Arrangement for positioning and holding down sheets formed into stack

摘要

Free end (30) of first arm (19) projects above the aligned edge of the top sheet (14) and contacts it along a line (B-B), which moves from the free end of the arm towards its bearing position (17) as the stack increases in height. The centre of gravity (24) of the lever (18) lies along a line (25) which forms an angle ( delta opt) optimised according to a given equation. The weight (22) is preferably in the form of as cylinder.