| 摘要 |
<p><PICT:1110764/C1/1> A method of snapping an advancing sheet of glass having a score line extending parallel to the direction of advance of the sheet comprises applying to opposite faces of the sheet uniformly curved bending members of complementary from, which members extend across the sheet and each comprise a plurality of contacting elements to impose on the sheet a curvature sufficient to snap the sheet along any score line parallel to the axis of curvature but insufficient to break any unscored area of the sheet. A glass sheet 4 having longitudinal score lines 5 is advanced on to a snapping apparatus, a snapping cycle commencing when the leading edge of the sheet strikes a sensing element 8. The apparatus comprises a lower bending member or frame of convex cylindrical form, a complementary overhead frame of cylindrical form associated with the lower frame and actuating means operable to raise the lower <PICT:1110764/C1/2> frame thereby to press a scored sheet and snap same. The lower frame includes a number of horizontal bars 10 mounted for vertical movement in slots 16, 17 and each carrying a plurality of rollers 12 so mounted that their upper surfaces lie on the cnvex arc of a cicle. The upper frame comprises a plurality of overhead beams 30 from each of which depends a series of rollers 34 arranged so that their lower surfaces lie on a concave arc of a circle matching the lower rollers. A glass conveyed on to the frame is pressed between the frames by a piston cylinder 28-29 operating through levers 21-24 to lift the lower frame and the scored sheet into engagement with the upper frame upon a signal from device 8. The lower frame may be replaced by a series of belts 35-38 which are caused to form a convex surface by means of a series of rollers similar to those described and actuated in a similar manner. The upper rollers are skewed slightly outwardly so as to separate the divided pieces of glass.</p> |
