Method and device for the mask welding of moving plastic films by lasers
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United States of America Patent
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Nov 20, 2007
Issued Date -
N/A
app pub date -
May 3, 2004
filing date -
May 22, 2003
priority date (Note) -
Expired
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Abstract
A method and device allows dynamic mask welding with online position adjustment in the high-speed welding of structured and endless plastic films. By a transparent driven mask roller provided with masks being arranged in a passive pressure roller surrounding the mask roller, detection can take place optically, and the mask roller and consequently the mask are synchronized with the film speed. Adjustment is detached from a film transport mechanism and does not influence the welding process and in this case, above all, the speed. High film transport speeds in the range of up to 1000 mm per second can be employed.
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