The reconditioned Model DPM-4 double-planetary mixer (photo) has been restored to as-new working condition and offers the same standard one-year warranty as a new mixer. Especially effective for thick and sticky semi-solids, the patented High Viscosity (HV) Blades rotate on their own axes, while orbiting the mixing vessel on a common axis. The blades continuously advance along the periphery of the vessel, pushing materials forward and downward, while transporting product from the sidewalls to the interior. They are lowered and raised from the mix vessel by an air/oil hydraulic lift. Safety limit switches prevent the operation of the drive when the stirrers are in the raised position or when the mix can is removed. — Charles Ross & Son Company, Hauppauge, N.Y.