and because the gap between the cylindrical body 149 and the tire forming drum 101 is too small for the bladder 161 to come in between the cylindrical body and the tire forming drum if the length y is more than 70 of the total length z after that the motor 117 is operated while being accurately controlled by the encoder 122 so as to rotate the screw shaft 114 to move the stand 113 and the cylindrical body 149 together toward the axially middle part of the tire forming drum 101 while the stand and the cylindrical body are guided on the rails 111 as shown in fig1 c at that time the bladder 161 cannot slip because of tight contact with the inside surface of the cylindrical body 149 so that the bladder is deformed and moved while rolling toward the axially middle part of the tire forming drum 101 for that reason the outer end of the portion 174 is pulled toward the axially middle part of the drum 101 while being pinched between the cylindrical body 149 and the bladder 161 so that the portion 174 is gradually turned and bent over around the bead 172 the portion 174 is thus gradually pushed onto the bead 172 and the filler 173 by the deformed and moved bladder 161 so that the portion 74 is placed into tight contact with the bead and the filler while the air is being discharged when the cylindrical body 149 is moved further toward the axially.