Abstract: An Accumulator Conveyor having plural zones in which beds or tracks of closely positioned roller elements provide a planar support for moving chains or driven endless elements in successive zones, each zone separately driven from the others. At each end of the zone is a shaft which extends across the conveyor. A drive is connected to each shaft and drives the chains or driven endless elements at one end of each zone and the endless elements idle over the shaft on the other end. The drive is selectively energized to result in an extremely low friction conveyor and is coordinated to result in the accumulating function. In each successive zone the bed or track is offset or staggered from the next in parallel aspect in providing planar bridging support of the endless elements across each of the zone transitions.