
In a tape cartridge which turnably holds within a housing a single tape reel on which a length of tape is wound, the tape reel consisting of an upper flange, a lower flange, and a hub which is open at top and is closed at the bottom, the hub having a metal disk in the center of the outer bottom surface and teeth formed around the outer periphery of the metal disk for engagement with a drive shaft of a recorder, the underside of the hub having throughholes for engagement with a brake release plat...











