C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/33
C03B 13/02 (2006.01)
Patent
CA 1124524
METHOD AND APPARATUS FOR SHAPING GLASS SHEETS BY ROLL FORMING Abstract of the Disclosure This invention relates to shaping glass sheets by roll forming to either simple or complex curvatures about a single axis of bending or to compound curvatures comprising components of curvature about mutually perpendicular axes of bending by a controlled, repeatable program of roll forming without causing the glass sheets to stop their forward movement during their shaping. The apparatus used to perform this process has a minimum of moving parts, thus minimizing maintenance problems and reducing down time for maintenance and repair. In a variation of this invention, shaped solid members such as successive rotating shaping rolls of predetermined contour of a first configuration engage a heat-softened glass sheet to impart a preliminary curvature different from the final curvature to be imparted to the glass followed by imparting a final curvature significantly different from the first configuration by cooling the opposite glass sheet surfaces at sig- nificantly different cooling rates during the imposition of a temper thereto.
368329
Johnson Randall S.
Wolfe Terry L.
Gowling Lafleur Henderson Llp
Ppg Industries Inc.
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