Abstract: For folding sheet layers the folding blade (20) forms a comb. The comb gaps (27) are closed during fold pressing and opened during transfer of the fold to a conveyor (21). Thus the conveyor (21) engages the sheet only in the region of the comb gaps and easily withdraws the sheet without pressing it into contact against the folding blade (20). For controlling the gap variations a fully mechanical cam control (30) is provided underneath the working plane (10).

Abstract: For folding sheet layers the folding blade (20) forms a comb. The comb gaps (27) are closed during fold pressing and opened during transfer of the fold to a conveyor (21). Thus the conveyor (21) engages the sheet only in the region of the comb gaps and easily withdraws the sheet without pressing it into contact against the folding blade (20). For controlling the gap variations a fully mechanical cam control (30) is provided underneath the working plane (10).

Abstract: An apparatus for closing binding combs to bind stacks of sheet material together possesses a lower working ram having a bending pressing surface formed as a sliding face for perforating prongs of the binding comb, this sliding face being formed by two adjacent, cylindrical rollers, so that the perforating prongs are supported by exclusively rolling on the ram during the closing operation of the binding comb. As a consequence, such a small reaction force is imparted to the perforating prongs against the rolling movement that the binding comb cannot under any circumstances rotate in an undesired manner relative to a counter-ram, so that a squeezing of the binding comb in the region of an arm of the comb opposite the perforating prongs is prevented.