Appeal 2006-2439
Application 09/986,446
BACKGROUND
Appellants’ invention relates to a device for filtering and adding a
grain refining material to metal melts. Claims 12 and 24, as presented in the
Brief, appear below:
12. A device for filtering and adding grain-refining materials to a metal
melt, said device having a flow direction for said melt, said device
comprising:
a first filter comprising a porous filter medium;
a grain refining material feed, said disposed downstream from said
first filter in said flow direction; and
a second filter, said second filter disposed downstream from said feed
in said flow direction,
wherein said second filter comprises a porous filter medium in the
form of a deep-bed filter,
wherein said first filter is configured to operate based on cake
filtration.
24: A method for filtering and adding a grain refining material to a metal
melt, said method comprising:
filtering said melt using a porous medium as a first filter;
adding said grain-refining material to said melt after said filtering said
melt using a porous medium; and
filtering said melt using a second filter after said adding,
wherein said second filter comprises a porous filter medium in the
form of a deep-bed filter,
wherein said first filter is configured to operate based on cake
filtration.
The Examiner relies on the following references in rejecting the
appealed subject matter:
Dore US 4,113,241 Sep, 12, 1978
Hunt US 4,790,870 Dec. 13, 1988
Gesing US 4,790,973 Dec. 13, 1988
Walker US 4,834,876 May 30, 1989
Takayuki (as translated) JP 07-207357 Aug. 08, 1995
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