Apparatus for holding a hollow cylinder of silicon dioxide soot

Details Apparatus for holding a hollow cylinder of silicon dioxide soot Apparatus for holding a hollow cylinder of silicon dioxide soot

1997-03-18

1998-04-14

Czaja, Donald E.

Glass manufacturing

Fiber making apparatus

65529, 65144, C03B 0000, C03B 1906, F27B 126, F27B 128

Patent

active

057387028

ABSTRACT:
A hollow cylinder is held in a vertical orientation and sent continuously through a heating zone for sintering. In a first phase of the sintering operation, the hollow cylinder stands on a support while the upper end (12) of the cylinder is being sintered. In a second phase the cylinder hangs from a hanging element while its lower end (10) is sintered. A vertical rod is fixed to the base on which the lower end is supported, and extends through the hollow cylinder. A retaining ring is fixed inside the upper end of the hollow cylinder. During the first phase, the upper end vitrifies and contracts so that the retaining ring engages the vertical rod. Longitudinal contraction causes the lower end to lift off the base so that the cylinder is suspended during the second phase.

REFERENCES:
patent: 5076824 (1991-12-01), Miller
patent: 5665132 (1997-09-01), Ruppert et al.

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