TRANSVERSE STRETCHING DEVICE
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United States of America Patent
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N/A
Issued Date -
Jul 2, 2009
app pub date -
Mar 27, 2007
filing date -
Mar 28, 2006
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A transverse stretching device comprises two stretching wheels and endless bands arranged against them and revolving around band guide rolls so that a plastic film to be stretched is arranged at its both edges between a stretching wheel and a band. The stretching wheels and the bands are arranged in such a way that in the direction of travel of the plastic film they are further apart from each other at the end than in the beginning, whereby the transverse stretching device stretches the plastic film in the transverse direction. The stretching wheels are rims open in the center and the device includes heating means arranged through the rims at least at some angle between the stretching wheels.
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