Appeal No. 98-2735
Application No. 90004386
pair of branch launders 11B are Joined [sic, joined]
to each other by a horizontal portion 11C, above
which the downstream end of the main launder 11A is
located. The selecting assembly comprises a pair of
closing devices 40 disposed at the upstream ends of
the branch launders 11B, respectively. Each of the
closing device 40 includes a closing plate 41 made
of the same material as the melt and disposed
vertically so as to close the fluid passageway in
the branch launder 11B, a lifting device (not shown)
connected to the closing plate 41 at its upper end
through a hook 42 and a rope, a supply tube 43a
connected to the closing plate 41 for supplying a
coolant into the closing plate 41, and a discharge
tube 43b connected to the closing plate 41 for
discharging the coolant from the closing plate 41.
As best shown in FIG. 14, the closing plate 41,
which is smiliar in configuration to the cross-
section of the branch launder passageway, is formed
slightly smaller than the cross-section of the
branch launder 11B, and is provided with a fluid
passageway 41a formed meanderingly therethrough and
having opposite ends 41b and 41c opening to the top
of the closing plate 41. The supply and discharge
tubes 43a and 43b are sealably and. . . .
. . . , the above blister copper launders 11A
and 11B are all provided with covers, heat
conserving devices such as burners and/or facilities
for regulating the ambient atmosphere are provided
thereon, whereby the melt flowing down through these
launders is kept at high 30 temperature in a
hermetically sealed state.
. . . , each branch launder 11B for flowing the
blister copper melt is inserted through the side
plate of the hood 31 in such a manner that an end
11C of the launder 11B is located above the flue
opening 30. The hood 31 as well as the end 11C of
the launder 11B are provided with watercooling
Jackets J, respectively.
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