Glass manufacturing – Glassworking or preform by or with reheating means – Planar sheet preform
Patent
1983-09-15
1985-07-02
Kellogg, Arthur
Glass manufacturing
Glassworking or preform by or with reheating means
Planar sheet preform
65104, 65106, 65287, C03B 23035
Patent
active
045266050
ABSTRACT:
In apparatus for shaping sheets of heat-softenable material, such as glass and plastics, an upper vacuum mold is provided with an apertured wall member of low expansion refractory material to engage a heat-softened sheet during a portion of its shaping. In order to improve its durability, metal clamping devices that cause high local stresses in the refractory wall member are not used to secure the refractory wall member to metal structural elements of the vacuum mold. The present invention comprises novel mold structure to support a lower apertured wall member of refractory material on an inverted metal box member without metal attachment devices that induce high local stresses.
REFERENCES:
patent: 3607187 (1971-09-01), McMaster
patent: 3607200 (1971-09-01), McMaster
patent: 3634059 (1972-01-01), Miller
patent: 3728098 (1973-04-01), Giffen
patent: 4204853 (1980-05-01), Seymour
patent: 4260408 (1981-04-01), Reese et al.
patent: 4282026 (1981-08-01), McMaster et al.
patent: 4285715 (1981-08-01), Frank
Ewing John J.
Fecik Michael T.
Frank Robert G.
Kellogg Arthur
Mates Edward I.
PPG Industries Inc.
Siminerio Andrew C.
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