Device for producing blown films
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United States of America Patent
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Apr 30, 2013
Grant Date -
Apr 29, 2010
app pub date -
Jun 25, 2008
filing date -
Jun 28, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
A device for producing blown films, including an extrusion device generating a tubular film and a flattening device, associated with the tubular film, having two flattening elements, arranged on diametrically opposite zones of the tubular film and adjustable in relation to each other at an acute angle, for transforming a cross-section of the tubular film, which is first circular, then oval, to a double-layer film web. This invention has lateral guide elements for the areas of the tubular film that are not affected by the flattening elements and are arranged between the flattening elements and are associated with the tubular film and the lateral guide elements have an adjustable contour.
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