| 摘要 |
<p>An endless conveyor having a belt which follows a helical conveying path over part of its length and comprises a plurality of self-supporting tiers, wherein the lowermost tier of the stack is supported by a plurality of trolleys (36) running around a support rail (30), the trolleys being individually driven around the support rail by an internal drum (13) which is driven in rotation also to drive the belt. <IMAGE></p> |
