Accumulator head used in the formation of a multi-layer parison

Details Accumulator head used in the formation of a multi-layer parison Accumulator head used in the formation of a multi-layer parison

1980-06-30

1981-10-27

Anderson, Philip

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

Extrusion shaping means

264514, 264540, 425532, 425380, 425462, 425467, B29D 2303, B29D 2304, B29C 1707

Patent

active

042970920

ABSTRACT:
An accumulator head is described as having an annular accumulation chamber, an annular ring-piston movable axially in the chamber for forcing resinous material from the chamber through an annular discharge passageway leading from the chamber to an annular discharge orifice which, for example, is in communication with a blow mold. An annular inlet is provided in the discharge passageway between the chamber and orifice as a means whereby resinous material is moved into the discharge passageway to add an outer laminate to material flowing through the discharge passageway, or as a means of filling the accumulation chamber with a slug of material.

REFERENCES:
patent: 3023461 (1962-03-01), Sherman
patent: 3453690 (1969-07-01), Mayner
patent: 3972664 (1976-08-01), Pilmann
patent: 4120633 (1978-10-01), Feuerherm
patent: 4149839 (1979-04-01), Iwawaki et al.
patent: 4152104 (1979-05-01), Przytulla et al.
patent: 4165212 (1979-08-01), Ziegler
patent: 4179251 (1979-12-01), Hess et al.
patent: 4208178 (1980-06-01), Przytulla

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