Overflow downdraw glass forming method and apparatus

Glass manufacturing – Processes – With measuring – sensing – inspecting – indicating – or testing

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C065S053000, C065S158000, C065S162000, C065S193000, C065S195000

Reexamination Certificate

active

06990834

ABSTRACT:
The present invention alters the flow path at the inlet of the sheet glass forming apparatus to improve quality. The bottom of the downcomer pipe is preferably shaped to alter the character of the vortex flow in the quiescent flow zone between the pipes. In another embodiment, a bead guide provides hydraulic stresses that are in opposition to the surface tension stress and thus reduces the influence of surface tension on the formation of thick beads on the edges of the sheet. The present invention also measures the temperature of the glass by immersing thermocouples in the glass, at locations where any defects caused by the immersion are in the glass that forms the unusable edges of the sheet. In another embodiment, the support structure for the trough is altered to substantially reduce the aging of the trough due to thermal creep.

REFERENCES:
patent: 1673907 (1928-06-01), Ferngren
patent: 1697227 (1929-01-01), Danner
patent: 1731260 (1929-10-01), Nobbe
patent: 1759229 (1930-05-01), Drake
patent: 1829639 (1931-10-01), Ferngren
patent: 1829641 (1931-10-01), Ferngren
patent: 1841579 (1932-01-01), Fraser
patent: 1891370 (1932-12-01), Danner
patent: 3149949 (1964-09-01), Dockerty et al.
patent: 3338696 (1967-08-01), Dockerty
patent: 3433613 (1969-03-01), Dockerty
patent: 3437470 (1969-04-01), Overman
patent: 3451798 (1969-06-01), Simon
patent: 3506429 (1970-04-01), Overman
patent: 3519411 (1970-07-01), Cortright et al.
patent: 3589887 (1971-06-01), Ward
patent: 3607182 (1971-09-01), Leibowitz
patent: 3682609 (1972-08-01), Dockerty
patent: 3723082 (1973-03-01), Knowles et al.
patent: 4214886 (1980-07-01), Shay et al.
patent: 4389725 (1983-06-01), Barkhau et al.
patent: 4416678 (1983-11-01), Bottger
patent: 4738706 (1988-04-01), Picinelli
patent: 5374595 (1994-12-01), Dumbaugh, Jr. et al.
patent: 6319867 (2001-11-01), Chacon et al.
patent: 2003/0110804 (2003-06-01), Fenn et al.
patent: 2003/0192349 (2003-10-01), Meda et al.
patent: 1596484 (1967-07-01), None
patent: 1596402 (1967-12-01), None
patent: 1596403 (1967-12-01), None
patent: 21 58 253 (1971-11-01), None
patent: 31 11484 (1983-02-01), None
patent: 33 16795 (1983-11-01), None
patent: 31 11484 (1983-12-01), None
patent: 33 14540 (1983-12-01), None
patent: 3329843 (1984-05-01), None
patent: 3507852 (1985-08-01), None
patent: 3518137 (1986-01-01), None
patent: 43 36 046 (1993-10-01), None
patent: 43 26 143 (1993-12-01), None
patent: 196 44 673 (1998-04-01), None
patent: 198 09 878 (1999-09-01), None
patent: 198 40 113 (2000-03-01), None
patent: 19964043 (2001-07-01), None
patent: 100 21 013 (2001-11-01), None
patent: 100 28 741 (2001-12-01), None
patent: 1549081 (1967-12-01), None
patent: 1549915 (1968-01-01), None
patent: 982153 (1965-02-01), None
patent: 09110443 (1997-04-01), None
patent: 10291827 (1998-11-01), None
patent: 11-246230 (1999-09-01), None
patent: 2001-80922 (1999-09-01), None
Varshneya, Arun, “Fundamentals of Inorganic Glasses”, Academic Press, Inc., 1994, pp. 534-540.
Snyder, R.D./Byars, E.F., “Engineering Mechanics”, McGraw-Hill Book Company, 1973, pp. 349-350.
Kingery, W.D.; Bowen, H.K.; Uhlmann, D.R., “Introduction to Ceramics”, John Wiley & Sons, 1976, pp. 705-767.
Bottger, et al.; “LCD substrate—the future process” International Glass Review, Issue Feb. 2000; 3 pages.
Bocko, Peter L. and Mitchell, Mark H. “AMLCD Glass Substrates—Foundation for High-Tech Displays” The GlassReseacher, vol. 12, No. 1, pp. 26-29, 2002.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Overflow downdraw glass forming method and apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Overflow downdraw glass forming method and apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Overflow downdraw glass forming method and apparatus will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3570759

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.