Plastic film stretching apparatus
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United States of America Patent
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Apr 12, 2016
Grant Date -
Dec 19, 2013
app pub date -
Apr 25, 2013
filing date -
Apr 24, 2008
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Abstract
A plastic film is drawn by a method different from a conventional one. The plastic film is intermittently fed in the longitudinal direction. A drawing member and a support base are installed in a plastic film feeding path, oppositely to each other, on both sides of the plastic film in the thickness direction. When the plastic film is temporarily stopped, the drawing member advances toward the support base between the lateral both side edges of the plastic film and is pressed against the plastic film and the support base to draw the plastic film in the longitudinal direction. Then, the drawing member retreats from the support base, and is separated from the plastic film.
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