Closure device for closed receptacles of plastic film
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United States of America Patent
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Jul 20, 2010
Grant Date -
Mar 22, 2007
app pub date -
Dec 27, 2005
filing date -
Sep 16, 2005
priority date (Note) -
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Abstract
A closure device attachable above a location of a closed receptacle, comprising a stopper portion with a cylindrical pour-out spout connected or connectable to the receptacle, and a screw cap screwed onto the lower part, and a cylindrical piercing element that in the axial direction is open at both sides and is displaceably mounted in the lower part, wherein catch portions move the piercing element helically downwards when screwing off the cap for the first time, wherein the piercing element is equipped with at least one cutting element.
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