Film-tape-closure device slot cast integrated interlocking structure and extrusion method
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United States of America Patent
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Jan 31, 1984
Grant Date -
N/A
app pub date -
May 14, 1982
filing date -
May 14, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method and apparatus for extruding a film, a tape and a closure device simultaneously to produce integrated interlocking closure stock comprising (a) extruding a sheet of film onto a rotating casting roll at a rate to provide a high draw-down ratio; (b) extruding a tape to join the film on the casting roll at a rate to provide a medium draw-down ratio; and (c) extruding a closure device onto the tape as it approaches the casting roll at a rate to provide a small draw-down ratio.
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