Abstract: A packaging machine having a working reach interconnected with a return reach over which flight bars are movable is provided with a ramp formed with a long radius for interconnecting the working reach with the return reach. This long radius ramp eliminates the tendency for flight bars to accelerate at an unacceptable velocity and can lead to damage to adjacent cartons. The long radius together with a sprocket of increased diameter avoids exposure to the risk of damage to and breakage of cartons. This increased radius also tends to provide a gap between the working reach and an outfeed conveyor which is longer than that normally employed with conventional structures. This gap is bridged by rotatable support wheels having cutaway radial areas which afford clearance for flight bars on their way from the working reach to the return reach.