Patent ID: 7272839

Claim:
A storage medium library comprising: a plurality of storage medium plates to be rotated for recording or retrieving information to or from the storage medium plates; an accommodation unit for retaining the storage medium plates; a drive unit for recording or retrieving information with respect to the storage medium plates; and a plate transfer mechanism for transferring the storage medium plates between the accommodation unit and the drive unit; wherein each of the storage medium plates includes a recording section and a handling section formed integral with the recording section to produce a one piece which is rotatable as one piece for recording or retrieving information to or from said each storage medium plate, the handing section being formed with a plurality of engagement recesses, wherein the accommodation unit includes a plurality of support members coming into contact with the handling sections of the respective storage medium plates for supporting the storage medium plates, wherein the transfer mechanism includes a movable unit for transferring the storage medium plates between the accommodation unit and the drive unit, the movable unit being provided with claws coming into engagement with the recesses of the handling sections of the respective storage medium plates, wherein each storage medium plate comprises a recording section and a handling section formed integral with the recording section for rotation therewith, the handling section being formed with a plurality of recesses into which claws are inserted when the storage medium plate is transferred, wherein the accommodation unit is provided with supporting members coming into contact with the handling sections of the respective storage medium plates for supporting the plates.