Apparatus for controlling the flow of air for external cooling o

Details Apparatus for controlling the flow of air for external cooling o Apparatus for controlling the flow of air for external cooling o

1992-05-11

1994-06-07

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

425143, 4253261, 4253871, B29C 4790

Patent

active

053184270

ABSTRACT:
An apparatus is provided for controlling the flow of air for external cooling of a tubular film issuing 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, flow-directing flaps are evenly distributed around the tubular film and are displaceable along the tubular film.

REFERENCES:
patent: 4189288 (1980-02-01), Halter
patent: 4209475 (1980-06-01), Herrington et al.
patent: 4606879 (1986-08-01), Cerisano
patent: 4826414 (1989-05-01), Planeta
patent: 4842803 (1989-06-01), Bose et al.
patent: 4938903 (1990-07-01), Schaeffer et al.

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