| 摘要 |
<p>This device comprises two parallel and horizontal shafts (26) carried by the upper part of the framework (3) of the machine (2), near the ends of which shafts are wedged levers (27) bent approximately at a right angle, connected in pairs from one shaft (26) to the other via one (27a) of their arms (27a, 27b) by means of connecting rods (28) which are approximately horizontal and perpendicular to the axis of the shafts (26), and each lever connected via its other arm (27b) to the frame (11) supporting the feed box (10) through the intermediary of other connecting rods (29), which are approximately vertical and parallel to each other, means (30, 31, 40 to 43) being provided for pivoting at least one of the shafts (26), in order to fix the frame (11) in position at the desired height and to guide it when it moves. <IMAGE></p> |
