De La Rue Giori S.a.

Koenig & Bauer-aktiengesellschaft

Other

De La Rue Giorgi S.a.

Albrecht J Germann

Johannes Georg Schaede

Joachim A Lapp

Erich G Wieland

Hartmut Karl Sauer

Gualtiero Giori

Hans-Bernhard Bolza-Schunemann

Claus A Bolza-Schunemann

Reinwald Mitsam

Jurgen F Munker

Hans B Bolza-Schunemann

Described are a process and an apparatus for transferring prints (,) from a support (,) on to a substrate (,), wherein the support (,) is transported together with the substrate (,) through a station in which the substrate (,) having print portions (,) in succession in the direction of transportation movement is provided with the prints (,) in accurate register relationship. This procedure uses on the one hand a substrate (,) having at least two rows of print portions (,) side-by-side transversely to the direction of transportation movement and on the other hand a support (,) which in the direction of transportation movement has between the prints (,) for print portions (,) disposed in a row one after the other in the direction of transportation movement at least one respective additional print (,). According to the invention there are provided means, by means of which only certain prints (,) can be respectively transferred selectively fron the support (,) on to the substrate (,) in the station. After leaving the station the support (,) is released frmm the substrate (,) and according to the number of additional prints (,) provided between two prints (,) for print portions (,) occurring in succession in the direction of transportation movement, fed at least one further time to the station, in which case the support (,) is displaced laterally by the transverse spacing between the adjacent rows of print portions and in the direction of transportation movement approximately by the spacing between directly successive prints (,).

Process and apparatus for transferring prints from a support on to a substrate

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).

Device for transferring single sheets to the impression cylinder of a

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.

Method for judging printing sheets

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.

Intaglio printing machine with direct and color-collect inking

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. The roller casing is mounted on the bearing journal (66) a conical connecting flange (61b) fastened directly to the rotor shaft of the drive motor and is mounted with its other end on the connection piece (68b), the gaps between roller casing and partition walls (69) being approximately airtight. Instead of a suction roller, a draw roller subjected to compressed air on the outside along the circumferential portion can also be provided, or else the suction-air and compressed-air effects are combined.

Draw-roller unit for a web-printing machine

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). Consequently, in order to exchange the blanket and plate cylinders for cylinders of a different diameter for the purpose of changing the printing format, the machine stands (15, 16) equipped with corresponding cylinders are exchanged as a whole.

Web-fed printing machine for recto-verso printing especially of banknotes

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. This guarantees that the width of the front margin between the sheet front edge and print start is of the same size on all the printed sheets, without the need to adjust the printing plates exactly on the plate cylinder in a time-consuming way.

Device for transferring individual sheets to the impression cylinder of

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. In front of the first paper-web store (29) of the first printing unit (A), between the printing units within the portions limited by the respective paper-web stores and behind the second paper-web store of the last printing unit, the web (P) is moved uniformly by continuously driven draw-roller arrangements (27), whereas during the run through the printing nip the paper-web transport takes place in the pilgrim-step mode.

Combined rotary web-fed printing machine, especially for the printing of

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.

Combined sheet-fed rotary printing machine for securities, especially

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. The paper first loops partially round the impression cylinder (4) of the first machine half and is thereby printed directly on one side by the image transfer cylinder (6) and, in the offset-printing position, also by the blanket cylinder (7) and then loops partially round the impression cylinder (14) of the second machine half, the other side of the paper being printed in a similar way.

Convertible multi-color printing machine for the rectoverso printing of

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. Thus, in one printing operation, banknotes can be produced, on the one hand, with a multi-color safety background according to the collect-printing process and, on the other hand, each with a single-color main design according to the wet offset-printing process, and furthermore the said intaglio printing plates can also have an additional background which is superposed on the multi-color background according to the collect-printing process.

Multi-color rotary printing machine for simultaneous recto-verso printing

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. Furthermore, in the two printing positions, the image transfer cylinder (6, 16) interacts with the plate cylinder (10, 20) of an additional single-color printing unit, the image of which is likewise transferred to the first blanket cylinder (4, 14). The paper runs between the first blanket cylinders (4, 14), pressed against one another, of the two printing units and receives a simultaneous recto-verso print. The plate cylinder can also rest against the first blanket cylinder and in the offset-printing position, with the image transfer cylinder moved away, belong to the additional single-color printing unit.

Convertible multi-color printing machine, especially for the printing of

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.

Sheet brake and delivery assembly

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). Thus, it is possible to produce on one side of the paper a multicolor pattern which is made by means of two different printing processes and in which either the number of colors used in collect printing or the number of colors used in offset printing is selectively increased by one color.

Rotary multicolor printing machine for simultaneous recto-verso printing

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. In the last case the image on the offset cylinder is transferred via a transfer cylinder substituted for the cylinder carrying the typographic plate to said blanket cylinder.

Growing community of inventors

Wurzburg, Germany

Albrecht J Germann