Method for manufacturing packages for liquid products, especially liquid foodstuffs and a package obtained through this method

A method for manufacturing a package for a liquid food product, said method comprising the steps of:

• unrolling a flexible sheet material, from a web (35), mutually juxtaposing longitudinal strips (6) of the sheet material, folding the sheet into a tubular member (2) such that said longitudinal strips (6) are turned outwards;
• providing an internal longitudinal welding line (7) and an external longitudinal welding line (8), on said longitudinal strips (6) to join the strips to one another, to define a detachable portion (9), in the form of a channel compartment (10);
• forming folded edges (2a) at corners of the tubular member (2) to form a substantial parallele piped-shaped package (1) having a pair of opposite sides (4), a pair of opposite faces (3), a bottom and a top, the channel compartment having a lower end in communication with an inside of the package (1);
• stiffening the folded edges (2a) by providing longitudinal welding lines (5);
• making a transversal weld on a bottom end of the tubular member (2), at least one transversal lower welding line (16) extending over the detachable portion (9) to define the bottom of the package (1);
• dosing the liquid food product into the tubular member (2), folding the detachable portion (9) onto a corresponding side (4) of said tubular member (2);
• transversely welding a top end of the tubular member (2), at least one transversal upper welding line (15) defining a sealed top of said package (1).