Patent ID: 8286787

Claim:
Chain ( 30 ) for a conveyor of an apparatus ( 10 ) for accumulating and arranging products or packs (P) into groups, the chain ( 30 ) being made loop-closed by means of a series of links articulated to each other through a connection of pins ( 32 ) connected by plates ( 33 ), wherein each link is provided with a driving portion ( 34 ) and a drawing portion ( 35 ) of sliding blocks ( 50 ) provided for accommodating the products or packs (P), such drawing portion ( 35 ) being provided with guide plates ( 37 , 37 â€²) of the sliding blocks ( 50 ), wherein said guide plates ( 37 , 37 â€²) are substantially rectangular shaped with rounded edges, are made with a height (a) suitably greater than the one of the plates ( 33 ), and are assembled on pins in longitudinal centreline position in such a manner to project symmetrically above and beneath the plates ( 33 ), wherein said chain is provided with rollers ( 36 ) inserted on said pins ( 32 ) and wherein said chain is a double chain in which two distinct rollers ( 36 ) are separately inserted on the same pin ( 32 ), separated by the relative plates ( 33 , 37 ) in such a manner to provide the driving portion ( 34 ) separated from the drawing portion ( 35 ), and wherein said chain is a double O-RING chain ( 38 ) with guide plates ( 37 ) assembled on both sides of the drawing portion, the O-RINGS ( 38 ) are inserted in the driving portion between the plates ( 33 ) on one side and between the plates ( 33 ) and the guide plates ( 37 ) on the other side of the driving portion which is adjacent to the drawing portion, the guide plates assembled in proximity to the driving portion are directly in contact with the O-RINGs ( 38 ) and serve both for connections between the pins ( 32 ) for the driving portion and for holding and connection between the same pins ( 32 ) in the drawing portion.