Appeal 2007-0074
Application 10/758,381
gas flow to form a deposition mixture flow, and projects the deposition
mixture flow therefrom, wherein the deposition gun is provided with a
flowing coolant;
measuring a flow rate of the fuel to the deposition gun, a flow rate of
the oxidizer to the deposition gun, a flow rate of the powder to the
deposition gun, and a cooling capacity of the coolant flow; and
set-point controlling the flow rate of the fuel, the flow rate of the
oxidizer, the flow rate of the powder, and the cooling capacity of the coolant
flow, all responsive to the step of measuring.
The Examiner relies upon the following references as evidence of
obviousness:
Nakagawa US 5,958,522 A Sep. 28, 1999
Moore US 2003/0161946 A1 Aug. 28, 2003
R. Knight, HVOF Sprayed 80/20 NiCr Coatings – Process Influence Trends,
Thermal Spray: International Advances in Coatings Technology, 159-64
(1992).
Appellants’ claimed invention is directed to a method for forming a
deposit on a substrate using a deposition gun, such as a high-velocity
oxyfuel deposition gun. Appellants acknowledge that such a deposition gun
was known in the art at the time of filing the present application. To wit,
Appellants state that “[t]he basic structure and operation of such a deposition
gun 32 has been known” (Br. 3, ¶ 3). Appellants explain that identifying the
governing process parameters in the coating method “is the biggest
challenge, because there are many, many parameters that can be measured,
2
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