Airfoil apparatus for a system having a controlled internal environment

An assembly comprising:

• a system having a controlled interior environment comprising a cabinet defining an internal chamber, upper and lower nip rollers mounted on the cabinet and forming a nip through which a web of material can pass;
• and
• an airfoil assembly comprising an upper airfoil cantilevered from the cabinet, the upper airfoil comprising a first wall and a second wall, the first wall having a rear end, a forward end, an upper surface and a lower surface, the rear end of the first wall being attached to the cabinet proximate to the upper nip roller such that the forward end is spaced from the cabinet, the second wall having a top end, a forward surface and a rearward surface, the second wall extending upwardly from the upper surface of the first wall and at an angle relative to the first wall, a lower airfoil cantilevered from the cabinet, the lower airfoil comprising a first wall and a second wall, the first wall of the lower airfoil having a rear end, a forward end, an upper surface and a lower surface, the rear end of the first wall being of the lower airfoil attached to the cabinet proximate to the lower nip roller such that the forward end of the lower airfoil is spaced from the cabinet, the second wall of the lower airfoil having a top end, a forward surface and a rearward surface, the second wall of the lower airfoil extending downwardly from the lower surface of the first wall of the lower airfoil and at an angle relative to the first wall of the lower airfoil.