Method and apparatus for controlling flow in a drum
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United States of America Patent
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N/A
Issued Date -
Jun 13, 2002
app pub date -
Dec 8, 2000
filing date -
Dec 10, 1999
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of manufacturing a non-woven material uses a contoured honeycomb drum with an outer microporous surface, more particularly with a contoured outer surface, for the manufacture of contoured non-woven fibrous materials. The method can use spunbonded, melt blown, or electro-static spun techniques for depositing solidifying filaments on the microporous surface such that the non-woven material conforms to the contour of the drum. The drum facilitates continuous production of non-woven articles with three-dimensional shapes such as surgical masks or pleated air filters. Airflow through the drum can be controlled with an internal adjustable manifold with independent valves to obtain non-woven material articles of various configurations and properties. In addition, efficiency can be improved by including turning vanes. Vacuum or pressure can be applied.
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