Stopper made of foamed, thermoplastic synthetic material
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United States of America Patent
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N/A
Issued Date -
Nov 17, 2005
app pub date -
Mar 7, 2005
filing date -
Jul 17, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention refers to a method for the production of a plug from foamed thermoplastic with a cork brand, by means of a laser beam. The invention is characterized in that the focus point of the used laser beam lies in a plane different from the surface of the plug. The basic idea is that to avoid damage to the thin plastic film, the energy needed for the color change of the pigments is applied, in low density for such a purpose, over a large period of time.
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