| 摘要 |
<p>A positioning unit (132), comprising: a support (139, 137) for a member to be positioned; an actuator (141, 147) for moving the support between a plurality of predetermined working positions; a position selector (143) comprising a plurality of end-run elements that can be moved in an endless sequence into an operative position which determines an end-run position of the actuator corresponding to a said predetermined working position of the support, wherein the position selector is coupled to the actuator such that movement of the actuator during actuation drives the operation of the position selector. For the positioning of the guides of a conveyor of articles.</p> |
