Extrusion head

Details Extrusion head Extrusion head

1976-03-04

1977-07-26

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Adjustable shaping orifice or shape imparting insert member

425381, 425467, B29F 304

Patent

active

040380173

ABSTRACT:
An extrusion head for the manufacture of a hollow string of thermoplastic material whereby the resulting product consists of two concentric layers of the material whose weld seams are staggered in relation to one another, and whose union is accomplished without the two materials being formed into separate tubular layers. Provisions are made to maintain the layers' ratio of wall thickness.

REFERENCES:
patent: 3386132 (1968-06-01), Fischer
patent: 3520966 (1970-07-01), Soffiantini
patent: 3522629 (1970-08-01), Langecker

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