Safety air plug and extrusion apparatus using same

Details Safety air plug and extrusion apparatus using same Safety air plug and extrusion apparatus using same

1988-10-24

1989-09-19

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Diverse distinct type shaping means

Shaping orifice and either a downstream preform reshaping...

251357, 2642094, 425 71, 425 721, 425151, 4253871, B29C 4788, B29C 4796

Patent

active

048676691

ABSTRACT:
A safety plug for an extrusion apparatus for extruding pipe is provided with a valve opening when its tether to the extrusion die breaks. The valve can be formed by a disk on a rod which is axially displaceable in a tubular body having a flange forming a valve seat for the disk of the rod. The rod is connected to the chain.

REFERENCES:
patent: 1177204 (1916-03-01), Miller
patent: 3116348 (1963-12-01), Walker
patent: 3202178 (1965-08-01), Wolfe
patent: 3296661 (1967-01-01), De Moustier
patent: 3784345 (1974-01-01), Wissinger et al.
patent: 3814564 (1974-06-01), Streng et al.
patent: 4088724 (1978-05-01), Kuhnert
patent: 4708841 (1987-11-01), Larsen

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