Glass manufacturing – Glassworking or preform by or with reheating means – Planar sheet preform
Patent
1978-10-25
1980-09-09
Kellogg, Arthur D.
Glass manufacturing
Glassworking or preform by or with reheating means
Planar sheet preform
65287, 65349, C03B 2302
Patent
active
042215803
ABSTRACT:
This invention relates to improvements in handling glass sheets during shaping. Each glass sheet in turn is heated to its deformation temperature and conveyed into a glass shaping station. The glass is lifted into engagement with an upper vacuum shaping mold while hot and held against the vacuum shaping mold by vacuum as the glass lifting mechanism retracts downward. A transfer and tempering ring-like member having an outline supporting surface conforming to and slightly inside the periphery of the bent glass sheet is brought into a position below the upper vacuum shaping mold. The vacuum on the upper mold is released to deposit the shaped glass sheet on the ring-like member. In case the outline of the glass sheet is irregular, the shaped glass may become tilted as it falls toward the ring-like member and be deposited in a misaligned position relative to said ring-like member. The present invention provides means for the upper vacuum shaping mold that reduces the tendency of glass sheets of irregular outline to tilt during their transfer to the ring-like member with minimum expenditure of power to insure a non-tilting transfer.
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patent: 3846106 (1974-11-01), Seymour
patent: 4092141 (1978-05-01), Frank et al.
Kellogg Arthur D.
Mates Edward I.
Millman Dennis G.
PPG Industries Inc.
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