Abstract: A packaging machine is provided for packaging bundles, optionally under compression, with tensionless cross-seals. One problem of conventional devices is that movable sealing bars tend to rupture film as it is pulled together around materials to be packaged, particularly if the materials are relatively high or heavy. Packaging products under compression is an additional challenge. In this instance, packages are generally fed substantially at a predetermined speed between upper and lower webs of film, which are then sealed at their sides. Compression of the products being packaged may be optionally practiced during such side seal formation, and later during cross seal formation. Subsequently, the products enclosed in the side-sealed web of films move into a cross seal area, optionally including a reciprocatable carriage, operation of which in effect causes the product being sealed to move backwards relative to seal bars forming a cross seal therefor.