Isopipe design feature to reduce sag

Details Isopipe design feature to reduce sag Isopipe design feature to reduce sag

2011-06-14

2011-06-14

Lazorcik, Jason L. (Department: 1741)

Glass manufacturing

Means drawing sheet from bath

Means dividing and recombining melt in draw chamber

C065S053000, C065S090000, C065S193000

Reexamination Certificate

active

07958748

ABSTRACT:
Disclosed is an isopipe for use in the manufacture of sheet glass by, and more specifically to an isopipe designed to control sag during use, as well as a method for reducing the sag of an isopipe used in a fusion process for molten glass. In one embodiment, the isopipe comprises a cavity that extends at least partially through the refractory body of the isopipe along its longitudinal length. The cavity has varying cross-sections configured such that, for at least a portion of the length of the isopipe, the load bending moment is greater than or generally equal to the gravity bending moment. In one embodiment, the neutral axis varies along the length of the cavity and has a similar profile to that of the gravity bending moment diagram.

REFERENCES:
patent: 1739960 (1929-12-01), Ferngren
patent: 1759229 (1930-05-01), Drake
patent: 1829641 (1931-10-01), Ferngren
patent: 1841579 (1932-01-01), Fraser
patent: 3149949 (1964-09-01), Dockerty et al.
patent: 3437470 (1969-04-01), Overman
patent: 4214886 (1980-07-01), Shay et al.
patent: 6974786 (2005-12-01), Helfinstine et al.
patent: 6997017 (2006-02-01), Pitbladdo
patent: 7690221 (2010-04-01), Pitbladdo
patent: 2003/0192349 (2003-10-01), Meda et al.
patent: 2005/0130830 (2005-06-01), Ames et al.
patent: 2006/0016219 (2006-01-01), Pitbladdo
patent: 2008/0202165 (2008-08-01), Hoysan et al.
patent: 11246230 (1999-09-01), None
Peter L. Bocko, Mark H. Mitchell CGR NSF Industry—University Center for Glass Research,AMLCD Glass Substrates—Foundation for High-Tech Displays.

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