An Assembly Comprising a Wide-Mouth Plastic Preform or Container having a Reinforced Neck Finish and a Screwable Closure

An assembly comprising plastic preform (P) or container (1) and a removable closure (2) that can be screwed onto the plastic preform or container, wherein said plastic preform (P) or container (1) comprises a hollow body (11) and a neck finish (10;

• 10′;
• 10″) terminated by a wide-mouth opening (100), said neck finish comprising a neck support ring (102) and a neck portion (101) extending between the wide-mouth opening (100) and the neck support ring (102), wherein the neck portion (101) is provided with a thread (12) for screwing the removable closure onto the neck portion (101), and comprises an upper portion (1010) and a reinforced lower portion (1011), wherein said upper portion (1010) is extending between said wide-mouth opening (100) and said reinforced lower portion (1011), wherein said reinforced lower portion (1011) is extending between said upper portion (1010) and said neck support ring (102), wherein the inner face (1011b ) of the reinforced lower portion (1011) is transitioning to the inner face (1010b) of the upper portion (1010) along a transition step (1011c) in such a way that said reinforced lower portion (1011) is thicker than the upper portion (1010) at least in a top part of the reinforced lower portion (1011), and wherein the removable closure (2) comprises a deformable sealing material (20) and once the removable closure is being screwed onto the neck finish of the preform (P) or container (1), the neck support ring (102) is below the removable closure (2) and the upper portion (1010) of the neck portion (101) is in contact with the deformable sealing material (20) and a seal is achieved only between this upper portion (1010) of the neck portion (101) and the removable closure (2).