Appeal No. 1997-0068
Application 07/923,278
Reference is made to the appellants’ main and reply
briefs (Paper Nos. 16 and 19) and to the examiner’s answer
(Paper No. 17) for the respective positions of the appellants
and the examiner with regard to the merits of these
rejections.
Pomerantz discloses a CAD-controlled system for the
layer-by-layer production of a three-dimensional physical
model made of radiation polymerizable resin. The system 500,
which is illustrated schematically in Figure 22, includes a
mask producing subsystem 502 and a physical model producing
subsystem 504. Subsystem 502 produces mask-bearing substrates
514 corresponding to respective layers of the physical model.
As described by Pomerantz,
[i]n the physical model producing subsystem 504,
the mask bearing substrate is precisely positioned
in operative engagement with an exposure unit 530 .
. . .
The three dimensional model is built up layer by
layer on a model support surface 534 which can be
selectably positioned along the X and Z axes by suitable
conventional positioning apparatus 536. Initially the
model support surface 534 is located in operative
engagement with and under a resin applicator 540 . . . .
Applicator 540 . . . is operative to provide a
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