Appeal No. 1997-1380
Application 08/301,508
appellants and the examiner with regard to the merits of these
rejections.3
Helinski, the examiner’s primary reference, discloses a
CAD-controlled apparatus and method for the layer-by-layer
production of a three-dimensional article. As described by
Helinski,
[p]ractice of the invention requires two jetting
heads, one supplied with material that will form the
fabricating particles, and the other with material
that will form the support particles. Numerous
alternatives to this scheme are also possible. For
example, a single jetting head incorporating two
feeder lines may be used. In a different
configuration, a first linear array of fabricating-
particle jets and a second linear
array of support-particle jets may be employed. The
single-jet scheme offers compactness and economy, while
the array scheme permits deposition of a layer in a
shorter time.
. . .
The jetting head or heads 10 are connected by
means of suitable electronic and mechanical linkages
to one or more servo mechanisms 12, which are
responsive to commands issued by a controller 14.
3In light of the amendment made to claim 13 subsequent to
final rejection (see n.2), the examiner has withdrawn the 35
U.S.C. § 112, second paragraph, rejection of claims 13 through
15, 17 and 18 which was set forth in the final rejection (see
the advisory action mailed October 11, 1995, Paper No. 7).
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