Apparatus for the production of double-walled synthetic plastic

Details Apparatus for the production of double-walled synthetic plastic Apparatus for the production of double-walled synthetic plastic

1975-03-18

1976-08-24

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

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

Extrusion shaping means

425381, 425395, B29D 2304

Patent

active

039764141

ABSTRACT:
An improvement in an apparatus for forming an outer corrugated tube wherein the corrugations of said tube abut an inner tube within said corrugated tube, said apparatus comprising means for forming an outer corrugated tube about a dye, means for forming said inner tube about a central mandrel within said corrugated tube, the improvement comprising means for urging an inner tube against the corrugations of said outer corrugated tube, said means comprising a presser floating mounted within said inner tube in facing relationship to said inner tube and bearing outward towards said inner tube.

REFERENCES:
patent: 3188690 (1965-06-01), Zieg
patent: 3201827 (1965-08-01), Reynolds et al.
patent: 3349156 (1967-10-01), Zieg
patent: 3677676 (1972-07-01), Hegler
patent: 3743456 (1973-07-01), Cini
patent: 3743457 (1973-07-01), Cini

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