Flow barrier in the annealing section of a glass tempering appar

Details Flow barrier in the annealing section of a glass tempering appar Flow barrier in the annealing section of a glass tempering appar

1987-10-28

1988-08-30

Kellogg, Arthur

Glass manufacturing

Product cooling means

With preceding reheater

65118, 65119, 65348, C03B 2704

Patent

active

047674393

ABSTRACT:
The invention relates to a flow barrier in the annealing section of a glass tempering apparatus, said annealing section being provided with glass sheet supporting rollers (7) and cooling air blow boxes (1, 3) are disposed above and below a glass sheet, in addition to which there are, above the glass sheets, "false rolls" (8) in the form of a downward open trough, extending crosswise to the traveling direction of said glass sheets. The purpose of "false rolls" (8) is to increase a pressure applied to the top surface of a glass sheet in order to reduce the risk of a glass sheet becoming afloat. A flow along the trough, which increases towards the ends of the trough, results in a non-uniform tempering. The flow is cut off by fitting the trough with partitions (9) spaced from each other.

REFERENCES:
patent: 1841060 (1932-01-01), Russell
patent: 1955163 (1934-04-01), Adams
patent: 3223498 (1965-12-01), Davidson, Jr.
patent: 4236909 (1980-12-01), Thomas et al.

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