Accumulation Conveyors hold product in place until they are signaled to resume conveying. Accumulation conveyors may be roller, belt, or chain conveyors. Applications include feeding product to a machine at a specified rate, or to hold all items in a batch until they are needed for the next process. This is useful when a line of packages need to be accumulated without pressure so that they can be utilized in a process such as loading, sorting, taping, strapping, palletizing, or picking. Accumulation conveyors may be minimum back pressure or zero back pressure.