HAUPPAUGE, NY – Charles Ross & Son Co., a manufacturer of specialty mixing, blending, drying and dispersion equipment, recently completed its 3000th Double Planetary Mixer, which was first introduced in the mid-1940s. Today, the mixers are commonly used for preparing viscous formulations, wet granulations and abrasive suspensions. These machines are also utilized as vacuum mixer/dryers for transforming pastes and slurries into free-flowing powders.