Abstract: Cooling-bladder assembly for installation around the mixing chamber of a sandmill or the like is provided having a pair of semi-circular bladder halves with inner and outer walls for defining an enclosure. Inlet and outlet ports connected to a suitable pump circulate coolant fluid through the enclosure, the bladder halves being secured together at the opposed vertical edges. Spacers in the form of hollow pipe section are connected to the inner and outer walls of the bladder for maintaining the integrity of the enclosure and for creating turbulence in the coolant fluid. A heat transfer or conductive paste may be applied to the outer wall of the mixing vessel or to the adjacent inner wall of the bladder to facilitate the transfer of heat from the sandmill mixing vessel to the bladder assembly.

Abstract: A stirring device attached to the vertical shaft of a sand mill having an annular metal collar received on the shaft and a flat, plastic, circular disc extending radially beyond the collar for a stirrer member concentrically affixed to the radial surface of the collar. The stirrer member has an outer ring and a central hub which are joined by circumferentially spaced spokes.

Abstract: A stirring device attached to the vertical shaft of a sand mill having an annular metal collar received on the shaft and a flat, plastic, circular disc extending radially beyond the collar for a stirrer member concentrically affixed to the radial surface of the collar. The stirrer member has an outer ring and a central hub which are joined by circumferentially spaced spokes.