Device for feeding foils for the manufacture of foil bags and device for the manufacture of foil bags

Device (23) for the manufacture of foil bags comprising:

• a heat-sealing device (24) for heat-sealing of at least two foils (2a, 2b);
• and at least two devices for feeding the two foils (2a, 2b), each foil feeding device including:
• at least one supply roll holder (3, 3a, 36) that can be driven with a drive;
• at least one piece of conveyor equipment 4 for conveying a foil (2, 2a, 2b) from a supply roll (5, 5a, 5b), the supply roll (5, 5a, 5b) being held in the supply roll holder (3, 3a, 3b);
• at least one foil sensor mechanism (6, 6a, 6b) which is arranged between the supply roll holder (3, 3a, 3b) and the conveyor equipment (4), the at least one foil sensor mechanism (6, 6a, 6b) including at least one stationary deflection roll (7, 7a, 7b) and, held in movable supports (10, 10a, 10b, 11, 11a, 11b), a first and second dancer roll (8, 8a, 8b, 9, 9a, 9b) for turning the foil (2, 2a, 2b) around;
• the at least one foil sensor mechanism (6, 6a, 6b) for regulating the drive of the supply roll holder (3a, 3b) is formed in dependence on the distance from one of the first and the second dancer roll (8, 8a, 8b, 9, 9a, 9b) to the deflection roll (7, 7a, 7b), and the moveable supports (10, 10a, 10b, 11, 11a, 11b) of the first and second dancer rolls (8, 8a, 8b, 9, 9a, 9b) are hung into at least one flexible hanger (12, 12a, 12b) that is guided via a deflection wheel (13, 13a, 13b, 14, 14a, 14b) and so coupled together that the weights of the first and second dancer rolls (8, 8a, 8b, 9, 9a, 9b) are at least partially offset.