Glass manufacturing – Molten glass dispensing means – Discharge orifice below melt level
Reexamination Certificate
1996-06-28
2001-03-13
Vincent, Sean (Department: 1731)
Glass manufacturing
Molten glass dispensing means
Discharge orifice below melt level
C065S126000, C065S333000
Reexamination Certificate
active
06199405
ABSTRACT:
The present invention relates to feeders for delivering vertical runners of molten glass to a shear mechanism which severs the runners into discrete gobs for distribution to a glass container forming machine such as an I.S. machine or an H-28 machine.
State of the art glass feeders are shown in U.S. Pat. Nos. 4,554,000 and 4,999,040. Such feeders have a spout bowl which has a cylindrical vertical outlet at the bottom. This cylindrical outlet is closed by a circular orifice plate which has one, two, three or four in-line holes through which the glass passes. Needles, corresponding in number and location to the holes in the orifice plate, are located within the cylindrical outlet and reciprocate vertically to form the runners as they are sheared into the gobs.
Heat loss while the molten glass passes through the cylindrical opening and as it sets on the orifice plate creates an uneven temperature distribution across the glass and this is undesirable.
It is an object of the present invention to provide a glass feeder which achieves a more uniform temperature across the molten glass.
REFERENCES:
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patent: 4305747 (1981-12-01), Kirkman et al.
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patent: 4581054 (1986-04-01), Mumford
patent: 4999040 (1991-03-01), Stankosky
patent: 2079266 (1980-07-01), None
Emhart Glass S.A.
Smith Spencer T.
Vincent Sean
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