Abstract: An air director for balancing air flow during a perpendicular change in air flow direction, comprising a frame defining an outer perimeter and having an inner annular opening therein, a plurality of air-directing vanes positioned on the frame between the perimeter and the annular opening thereof in spaced-apart relation around the perimeter thereof for directing air therethrough from the perimeter and perpendicularly through the annular opening, the vanes positioned on the frame with opposed, major, air-directing surfaces defining a extended line having a predetermined angular offset relative to the radii of the annular opening for swirling the air.

Abstract: A raceway for a power chain for a carriage adapted to traverse an apparatus on a preset path. The power chain carries conduits for supplying power or control fluids to the carriage. The raceway allows movement of the power chain along the length of the apparatus but prevents lateral and upward displacement of the chain out of the raceway.