Pneumatic tire manufacture

Details Pneumatic tire manufacture Pneumatic tire manufacture

1976-09-22

1977-11-29

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

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

Toroidal or annular female shaping means and coacting means...

425 58, B29H 502

Patent

active

040603571

ABSTRACT:
The retaining rings for the bead formation of a green tire in a tire mould are variable in diameter to allow for increase in the bead diameter of the finished tire relative to its green state and to prevent damage caused by forcing the beads of a green tire over bead rings of too large diameter. Preferably the bead retaining rings expand to their maximum diameter in response to the application of curing pressure inside the tire and automatically retract when curing pressure is relieved.

REFERENCES:
patent: 2880459 (1959-04-01), Weigold et al.
patent: 3260782 (1966-07-01), Soderquist
patent: 3794457 (1974-02-01), Gaguit
patent: 3846058 (1974-11-01), Yoshida et al.
patent: 3988077 (1976-10-01), Naratov et al.

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