Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1975-06-02
1976-05-11
Lindsay, Jr., Robert L.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 2, 65 28, 65171, 65172, C03B 3702
Patent
active
039559513
ABSTRACT:
Continuous inorganic fibers such as glass fibers are made by drawing molten material from orifices in the bottom of a refractory bushing. Occasionally during operation one or more tips will become clogged by unmelted particles in the molten material. These clogged tips will no longer produce a continuous fiber, but instead drip causing defects and breakouts which must be corrected. In the past, several methods have been tried to plug off these clogged tips, but none have been successful. The present invention involves a method of plugging a clogged tip while the bushing is at an elevated temperature using a small refractory plug. The present invention permits the bushing to be operated for its normal life thus producing a significant improvement in operating costs.
REFERENCES:
patent: 2996758 (1961-08-01), McFadden
patent: 3350182 (1967-10-01), Hunter et al.
patent: 3551234 (1970-12-01), Britton
patent: 3607164 (1971-09-01), Thom et al.
Harris Walter William
Pickard David Jon
Johns-Manville Corporation
Kelly Joseph J.
Krone Robert M.
Lindsay, Jr. Robert L.
Miller John H.
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