Capacitance sensor for measuring thickness of blown film including a collapsing frame and a pair of linear motor assemblies
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United States of America Patent
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Apr 27, 1993
Grant Date -
N/A
app pub date -
Aug 1, 1991
filing date -
Aug 1, 1991
priority date (Note) -
Expired
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Abstract
A sensor system for measuring the thickness of blown film, by mounting a linear motor system on either side of a collapsing frame to permit the linear travel of a forcer element substantially across the width of the collapsing frame. A sensor is affixed to the forcer element and is positioned in close contact with blown film surface, to provide a plurality of measurement samples of thickness during the traversal of the linear motor across the blown film surface.
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