| 摘要 |
Apparatus defining an outer circumference suitable to serve as a forming surface or an inner circumference suitable to serve as a circumference-engaging surface. The apparatus is particularly useful in the forming of the belt and tread package of a vehicle tire or as a transfer ring for grasping a belt and tread package of a vehicle tire. The apparatus includes a plurality of multi-sectioned segments of arcuate cross-section which collectively define the cylindrical surface of the apparatus and which are supported for movement radially of the longitudinal axis of the apparatus for adjustment of the circumference of the cylindrical surface. Each segment includes an intermediate section and two side sections hingedly connected to the intermediate section. The segments also include guide plates which cooperate with a side section of an adjacent segment so that movement of each segment radially of the drum effects a corresponding hinged movement of a side section of an adjacent arcuate segment.
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