. . . "on, and includes novel features which may best be made clear by reference to the specification, claims and the accompanying drawings, in which: FIGURE-l is a perspective view of a table model of the oven according to this invention, with the oven door and related elements omitted for clarity; FIGURE 2 is a full section elevation view of the lower left-hand corner o-f the oven in FIGURE l; FIGURE 3" .