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Additive delivery system closure

  • US 7,588,142 B1
  • Filed: 11/18/2005
  • Issued: 09/15/2009
  • Est. Priority Date: 11/18/2005
  • Status: Expired due to Fees
First Claim
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1. A multi-piece additive delivery closure system, comprising:

  • an overcap having a top wall and annular depending side wall;

    a second annular side wall coaxial to and interiorly of said overcap side wall;

    an annular center bore wall spaced interiorly of said second annular side wall;

    a cup shaped button insert removably retained within a container neck and having a button seal surrounding a lower aperture, said button seal in sealing contact with said annular center bore wall;

    wherein said second annular side wall defines a dosing chamber.

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