Towline are conveyors that are embedded in the floor or are low to the ground.
Chain on Edge conveyors consist of an embedded track with chain carried by trolleys. They require two tracks for a straight run, a live track and a return track. Chain on edge towlines are more flexible as they can make any curve desired.
Chain on flat towlilne conveyors are a more cost effective approach to conveying dollies. The cost savings of a chain on flat system come from a simpler chain and can return in the same track that is conveying the product. A chain on flat cannot, however make curves.