Closure having band with internal thread formed by impression

A closure for mating with a container having a finish that includes a thread thereon, the closure comprising a body and a deformable element, the body comprising:

• a flange;
• a skirt depending downwardly from a periphery of the flange;
• and
• at least one passage extending from an exterior surface of the body to an interior surface of the body and at least partly through the skirt;
• the deformable element being disposed on an interior surface of the skirt, the deformable element having at least one branch disposed within the at least one passage,
• whereby the deformable element is formed by injecting material through the at least one passage.

A method for closing a package, comprising the steps of:

• providing a container having a finish with threads disposed thereon, the threads having an outer diameter;
• providing a closure comprising a flange, skirt depending downwardly from a periphery of the flange and including a protrusion extending from an interior surface of the skirt, and a deformable element disposed on an the interior surface of the skirt below the protrusion and spaced apart from the flange, the deformable element having an inner diameter that is smaller than the outer diameter of the finish threads, the skirt comprising a first material and the deformable element comprising a second material;
• and
• urging the closure onto the container finish such that the deformable element is deformed by the container thread to impress closure threads in the deformable element, such that the skirt protrusion restricts deformable element movement axially towards the flange during the urging step, and such that the deformable element remains spaced apart from the flange.