ANORDNING FOR BOJNING AV EN GLASSKIVA I FORMBART TILLSTAND

摘要

In glass bending apparatus employing an array of curved rods to define a cylindrical surface over which glass sheets heated to plasticity are traversed in order to conform them to that surface, the invention provides a roller construction which includes for each roller a corrugated tube engaged over a curved rod and caused to rotate and to flex with respect to the rod by suitable driving mechanism, the tube having a plurality of bearing rings affixed inside thereof between adjacent inwardly directed corrugations of the tube and disposed radially inwardly of an outwardly extending corrugation of reduced diameter at which annular sections of the tube are assembled as by welding at a circumferential seam. At each such seam a split ring is assembled over the seam to restore the outwardly extending corrugation of the tube to full diameter.