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

1977-12-12

1979-03-20

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Means treating shaped work

425 72R, 4253261, B29D 722, B29D 2304

Patent

active

041451775

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: 3307218 (1967-03-01), Reifenhauser
patent: 3568252 (1971-03-01), Masuda et al.
patent: 3577488 (1971-05-01), Bigland
patent: 3775523 (1973-11-01), Haley
patent: 3804567 (1974-04-01), Recknagel
patent: 3867083 (1975-02-01), Herrington
patent: 3888609 (1975-06-01), Saint Eve et al.
patent: 3904334 (1975-09-01), Yazawa et al.
patent: 4022558 (1977-05-01), Herrington
patent: 4069292 (1978-01-01), Herrington et al.

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