Appeal No. 95-4866
Application 08/179,770
laterally to form mold cavities therebetween (page 2, figure).
Fluid flows in closed circulation through the walls (see id.).
The examiner argues that it would have been obvious to
one of ordinary skill in the art to modify Willingham by
providing a plenum between two fixed mold walls, as indicated
by Hummelshoj, in order to simultaneously mold two planar
concrete panels with a single heating means, thereby
increasing productivity, and to provide a return duct for the
heat exchange medium, as disclosed in either Rossetti or
SOMECAL, to use residual heat and thereby provide a more
economical apparatus (answer, page 5).
The examiner does not explain, and we do not
independently find, where Hummelshoj discloses simultaneously
molding two planar concrete panels with a single heating
means. In Hummelshoj’s Fig. 2, each concrete panel is heated
by two heaters, one on each side of the panel.
The examiner asserts that “plural molds formed by two
movable mold walls cooperating with a fixed mold member
located between the movable mold walls is well known in the
concrete casting art as shown by the applied prior art”
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