Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – With purifying or homogenizing molten glass
Reexamination Certificate
2007-03-27
2007-03-27
Hoffmann, John (Department: 1731)
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
With purifying or homogenizing molten glass
C065S475000, C065S495000, C065S493000
Reexamination Certificate
active
10421683
ABSTRACT:
A bushing for fiberizing molten material, such as molten glass, having a screen mounted in the bushing spaced above the tip or orifice plate with a central portion of the screen having a significantly lower percent of hole area than the percent of hole area in end portions of the screen. This bushing improves fiberizing efficiency in channel positions of a fiberizing operation. Also, such a screen can be laid on top of a conventional screen to convert a normal bushing to a channel position bushing. Methods of using these types of bushings to improve fiberization in the channel positions and for modifying conventional bushings for other uses are also disclosed.
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Hoffmann John
Johns Manville
Touslee Robert D.
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