Venting apparatus for a tire vulcanizing mold

Details Venting apparatus for a tire vulcanizing mold Venting apparatus for a tire vulcanizing mold

2005-08-02

2005-08-02

Mackey, James P. (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

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

C425S812000

Reexamination Certificate

active

06923629

ABSTRACT:
The present invention relates to an improved venting apparatus installed in a tire vulcanizing mold. In the venting apparatus, an inner diameter of a center through hole formed in the casing is gradually increased in an upper direction and is gradually decreased in a lower direction for thereby forming a tapered shape. The angles of the slant surfaces of the valve head point-contacting with an upper corner portion of the center through hole are different, so that a discharging capability of air is enhanced, and it is possible to prevent a formation of a vent rubber in a finished tire which vent rubber is formed when a rubber flows into a venting apparatus. In addition, it is possible to prevent an error operation during vulcanization and to extend a life span of a venting apparatus. The maintenance is easier.

REFERENCES:
patent: 3885618 (1975-05-01), Hodler
patent: 4492554 (1985-01-01), Carter
patent: 5939101 (1999-08-01), Green
patent: 5997783 (1999-12-01), Hunter et al.
patent: 6036899 (2000-03-01), Iwai et al.
patent: 195 43 276 (1997-02-01), None
patent: 2339163 (2000-01-01), None

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