - Image-forming machine having a process assembly comprising two independently movable units
