Appeal No. 1999-0422 Page 7
Application No. 08/628,805
insertion of the fins into the grooves, pressure deformed
portions (17) are formed by the application of pressure by a
pressure blade (74) to firmly fix each fin (14) to the wall
surface of a groove.
Hess discloses a heat emitting unit comprising a main
body (2) and long, thin, flat extruded ribs (3,4) provided
with foot profiles (9) for insertion into grooves (16,17) in
the main body. The lateral surfaces of the ribs are provided
with "structures 8 in order to achieve an enlargement of the
[heat transfer] surfaces" (column 5, lines 25-27). The
channels (16,17) have undercut configurations and cross-
sections which match but are slightly larger than the foot
profiles (9) of the ribs (column 5, lines 39-40). The ribs
are inserted into the channels from the side and are secured
from falling out in other directions by the undercut
configuration of the channels. Keyways (19) are provided
between and parallel to the channels for receipt of a chisel
(20) for pressing and deforming the lateral areas of the
channels as indicated by arrows in Figure 3 to secure the foot
profiles in the channels and ensure a good heat transfer
junction.
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Last modified: November 3, 2007