Procedure for manufacturing a laminated package for solid products in powder or grain form, as well as a package obtained by this procedure

A method for manufacturing a laminated formed package for solid products in powder or grain form, said package being made from a coil of printed and laminated material which defines an outer shape of a template of the package, a window at a top of one side of the package, an opening injected-plastic dispensing mouth positioned in the window, and a set of main stiffening notches set in front and rear faces of the package, the method comprising the steps of:

• making a set of notches in said coil of printed and laminated material, said notches including main notches and secondary notches corresponding to front and rear faces of the formed package, and third notches corresponding to the lateral face opposite that of the dispensing mouth;
• die-stamping the outer shape of the template of the package;
• die-stamping the window which receives the dispensing mouth;
• folding and welding the template around a retractile plunger, thereby forming a tubular body;
• fitting and welding a frame of the dispensing mouth around the window, with the dispensing mouth further including a moving body connected with the frame;
• folding and joining flaps forming an upper face of the package by welding, such that a front flap thereof overlaps a rear flap thereof, and lateral flaps being positioned to an inside under the front and rear flaps;
• turning the moving body of the dispensing mouth over a joining hinge with the frame, and inserting the moving body into the window which forms the frame, until the dispensing mouth is closed;
• fitting a seal over the dispensing mouth;
• turning the package over to leave the upper face facing downward and a lower face of the packaging, which is open, facing upward;
• filling the package with the solid product;
• folding and welding by ultrasonic welding flaps of the lower face, which are facing upward, with lateral folds being position outward therefrom;
• folding the welded flaps, and folding and sticking the lateral folds over a surface of the lower face;
• and
• turning the package over to leave the upper face facing upward and the lower face facing downward.