Fabric (woven – knitted – or nonwoven textile or cloth – etc.) – Nonwoven fabric – Including strand or fiber material which is of specific...
Reexamination Certificate
2006-07-31
2010-10-05
Torres-Velazquez, Norca L (Department: 1786)
Fabric (woven, knitted, or nonwoven textile or cloth, etc.)
Nonwoven fabric
Including strand or fiber material which is of specific...
C442S350000, C442S351000, C442S400000, C442S401000, C442S409000
Reexamination Certificate
active
07807591
ABSTRACT:
A nonwoven fibrous web comprising a matrix of continuous meltspun fibers bonded to a coherent self-sustaining form, and separately prepared microfibers dispersed among the meltspun fibers. The microfibers may have median diameters less than one or two micrometers. A method for preparing such a nonwoven fibrous web comprises establishing a stream of continuous oriented meltspun fibers having a longitudinal axis, establishing a stream of meltblown microfibers that exit a meltblowing die at a point near the stream of meltspun fibers, the meltblown stream being aimed to merge with the meltspun stream and having a longitudinal axis that forms an angle of between 0 and 90 degrees to the longitudinal axis of the meltspun stream, capturing the meltblown fibers in the stream of meltspun fibers, and collecting the merged stream as a web on a collector spaced near the intersection point of the meltspun and meltblown streams.
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Pending U.S. Appl. No. 11/457,899, filed Jul. 17, 2006.
Fox Andrew R.
Lindquist Timothy J.
Stelter John D.
3M Innovative Properties Company
Baker James A.
Tamte Roger R.
Torres-Velazquez Norca L
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