Dragging element for dragging web materials comprising at least a portion with at least one through cut (2) apt to engage a part (40) of a web material (4) intended to be moved in a direction imposed by the same dragging element that follows a predetermined operating path, said at least one cut (2) is helicoidal.

A banknote stacking device includes an input mechanism configured to convey banknotes one by one, a stacking platform mechanism configured to stack and support banknotes conveyed by the input mechanism one by one a pressing and conveying mechanism located above the stacking platform mechanism and configured to press banknotes and convey the banknotes stacked on the platform forward. The pressing and conveying mechanism has a pressing rod, and the pressing rod has one end rotatably arranged on the upper conveying rotating shaft and another end forming a free end and falling freely towards the platform, the rotatable securing end and the free end of the pressing rod are respectively provided with a first concave wheel and a second concave wheel, and a first O-shaped belt is arranged on the first concave wheel and the second concave wheel. The first concave wheel rotates synchronously with the upper conveying rotating shaft.

A banknote stacking device includes an input mechanism configured to convey banknotes one by one, a stacking platform mechanism configured to stack and support banknotes conveyed by the input mechanism one by one a pressing and conveying mechanism located above the stacking platform mechanism and configured to press banknotes and convey the banknotes stacked on the platform forward. The pressing and conveying mechanism has a pressing rod, and the pressing rod has one end rotatably arranged on the upper conveying rotating shaft and another end forming a free end and falling freely towards the platform, the rotatable securing end and the free end of the pressing rod are respectively provided with a first concave wheel and a second concave wheel, and a first O-shaped belt is arranged on the first concave wheel and the second concave wheel. The first concave wheel rotates synchronously with the upper conveying rotating shaft.

A banknote stacking device includes an input mechanism configured to convey banknotes one by one, a stacking platform mechanism configured to stack and support banknotes conveyed by the input mechanism one by one a pressing and conveying mechanism located above the stacking platform mechanism and configured to press banknotes and convey the banknotes stacked on the platform forward. The pressing and conveying mechanism has a pressing rod, and the pressing rod has one end rotatably arranged on the upper conveying rotating shaft and another end forming a free end and falling freely towards the platform, the rotatable securing end and the free end of the pressing rod are respectively provided with a first concave wheel and a second concave wheel, and a first O-shaped belt is arranged on the first concave wheel and the second concave wheel. The first concave wheel rotates synchronously with the upper conveying rotating shaft.