Paper making and fiber liberation – Processes and products – Pore forming in situ
Reexamination Certificate
2005-07-26
2005-07-26
Chin, Peter (Department: 1731)
Paper making and fiber liberation
Processes and products
Pore forming in situ
14
Reexamination Certificate
active
06921459
ABSTRACT:
The present invention relates to a method for forming a non-woven fibrous web comprised of aramid fibers and aramid fibrid which comprises forming a foam furnish by agitating the fibers and fibrid in a foamed medium, and passing the foam furnish onto a screen and defoaming the furnish. In effectively agitating the aramid fibers in the foamed medium, the agitating means is mounted for displacement within the foamed medium and includes 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 aramid fibers within the foamed medium.
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PCT Search Report from corresponding International Application No. PCT/US03/28375, issued Feb. 11, 2004.
Kinsley, Jr. Homan B.
Peart Christopher B.
Chin Peter
FiberMark, Inc.
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