Producing glass sheets of required curved shape

Details Producing glass sheets of required curved shape Producing glass sheets of required curved shape

1979-12-10

1981-08-11

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65104, 65273, 65287, 65290, C03B 2303

Patent

active

042832160

ABSTRACT:
A glass sheet is suspended from a series of tongs which grip the upper margin of the sheet and apply individual forces at the gripping locations at least some of which have components acting out of the plane of the sheet. The magnitude and direction of each of said forces is selected to ensure that the suspended sheet, when at forming temperature, adapts towards a predetermined curved shape. The sheet may be bent with the forces acting at the gripping points before and/or after bending, and the sheet adopts the required curved shape when it is sufficiently stiffened to be influenced by the remanent forces applied at the gripping points.

REFERENCES:
patent: 2250628 (1941-07-01), Forbes
patent: 3454298 (1969-07-01), Bognar
patent: 3846110 (1974-11-01), Burns
patent: 3854920 (1974-12-01), Kay et al.
patent: 3951634 (1976-04-01), Hall et al.

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