Abstract: A container making machine for forming a plurality of identical equidistantly spaced recesses in aluminum strips which are subsequently welded to each other to form compartments for reception of suppositories or the like, in which the strips prior to the forming of the recesses therein are first provided with closely spaced small corrugations extending transversely to the strips to permit the subsequent forming of relatively deep recesses therein without tearing of the strip material. The machine includes corrugation forming rollers, recess forming means downstream of the rollers, heat welding means downstream of the recess forming means, and means for transporting the strips stepwise through the nip of the corrugation forming rollers, the recess forming means and the heat wleding means.