Appeal No. 1997-1412 Page 4
Application 08/139,888
a main assist gas nozzle at a center portion of
the machining head for supplying a main assist gas;
and
at least one annular sub assist gas nozzle
surrounding the main assist gas nozzle, a jet outlet
at an innermost diameter of the annular sub assist
gas nozzle being no smaller than a jet outlet of the
main assist gas nozzle, for increasing pressure
fluctuation and flow fluctuation of the main assist
gas flow in comparison with the sub assist gas flow.
The references relied on in rejecting the claims follow:
Babel et al. 5,149,937 Sep. 22,
1992 (Babel)
Hisayoshi 2-263585 Oct. 26,
1990.
(Japanese Patent)
Claims 1, 6, 11, and 12 stand rejected under 35 U.S.C.
§ 102(b) as anticipated by Babel. Claim 1 stands rejected
under 35 U.S.C. § 102(b) as anticipated by Hisayoshi. Claims
6 and 23 stand rejected under 35 U.S.C. § 103 as obvious over
Hisayoshi in view of Babel (Hisayoshi-Babel). Rather than
repeat the arguments of the appellants or examiner in toto, we
refer the reader to the briefs and answers for the respective
details thereof.
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