Method and apparatus for continuously co-extruding a sheet
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United States of America Patent
Stats
-
Aug 6, 1985
Grant Date -
N/A
app pub date -
Sep 19, 1983
filing date -
Sep 19, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method for continuously producing a sheet composed of a plurality of materials co-extruded in segments along the width of the sheet are provided. The extrusion die has a slit extending along the width of the die, the slit being divided into a plurality of adjacent sections along the length of the slit. The widths of each of the segments are variable and can be accurately controlled. Feeding means for feeding material to each of the separate adjacent sections is provided. The method and apparatus are effective to produce a thermoplastic sheet having two or more layers in a central portion of the sheet and only a single layer at the edge portions of the sheet.
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- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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