Process and apparatus for making a sheet of refractory fibers using a foamed medium
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United States of America Patent
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Sep 9, 2003
Grant Date -
N/A
app pub date -
Apr 10, 2002
filing date -
Apr 10, 2002
priority date (Note) -
Expired
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Abstract
The present invention relates to a method for forming a non-woven fibrous web comprised of refractory fibers which comprises forming a foam furnish by agitating the fibers in a foamed medium, and passing the foam furnish onto a screen and defoaming the furnish. The present invention employs a unique apparatus for effectively agitating the refractory fibers in the foamed medium, the agitating means being mounted for displacement within the foamed medium and including a convex leading surface facing in the direction of displacement. The leading surface includes upper and lower portions converging in the direction of displacement to form a generally convex leading surface and driving means for displacing the agitating means in the direction of displacement for dispersing and mutually separating the metal fibers within the foamed medium.
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