Cooling apparatus for air cooling tubular plastics film made by

Details Cooling apparatus for air cooling tubular plastics film made by Cooling apparatus for air cooling tubular plastics film made by

1976-12-13

1978-03-21

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Means treating shaped work

425 72R, B29F 308

Patent

active

040801438

ABSTRACT:
In a film blowhead for making tubular plastics film, internal cooling air is supplied through a central aperture in the blowhead to superposed cooling air supply rings which support the film on the inside and have outlet apertures facing the film as well as apertures extending axially therethrough for withdrawing the heated cooling air. A central tube is provided to supply the cooling air, the tube being connected to the air supply rings by radial air passages. The annular space between the central tube and the film blowhead and the air supply rings forms an annular passage for withdrawing the heated cooling air.

REFERENCES:
patent: 3709290 (1973-01-01), Upmeier
patent: 3976411 (1976-08-01), Rahlfs et al.
patent: 3990828 (1976-11-01), Reifenhouser

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