Abstract: A package in form of a box for airtightly and liquidtightly containing contents such as liquids is folded from a sheetlike blank. In a first step the box is folded to a tubular sleeve being joint along an lapping joint (7), the box innerside being covered by a liquidtight layer, preferably a plastic material. The box comprises both a lock and a bottom providing folding tongues projecting from each wall at the corresponding ends of the box. A sealing foil (5) is applied over the opening of at least one end of the box, the foil (5) being sealed at both the folding tongues and the box corner portions. The folding tongue or tongues, over which the lapping joint is stretching consists of two tongue parts (9, 10) partly lapping each other. The (10) of these tongue parts (9, 10) lying outside of the other tongue part (9) is provided with a folding edge (6) joining the other tongue part final edge.

Abstract: The present invention briefly relates to a package box (11) for the liquid tight sealing of the contents, preferably a liquid, which box (11) is folded from a cardboard blank, the side of which facing inwardly in the package box (11) is coated with a thin layer of plastic. The closing flaps (12a, 13, 14, 15) extend each from its corresponding wall of the box (11) and are delimited from respective wall by a folding line (17). The longitudinal corner (19) of the box (11) between box bottom and lid is defined by two parallel folding lines (24, 25) and the recesses separating the flaps (12a, 13, 14, 15) terminate at a distance from the folding lines (17) of the flaps (12a, 13, 14, 15). The recesses preferably terminate in a section, the flange (23) of which is parallel to the folding lines (17) of the flaps (12a, 13, 14, 15) the length of such flange portion corresponding essentially to the distance between two parallel corner lines (24, 25).