C - Chemistry – Metallurgy – 03 – B
Patent
C - Chemistry, Metallurgy
03
B
49/7
C03B 23/023 (2006.01) C03B 23/025 (2006.01) C03B 27/044 (2006.01) C03B 35/14 (2006.01) C03B 35/24 (2006.01)
Patent
CA 1128755
Abstract of the Disclosure In the present invention a single shaping mold conforming to the outline and contour of the bent glass sheet is employed, onto which a heat-softened glass sheet is dropped to impart the bending force to the glass. Immediately after each glass sheet leaves a heating furnace, it is elevated by means of a flat vacuum platen which is brought into contact with the upper side of the glass sheet. When the vacuum platen and the glass sheet are raised to an elevated position, the shaping mold is conveyed into a position beneath the glass sheet, the vacuum is released, and the glass sheet drops onto the shaping mold to effect the bending. The shaping mold is then retracted from beneath the vacuum platen ant passed into a tempering station where blasts of air are directed onto the opposite surfaces of the glass sheet to temper the glass. This arrange- ment greatly simplifies change-over from one shape to another since the single bending mold is the only major element which muse be reconstructed. Another important feature of the present invention is that the arrangement may be readily adapted to bending and tempering a plurality of glass sheets simultaneously, thereby greatly increasing the productivity of the instal- lation..
339153
Gowling Lafleur Henderson Llp
Ppg Industries Inc.
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