Appeal No. 96-3501
Application No. 08/172,773
placing said heat shield against the interior surface of
a mold, said heat shield having an insulating layer contacting
said interior mold surface and a polyolefin foam pad having a
heat fusible surface;
extruding a hot pliable parison within said mold;
inflating said parison and causing said parison to
contact said heat fusible surface of said pad; and
raising and lowering the pressure within said parison
wherein said parison and said fusible surface of said pad
intermingle and fuse.
As evidence of obviousness, the examiner relies on the
following references:
Giese et al. (Giese) 4,617,077 Oct. 14,
1986
Ufer et al. (Ufer) 4,830,810 May 16,
1989
Ohashi et al. (Ohashi) Kokai 59-81221 May 10, 1984
The appealed claims stand rejected under 35 U.S.C. § 103
as unpatentable over Ohashi in view of Ufer or Giese.
The subject matter on appeal is directed to a method of
integrally molding a plastic fuel tank with a heat shield
having, inter alia, a polyolefin foam pad having a heat
fusible surface. In appellant’s method, the heat shield is
placed within the interior of an open blow-molding tool
wherein a plastic parison is extruded and inflated to cause
the parison to contact the heat fusible surface of the
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