Sheet or film oblique stretching method and sheet or film clipping stretcher
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United States of America Patent
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Sep 17, 2013
Grant Date -
Oct 22, 2009
app pub date -
Jul 17, 2007
filing date -
Jul 19, 2006
priority date (Note) -
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Abstract
Clipping both right and left side edge parts of a sheet or film by right and left pitch-variable clips having flow-directional clip pitches variable along with travel movements, respectively, having positions (AR, AL) for initiation of enlargements of flow-directional clip pitches changed between right clips and left clips, and enlarging flow-directional clip pitches along with travel movements of clips to thereby make an oblique stretch.
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