Glass manufacturing – Processes – Reshaping or surface deformation of glass preform
Patent
1977-06-03
1978-10-10
Kellogg, Arthur D.
Glass manufacturing
Processes
Reshaping or surface deformation of glass preform
65 24, 65286, 65287, C03B 2302
Patent
active
041194241
ABSTRACT:
A method and apparatus for shaping glass sheets by gravity sagging using a pair of oblique slides to support an opposite pair of edges of a flat glass sheet, which is supported on said slides in shaping relation over an outline shaping mold and heated until it sags to conform to the upward facing shaping surface of the mold disposed between and below said slides. The gist of the present invention is to selectively apply cooling fluid against the glass sheet adjacent one of the opposite glass sheet side edges whenever the opposite side edge begins to slide and sag an observable amount more than the adjacent side edge. The selective application is discontinued when both of the glass sheet edges are in approximate horizontal alignment with one another. If necessary, this process is repeated throughout the gravity sagging operation, thereby ensuring that the glass sheet comes to rest on the peripheral shaping surface of the outline mold in proper alignment therewith.
REFERENCES:
patent: 2377849 (1945-06-01), Binkert et al.
patent: 3560182 (1971-02-01), Golightly
patent: 3607186 (1971-09-01), Bognar
Kellogg Arthur D.
Mates Edward I.
Millman Dennis G.
PPG Industries Inc.
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