In a saddle-stitching apparatus, when a sheet is transported to a center-folding unit, a folding blade moves from a retrieved position to a nip position between a pair of folding rollers. A forward end of the folding blade comes into contact with a fold of the sheet, so that the sheet is folded along the fold. When the sheet is attached to the nip position between the folding rollers, the folding rollers start rotating and then, the folding blade inserts the center-folded sheet between the folding rollers. After the center-fold finishing is completed, the rotations of the folding rollers stop in timing at which the folding blade is pulled out of the nip position between the folding rollers. When pulling the folding blade out of the nip position between the folding rollers, the rotations of the folding rollers restart.

An apparatus for producing printed products such as books, magazines, brochures, catalogues or the like comprises several connected devices for the processing of printed sheets. The printed sheets are admitted with blast air via at least one air supply in order to change or maintain their position. At least two of the connected devices are respectively provided with at least one blower for generating blast air. The blast air can be used in the respective device. The blowers are connected to a control unit of the apparatus so that the blast air generated by the blowers can be controlled as needed.

An apparatus for producing printed products such as books, magazines, brochures, catalogues or the like comprises several connected devices for the processing of printed sheets. The printed sheets are admitted with blast air via at least one air supply in order to change or maintain their position. At least two of the connected devices are respectively provided with at least one blower for generating blast air. The blast air can be used in the respective device. The blowers are connected to a control unit of the apparatus so that the blast air generated by the blowers can be controlled as needed.

The invention relates to a device (1) for the stacking, in packets, of bags produced from plastic film, the device (1) having at least one traction means, preferably a toothed belt (2), and at least one carrier (4), on which the bags can be laid flat on each other and which can be fastened to the traction means for driving, and the at least one carrier (4) having at least one means, in particular one driver element (3), for driving the laid bags, the driver element (3) being arranged on the carrier (4) in such a way that the position of the driver element can be changed.