Appeal No. 2002-2201 Page 2
Application No. 09/699,539
BACKGROUND
Appellants’ invention relates to an apparatus for forming a
cased glass stream that is used in glassware manufacture. An
understanding of the invention can be derived from a reading of
claim 17, which is reproduced below.
17. Apparatus for forming a cased glass stream having
an inner core glass surrounded by an outer casing glass,
said apparatus including:
a core glass source for delivering core glass through a
first orifice,
a housing forming a second orifice vertically spaced
beneath and aligned with said first orifice with a chamber
surrounding said second orifice and communicating with said
second orifice through a gap between said first and second
orifice,
a casing glass source for delivering casing glass to
said chamber, such that glass flows by gravity from said
sources through said orifices to form said cased glass
stream,
said casing glass source including a spout having an
outlet opening, and
a source of gas at continuous elevated pressure coupled
to said interior volume of said tube, and through said tube
to said opening, continuously maintaining said interior
volume of said tube at a pressure above ambient pressure
surrounding said spout.
The prior art references of record relied upon by the
examiner in rejecting the appealed claims are:
Barkhau et al. (Barkhau) 4,740,401 Apr. 26, 1988
McCauley 114,583 Apr. 11, 1918
(Great Britain patent specification)
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