A robotic system includes a series of cassettes holding blank centrally apertured disks which are ejected in seriatim from each cassette and a plug inserted into the disk central aperture by manipulation of a robotic arm at that cassette position. Each disk is transported by the robotic arm and inserted...http://www.google.de/patents/US4735540?utm_source=gb-gplus-sharePatent US4735540 - Robotic disk handler system
