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US 5,364,432 AGranted
Method for producing a composite glass body with drawing of concentric melts
AssigneeHeraeus Quarzglas GmbH & Co. KG
InventorHelmut Leber
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AssigneeHeraeus Quarzglas GmbH & Co. KG
InventorHelmut Leber
Estimating the term…
A method for producing an elongated composite glass body by melting at least two starting materials of different material compositions, feeding the starting materials to a drawing die disposed at the bottom of an externally heated melting crucible, and continuously drawing the melts vertically out of the drawing die to form a composite body laminated transverse to the drawing direction. To provide an interface free from impurities between the starting materials in the composite body and to enable the path of the interface to be freely shaped, the starting materials are fed in particle form continuously to a single melting crucible and heaped therein to form a preformed body in which one starting material lies directly next to the other starting material forming an interface line therebetween that extends substantially vertically and parallel to the drawing direction.
A method for producing a multilayered elongated composite glass body of at least two different materials laminated together along an interface that extends in the elongated direction of the body, said body being made from at least two starting materials of different glass compositions, comprising continuously feeding the starting materials in particle form to the top of the interior of a single, externally heated melting crucible to heap said starting materials in the crucible to form a preformed composite mass therein in which the starting material of one composition in the composite mass lies directly next to the starting material of another composition along an interface extending substantially vertically, heating the composite mass to form melts from each starting material, and continuously drawing the melts vertically out of a drawing die located at the bottom of the crucible to form said multilayered elongated composite glass body.
Dependencies are inferred from the claim text.