Take-off apparatus for formed tubular plastic film
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United States of America Patent
Stats
-
Jun 2, 1981
Grant Date -
N/A
app pub date -
Aug 16, 1979
filing date -
Aug 16, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improvement in plastic film formation devices which utilizes a unique cutting and take-off assembly. Flattening, cutting, and paired turning rod assembly move about the axis of the extruded tubular section of plastic in such a manner so as to continuously slice a helical section from the tubular extrusion. The mechanical arrangement of the flattening, cutting, and paired turning rod assembly provides for changing the pitch of the helix cut by changing the position of said assembly relative to the draw rollers. This arrangement results in a simplified overall mechanical device which can randomize thickness variations across the width of sheets formed and also determine the width of said sheets. It also provides for more control of cooling air required to cool the extruded tube.
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- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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