Appeal No. 1997-0144
Application No. 08/424,223
stainless steel or a high strength multifilament yarn (col. 3,
lines 23-27). The composite yarn may comprise a high strength
synthetic yarn as the core yarn overlaid with knitted stainless
steel, a core yarn of nylon overlaid with knitted stainless
steel, or may comprise a core of stainless steel filament
overlaid with a knitted high strength synthetic multi-filament
yarn (col. 2, lines 12-19). At column 3, lines 27-34, Robins
notes that
[t]he preferable embodiment thus far developed uses a
non-metallic yarn as the core yarn 11, for example, an
840 denier nylon multifilament yarn, with a .0045 inch
stainless steel strand as the knitted cover yarn 12
which is applied over the core yarn 11. However, other
embodiments of core yarn 11 could comprise any type of
high strength synthetic fiber material.
In describing the embodiment seen in Figure 4, Robins again
emphasizes (col. 3, lines 35-46) that the composite yarn utilizes
a single multifilament core yarn (21), preferably a high strength
multifilament, onto which is knitted a stainless steel covering
yarn (22). Over the knitted covering yarn (22) is wrapped, by a
conventional spiral wrapping process, a pair of yarns (23) and
(24) which may comprise a multifilament yarn having good
flexibility and knitting characteristics, such as nylon or
polyester. In claim 1 of the Robins patent, the invention is
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