| 摘要 |
<p>It comprises a transfer belt or chain (1) stretched between two drive wheels (11, 12) with vertical axes (shafts) (111, 121) and equipped with uniformly spaced drive means (13) which are each intended for holding (supporting) a carriage (2) including a movable holding and separating means (22) intended to form a group (31) of products (3), one of the strands (10) of the said chain (1) including two uncouplings (14, 15), the first (14) of which, located a short distance after the wheel (12) for supplying the carriages (2), makes it possible to detach them from the chain (1), whilst a roller (242) secured to the said carriage (2) engages in the groove (51) of a variable-pitch screw (5), the axis of which is parallel to the straight line connecting the two points (14, 15) of uncoupling and the length of which is approximately equal to the distance separating the said two points (14, 15) of uncoupling. <IMAGE></p> |
