Abstract: An apparatus is described for welding the sealing seam (23) on a package (24) and which consists at least partially of synthetic plastics coated paper, with a welding tool comprising dies (25, 28) and counter-dies, a support and a drive means (1) for generating the pressure force.So that two welding tools (25, 25a) can be used and operated simultaneously and so that substantially the same pressure forces are available at both working stations, it is according to the invention envisaged that two welding dies be mounted on respective outer hollow shafts (7, 9) in such a way as to be rotatable about a common axis (2), each outer hollow shaft (7, 9) being rotationally rigidly connected to a common torsion spring (3) as part of the drive means (1) (at 14, 16, 17), the torsion spring (3) being driven from outside (at 11, 12).

Abstract: The invention describes a liquids package having side walls as well as upper and lower walls serving as top and bottom respectively, a side wall and the top having a sealing seam (6) extending along edges (14', 16') of adjacent wall panels (14). So that the package may have a smooth outer surface in the region of sealing seams, without the formation of synthetic plastics beads or the like, it is according to the invention envisaged that the outer surface (22, 23) of the two wall panels which are connected to each other by the sealing seam (6) are disposed to merge steadily into each other via the gap (24) along at least one end face of an edge (14') which belongs to the relevant wall panel (14) so that the other surfaces are flush in cross-section, and in that the sealing seam (6) is masked on the inside of the package by a synthetic plastics bead (21).