Dual shaft pan mixer

A dual shaft pan mixer comprising a mixing vessel including a first and a second pan section, a pair of paddle assemblies having drive shafts which are disposed horizontally and in parallel relationship with each other within the mixing vessel and adapted to rotate in mutually opposite directions, and a drive source for synchronously driving the pair of paddle assemblies, the mixing vessel having a substantially triangular space below a region intermediate the first and the second pan section and displaced out of the loci of rotation of the paddle assemblies, the vessel having a discharge port located adjacent to the space, further comprising rod-shaped vibrator means disposed within the space and extending in a direction parallel to the drive shafts, the vibrator means being effective to apply vibrations to a mixture which is alternately driven into the space as a result of a mixing operation by the paddle assemblies.