Steam distribution apparatus with removable cover for internal access

An apparatus to distribute steam to a moving sheet, the apparatus having a leading edge and a trailing edge relative to the moving sheet, the apparatus comprises:

• (a) a steam distribution header;
• (b) a housing comprising a plurality of partition panels that are spaced apart along the length of the apparatus to form a plurality of discharge chambers that are covered with one or more front perforated screen plates with each perforated screen plate having an exterior surface with a contour that matches that of the moving sheet, wherein each discharge chamber is in fluid communication with the steam distribution header through a conduit that has an inlet in the steam distribution header and an outlet in a discharge chamber and wherein each discharge chamber includes a lower wall that defines a sealable access slot that is tightly covered and wherein the one or more front perforated screen plates are welded to the plurality of partition panels so that the one more front perforated screens plate are permanently secured onto the plurality of partition panels;
• and
• (c) means for controlling the flow of steam from the steam distribution header to each discharge chamber.