Abstract: An elastic band expander tool has a base plate and a cam plate rotatably secured to each other for rotation about an axis. The cam plate has three slots, each of which curves inwardly towards the axis at its outer end. The base plate has three expander bars moveably mounted on it, each of which has a finger extending therefrom and a cam pin for moving in an associated cam slot. When the cam plate is rotated on the base plate, the cam pins ride in the slots and move outwardly away from the axis. This movement causes the expander bars to move outwardly, thereby expanding an elastic band fitted about the fingers. When the cam pins reach the end of their respective cam slots, the tool locks in place, to provide hands-free operation.

Abstract: An elastic band expander tool has a base plate and a cam plate rotatably secured to each other for rotation about an axis. The cam plate has three slots, each of which curves inwardly towards the axis at its outer end. The base plate has three expander bars moveably mounted on it, each of which has a finger extending therefrom and a cam pin for moving in an associated cam slot. When the cam plate is rotated on the base plate, the cam pins ride in the slots and move outwardly away from the axis. This movement causes the expander bars to move outwardly, thereby expanding an elastic band fitted about the fingers. When the cam pins reach the end of their respective cam slots, the tool locks in place, to provide hands-free operation.