Abstract: A valve structure is provided for controlling the discharge flow from a mixing apparatus. The mixing apparatus includes a mixing bowl with a discharge opening therein. The valve includes a paddle member dimensioned to conform to and close the discharge opening in the mixing bowl. A first actuator is provides for selectively moving the paddle member between a closed position, wherein the paddle member overlaps and covers the discharge opening, and an open position, wherein the paddle member is displaced from covering the discharge opening. A second actuator mechanism is provided for selectively moving the paddle member into a sealing engagement with the bowl discharge opening, when the paddle member is in the closed position, and displaced from engagement with the bowl opening, prior to movement of paddle member to the open position by the first actuator.

Abstract: An apparatus is provided for heating and processing a product. A mixing bowl includes a rounded base portion, an extended upper portion and two end walls. An agitator is positioned within the base of the bowl for rotation about a rotational axis and in a closely spaced relation with the bowl. The agitator includes a drive shaft having a portion thereof projecting outwardly of the mixing bowl. The agitator having a rotational path closely spaced with the inside wall of the base portion and spaced from the upper portion of the bowl. An outwardly flared transition maybe provided between the base and upper portion of the bowl. A microwave energy source is directed into the bowl for heating the product. A choke surrounds the agitator shaft to form a seal for the bowl to prevent microwave leakage.