Blow-head for tubular film

Details Blow-head for tubular film Blow-head for tubular film

1974-02-12

1976-01-06

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

425387R, 425326R, 425461, B29D 2304

Patent

active

039307689

ABSTRACT:
In a blow-head for producing tubular film from thermoplastic molten material and comrising a housing with a central supply conduit for the molten material and distributing passages radiating from the supply conduit to a respective distributing helix of an insert member, means for internally cooling the blown film comprise concentric air inlet and outlet passages extending axially of the housing and each connected to at least one inlet tube and one outlet tube, respectively, the tubes being disposed between adjacent said radiating distributing passages and extending to the exterior of the housing.

REFERENCES:
patent: 3647339 (1972-03-01), Upmeier

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