Screen for fiberizing bushings and method

Details Screen for fiberizing bushings and method Screen for fiberizing bushings and method

2007-03-27

2007-03-27

Hoffmann, John (Department: 1731)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With bushing flood prevention, removal, or breakout prevention

C065S474000, C065S475000, C065S495000, C065S481000, C065S540000

Reexamination Certificate

active

08929836

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.

REFERENCES:
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patent: 3556753 (1971-01-01), Glaser
patent: 3765852 (1973-10-01), Shule
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patent: 4330312 (1982-05-01), Hill
patent: 4612027 (1986-09-01), Marra
patent: 4624693 (1986-11-01), Marra
patent: 4664688 (1987-05-01), Grubka
patent: 5709727 (1998-01-01), Bobbs
patent: 722860 (1980-03-01), None

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