Method of machining preformed plastic film by separation and/or ablation
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United States of America Patent
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-
Mar 4, 2003
Grant Date -
N/A
app pub date -
May 26, 2000
filing date -
Dec 16, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a method of producing plastic film having a predefinable outline and/or even or uneven thickness, by machining preformed plastic film for separation and/or ablation. The method is used especially for producing flexible flaps for artificial heart valves. To produce a film having local variations in thickness and smooth edges where the piece of film has been cut, the invention provides for the plastic film to be separated and/or for specific areas to be ablated to the desired thickness by means of a laser beam.
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Cited Art Landscape
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