Process and apparatus for controlling dimensions in plastic...

Details Process and apparatus for controlling dimensions in plastic... Process and apparatus for controlling dimensions in plastic...

B - Operations, Transporting

29

D

18/719

B29D 7/04 (1980.01) B29D 27/00 (1980.01)

Patent

CA 1044414

Abstract of the Disclosure Caliper in the cross direction in webs of extruded foamed plastic produced by longitudinal slitting of a tubular extrusion is controlled by differentially heating the extrusion die circumferentially about its axis. This can be accomplished by locating a plurality of independently controllable heaters around the die.

142568

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