Air cooling ring for plastic film with independent...

Details Air cooling ring for plastic film with independent... Air cooling ring for plastic film with independent...

B - Operations, Transporting

29

D

18/528

B29D 7/00 (2006.01)

Patent

CA 1114117

ABSTRACT Air ring for cooling a hot extruding tube of plastic film in which a lubricating air bleed port communicates with air from the air ring plenum independent of the cooling air flow path. The bleed port communicates with a bleeded air passage that extends to an annular lubricating air outlet positioned in advance of a guide surface that precedes the cooling air outlet. In an exterior air ring a valve arrangement limits the bleeded flow to the minimum desired.

323722

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