Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – With measuring – controlling – sensing – programming – timing,...
Patent
1998-04-09
1999-08-24
Chin, Peter
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
With measuring, controlling, sensing, programming, timing,...
65388, 65392, 65485, 65486, 65491, 65533, 65537, C03B 3707
Patent
active
059420197
ABSTRACT:
A furnace body for a glass preform elongating apparatus which makes an elongated body by passing the glass preform through the furnace body and elongating the glass preform while heating the glass preform, the furnace body comprising a furnace core tube shaped like a cylinder through which the glass preform passes and having so adequate length in an axial direction that the elongated body may not bend or distort its form, a heating member disposed at an outer peripheral portion of the furnace core tube, a thermal insulator enveloping the furnace core tube and the heating member from outside in circumferential and axial directions thereof, and a furnace body outer shell holding the thermal insulator therein, wherein a through hole is disposed near the heating member downstream thereof in an advancing direction of the glass preform so as to penetrate through the furnace core tube, thermal insulator, and furnace body outer shell in the direction orthogonal to the furnace core tube.
REFERENCES:
patent: 3865564 (1975-02-01), Jaeger et al.
patent: 4331463 (1982-05-01), Briere et al.
patent: 5316562 (1994-05-01), Smithgall et al.
patent: 5545246 (1996-08-01), Lysson et al.
patent: 5676725 (1997-10-01), Ito et al.
patent: 5755849 (1998-05-01), Hoshino et al.
Moriya Tomomi
Saito Tatsuhiko
Chin Peter
Colaianni Michael P.
Sumitomo Electric Industries Ltd.
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