Device for producing lay-flat tubes in blown film extrusion installation
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United States of America Patent
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-
Mar 25, 2008
Grant Date -
May 26, 2005
app pub date -
Nov 12, 2004
filing date -
Nov 13, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A lay-flat device of a blown film extrusion installation includes brush rollers in the upper half entirely or partly. The brush rollers include bristles which are directed obliquely outwards and which, on contact with an extruded film tube, exert a slight spreading force on the film, by which folding is avoided.
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