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Liner piercing twist closure

  • US 20090050648A1
  • Filed: 08/24/2007
  • Published: 02/26/2009
  • Est. Priority Date: 08/24/2007
  • Status: Active Grant
First Claim
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1. A dispensing closure for a container that has an opening to the container interior where a fluent substance may be stored, and wherein a membrane is interposed between the container and dispensing closure, said dispensing closure comprising:

  • (A) a base for extending from said container at said container opening, said base defining (1) a receiving passage through said base, and (2) an annular sealing flange that (a) is located axially outwardly of at least part of the length of said receiving passage, and (b) extends radially inwardly from a peripheral portion of said receiving passage to define an opening into said receiving passage;

    (B) a movable spout that (1) is at least partly disposed in said base receiving passage, (2) has a dispensing passage extending through said spout, (3) has a grippable discharge end that (a) is located at an axially outward end of said spout, and (b) projects axially outwardly from said base, (4) has a peripheral sealing surface that is sealingly engaged by said base annular sealing flange, and (5) has a piercing element at an axially inward end of said spout;

    (C) a cam track located in one of said base and spout axially inwardly of said annular sealing flange; and

    (D) a cam follower that is (1) located on the other one of said base and spout, and (2) engaged in said cam track whereby said spout grippable discharge end can be grasped to rotate said spout for moving said spout axially from an axially outward, non-piercing location to an axially inward, piercing location.

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