Process for manufacturing a tubular package, and package obtained by the implementation of the process

A process for manufacturing a tubular package having a tubular body made of a rigid material, a bottom and a lid joined to said body in an impermeable manner, a diaphragm attached between said body and lid, said bottom, lid and diaphragm made of the same or similar rigid material as said body, the process comprising the steps of:

• (1) forming said body;
• (2) forming a first lid cup from a piece cut from a reel of rigid material by drawing said material using a male forming tool and a first external die;
• (3) forming a second lid cup from a piece cut from a reel of a second material by drawing said second material using said drawing tool for forming said first lid cup and a second external die located on a path of said drawing tool between said first external die and said tubular body,
• said forming step for forming said second lid cup includes the step of forming said second cup to contact a lower face of the first cup at least over part of the height of the lateral surface thereof;
• (4) inserting simultaneously the combination of first and second lid cups in a first end of said body using said male tool via one of the ends of said tubular body held from the outside, near said end by jaws,
• (5) joining at least the upper third of said walls of the first and second cups in an impermeable manner to the inner side wall of the body,
• (6) prescoring the lateral surface of the tubular body along a peripheral line located between a first joint area for joining said first cup to the inner wall of the tubular body and a joint area for joining said second cup, the one forming said diaphragm, to the inner wall of the tubular body,
• (7) providing for opening of the lid without tearing said diaphragm,
• said step of prescoring being selectively produced either along part of the peripheral line if it is a package with a hinged lid, or right along it, if it is a package with a detachable lid,
• (8) folding over said first end of the tubular body by means of a folding over plug thereby completing the manufacture of the lid,
• (9) turning the body over and filling it with product to be packaged, and
• (10) closing the second end of the tubular body.