Appeal No. 1996-1878
Application No. 07/982,203
This is an appeal from the final rejection of claims 11-
30, all the claims remaining in the present application.
Claim 11 is illustrative:
11. The method of bonding a sole to a shoe upper comprising
the steps of providing on attaching surfaces of one or
both of said sole and said shoe upper a layer of heat-
softened adhesive composition comprising a moisture-
curable polyurethane NCO-terminated prepolymer formed
from about 20%/wt to about 65%/wt of a polyester polyol
having a molecular weight of from about 1,500 to about
6,000, from about 10%/wt to about 70%/wt of a
polypropylene glycol having a molecular weight of from
about 250 to about 1,000, and from about 15%/wt to about
35%/wt of a diisocyanate, all weights being based on the
weight of said composition, pressing the attaching
surfaces of said sole and said shoe upper together with
said adhesive composition between them, and cooling said
adhesive composition to form an adhesive bond between
said sole and said shoe upper.
The examiner relies upon the following references as
evidence of obviousness:
König et al. (König) 4,756,785 Jul. 12, 1988
Rumon et al. (Rumon) 5,166,300 Nov. 24, 1992
Gilch et al. (Gilch) 2,137,638 Oct. 10, 1984
(U.K. patent application)
Appellant's claimed invention is directed to a method of
bonding a sole to a shoe upper employing a hot-melt adhesive
formed from a polyester polyol, polypropylene glycol and a
diisocyanate. The method comprises providing on the attaching
surfaces of one or both of the sole and shoe upper a layer of
the heat-softened adhesive, pressing the attaching surfaces of
the sole and shoe upper together, and cooling the adhesive
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