Mold vent plug

Details Mold vent plug Mold vent plug

1987-10-06

1989-01-03

Hoag, Willard

Plastic article or earthenware shaping or treating: apparatus

Reshaping, resizing or vulcanizing means for tire, tire...

425812, B29C 3500, B29C 3926

Patent

active

047953314

ABSTRACT:
A vent plug for a mold having a head, neck and collar where the collar seats the plug in a bore in the mold, and the head forms an annulus with the bore for passage of air to the neck and past the collar to a cross vent and drilled hole providing a labyrinth to vent the mold. The bore may be counterbored to receive the head.

REFERENCES:
patent: 3110339 (1963-11-01), Fickel
patent: 3377662 (1968-04-01), Fukushima
patent: 3885618 (1975-05-01), Hodler
patent: 3941355 (1976-03-01), Simpson
patent: 3989430 (1976-11-01), Dailey
patent: 4305672 (1981-12-01), Adams
patent: 4436497 (1984-03-01), Dahl et al.
patent: 4436497 (1984-03-01), Dahl et al.

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