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Closure for a retort processed container having a peelable seal

  • US 20030116524A1
  • Filed: 12/21/2001
  • Published: 06/26/2003
  • Est. Priority Date: 12/21/2001
  • Status: Active Grant
First Claim
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1. A closure for maintaining pressure against a seal affixed to a container lip as a sealed container is exposed to relatively high temperature and pressure conditions, said closure comprising:

  • a. a cap, having a top with an interior surface and a skirt depending from the top and defining a skirt interior surface, and having at least one thread affixed to the interior skirt surface in a spiral; and

    b. a liner, proportioned to fit firmly within said cap and abutting the top interior surface thereof, said liner defining a resting thickness at ambient temperature and pressure conditions, and said liner being made from a material capable of being compressed to a thickness less than the resting thickness and being capable of recovering to a recovery thickness sufficient to allow said liner to maintain a positive pressure against said cap and against said seal when said closure is affixed to said container.

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