Abstract: The folding machine has a cross fold module which includes a cross-fold folding blade (18), a sheet-supporting device (38) which is arranged below the cross-fold folding blade (18) and on which an incoming sheet comes to rest, and a roller frame (27) which is arranged below the sheet-supporting device (38) and into which a sheet is introduced by the cross-fold folding blade (18). A three-fold module (22) with a three-fold folding blade (24) arranged perpendicularly with respect to the cross-fold folding blade (18) is arranged downstream of the roller frame (27). The three-fold module (22) and the roller frame (27) are arranged on a rotary stand (20) which is rotatable through at least 180 about a vertical axis (28).

Abstract: The holding-down arrangement for holding down a sheet (24) in a sheet-bearing region of a sheet-processing machine, in particular of a folding machine, includes a plurality of blowing devices (19, 21) which, during use, are directed toward a sheet (24) and direct an air jet (20, 22) onto the sheet (24). The holding-down arrangement may be fitted in a sheet-aligning device which is arranged downstream of a sheet infeed and includes a sheet-bearing device (12), on which an incoming sheet (24) comes to rest.

Abstract: The folding machine has a cross fold module which includes a cross-fold folding blade (18), a sheet-supporting device (38) which is arranged below the cross-fold folding blade (18) and on which an incoming sheet comes to rest, and a roller frame (27) which is arranged below the sheet-supporting device (38) and into which a sheet is introduced by the cross-fold folding blade (18). A three-fold module (22) with a three-fold folding blade (24) arranged perpendicularly with respect to the cross-fold folding blade (18) is arranged downstream of the roller frame (27). The three-fold module (22) and the roller frame (27) are arranged on a rotary stand (20) which is rotatable through at least 180° about a vertical axis (28).

Abstract: The invention relates to a sheet processing arrangement with a sheet processing device, at least two parallel running streams of sheets (D1, D2, E1, E2) being produced. The arrangement also has a merging device (11) for making the streams of sheets (D1, D2, E1, E2) merge into a single stream of sheets (F1, F2), the stream of sheets (F1, F2) being fed by a chain table (13) to a further processing machine arranged downstream of the merging device (11).

Abstract: A folding unit has at least one pair of folding rollers including an adjustable folding roller and a stationary folding roller or two adjustable folding rollers. At least two pressure measuring devices are associated to one adjustable folding roller, the pressure measuring devices being arranged at a distance from one another and measuring pressure values when a sheet passes therethrough. The pressure values correspond to pressures which are exerted on said sheet by the adjustable folding roller at two measurement points which are spaced apart transversely with respect to a sheet running direction. The pressure measuring devices forward measured pressure values to a processing device. Each adjustable folding roller is connected kinematically to a corresponding drive at two connection points which are spaced apart transversely with respect to the sheet running direction.

Abstract: In the method for monitoring the position of a sheet (36, 38, 48) transported in a folding machine, during the transport of the sheet (36, 38, 48), at a detection location, the positions of a sheet edge (37, 39, 49) running substantially in the transport direction (TR) are determined by a detection device (32, 34, 46). Measured values corresponding to the positions detected are then passed on to a processor device by the detection device (32, 34, 46). The processor device calculates a measured curve (MK1, MK2, MK3) on the basis of the detected measured values and the travel of the sheet (36, 38, 48) through the detection location and compares this with a previously determined reference curve (RK). The processor device outputs an error signal if the measured curve (MK1, MK2, MK3) deviates from the reference curve (RK).

Abstract: The folding machine includes at least one pair of knife shafts, the knife shafts (22, 24) of which are, in a working position, mounted parallel to each other between two spaced-apart side walls (18, 20) of the folding machine (10). In order, in parallel with the production process, to be able to prepare knife shafts for a subsequent production process, the knife shafts (22, 24) are mounted in a cassette (28) which can be displaced through a sidewall (20) facing the operator from an inserted position, in which the knife shafts (22, 24) are in their working position, into a pull-out position, in which the knife shafts (22, 24) are outside the folding machine (10).

Abstract: The holding-down arrangement for holding down a sheet (24) in a sheet-bearing region of a sheet-processing machine, in particular of a folding machine, includes a plurality of blowing devices (19, 21) which, during use, are directed toward a sheet (24) and direct an air jet (20, 22) onto the sheet (24). The holding-down arrangement may be fitted in a sheet-aligning device which is arranged downstream of a sheet infeed and includes a sheet-bearing device (12), on which an incoming sheet (24) comes to rest.

Abstract: A folding device includes a folding machine with a folding unit, and a prefolding apparatus for prefolding a sheet before it is feeded into the folding unit of the folding machine. The prefolding apparatus includes a sheet stacking apparatus, on which a sheet stack is stored. A perforating or scoring device perforates or creases a sheet fed from the sheet stacking apparatus along a longitudinal center line thereof. A plow folding unit folds the perforated or creased sheet around the longitudinal center line.

Abstract: In the case of the method of, and the apparatus for, processing sheets further to produce multi-leaf printed products, a plurality of sheets (20) are folded around a folding line (30) and are then collated one above the other such that the folding line (30) is located at the top and the folded sheets (20) open in the downward direction. An adhesive (34) is applied to the sheets (20), in the region of the folding line (30), prior to collation.

Abstract: In the case of the process for producing multi-leaf printed products, different types of sheets, which are printed by various printing methods, are set down one after the other in the conveying direction, in accordance with a freely selectable sequence, on a main conveying device at different set-down stations, the sheets subsequently being folded one after the other and then collated one above the other.

Abstract: In the case of the method by which sheets which are printed, in particular, by a digital-printing machine are processed further to produce multi-leaf printed products, the printed sheets are folded at least once to form a folded sheet, and the folded sheets are collated one above the other. The sheets are folded prior to collation such that the folding edge of the folded sheet is located at the top and the folded sheet opens in the downward direction, with the result that the folded sheets can maintain their position prior to collation.

Abstract: In the case of the method of, and the folding machine for, folding a plurality of sheets (50) in a buckle folder (12) with at least a first and a second buckle plate (30, 34, 70), in which a respective first sheet stop (32) and a second sheet stop (36, 72) are provided and between which at least one pair (41) of folding rollers, with folding rollers (40, 42) rotating in opposite directions, is arranged, the sheets (50) are transported one after the other into the first buckle plate (30) until they strike against the corresponding sheet stop (32), in which case they are collected in the first buckle plate (30) to form a group (51) of sheets.

Abstract: The folding machine includes at least one pair of knife shafts, the knife shafts (22, 24) of which are, in a working position, mounted parallel to each other between two spaced-apart side walls (18, 20) of the folding machine (10). In order, in parallel with the production process, to be able to prepare knife shafts for a subsequent production process, the knife shafts (22, 24) are mounted in a cassette (28) which can be displaced through a sidewall (20) facing the operator from an inserted position, in which the knife shafts (22, 24) are in their working position, into a pull-out position, in which the knife shafts (22, 24) are outside the folding machine (10).