Appeal No. 1997-0144
Application No. 08/424,223
further discloses that the first or inner wrapping (12) is
preferably a high strength multi-filament aramid fiber (e.g.,
Kevlar), while the second or outer wrapping (14) is one having
low friction, light weight, a silk-like hand, that is fast
drying, resistant to light and low in cost, preferably, for
example, nylon or a polyester (e.g., Dacron). In column 2,
lines 56-62, Bettcher indicates that
[t]he core structure is designed to provide
cut resistance, knittability, flexibility and
add life to the yarn; and the windings retain
the core and create body. The Kevlar
wrapping increases the cut resistance, and
the outer wrapping of nylon which gives the
yarn an oily feel enhances the knittability
of the yarn and overcomes the abrasive effect
of the Kevlar wrapping.
In further describing the stainless steel wires (16, 18),
Bettcher notes that they each have a tensile strength of about
125,000 lb./sq. in., while the synthetic fiber (20) of the core
is relatively nonstretchable and of high strength, preferably
having a tensile strength of about 400,000 lb./sq. in. or higher
(col. 3, lines 1-9). The first wrapping (12), also formed of
Kevlar, is described as being of high strength and as preferably
being of about four hundred denier. It is noted that an outer
wrapping (14) of 200 to 630 denier can be used with satisfactory
results. At column 4, line 20, et seq., Bettcher expressly notes
4
Page: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Next
Last modified: November 3, 2007