GB246057A - Improvements in drawing and flattening sheet glass - Google Patents

Abstract

246,057. Tennant, W. J., (Empire Machine Co.). Aug. 21, 1925. Drawing. - In order to flatten sheet glass made by a continuous drawing process, it is drawn vertically upwards from a mass of molten glass and is deflected through a small angle, the draw then being continued in a vertical plane. In the construction shown in Fig. 1, the sheet 3 is drawn vertically upwards from a mass of glass 1, and after passing between edgegripping rolls 6, it is deflected through a small angle 7. It then passes over a roller 8 and continues upwards in a vertical plane into a lehr. The roller 8 flattens the sheet but it may be provided with a pattern to produce figured glass. In a modification, a flattening-roller 10, Fig. 3, is arranged above the edge rolls 6, and the sheet is deflected over this roller to a second flattening. roller 12 whence it proceeds in a vertical plane. Other rollers may be used to press the sheet against the rollers 10, 12. The edge rolls may be dispensed with, and the deflecting or flattening rollers may be reduced in diameter at their ends to permit the passage of the thickened edges of the sheet. In another modification, the flattening-roller may be replaced by stub rolls. Skew rolls co-operate with the stub rolls and exert a lateral stretching-action on the sheet. In a further modification, the edges of the sheet are gripped by endless chains 27, 28, Fig. 14, which cause the sheet to travel in the desired direction. The frames 25 by which each set of chains is carried are mounted on adjusting-screws so that they can be tilted to exert a lateral stretching-action on the sheet.