Shaping glass sheets by drop forming with sag control means

Details Shaping glass sheets by drop forming with sag control means Shaping glass sheets by drop forming with sag control means

1979-06-01

1980-10-14

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65104, 65107, 65268, 65273, C03B 2302

Patent

active

042279089

ABSTRACT:
Spacer elements affixed to the face of a flat vacuum platen induce a temporary reverse bow in a heat softened glass sheet held on the platen. The bowing is in the opposite direction from that of the final curvature, so that when the glass sheet is subsequently dropped onto a shaping mold the resulting sag in at least one direction is reduced.

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patent: 3973943 (1976-08-01), Seymour
patent: 4092141 (1978-05-01), Frank et al.

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