Abstract: An inserting machine is provided with mechanisms which allow it to operate in conjunction with a rotary printing press. In a preferred embodiment, the inserting machine is driven synchronously by the press and is fed newspaper jackets directly from the printing press without the need for intervening jacket feeders or stackers. A diverting mechanism which oscillates is positioned previous to the shingling operation of the press folder to divide the single press stream into multiple streams by diverting alternate jackets to different conveyors which are driven at a slower throughput. The divided streams of jackets are transported via the conveyors to an inserting machine which has two inserting lines arranged in a tandem configuration in order to insert at double the speed of a single line inserter and also in order to compensate the folds in the stacks and to output a bundle rather than a stream.