| 摘要 |
<p>Apparatus for effecting angular manipulation of a top roller suitable for use in the manufacture of float glass to control the position of a margin of a glass ribbon floating in a float chamber comprises a top roller mounted at the distal end of a rotatable drive shaft 10 which is connected to two pivot bearings 16, 17 for relative pivotal movement about an axis A, B at each such pivot bearing and which is longitudinally movable with respect to at least one of those pivot bearings (16), a support frame 14 defining two parallel rectilinear tracks 22, 23, and means for driving the pivot bearings 16, 17 along those tracks at speeds which differ in a predetermined ratio thereby to cause the shaft 10 to swing about an axis whose position is determined by that predetermined speed ratio and the distance AB between the pivot axes. <IMAGE></p> |
