Glass manufacturing – Glassworking or preform by or with reheating means – Planar sheet preform
Patent
1980-02-05
1981-08-04
Kellogg, Arthur D.
Glass manufacturing
Glassworking or preform by or with reheating means
Planar sheet preform
65104, 65107, 65268, C03B 23025
Patent
active
042820260
ABSTRACT:
Sheet glass is heated during conveyance on a conveyor within a furnace. A vacuum holder is positioned within the furnace housing above the conveyor and has a downwardly facing surface with spaced openings in which a vacuum is drawn to receive a glass sheet from the conveyor and support the sheet above the conveyor. The holder surface is disclosed as being both planar and curved and as having a porous cover of ceramic fibers so as to distribute the vacuum and prevent marring of the glass as it is supported. Auxiliary lifters positioned between the rolls or vertical movement of the vacuum holder facilitates glass pickup. A carrier mold ring moves under the supported glass and the vacuum is then terminated so the glass drops onto the ring and bends under the bias of gravity in a manner that allows thin glass to be accurately bent. Subsequently the mold ring is moved from the furnace to a quench unit that temper the bent glass.
REFERENCES:
patent: 3723085 (1973-03-01), McMaster
patent: 3778244 (1973-12-01), Nedelec et al.
patent: 4092141 (1978-05-01), Frank
patent: 4202681 (1980-05-01), McMaster et al.
patent: 4204854 (1980-05-01), McMaster et al.
McMaster Harold A.
Nitschke John S.
Nitschke Norman C.
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