Glass manufacturing – Processes – Reshaping or surface deformation of glass preform
Patent
1979-03-09
1980-11-11
Kellogg, Arthur D.
Glass manufacturing
Processes
Reshaping or surface deformation of glass preform
65104, C03B 2302
Patent
active
042330505
ABSTRACT:
This invention covers shaping glass sheets to complicated shape by first preliminarily shaping said sheets to a prebent shape while supported on an outline mold, then completing the shape while cradling the prebent sheets within a thin flexible blanket of fiber glass cloth during final shaping by blow forming. This invention also covers a technique of cradling glass sheets in a flexible fiber glass blanket that is wrapped over the margin of the glass sheets to be shaped by blow forming. The margin of the blanket is reversely wrapped over a frame-like ring that prevents the marginal edge from curling and maintains the cradle in tension against the lower major surface of the glass sheet during shaping by blow forming.
REFERENCES:
patent: 637899 (1899-11-01), Sievert
patent: 3459521 (1969-08-01), Nedelec
patent: 3473909 (1969-10-01), Bennett et al.
patent: 3484225 (1969-12-01), Bognar
patent: 3600150 (1971-08-01), Rougeux
Black Edward D.
Comperatore John A.
Wise David J.
Kellogg Arthur D.
Mates Edward I.
Millman Dennis G.
PPG Industries Inc.
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