| 摘要 |
A tire forming drum provided with two half drums axially mobile relative to each other and arranged to support on their outer periphery tubular plies of a carcass to be formed, each half drum being arranged to produce automatic folding of the relative end of said tubular plies about a respective annular bead by means of a respective multiple air chamber element rigid at one end with an outer flange of the relative half drum, and at the other end with a tubular support member mobile under the thrust of said multiple air chamber element between a retracted rest position inside said flange and an extracted working position in which said tubular member projects axially outward from the relative half drum. |
