Patent ID: 8206559

Claim:
An apparatus for electrophoretic repainting of lids for containers for food use, comprising: a tank ( 30 ) containing an electrophoretic bath; an electrode, immersed in the electrophoretic bath; a conveyor line ( 10 ), provided with supporting elements for lids ( 20 ), the conveyor line ( 10 ) being arranged to transit internally of the tank ( 30 ) in order to immerse the lids ( 20 ) in the electrophoretic bath; a unit ( 40 ) for establishing an electrical contact with the lids ( 20 ) transiting immersed in the bath, having an opposite polarity with respect to a polarity of the electrode immersed in the bath, characterized in that the contact unit ( 40 ) includes a rotation element ( 4 ), rotatable about a longitudinal axis parallel to an advancement direction (W) of the conveyor line ( 10 ), an external lateral surface of the rotation element ( 4 ) affording a groove ( 5 ), ( 500 ) having a helical progression, destined to receive electrical conductor means to contact at least an end portion ( 21 ) of the lids ( 20 ), arrangement of the rotation element ( 4 ) above the tank ( 30 ) and with respect to the conveyor line ( 10 ) being such that at least a point of the electrical conductor means maintains contact with the end portion ( 21 ) of the lids ( 20 ) during transit thereof in immersion in the bath of the tank( 30 ).