Multilayer coextrusion die and method
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United States of America Patent
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-
Jan 4, 2005
Grant Date -
Jun 19, 2003
app pub date -
Dec 19, 2001
filing date -
Dec 19, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention is an extrusion device comprising an interleaving block portion. The interleaving block portion includes at least two first chambers, each first chamber including a width, a length, a height, and an input aperture. The length dimension of the first chambers are generally parallel. An output aperture is included in each first chamber, the output aperture is wider and shorter in height than the input aperture. A series of first distances are defined between the input aperture to points along the output aperture. A die portion is included in the extrusion device. The die portion has a laminate chamber having a height dimension. The height dimension of the laminate is disposed generally perpendicular to the length dimension of the first chambers. An output is disposed at one end of the height dimension. The laminate chamber is disposed so as to be in communication with the output apertures of the parallel first chambers.
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