Abstract: The container is connected to a tube (1) defining an opening (2) of the container to the outside, the opening being able to be closed by a plug (3) suitable to be introduced by axial sliding into the tube (1). The plug (3) is associated with a plate (7) co-operating with axial locking means (8, 9) provided in the tube (1) and allowing the plate (7) to extend transversally in this in front of the plug (3) to prevent the removal of this when there is an over-pressure in the container. The axial locking means (8, 9) of the plate (7) include a first slot (8) in the wall of the tube (1) and a second slot (9) diametrically opposed to the first slot (8). The plate (7) is suitable to be introduced transversally into the tubular element (1) through the first slot (8) and to project outside the tubular element through the second slot (9).

Abstract: The container is connected to a tube (1) defining an opening (2) of the container to the outside, the opening being able to be closed by a plug (3) suitable to be introduced by axial sliding into the tube (1). The plug (3) is associated with a plate (7) co-operating with axial locking means (8, 9) provided in the tube (1) and allowing the plate (7) to extend transversally in this in front of the plug (3) to prevent the removal of this when there is an over-pressure in the container. The axial locking means (8, 9) of the plate (7) include a first slot (8) in the wall of the tube (1) and a second slot (9) diametrically opposed to the first slot (8). The plate (7) is suitable to be introduced transversally into the tubular element (1) through the first slot (8) and to project outside the tubular element through the second slot (9).

Abstract: A punching tool for forming elongated slots in a tubular wall comprises a punching end having a generally oblong cross section, said cross section comprising a central portion and two lateral portions. According to the invention, said central portion has a larger thickness than said lateral portions.