| 摘要 |
A belt and tread drum for use in the manufacture of vehicle tyres comprises a plurality of circumference-defining segments (28) whose radial position is determined by a cam means (38). The extent of movement of the cam means (38) is selectable by stop means (92) associated with a central shaft or axle (60) which serves to mount the cam means (38) and the stop means (92). Visual indication of the selected circumference of the drum is provided. <IMAGE> |
