Extrusion die membrane
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Mar 27, 2001
Grant Date -
N/A
app pub date -
Mar 17, 1998
filing date -
Mar 17, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flexible membrane is attached to a holder for controlling flow in an extrusion die. The membrane includes a horizontal portion, first and second curved portions adjacent the horizontal portion, first and second offset portions adjacent the first and second curved portions, and first and second edges adjacent the first and second offset portions. The membrane is formed of a single piece of material. The flow control device including the flexible membrane may be produced by fabricating a membrane holder from a material, fabricating a flexible membrane from the same material, joining the flexible membrane to the membrane holder, and hardening the membrane holder and membrane.
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