| 摘要 |
<p>Movable device comprises a drive-rotated chain-wheel on the front of a frame and a driven chain - and wheel on the rear of the frame extension. An endless chain with an upper and a lover section engages the wheels and extends along the frame and its extension. A carriage is releasably connected with the rotating chain by a first device. A second device moves the frame extension to the rear during chain rotation and a third device forms a loop in the lower chain section and moves the extension to the front of the frame. A forth device turns the rear end of the workpiece about the same longitudinal axis as the drive section.</p> |
