weight molecular or teflon and holds or retains a quantity of liquid cryogen such as for example liquid nitrogen 16 this is accomplished by the plate 12 having an upper surface 18 and an edge 20 extending upward therefrom to retain a select amount of the liquid nitrogen 16 on the upper surface 18 as shown in fig1 the edge 20 extends along an outer perimeter or periphery of the plate 12 but can also be constructed to extend along the plate at another area thereof where necessary to retain the liquid nitrogen the plate 12 is formed with at least one or a plurality of holes 22 or apertures therethrough each one of the holes 22 having an edge 24 turned upward away from the conveyor belt 11 to facilitate the flow of gas as described below the holes 22 can be arranged in a myriad of different patterns at the plate 12 the raised or elevated surface area 24 extends around each one of the holes 22 to prevent the liquid nitrogen 16 from pouring or seeping through the holes 22 before the nitrogen has been atomized the raised surface area 24 functions as a dam and can be formed on the upper surface 18 by for example either pressing the plate 12 to have the upper surface 18 between the raised surface areas 24 in relief as compared to the areas 24 with same extending above the upper surface 18 as shown in fig2 or by providing a wall of material to extend upward around the edges.