Glass manufacturing – Processes – Reshaping or surface deformation of glass preform
Patent
1987-01-05
1988-05-03
Kellogg, Arthur
Glass manufacturing
Processes
Reshaping or surface deformation of glass preform
65104, 65273, 65290, 65291, C03B 2303
Patent
active
047417510
ABSTRACT:
An extended surface pressing mold for a horizontal press bending arrangement. The lower mold provides a glass sheet engaging surface having a first portion which complements and generally parallels a first portion of an upper sheet engaging surface of an aligned upper mold, a wing portion which extends from the first portion of lower mold and is nonparallel to a corresponding second aligned portion of the sheet engaging surface of the upper mold, and a ring portion positioned outwardly from the wing portion and generally complementing a third aligned portion of the upper sheet engaging surface of the upper mold near a portion of the perimeter of the glass sheet. The ring portion moves from the first position wherein the ring portion is in a non-engaging position relative to the heat softened glass sheet to a second position wherein the ring portion contacts and engages a perimeter portion of the heat softened glass sheet to press the perimeter portion against the third portion of the upper mold.
REFERENCES:
patent: 3682613 (1972-08-01), Johnson et al.
patent: 4229200 (1980-10-01), Seymour
patent: 4305746 (1981-12-01), Hagedorn et al.
patent: 4496386 (1985-01-01), Hymore et al.
patent: 4501603 (1985-02-01), Frank et al.
patent: 4508556 (1985-04-01), Bennett et al.
patent: 4579577 (1986-04-01), Claassen
Claassen George R.
Karlo Rudolph A.
Posney Richard V.
Kellogg Arthur
PPG Industries Inc.
Siminerio Andrew C.
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