Film blowhead for producing tubular film

Details Film blowhead for producing tubular film Film blowhead for producing tubular film

1975-09-23

1977-04-26

Spicer, Jr., Robert L.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

264 95, 425326R, B29D 2304

Patent

active

040198430

ABSTRACT:
In a blowhead for producing tubular film from thermoplastic material flowing from an extruder, a central supply conduit branches into a plurality of radial distributing passages having their axes in substantially one plane. Each distributing passage extends into an axial passage portion that is parallel to the supply conduit and that opens into a distributing helix. Inlet and outlet tubes for cooling air are provided between the axial distributing passage portions.

REFERENCES:
patent: 3400184 (1968-09-01), Matsuo et al.
patent: 3709290 (1973-01-01), Upmeier
patent: 3714309 (1973-01-01), Biglono
patent: 3902832 (1975-09-01), Gregory et al.

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