Continuous-flow conveyors closed-belt conveyor

FIG. 21-9 Closed and open flights for continuous-flow conveyors, (a) and (h) Conveyor-elevator, (c) Horizontal conveyor with side-pull chain, (d) Detail of closed-belt conveyor opening and closing rollers mesh and unmesh teeth in the same manner as a conventional clothing fastener. (FMC Cotporation, Material Handling Systems Division Stephens-Adamson Division, Allis-Chalmers Cotporation.)... 

As employed here, the term relates to material handling devices which run continuously. The material itself may be carried along in a continuous flow (e.g., on a belt conveyor) or in individual receptacles which may be very closely spaced (e.g., on a bucket conveyor) or farther apart (e.g., on a bucket elevator) or indeed some considerable distance apart and possibly detachable (e.g., on aerial ropeways or tramways). 

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