Method for controlling the position of a foil strip edges
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United States of America Patent
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Jun 28, 2005
Grant Date -
Dec 2, 2004
app pub date -
Sep 9, 2002
filing date -
Sep 12, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for controlling the edges (7, 7′) of a foil strip guided in a shaping funnel of a device producing tubular bodies from the foil strip by an overlapping weld seam using a guide wedge, the strip being then welded. According to the invention, after welding, the method consists in using a linear infrared sensor for measuring and evaluating a temperature profile perpendicular to the overlapping weld seam. In case of variation relative to the specific real profile, a signal is automatically transmitted to rotate the shaping funnel with the guide wedge, the welding being produced by the high frequency (HF) and the temperature profile being measured directly after welding.
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