Patent ID: 6976311

Claim:
An apparatus comprising: a first knife; a second knife; wherein the first knife includes a first attachment device; wherein the second knife includes a second attachment device; wherein the first attachment device and the second attachment device can be attached to each other to attach the first knife to the second knife; wherein the first attachment device and the second attachment device can be detached from each other to detach the first knife from the second knife; wherein the first attachment device is comprised of a first plate having an opening; wherein the second attachment device is comprised of a protrusion; wherein the protrusion of the second attachment device can be inserted into the opening of the first plate to attach the first knife to the second knife; wherein the second attachment device is comprised of a second plate attached to the protrusion; and wherein the first attachment device is comprised of a third plate having an opening which is substantially aligned with the opening of the first plate, end wherein the protrusion can be inserted into the opening of the third plate to attach the first knife to the second knife; and wherein the protrusion can only be inserted into the openings of the first plate and the third plate when the second plate is at an angle with respect to the first plate and the third plate; and wherein after the protrusion has been inserted into the openings of the first plate and the third plate, and while the protrusion resides in the openings of the first plate and the third plate, the second plate can be put into alignment with respect to the first plate and the third plate by rotating the second plate with respect to the first and the third plates until the second plate becomes aligned with respect to the first and the third plates.