Appeal No. 2000-1302 Page 5
Application No. 08/766,057
have been obvious to one skilled in the art at the time of
appellant’s invention to replace the components of vandalized
bus seats of the admitted prior art with an integrally molded
unit comprising wood having an elastomer skinned urethane foam
adhered thereto to
provide a bus seat with improved resistance to skin tearing
(answer, page 5) in comparison to the cast skin-covered seat
cushions of the admitted prior art in view of the teachings of
Hoskinson (see column 1, lines 5-15).
Hoskinson discloses a process for making such an
integrally molded unit comprising the steps of forming the
skin by casting a thermoplastic elastomeric polymer (column 1,
lines 66-67) to a mold using either slush-molding or rotary-
casting techniques to form a first layer 8 of the skin within
the mold, charging a liquid mixture of a liquid resin and
asbestos fines into the mold to fuse to the layer 8 and form a
second layer 7 of the skin 6, inserting a wood bottom in the
mold, adding sufficient polyurethane foamable mixture to fill
the mold when foaming is complete and allowing the foamable
mixture to foam.
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