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Pilferproof closure with mechanical interlock

  • US 4,344,545 A
  • Filed: 04/13/1981
  • Issued: 08/17/1982
  • Est. Priority Date: 04/13/1981
  • Status: Expired due to Term
First Claim
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1. A closure for a container having a wall member with an aperture, said closure comprising a sleeve member having a seal-tight fit within said aperture and having a bore providing a pour opening, a flexible plastic plug having a seal-tight fit within said opening, a lift lever connected to said plug, a combination pour lip and fulcrum projecting from one of said members for fulcruming engagement by said lever and lifting the plug out of the pour opening, a tearable anti-pilfer means on said lever, and limited-movement-permitting means connecting said anti-pilfer means to said plug, said anti-pilfer means being torn away from said lever upon lifting of said lift lever beyond the permitted limited movement.

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