| 摘要 |
Disclosed herein is a device for moving elements from a receiving location to delivery location which comprises a frame, two sets of stairs mounted on rectilinear, inclined slide bearings within the frame, a drive mechanism comprising a rocker assembly connected to both sets of stairs to reciprocate the stairs upwardly and downwardly on the bearings one set of stairs moving upwardly as the other moves downwardly. |
