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Closure membrane and closure employing same

  • US 6,213,355 B1
  • Filed: 06/09/1999
  • Issued: 04/10/2001
  • Est. Priority Date: 05/30/1996
  • Status: Expired due to Term
First Claim
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1. Closure membrane (2) with a closure head (5) and a retaining border (3), the closure head (5) being connected to the retaining border (3) via a connecting wall (4), the entire arrangement being of essentially cup-shaped design and the closure head (5) preferably being of a thickness which increases outwards from the centre, characterised in that the connecting wall (4) is attached to the closure head (5) via a connecting web (51) which is of a lesser thickness than the connecting wall and the border region of the closure head (5), the connecting web having a thickness within the range 0.2 mm to 0.35 mm and in the rest position of the membrane projecting radially inwards from the connecting wall (4).

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