A gasket-free, low-maintenance cover, reinforced troughs for pressure and vacuum applications and clamshell coupling for quick agitator removal are among the features this company has introduced for its ribbon blender models. Other new features include heavy-duty construction for dense materials, end-wall scrapers and a bottom-discharge extruder. The ribbon blenders are suitable for blending dry powders, granules, pellets and other solids. They can also function as paste mixers, vacuum dryers and granulators. The ribbon blender mixes products in a U-shaped trough with a horizontal agitator that can be interchanged with a paddle agitator for gentler blending of shear-sensitive materials. — Charles Ross and Son Co., Hauppauge, N.Y.