Pneumatic tire manufacture

Details Pneumatic tire manufacture Pneumatic tire manufacture

1977-09-14

1979-05-15

Silbaugh, Jan H.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

264326, B29H 502

Patent

active

041547900

ABSTRACT:
A method of moulding a tire in a mould in which the retaining rings for the bead formation of a green tire 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: 2904832 (1959-09-01), Frohlich et al.
patent: 2939175 (1960-06-01), Frohlich et al.

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