GB271444A - Improvements in or relating to apparatus for drawing sheet glass - Google Patents

Abstract

271,444. Hermann, H. May 20, 1926, [Convention date]. Drawing. - Relates to drawing-apparatus of the kind in which the glass is drawn vertically upwards in a flat sheet by pairs of opposed rollers, and consists in providing means for enabling the rollers to adjust themselves to variations in the thickness of the sheet and to any warping or twisting of the sheet which may occur. In the construction shown in Fig. 5, a sheet B is drawn vertically upwards from a pot W by means of pairs of rollers a arranged vertically above one another. Each roller a may be divided into a number of annular sections a<1>, and the whole of the sections are driven by an internal driving-shaft b, Fig 1, on which they rest. The weight of the sections forces them into contact with those of the associated roller, but the arrangement enables the sections to move apart and adapt themselves to irregularities in the thickness of the sheet B which is gripped between the rollers. The rollers may be solid, and in this case they are so mounted that they can swing about the axes of the driving-shafts b, as shown in Fig. 2. They are held in contact with one another, and with the sheet B, by counterweights n or by springs. Each pair of rollers is mounted on a frame f, Figs. 5 and 6, carried by a wheeled truck g. The truck can be moved transversely to the plane of the sheet B and the frame f can be turned about a vertical axis, thus enabling the rollers to be kept in contact with the whole width of the sheet should it become warped. The pairs of rollers are driven by flexible or articulated shafts d, and the speed of the rollers is arranged to increase slightly from the lowest to the highest.