Charles Ross & Son Co.
The model 42NSD ribbon blender features a discharge screw positioned across the entire bottom of the trough with very close tolerances between the screw and the trough. The screw runs forward only during the discharge cycle and in reverse during the blending cycle. This helps to eliminate dead zones and enhances mixing. The advantages of this design include: the ability to discharge continuously at variable rates to match downstream packaging operations; removable screw for cleaning purposes; less dead space, thus more thorough blending; and complete discharge.