Apparatus for controlling the flow of air for external...

Details Apparatus for controlling the flow of air for external... Apparatus for controlling the flow of air for external...

B - Operations, Transporting

29

C

B29C 47/88 (2006.01) B29C 47/92 (2006.01)

Patent

CA 2068241

1090-4 APPARATUS FOR CONTROLLING THE FLOW OF AIR FOR EXTERNAL COOLING IN AN EXTRUDER FOR MAKING TUBULAR FILM ABSTRACT OF THE DISCLOSURE An apparatus is provided for controlling the flow of air for external cooling in an extruder for extruding a tubular film from an extruder head. To ensure that the flow of the air for external cooling to the point at which the tubular film begins to expand can be controlled, regardless of the distance from that point to the extruder head, flaps are evenly distributed around the tubular film, and are displaceable along the tubular film.

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