http://www.nbe-inc.com/bbd Bulk bag discharging of dry bulk materials having semi free-flowing to non free-flowing characteristics is done quickly and completely using the National Bulk Equipment automatic bulk bag loop retractor. The automatic loop retractor design draws the bulk bag corners up and in to form the bulk bag into a conical shape. The bulk bag shape speeds the flow of material from the bag and ensures that all of the dry material is completely unloaded from the bulk bag.