Patent ID: 8045289

Claim:
A tape cartridge comprising a tape reel that is rotatable about an axis of rotation and adapted to cooperably engage a reel drive member of a data transfer apparatus which, in use, applies a drive torque to the tape reel to rotate the tape reel about said axis of rotation, said tape reel having opposite ends with a centre height that is midway between said ends and being adapted to receive a free end portion of a said reel drive member through one of said ends such that said cooperable engagement between the tape reel and the reel drive member takes place internally of the tape reel at a location or locations between said centre height and said one of the ends, and said cooperable engagement being such as to secure the tape reel to the reel drive member to at least substantially prevent tipping of the tape reel with respect to said reel drive member; wherein said tape reel comprises at least one camming surface that extends helically with respect to the axis of rotation and that is cooperably engageable by said reel drive member to secure the tape reel to the reel drive member.