Air cooling ring for plastic film with independent lubricating a

Details Air cooling ring for plastic film with independent lubricating a Air cooling ring for plastic film with independent lubricating a

1979-03-15

1981-06-09

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

264569, 4253261, 425445, B29F 308, B29D 722

Patent

active

042722314

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.

REFERENCES:
patent: 2926384 (1960-03-01), Hertz et al.
patent: 2947031 (1960-08-01), Chow et al.
patent: 3548042 (1970-12-01), Hinrichs
patent: 4049768 (1977-09-01), Luthra
patent: 4139338 (1979-02-01), Cole

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