B - Operations – Transporting – 29 – D
Patent
B - Operations, Transporting
29
D
154/27.04
B29D 28/00 (2006.01) B07B 1/46 (2006.01) B29C 31/00 (2006.01) B29C 53/12 (2006.01) B29C 53/66 (2006.01) B29C 65/02 (2006.01) B29C 65/20 (2006.01) B29C 69/00 (2006.01)
Patent
CA 1197166
"APPARATUS FOR MAKING PLASTIC SCREEN PANELS" ABSTRACT Apparatus for making plastic screen panels, and especially abrasion-resistant mining screens, includes a large rotary screen drum member on which an extruded, profiled cross-section screen surface- forming wire is helically wound at a pitch which will produce the de- sired screen slot width. Immediately adjacent the drum member is a rod-positioning mechanism from which a plurality of screen panel sup- port rods are sequentially fed from a stack and welded to the wires on the drum surface in a direction parallel to the drum axis and trans- verse to the surface wires. The welding is done with a double-edged heater bar which is temporarily placed in contact with the rod and drum before the rod is forced against the drum. The screen drum is indexed after each support rod is attached to it by an angular amount sufficient to provide the desired spacing on the finished panel. After all the rods are attached to the wire-covered drum, the wires are severed along a line parallel to the drum axis and the now-finished panel is removed and used as is or preferably is cut to form several smaller panels.
434433
Benson Henry E.
Koehler Raymond A.
Macrae & Co.
Uop Inc.
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