Abstract: A method of forming packages in which a first thermoformable strip is provided with a plurality of parallel longitudinal grooves or depressions, the grooves are filled with a material to be packaged, and the grooves are then covered by a sealing a second, flat strip to the regions of the first strip between the grooves and along the edge margins thereof. The grooves are formed sequentially from the center of the first strip outwardly toward the side edges in pairs. The filled and covered continuous article is then transversely sealed and severed into individual packages. A machine for performing this method includes a forming plate having a longitudinal parallel grooved surface, means for moving the strip along the surface, and a plurality of forming rolls, each roll having pairs of annular ridges which press the strip into the grooves on the plate to form the depression.