Blenders - Paddle Blenders consist of a U-shaped horizontal trough and a fabricated paddle agitator. The paddle agitator includes multiple paddles positioned to move materials in opposing lateral directions and radially. The paddle design is normally applied where friable materials are being blended and when batches as small as 15% of the total capacity are going to be mixed in one blender. Paddle designs are available in working capacities to over 515 cu.ft. capacity.