Abstract: Apparatus and method for dispensing elastic members in connection with orthodontic work wherein a cartridge of such members in an undistorted shape is located between a body and a piston. The body has a tapered surface and a generally cylindrical surface. The piston slides in a sleeve, but is not rotatable therein, and a clamp engages an elastic member to move it as the sleeve is moved, over the conical surface of the body and to expand the member onto the cylindrical surface and over the same onto the device to which it is to be mounted.