Abstract: A buckling mechanism for improving buckling reliability between a take-up leader and a cartridge leader. The mechanism includes a buckling link, buckling arm and a link driver. The buckling link is biased about one end and includes a protruding portion having a T-shape face at the other end. The combination of the dimensions of the protruding portion and the constant biasing force ensures that the leaders are positioned and remain in position for successful buckling as the tape cartridge is inserted into the tape drive. The buckling link is mounted such that it functions independently of the link driver and buckling arm, enabling the buckling link to maintain the biasing force against the take-up leader even after the buckling arm releases the take-up leader.