Glass manufacturing – Processes of manufacturing fibers – filaments – or preforms – With measuring – controlling – sensing – programming – timing,...
Patent
1994-06-28
1997-04-08
Hoffmann, John
Glass manufacturing
Processes of manufacturing fibers, filaments, or preforms
With measuring, controlling, sensing, programming, timing,...
6537415, 65 251, 65388, 65404, 65407, 385123, C03B 1900
Patent
active
056183259
ABSTRACT:
Method of manufacturing a multi-component glass cylindrical part comprising the operations of providing a vertical cylindrical cavity lined with porous membranes whose inside dimensions are very slightly larger than those of the glass cylindrical part and in which can slide a cylindrical pedestal, providing a seed mass of the glass on the pedestal, heating the seed mass until it melts, injecting a gas continuously into the porous membranes to form and maintain a layer of gas between the porous membranes and the molten seed mass preventing any contact between the molten seed mass and the porous membranes, feeding the molten seed mass from the top of the cavity by continuously dispensing a powder made up of the components of the glass, varying the composition of the powder as the cylindrical part is formed, so that the glass cylindrical part has a composition that varies in the longitudinal direction, and lowering the pedestal as the cylindrical part is formed.
REFERENCES:
patent: 3966446 (1976-06-01), Miller
patent: 4017288 (1977-04-01), French et al.
patent: 4212660 (1980-07-01), Maurer
patent: 4227771 (1990-10-01), Nolan
patent: 4229067 (1980-10-01), Love
patent: 4617041 (1986-10-01), Meerman
patent: 5185020 (1993-02-01), Satoh
patent: 5350433 (1994-09-01), Baniel
Alcatel Fibres Optiques
Hoffmann John
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