Appeal No. 1999-2812 Page 13
Application No. 08/724,049
providing a 4-bar linkage including first and second
bar means extending generally parallel to each other,
each of said first and second bars having a pair of ends,
and third and fourth bars,
connecting said first and second bars adjacent the
ends thereof with said third and fourth bars, to provide
at least one degree of pivotal freedom of said third and
fourth bars relative to said first and second bars,
rotatably mounting a disc blade on each of said
third and fourth bar means with each of said third and
fourth bars being equipped with means for rotating said
disc blades,
rotating said first bar about a first axis to orbit
said blades with the orbit of said blades intersecting
said linear path and with the centers of said disc blades
being at least 30" (750 mm) apart while skewing said
first axis at a minor acute angle to said linear path,
and
rotating said second bar about a second axis
different from said first axis to compensate for said
skewing and to orient said disc blades perpendicular to
said web plies in said linear path when severing said web
plies.
After considering the combined teachings of the applied
prior art (i.e., Spencer and Molins), we reach the conclusion
that it would not have been obvious at the time the invention
was made to a person having ordinary skill in the art to have
arrived at the claimed invention. Specifically, it is our
opinion that the combined teachings of the applied prior art
would not have suggested rotating the second bar about a
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