Ribbon Blenders are based on a proven agitator construction that provides a triple mixing action ensuring fast, efficient blending. The dimensions and configuration of the ribbons are carefully balanced to provide a movement of material within the container that avoids dead spots and gives rapid product discharge. Triple Mixing Action – The Key to Fast, Efficient Blending. As the agitator rotates, the material is tumbled and carried radially around the inside of the blender. The pitch of the outer ribbon moves the material toward the discharge opening. The inner ribbon which has an opposing pitch moves the material away from the discharge opening.