Method and apparatus for producing synthetic resin films
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
Dec 13, 1999
filing date -
Dec 14, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A film production process having a film tentering step and a recovering step, characterized by detecting the side edge positions of the film running toward the recovering step, transferring the film running direction based on the detected information, and controlling the clamp start position of the film arriving at a tenter in the tentering step by clamp means, in the transverse direction of the film. A film production process having a film tentering step, characterized by controlling the clamp start position of a film arriving at a tenter by clamp means, in the range from 5 mm to 1,000 mm from the tip of the film in the longitudinal direction of the film.
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