pan mixer

open-top mixer

A mixer filled through an opening at its top; for concrete, usually a pan or drum within which mixing blades revolve about the vertical axis; for mortar, usually a trough within which mixing paddles revolve about the horizontal axis.
References in periodicals archive ?
ACT/Wiggert HPGM 4500 planetary countercurrent pan mixer and 600 tons of heated aggregate storage.
The technology augments fast, clean discharge, and is available in on the Black Edition Multi-Mix and Permat standard planetary and high speed pan mixer models.