Stacker drum of sheet accumulating device

Claim 1

In a sheet accumulating device having a stacker drum adapted to rotate about a horizontal axis and having at least one cylindrical drum structure provided around the cylindrical surface thereof with a plurality of blades secured at their inner root parts to the drum structure and extending tangentially in the direction opposite to the circumferential direction of rotation of the drum structure to their outer ends, each blade thereby having an outer leading surface and an opposite, inner trailing surface, sheets such as pieces of paper money fed continuously and successively along a feeding chute being fed into respective spaces between adjacent blades of the rotating stacker drum to be successively upended and accumulated into neat stack, the improvement which comprises a leaf spring secured at an outer end thereof to the outer end of each of said blades on the outer leading surface thereof and extending toward the root part of the adjacent blade in said rotational direction, said leaf spring having a convex curved surface facing, and lightly contacting the inner trailing surface of said adjacent blade, said leaf spring being adapted to reduce the degree of freedom of a sheet fed into the space between the said convex curved surface and said adjacent blade.