Heating apparatus for drawing glass rod

Details Heating apparatus for drawing glass rod Heating apparatus for drawing glass rod

1987-07-28

1988-06-14

Lindsay, Robert L.

Glass manufacturing

Processes

With shaping of particulate material and subsequent fusing...

65 2, 277237A, C03B 37027

Patent

active

047509279

ABSTRACT:
A heating apparatus for drawing a glass rod having a tapered portion coupled, at its upper end, with a feed bar of an outside diameter smaller than that of the glass rod, including an apparatus housing into which the glass rod is inserted, a first sealing cover which is formed with a bore having such a dimension as to seal a clearance between the glass rod and the bore and is hermetically mounted on an inlet opening of the apparatus housing and a second sealing cover which is movably attached to the feed bar and is formed with an aperture having such a dimension as to seal a clearance between the feed bar and the aperture. The second sealing cover has a hollow portion which is formed with a space for accommodating the tapered portion and is hermetically placed, at its lower end, on the inlet opening.

REFERENCES:
patent: 2495956 (1950-01-01), Cook
patent: 4126436 (1978-11-01), Bailey
patent: 4154592 (1979-05-01), Bailey
patent: 4174842 (1979-11-01), Partus
patent: 4209176 (1980-06-01), Soodak et al.
patent: 4289318 (1981-09-01), Cather et al.
patent: 4309201 (1982-01-01), Klop et al.
patent: 4383843 (1983-05-01), Lyengar
patent: 4477274 (1984-10-01), Janssen et al.

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