Recording cartridge having a flat smoothing plane with a raised portion

摘要: An improved recording cartridge contains a flexible magnetic disc. The lower interior major surface of the provides smoothing plane for disc positioned inside to allow rise slightly above on cushion air while is in rotation. To enhance stability and make conform more readily shape head transducer, includes raised portion thereon. This gives added rigidity prevents it from flying away during penetrations horizontal movement. remainder relatively flat, thereby permitting thin configuration be used.