Apparatus for extruding a homogeneous tubular length of soft the

Details Apparatus for extruding a homogeneous tubular length of soft the Apparatus for extruding a homogeneous tubular length of soft the

1974-06-04

1976-10-12

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Stock pressurizing means operably associated with downstream...

Centripetal elastic melt extruder type

425466, B29D 2304

Patent

active

039854906

ABSTRACT:
An improved extrusion apparatus for extruding a tube of soft thermoplastic material of improved consistency and homogeneity is provided. A double walled piston having an annular chamber between the inner and outer annular walls thereof is mounted for sliding longitudinal movement between the interior wall of the apparatus housing and a longitudinal core disposed in the housing. The thermoplastic material fed into the apparatus first enters the annular piston chamber which, even during upward and downward movement of the piston, remains constant.

REFERENCES:
patent: 2736921 (1956-03-01), Mulbarger et al.
patent: 3099860 (1963-08-01), Schippers
patent: 3345690 (1967-10-01), Hagen
patent: 3386132 (1968-06-01), Fischer
patent: 3479422 (1969-11-01), Zavasnik
patent: 3522629 (1970-08-01), Langecker
patent: 3664781 (1972-05-01), Wioman
patent: 3690806 (1972-09-01), Kovacs
patent: 3801254 (1974-04-01), Godtner

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