Slit extrusion die

Details Slit extrusion die Slit extrusion die

1978-06-14

1980-01-08

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

425465, 425817C, B29C 1704, B29D 724, B29C 2300

Patent

active

041826060

ABSTRACT:
A slit extrusion die with a modified entry port which allows extrusion of a low denier tape at high draw down ratios is disclosed. The die has an entry port wherein the depth of the slit is greater at both ends than at the middle by an amount equal to 0.1 to 0.4 times the length of the slit.

REFERENCES:
patent: 1902953 (1933-03-01), Hazell
patent: 1952038 (1934-02-01), Fischer
patent: 1956564 (1934-05-01), Crane et al.
patent: 2698463 (1955-01-01), Conwell et al.
patent: 2718666 (1955-09-01), Knox
patent: 2816349 (1957-12-01), Pamm et al.
patent: 3131428 (1964-05-01), Mika
patent: 3156085 (1964-11-01), Jameson
patent: 3707837 (1973-01-01), Gibbon
patent: 3823053 (1974-07-01), Straub et al.
patent: 3860383 (1975-01-01), Sirevicius

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