Patent ID: 7124798

Claim:
Device ( 1 ) for feeding foil ( 2 , 2 a , 2 b ) for the manufacture of foil bags comprising: at least one supply roll holder ( 3 , 3 a , 3 b ) that can be driven with a drive; at least one piece of conveyor equipment ( 4 ) for conveying a foil ( 2 , 2 a , 2 b ) from a supply roll ( 5 , 5 a , 5 b ), the supply roll ( 5 , 5 a , 5 b ) being held in the supply roll holder ( 3 , 3 a , 3 b ); at least one foil sensor mechanism ( 6 , 6 a , 6 b ) which is arranged between the supply roll holder ( 3 , 3 a , 3 b ) and the conveyor equipment ( 4 ), the at least one foil sensor mechanism ( 6 , 6 a , 6 b ) including at least one stationary deflection roll ( 7 , 7 a , 7 b ) and, as held in movable supports ( 10 , 10 a , 10 b , 11 , 11 a , 11 b ), a first and second dancer roll ( 8 , 8 a , 8 b , 9 , 9 a , 9 b ) for turning the foil ( 2 , 2 a , 2 b ) around; the at least one foil sensor mechanism ( 6 , 6 a , 6 b ) for regulating the drive of the supply roll holder ( 3 a , 3 b ) is formed in dependence on the distance from one of the first and the second dancer roll ( 8 , 8 a , 8 b , 9 , 9 a , 9 b ) to the deflection roll ( 7 , 7 a , 7 b ), and the moveable supports ( 10 , 10 a , 10 b , 11 , 11 a , 11 b ) of the first and second dancer rolls ( 8 , 8 a , 8 b , 9 , 9 a , 9 b ) are hung into at least one flexible hanger ( 12 , 12 a , 12 b ) that is guided via a deflection wheel ( 13 , 13 a , 13 b , 14 , 14 a , 14 b ) and so coupled together that the weights of the first and second dancer rolls ( 8 , 8 a , 8 b , 9 , 9 a , 9 b ) are at least partially offset.