Appeal 2007-1168
Application 10/211,407
3. The first embodiment comprises two layers, a first fibrous layer with
an average fiber diameter between about 10.0 and about 30.0 microns and a
second layer of meltblown polypropylene fiber having a thickness of
between about 0.0127 and about 0.254 cm and fiber diameters between
about 10.0 and 30.0 μm. (Claim 1; Specification at 3.)
4. In preferred embodiments, the first fibrous layer has a thickness of
about 0.5 to about 8.0 cm. (Claim 2; Specification at 3.)
5. In a second embodiment, the fibrous blanket comprises three layers,
the meltblown polypropylene fiber layer being sandwiched between two
fibrous layers of the first kind. (Claims 10, 11; Specification at 3-4.)
6. Generally, according to the specification:
[t]he first fibrous layer 12 may incorporate multicomponent
fibers, powder resin or other chemicals to promote bonding.
Alternatively, bonding may be achieved by mechanical means
such as needling. The two layers 12, 14 are then joined
together by heating sufficiently to cause the two layers to bond
together along their interface and/or by application of a spray
adhesive such as a spray hot melt known to be useful in binding
fibers of the type utilized in the layers 12, 14 of the invention.
(Specification at 8; emphasis added to the labels to elements shown in the
Figures.)
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