Patent ID: 8066115

Claim:
An apparatus ( 10 ) for working on metal containers especially suited for high speed machines intended for performing a sequence of operations on the metal containers, said apparatus comprising a chain including a plurality of successively linked elements ( 12 ) cooperating in simultaneously transporting and processing the metal containers wherein each element ( 12 ) includes an annular central element ( 12 ′) suitable for receiving an interface element ( 16 ) that receives a metal container ( 18 ), said central element ( 12 ′) having oppositely disposed a male shaped link expansion ( 14 ) and a female shaped link ( 14 ′), said shaped link expansions having a toroidal type coupling and having a through hole orthogonal to the chain path, said male shaped link expansion ( 14 ) being annular and including at least one anti-friction element ( 17 ) coaxial to said through hole of said male shaped link expansion ( 14 ).