An apparatus comprises a conveying device (1) provided with seat means (5) arranged for receiving objects (80), said seat means (5) being movable along a curved path (P1), and a further conveying device (6) provided with transferring means (8) arranged for delivering said objects (80) to, and/or removing said objects (80) from, said conveying device (1), characterised in that said transferring means (8) comprises coupling means (32; 160; 260; 360; 328) arranged for engaging said seat means (5) in such a way that said seat means (5) and said transferring means (8) are maintained mutually coupled along a portion (Z) of said curved path (P1).