Glass manufacturing – Processes – Forming product or preform from molten glass
Patent
1996-12-16
1998-04-28
Czaja, Donald E.
Glass manufacturing
Processes
Forming product or preform from molten glass
65 84, 65 86, 65183, 425 721, 4253781, 425380, C03B 1700
Patent
active
057439281
ABSTRACT:
An apparatus (10) for extruding glass tubing (12) which comprises a furnace (14). A component (16) within the furnace (14) is for holding molten glass (18). A duplex mandrel (20) on one end of the furnace (14) is connected into the holding component (16). A facility (22) is for forcing the molten glass (18) in the holding component (16) out through the duplex mandrel (20), so as to form the glass tubing (12) having an upper support segment (24) and a lower structural segment (26). An assembly (28) is for quick cooling the upper support segment (24) of the glass tubing (12) upon exiting the duplex mandrel (20), so that the lower structural segment (26) will maintain its desired shape while slow cooling.
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Czaja Donald E.
Kroll Michael I.
Vincent Sean
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