Apparatus and method for attenuating mineral fibers
Abstract
Abstract An improved apparatus for attenuating mineral fibers from a liquid melt. The apparatus includes a furnace block having an interior trough for the liquid melt which extends through the lower surface thereof. A removable bushing support is clamped to the lower surface of the furnace block with an interior flared opening leading downwardly from the trough to a plurality of bushing orifices in its lower surface. Adjacent the interface between the furnace block and the bushing support and along the sides of the passage through the block are cooling pipes which are filled with cooling liquid when the bushings and their support structure are to be removed for repair or replacement. The cooling liquid in the pipes is effective to locally freeze off and solidify the melt in the passage across the interface to permit bushing support structure removal out thermal disturbance of the remainder of the installation.
Inventors
- 👤 M Mitcham
- 👤 R Pregnall
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |