Abstract: The device has a sheet-transfer cylinder (2) with a movable setting plate (3) which bears the sheet grippers (4) and whose lateral ends are individually adjustable during each revolution of the transfer cylinder (2) with the aid in each case of a roller lever (9) in the circumferential direction in such a way that the sheet transferred to the impression cylinder is in a position which corresponds to the precise printing register. For this purpose, each roller lever (9) mounted movably on the transfer cylinder (2) is guided in a guide path (15c), surrounding the cylinder axis (1) in an annular manner, of an actuator (15, 16) which is suspended pivotably above the cylinder axis (1). Said actuator is provided with individually adjustable stops (19a, 19b) which, by interaction with peripheral cams (24a to 24d) pivot the relevant actuator (15, 16) by a predeterminable amount during each revolution of the transfer cylinder (2) and thus displace the relevant end of the setting plate (3).

Abstract: Individual printed image elements from an image to be inspected are allotted individual nominal ink density values, as by scanning an ideal printed sheet by a CCD matrix camera. The ideal values are stored in a main memory having segments for maximum and minimum values for each image element. A multiplicity of proof images are scanned, and their density values measured and stored for each proof judged acceptable by an inspector. Thereafter, the variations in the acceptable proof density values are stored in the main memory as maximum and minimum acceptable deviations from the initial nominal values for each individual image element to provide a subjective tolerance value for the nominal density values in the main memory.

Abstract: The intaglio printing machine has three machine stands (I, II, III). Essentially, the impression cylinder (1) and the plate cylinder (2) are mounted in the first stand (I), the stencil rollers (10) and the inking unit (11) are mounted in the second stand (II), and the color-collect cylinder (8) is mounted in the third stand (III). The third stand (III) is adjustable in such a way that it can be removed from the space between the first and second stands and brought into an inoperative position, so that it is possible to bring the second stand (II) up against the first stand (I) to form an intaglio printing machine with direct inking. This results in a convertible intaglio printing machine by means of which a collect intaglio print can be made in a first operating position, in which all three stands assume their working position, and a direct intaglio print can be made in a second operating position, with the use of only the first and second stands.

Abstract: The draw-roller unit has only one suction roller (20b, 21b) as a draw roller, in which a constantly acting suction effect is effective along that circumferential portion round which the paper web is looped, whilst the remaining circumferential portion experiences no suction effect. The suction roller has a fixed hollow roller core (65) and a roller casing (61) rotatable about this and consisting of plastic-impregnated carbon fibres, with suction ports (62) distributed over its circumference. The roller core (65) is equipped, on its one side, with an axial connection piece (68b) for fastening to the machine stand and for connection to a vacuum source, on its other side with a bearing journal (66) and, on its circumference having passage orifices (70) with two radial partition walls (69) which are arranged at a specific angular distance from one another and which enclose a suction chamber between them.

Abstract: The web-fed printing machine preferably intended for the printing of banknotes has two closely adjacent impression cylinders (2, 3), each of which interacts with several blanket cylinders (4, 6). Each blanket cylinder (4, 6) is inked by a plate cylinder (5, 7) which receives its ink from its own inking unit (9, 9'; 11, 11'). The paper web (P) runs between the respective impression cylinder (2, 3) and blanket cylinders (4, 6), partially looping first round one impression cylinder (2) and then in the opposite direction round the other impression cylinder (3), so that the two sides of the paper are successively printed directly with the individual colors. All the blanket and plate cylinders interacting with an impression cylinder (2, 3) are arranged on a respective common exchangeable machine stand (15, 16).

Abstract: The device has a transfer cylinder (2) with a drum (4) which is adjustable in the circumferential direction relative to its shaft (3) and which carries sheet grippers (8) with a front stop (8a) for the sheets (B). The diameter of the transfer drum (2) is equal to 1/N of the diameter of the plate cylinder which carries N printing plates. The shaft (3) of the transfer cylinder (2) rotates at a constant speed and executes N revolutions when the plate cylinder is executing one revolution. By means of a controllable setting device, the drum (4) is so displaced relative to the shaft (3) during each revolution that the front stop (8a), when its transfer position in which a sheet is transferred to the impression cylinder (D) is passed, assumes a position by which the exact register of this sheet in relation to the position of the printing plate printing it on the plate cylinder is set.

Abstract: The rotary web-fed printing machine has three successively arranged printing units, namely one offset and two intaglio printing units which are all of a similar design to sheet-fed printing units and in which the cylinders (2, 3) forming the printing nip have a plurality of sectors separated by cylinder pits (2a, 3b). Each printing unit has, in front of the printing nip, a first paper-web store (29) and an intermittently controllable first draw-roller unit (30) and, after the printing nip, an intermittently controllable second draw-roller unit (31) and second paper-web store (32), the draw-roller units (30, 31) which have only one suction roller being controllable for the forward and backward movement of the web (P) by means of individually regulated drives (30a, 31a) and at the same time serving for the register check.

Abstract: The printing machine is composed of an indirectly printing printing unit (A), and a sheet transport device (B), composed solely of drums (18, 19, 20, 22, 23, 24), and of a following intaglio printing unit (C). The indirectly printing printing unit (A) has two interacting blanket cylinders (3, 5), each of which is inked with several colors by several plate cylinders (12, 15; 7, 10). The sheets are passed onto one of the blanket cylinders (3) from a carry-over drum (2) and, after passing through the nip between two blanket cylinders (3, 5), thereby being printed on both sides, are taken over by a transfer drum (18) of the sheet transport device. The circumferential region which is located between the carry-over drum (2) and transfer drum (8) and over which the sheet passes extends over at most 180.degree., preferably less than 150.degree., so that that free circumferential region of this blanket cylinder not covered by the sheet is available for accommodating several plate cylinders.

Abstract: The printing machine is composed of two essentially identically constructed halves which each have an impression cylinder (4, 14), an image transfer cylinder (6, 16) resting against this, a blanket cylinder (7, 17) and a collect-printing plate cylinder (5, 15). In the offset-printing position, the blanket cylinder (7, 17) rests against the impression cylinder (4, 14) and is inked by offset plate cylinders, while the collect-printing plate cylinder (5, 15) is inoperative. In the collect-printing position, the blanket cylinder (7, 17) is moved away from the impression cylinder (4, 14), is inked by color selector cylinders (8, 18) and itself inks the collect-printing plate cylinder (5, 15) which rests against the image transfer cylinder (6, 16). Moreover, in both printing positions, the image transfer cylinder (6, 16) is inked by the plate cylinder (10, 20) of an additional single-color printing unit.

Abstract: The printing machine has two interacting blanket cylinders (4, 14), between which the paper to be printed runs through, thereby being printed on both sides, two plate cylinders (5, 15), each of which carries a collect-printing plate and is in contact with one of the blanket cylinders, and two color-collecting cylinders (6, 16) which are arranged at a distance from one another and each of which is in contact with a plate cylinder (5, 15) and with several color selector cylinders (8, 18), each inked by an inking unit (9, 19). Moreover, the two blanket cylinders (4, 14) are each in contact with the plate cylinder (10, 20) of an additional printing unit which is a wet offset-printing unit working with a dampened intaglio printing plate.

Abstract: The printing machine has two multi-color printing units (I, II) of essentially identical construction, each composed of a first blanket cylinder (4, 14), of a second blanket cylinder (7, 17), of a plate cylinder (5, 15) and of an image transfer cylinder (6, 16). In the offset-printing position, the second blanket cylinder (7, 17) inked by offset plate cylinders (8) rests against the first blanket cylinder (4, 14), while in the collect-printing position it is moved away from this and inked by color selector cylinders. In the collect-printing position, the plate cylinder (5, 15) carries a collect-printing plate, of which the image inked by the first cylinder (7, 17) is transferred to the first blanket cylinder (4, 14) via the image transfer cylinder (6, 16). In the offset-printing position, the plate cylinder is inoperative.

Abstract: A rotatable sheet brake roller, whose peripheral speed is varied in response to the speed of a printed sheet transport means, is disclosed. Initially, the sheet brake roller runs at a peripheral speed generally the same as the sheet transport speed. Once the sheet is released from its transport, the sheet brake roller decelerates to slow the sheet to a sheet delivery speed. A dampening unit is associated with the sheet brake roller which has a surface that repels printing ink. The dampening unit removes ink particles from the surface of the sheet brake roller to eliminate smearing which would otherwise occur, particularly in recto and verso printing when a freshly printed surface of the printed sheet contacts the surface of the sheet brake roller.

Abstract: The printing machine has two interacting blanket cylinders (1,2) which are each inked by several offset plate cylinders (5,12) and between which the paper (P) to be printed on both sides runs through. One of the blanket cylinders (2) is also in contact with a plate cylinder (8) carrying a collect printing plate which is inked in a multicolor manner by a further blanket cylinder (9). This blanket cylinder (9) receives the inks from several appropriately inked selective color inking cylinders (10). Also arranged between the two blanket cylinders (2,9), which are in contact with the plate cylinder (8) carrying the collect printing plate, is an adjustable and convertible plate cylinder (16) which, in a first working position, carries an offset plate and rests against the blanket cylinder (2) inked by the offset plate cylinders (12), whilst in a second working position it carries a selective color inking plate and rests against the blanket cylinder (9) inked by the selective color inking cylinders (10).

Abstract: The machine can print on both sides of the paper either an image with juxtaposed colors by means of a typographic plate inked respectively by an ink collecting cylinder inked in turn by selective color inking cylinders of which the number corresponds to the number of colors, or an image with superposed colors and designs by means of plate cylinders substituted for the selective color inking cylinders and provided with printing plates inking a respective offset cylinder and of which the number corresponds to the number of colors and designs, or an image of each type aforesaid. For this purpose the machine comprises two blanket cylinders operating either as collecting cylinders spaced from each other, each in contact with a cylinder carrying said typographic plate of which the image is transferred via another blanket cylinder to the paper surface, or as offset cylinders pressed against, and printing, the paper, or one as a collecting cylinder and the other as an offset cylinder, both separated.

Abstract: The plate cylinder is provided with at least one groove opening out at the cylinder periphery, and disposed therein a fastening device for the two plate ends extending into the groove. This fastening device consists of a tightening bar which can be tilted about an axis parallel to the cylinder axis by means of hydraulically actuatable pistons provided in one groove boundary wall, a clamping piece, and a tightening support. The two plate ends are introduced on both sides of the clamping piece and, when the tightening bar is tilted by the action of the piston, are wedged tight between tightening bar and clamping piece or clamping piece and groove boundary wall, simultaneously tightening the printing plate. The tightening support can be forced radially outwards for the purpose of wedging the tightening bar in its position tightening the plates. The fastening device requires a groove of only small width which moreover tapers radially outwards, forming only a narrow circumferential gap.

Abstract: An offset inking unit for a rotary printing machine is disclosed. A single supply of ink, carried from an ink fountain through a distribution train that includes serially placed synthetic material coated ink receiving rollers and rubber coated ink intermediate rollers, is split by a distributing roller onto first and second ink forme rollers. The second ink forme roller has three subsequent ink forme rollers linked to it in a serial manner through rider rollers. Ink tack or stickiness is controlled to avoid ghosting by applying dampening fluid to either the first or last of the ink forme rollers or to both, if desired.

Abstract: The printing machine has a multi-color offset printing unit, behind this a sheet conveying device, and an intaglio printing unit to which the sheets printed and provided with register marks in the first printing unit are transferred by the conveying device. The conveying device comprises a detector system responding to these register marks, and a register drum. Each of the two printing units and the register drum have their own drive mechanisms mechanically independent of each other. The drive mechanism for the second printing unit is controlled in dependence upon the speed of the first printing unit, and the drive mechanism for the register drum is controlled on the one hand in dependence upon the speed of the second printing unit and on the other hand in dependence upon the register deviation measured in the circumferential direction. Further, on the register drum are disposed devices for correcting side register and any skew of a sheet in dependence upon the measured register deviations.

Abstract: A convertible, multicolor, printing press for printing the safety background of banknotes or the like comprises, in one configuration, an impression cylinder, a second blanket cylinder which engages the impression cylinder, a first plate cylinder which engages the second blanket cylinder and also engages a first blanket cylinder which first blanket cylinder is spaced from the impression cylinder, and several sectioned inking rollers which engage the first blanket cylinder and which are each inked by inking devices of different colors. The printing press is converted to a second configuration by exchanging the sectioned inking rollers for second plate cylinders, separating the first plate and second blanket cylinders from engagement with the first blanket (11-14) and impression cylinders respectively, and moving the impression cylinder to directly engage the first blanket cylinder.

Abstract: A collect-printing unit for security printing in offset printing for use in a rotary printing press, provided with a blanket cylinder to which a plurality of cut-out offset rollers are coordinated, is disclosed. Two ink transfer cylinders and one forme cylinder, on whose periphery a plurality of offset printing formes are fixed, are coordinated to this blanket cylinder. Another blanket cylinder is coordinated to the forme cylinder, this blanket cylinder taking the multi-color motif to be printed from the forme cylinder and transferring it onto the support to be printed. A counter pressure cylinder may cooperate with this blanket cylinder. A sheet-shaped or web-shaped support to be printed is interposed between the blanket cylinder and the counter pressure cylinder and is printed in offset collect-printing.

Abstract: A collect-printing unit for security printing in dry-offset printing for use in a rotary printing press, provided with a blanket cylinder, to which a plurality of hard cut-out inking rollers are coordinated is disclosed. To this blanket cylinder, two ink transfer cylinders and one forme cylinder, on whose periphery several letterpress formes are fixed, are coordinated. Furthermore, one blanket cylinder is coordinated to the forme cylinder, this blanket cylinder receiving the multi-color motif from the forme cylinder and transferring it onto the support to be printed. A counter-pressure cylinder cooperates with this blanket cylinder. A sheet-shaped or web-shaped support to be printed, is interposed between the blanket cylinder and the counter-pressure cylinder, and is printed in collect-printing.