Shaping glass sheets by drop forming with improved sag control

Details Shaping glass sheets by drop forming with improved sag control Shaping glass sheets by drop forming with improved sag control

1980-03-07

1981-11-17

Kellogg, Arthur D.

Glass manufacturing

Processes

Reshaping or surface deformation of glass preform

65104, 65273, 65287, 65291, C03B 23025

Patent

active

043009352

ABSTRACT:
When glass sheets are shaped by drop forming a glass sheet released from vacuum engagement against the bottom perforated plate of a vacuum platen to drop onto a shaping mold of ring-like construction, the intermediate portion of the glass sheet can develop excessive downward sag. The present invention discloses different techniques to develop an upward bow in the intermediate portion of the glass sheet sufficient to compensate approximately for the undesired excessive downward sag.

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