| 摘要 |
<p>A tire building apparatus (1) comprises a group of many segments (5) enlarging to pushingly lock a bead portion (Bp) of a green tire, a ring-shaped inner piston (8) engaging with each segment of such a group, a ring-shaped outer piston (9) contacting and engaging with a back face of the inner piston, a cylinder (6) slidably housing the inner piston and the outer piston therein, a pair of gas pressure acting means moving each of the inner piston and outer piston inward or outward in the direction of the axial line, and a stopper formed in the cylinder. <IMAGE></p> |
