Abstract: A support is provided including a lower stationary horizontal plate and a generally horizontal support arm is spaced above and extends over the lower plate. The portion of the support arm disposed in vertical registry with the lower plate has an upper plate supported therefrom closely overlying the lower plate and a first end portion of the support arm is pivotally supported from the support for oscillation about a horizontal axis extending transversely of the support arm. Structures for heating the upper and lower plates are operatively associated therewith and a motor having a rotatable output shaft is mounted on the support and a pitman arm is removably operably connected between the rotatable output shaft and an extension of the pivoted end portion of the support arm for oscillation of the arm and swinging movement of the upper plate about the axis of oscillation of the support arm toward and away from the lower plate in response to rotation of the shaft.