Archival storage unit for optical disc memory cassettes - incorporates grippers driven by stepping motor programmed in accordance with properties of disc drives installed in pairs

摘要

Vertical frame members (30) separate five columns (32A-32E) of equal width in which compartments (34) provided for standard optical disc cassettes are arranged, pref. in stacked modules e.g. of moulded polystyrene. Disc drives (44) incorporate cassette insertion and withdrawal slots (46). Back-to-back pick-up devices with grippers are arranged in a holder (50) and driven by a servomotor (60) and worm gear (54). The holder is raised and lowered on parallel vertical bars (70) by a chain drive (92) from a servomotor (94). USE/ADVANTAGE - For storage and retrieval of documents and records, speed, reliability and flexibility of archiving are improved.