Method and apparatus for bending and tempering glass sheets
Abstract
Abstract AN OUTLINE SHAPING SURFACE IS SUPPORTED IN AN OBLIQUE PLANE BY A CARRIAGE. THE OUTLINE SHAING SURACE HAS AN UPPER SHAPING RAIL HAVING AT LEAST ONE NOTCH IN IT. A PAIR OF TONGS SUSPENDED FROM THE CARRIAGE HANGS FREELY WITHIN THE NOTCH. A GLASS SHEET IS PARTIALLY SUPPORTED BY THE TONGS NEAR ITS UPPER EDGE, AND THE LOWER EDGE OF THE GLASS ENGAGES THE LOWER PORTION OF THE OUTLINE MOLD TO SUPPORT THE GLASS IN A SECOND OBLIQUE PLANE. DURING HEATING, THE GLASS SAGS BY GRAVITY TOWARD THE OUTLINE MOLD AND INCREASES ITS CONTACT WITH THE MOLD. THEN THE GLASS IS PRESSED BETWEEN A PAIR OF COMPLEMENTARY SHAPING MEMBERS HAVING SHAPING SURFACE CONFORMING TO THAT OF THE OUTLINE MOLD WHILE THE GLASS IS CLOSELY ADJACENT TO THE MOLD. THE SHAPING MEMBERS HAVE A NOTCHED UPPER EDGE IN ALIGNMENT WITH THE NOTCHES IN THE OUTLINE MOLD. THE MEMBERS ARE RETRACTED AND THE GLASS SHEET, WHILE SUPPORTED ON THE OUTLINE SHAPING SURFACE, IS TEMPERED.
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