Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2005-02-22
2005-02-22
Dixon, Merrick (Department: 1774)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S179000, C428S220000, C428S137000, C428S172000, C428S364000, C428S332000, C428S359000, C156S167000, C264S518000, C264S517000
Reexamination Certificate
active
06858297
ABSTRACT:
Nonwoven webs having substantially aligned fibers can be formed in an apparatus having a direction of motion corresponding to the direction of web formation. The web is formed in the presence of at least one secondary fluid stream that oscillates the filaments or resulting attenuated fibers to and fro generally in and against the direction of motion so that a majority of the collected fibers are aligned within ±20° of the direction of motion and fibers having lengths of about 1-10 cm can be teased from the web. The resulting nonwoven webs are especially useful for forming pleated filtration media having pleats generally transverse to the direction of motion.
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Brandner John M.
Shah Rahul
Sundet Douglas C.
Wu Tien T.
3M Innovative Properties Company
Cleveland David R.
Dixon Merrick
Hanson Karl G.
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