Patent ID: 7806157

Claim:
A tyre building drum ( 1 ) comprising: a central shaft ( 2 ); two coaxial, cylindrical half-drums ( 5 ) mounted to slide along the central shaft ( 2 ); actuating means ( 3 ) for moving the two half-drums ( 5 ) in opposite directions along the central shaft ( 2 ); and a substantially cylindrical, telescopic central body ( 6 ) coaxial with the two half-drums ( 5 ), connecting the two half-drums ( 5 ), and comprising a tubular central member ( 8 ) integral with an intermediate point of the central shaft ( 2 ), two tubular end members ( 10 ) integral with the respective half-drums ( 5 ), and two substantially cylindrical intermediate segments ( 13 ) interposed between the tubular central member ( 8 ) and each tubular end member ( 10 ); characterized in that each tubular end member ( 10 ) is defined by the union of at least two end half-members ( 10 a , 10 b ) releasably connected rigidly to the half-drum ( 5 ) by a number of first releasable fastening devices ( 32 ); and each intermediate segment ( 13 ) is defined by the union of at least two intermediate half-segments ( 13 a , 13 b ) releasably connected rigidly to an inner annular flange ( 15 ) forming part of the central member ( 8 ) by a number of second releasable fastening devices including a plurality of screws ( 33 ) which screw inside respective axially extending threaded holes formed in flange ( 15 ).