Appeal No. 2002-2201 Page 4
Application No. 09/699,539
USPQ 785, 787-788 (Fed. Cir. 1984). Accordingly, we will not
sustain the examiner’s rejection.
The examiner has determined that Barkhau discloses an
apparatus with associated orifices for forming a cased glass
stream from core and skin (casing) glass sources. The examiner
acknowledges that Barkhau does not disclose a spout, spout tube
for controlling casing glass delivery, and a gas source at
continuous elevated pressure coupled to the interior volume of
the spout tube, as here claimed. According to the examiner,
however:
[i]t would have been obvious to a person of ordinary
skill in the art at the time the invention was made to
add the flow orifice and tubular member of McCauley to
the apparatus of Barkhau et al because McCauley teaches
that the tubular member would have been helpful for
controlling the flow of glass through the flow orifice.
The glass feeder of McCauley, to which the examiner refers,
is constructed for transferring glass from an extension (2, FIG.
1) of a tank or furnace (1, FIG. 1) containing molten glass (14,
FIG. 1). The extension has a discharge orifice (upper edge 15 of
nozzle 16, FIG. 1) located at a height that is above the level of
the molten glass in the tank or furnace and a tubular member (19,
FIG. 1) associated therewith. In order to discharge molten
glass, McCauley employs a suction pump connected to a pipe (36,
Page: Previous 1 2 3 4 5 6 7 Next
Last modified: November 3, 2007