Process for bend-shaping a glass plate and an apparatus for bend

Details Process for bend-shaping a glass plate and an apparatus for bend Process for bend-shaping a glass plate and an apparatus for bend

1993-03-22

2000-01-18

Silverman, Stanley S.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65 254, 651822, 65268, C03B 4002, C03B 1800, C03B 2300

Patent

active

06014873&

ABSTRACT:
A process for bend-shaping a glass plate by heating the glass plate to a softening temperature of the glass plate, while the glass plate is transferred along a transferring surface in a shaping furnace. The glass plate is transferred along a complex bending transferring surface having a complex curved face which is upwardly projected with predetermined radius of curvatures along both the axis of the transferring direction and the axis perpendicular to the transferring direction. The transferring surface having an upward gradient portion at at least an area near the exit of the shaping furnace, to thereby bend the glass plate into a shape which substantially corresponds to that of the complex bending transferring surface, and then, the glass plate being cooled and strengthened along a cooling transferring surface which has a complex curved face so as to be substantially continuous to that of the complex bending transferring surface and which has at least a downward gradient portion in at least a part of the cooling transferring surface.

REFERENCES:
patent: 3409422 (1968-11-01), Gulotta
patent: 3526491 (1970-09-01), Sharrock
patent: 3594149 (1971-07-01), Pickavance et al.
patent: 4292065 (1981-09-01), Nedeler et al.
patent: 5009695 (1991-04-01), Kuster et al.
patent: 5522912 (1996-06-01), Kobayashi et al.

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