Mixer

In combination with a mixer comprising a mixing receptacle having an axis of symmetry, a top at one end of the axis and an outlet end at an end of the axis opposite to the one end;

• a conveying screw in the receptacle, the conveying screw being rotatable about its axis and epicyclically, and having an end adjacent the one end of the axis and an opposite end adjacent the opposite axis end for conveying mixed material to the outlet end of the receptacle;
• and a universal joint coupling the opposite end of the conveying screw to the outlet end of the receptacle;
• a drive for the conveying screw mounted at the top of the receptacle, the drive including
• 1. a motor,
• 2. a first rotary member arranged to be driven by the motor about an axis of rotation,
• 3. a second rotary member mounted for rotation with an axis of rotation radially spaced from the axis of rotation of the first rotary member,
• a. the second rotary member supporting and rotating the end of the conveying screw adjacent the one axis end at a point radially spaced from the axis of rotation of the second rotary member;
• and
• 4. means coupling the second rotary member to the motor to be driven thereby, rotation of the first and second rotary members by the motor causing the conveying screw to be rotated about its axis and epicyclically.