Abstract: A tape mini-cartridge is functionally compatible with a larger industry standard tape cartridge. A mini-cartridge adapter adapts the mini-cartridge to be compatible with a standard tape drive by presenting the standard structural and functional appearances to the tape drive as presented by the larger standard tape cartridge. Since the standard cartridge has a plurality of structural elements including reel locks, leader buckle guide, and write protect flag engaged by the standard drive, the cartridge adapter effectively transfers these engagements and forces to and from the mini-cartridge in a manner providing full structural interchangeability with the standard tape cartridge.

Abstract: The invention relates to a break-resistant tape cartridge. Reinforcing ribs on the housing and door of the cartridge protect against breakage. The reel and brake of the cartridge employ short teeth with widened roots that strengthen the teeth and reduce shear forces which might cleave the teeth from the reel or the brake. An extra lobe on the hinge of the door reinforces the hinge. The door and the housing are made of a plastic that lacks glass fibers or has a reduced glass fibers content. Furthermore, the plastic without glass fibers improves wear-resistance, and reduces production of debris that can damage the tape and devices that read the tape. The result is a cartridge which is less prone to breakage and wear. The reel may be used in applications other than tape cartridges.

Abstract: A locking system for preventing a take-up reel of a tape drive from rotating when a tape cartridge is not inserted to the drive. Locking elements are defined about the take-up reel, a buckling mechanism, and a load ring to interact and provide locking engagement to prevent take-up reel rotation. The take-up reel, buckling mechanism and load ring rotate in concert during insertion and removal of the cartridge and are positioned relative to each other such that as the tape cartridge is inserted to the tape drive, locking elements disengage to enable rotation of the take-up reel. As the cartridge is inserted into the drive, locking elements return to locking engagement.