Appeal No. 2006-0934
Application No. 10/327,852
a first pair of heat transfer members between which said first gap portion is
located are water-tightly seam-welded together at the flat portions thereof on the side
where said
second opening is placed, is combined with a second pair of heat transfer members
between which said first gap portion is located are water-tightly seam-welded together
at the flat portions
thereof on the side where said second opening is placed, and then said first pair of heat
transfer members and said second pair of heat transfer members are water-tightly
welded together at the
flat portions thereof on a side where said first opening is placed, into a united body;
each of said first gap portions serves as a passage for a fluid having a higher
pressure, of said first and second heat exchange fluids; and
said end plate is provided on each of opposite surfaces thereof with at least one
recess, which is formed along said fitting hole and has a predetermined depth, said at
least one
recess serving as a welding groove for a welding operation.
THE PRIOR ART
The references relied on by the examiner as evidence of
obviousness are:
Cotter 4,183,402 Jan. 15, 1980
Tran 5,228,515 Jul. 20, 1993
THE REJECTION
Claims 1-3 and 10-12 stand rejected under 35 U.S.C. § 103(a) as being
unpatentable over Cotter in view of Tran.
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