EP2353864A1 - Colour deck and printing unit of a printer - Google Patents

Abstract

The unit (3) has two color application rollers (12.1, 12.2) engaged at form cylinders (2) and supplying colors by a central roller (13). The central roller co-acts with a ductor roller (14) in an upstream manner for formation of a paint film over a gap (18). The ductor roller co-acts with a color dosing system (11) i.e. color box, which is zonally adjustable regarding to color amount. The central roller has a structured outer surface and is designed as a raster or film roller. The central roller is designed without contact to a squeegee device that wipes out the color. An independent claim is also included for a printing unit that comprises dual printing devices.

Description

The invention relates to inking units and a printing unit of a printing press according to the preamble of claim 1 or 4 or 14.

By the WO 2005/097504 A2 is a printing unit with four stacked double printing units known, the four printing cylinders lie in a version with their centers in a same plane. In one embodiment of the printing unit, the printing units are designed for waterless offset printing and have inking modules designed as short inking units, ink being applied by a central roller designed as an anilox roller via two applicator rollers. In addition, the central screen roller cooperates with two other rollers, which in turn cooperates via an iridescent friction roller with the adjacent inking roller. The anilox roller of the short inking unit receives the ink from an inking device, in particular a chamber doctor blade, or else via a compactor, which is not described in more detail, from an ink fountain. In another embodiment, the inking unit is formed as a roller inking unit and has downstream of the ink fountain roller in series with a ductor roller, a film roll, a transfer roller, a first Reibzylinder, another transfer roller and a second distribution cylinder, before the color of the latter in parallel over two Application rollers is applied to the form cylinder. In a third embodiment of the inking unit this is designed as a two-pass roller inking unit, wherein the compactor divides from the ink fountain on the second distribution cylinder divides and each branch leads over further rollers to two applicator rollers.

By the WO 2005/108081 A1 is a section of an inking unit for a printing machine for supplying and metering the ink disclosed, wherein a Farbduktor is rotationally driven, so that its outer circumference passes the reservoir of ink over, whereby a color layer of certain layer thickness forms on the ductor roller. From the ductor roller, the ink is subsequently removed by means of a film roller and conveyed further in the direction of the printing zone of the printing press. For zonal individual dosage of ink to be transferred by the inking unit is a metering device of several juxtaposed color blades. The respective colorimeter is adjustably mounted, so that the ink fountain opening between the front edge of the colorimeter and the outer circumference of the ductor roller can be changed.

The DE 38 18 339 A1 relates to an inking unit for printing machines, in particular for the upper ink supply of double printing units, with a clean ink guide and exact dosage secured, while maintaining the characteristics of a short inking unit. For this purpose, a form cylinder two inking rollers and a co-operating therewith an anilox roller are arranged. The anilox roller forms a gap together with an ink feed roller (ductor roller). For pre-metering, the ink feed roller cooperates with a color meter of a color box, while additionally a color space is formed for the metering between the ink feed roller, the anilox roller and a squeegee doctor blade.

The EP 0 752 311 A2 discloses an inking unit of a printing machine, wherein from a zonal adjustable ink fountain color is transmitted through a ductor roller via a gap to a central roller, and from there via two applicator rollers to the forme cylinder. On the central roller is optionally a squeegee and switched off. In a further development, an additional rider roll can be provided on the circumference of the central roll, with which a further rider roll acts together. The central roller here has a structuring with a line density of 80 to 200 lines / cm. By the US 5,709,147 A Printing unit is disclosed with a color and a dampening unit, wherein ink is transported from a paint box and a ink fountain roller via a first and a second intermediate roller to a central roller, from which it is transferred via two applicator rollers to the forme cylinder. To the central roller for metering the amount of ink a doctor device can be adjusted. The central roller has a textured surface with z. B. a density of 80 to 200 lines / cm.

The EP 0 956 973 A2 relates to a printing machine with replaceable plate cylinder and an inking unit, the rollers can be adjusted to make it to plate cylinders of different diameters can. In the inking unit, the ink is transferred from a ductor roller via a metering roller to a central primary roller, from which it is transported via two compactors, each with a transfer roller, a rubbing roller and an applicator roller to the forme cylinder.

The US 2 466 603 relates to a direct printing unit, wherein a plurality of forme cylinders are adjustable to a counter-pressure cylinder. The ink is transferred from an ink fountain from a ink fountain roller via two ductor rollers to a central roller, from which the ink is delivered to the forme cylinder via two compactors each containing a transfer roller, a rubbing roller and two parallel applicator rollers.

The EP 1 543 969 A1 discloses a typical short inking unit with an anilox roller, which ink is supplied directly via an employed chamber doctor blade. The amount of ink is adjusted in such, not zonally metered inking units on the temperature.

The invention has for its object to provide an improved inking unit of a printing press and a printing unit having the inking unit.

The object is achieved by the features of claim 1 or 4 or 14.

The achievable with the present invention consist in particular in that the inking is particularly space-saving, and yet zonal adjustable in terms of the amount of color, and the high demands on a good trituration is made fair.

Through the Farbdosiersystem with zonal individually adjustable ink supply in combination with a multiple color decrease z. B. already on the roller following the duct roller, the inking can be made extremely short and yet zonally adjustable. Of particular advantage branch off at this (central) roller from two compactors, each having at least one changeable roller. Due to the branch in the region of a cylinder side facing away from the forme cylinder side of the central roller color splitting in a plurality of nips is despite the shortest construction possible.

An equipped with such inking units printing unit can be made extremely compact. This can be advantageously further increased by the fact that the printing unit is designed to be divisible.

Embodiments of the invention are illustrated in the drawings and will be described in more detail below.

Fig. 1

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer ersten Ausführungsvariante eines zweiten Beispiels;

Fig. 2

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer zweiten Ausführungsvariante eines zweiten Beispiels;

Fig. 3

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer dritten Ausführungsvariante bzw. einer gemischten Betriebsweise aus der ersten und zweiten Ausführungsvariante des zweiten Ausführungsbeispiels;

Fig. 4

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer ersten Ausführungsvariante eines dritten Beispiels;

Fig. 5

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer zweiten Ausführungsvariante eines dritten Beispiels;

Fig. 6

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer dritten Ausführungsvariante eines dritten Beispiels;

Fig. 7

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer vierten Ausführungsvariante eines dritten Beispiels;

Fig. 8

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer fünften Ausführungsvariante eines dritten Beispiels;

Fig. 9

ein als Offsetdruckwerk ausgebildetes Druckwerk einer Druckmaschine in einer sechsten Ausführungsvariante eines dritten Beispiels;

Fig. 10

eine Ausführung einer Druckeinheit, insbesondere als teilbare Druckeinheit;

Fig. 11

eine Ausführung einer teilbaren Druckeinheit in offener Stellung.

Show it:

Fig. 1

a printing unit of a printing machine designed as an offset printing unit in a first embodiment of a second example;

Fig. 2

a printing unit designed as an offset printing unit of a printing press in a second embodiment of a second example;

Fig. 3

a printing unit designed as an offset printing unit of a printing press in a third embodiment or a mixed mode of operation of the first and second embodiment of the second embodiment;

Fig. 4

a printing unit designed as an offset printing unit of a printing press in a first embodiment of a third example;

Fig. 5

a printing unit designed as an offset printing unit of a printing press in a second embodiment of a third example;

Fig. 6

a printing unit designed as an offset printing unit of a printing press in a third embodiment of a third example;

Fig. 7

a trained as an offset printing unit printing unit of a printing press in a fourth embodiment of a third example;

Fig. 8

a printing unit designed as an offset printing unit of a printing press in a fifth embodiment of a third example;

Fig. 9

a printing unit designed as an offset printing unit of a printing machine in a sixth embodiment of a third example;

Fig. 10

an embodiment of a printing unit, in particular as a separable printing unit;

Fig. 11

an embodiment of a separable pressure unit in the open position.

A printing unit 01 of a printing press, in particular a newspaper printing press, has at least one first printing cylinder 02, for. B. a at least one printing plate-carrying forme cylinder 02 and a printing forme on the forme cylinder 02nd inking unit 03 (see eg Fig. 1 ). In principle, in addition to the inking unit 03, the printing forme wetting with moistening dampening be provided, but this is designed as an offset printing unit 01 printing unit 01 preferably as a dry offset printing unit 01, ie formed without dampening unit or without means for separate dampening solution.

The printing forme of the forme cylinder 02 can basically be embodied in the manner of an engraving in the lateral surface or as a printing form detachably arranged on the lateral surface in the manner of a plate-like elevator or a sleeve having the print image original (in the high-pressure, intaglio or planographic printing process). However, the at least one printing form on the forme cylinder 02 is preferably designed here as a planographic printing plate, in particular as a planographic printing plate designed for use in waterless offset printing. In a preferred embodiment, at least one of the printing cylinder 02; 06, in particular at least the forme cylinder 02, designed to be tempered. For this purpose, at least one of the printing cylinder 02; 06, in particular at least the forme cylinder 02, associated with a temperature control device, not shown, through which the temperature of the cylinder jacket and / or located on the cylinder jacket ink is indirectly or directly tempered. For this purpose, the forme cylinder 02 is preferably designed to be permeable to a tempering fluid, which is fed to the forme cylinder 02, for example, from a suitable tempering device.

The ink applied by the inking unit 03 on the printing plate (s) of the forme cylinder 02 according to the print image original ink can then in a direct printing directly from the forme cylinder 02 to a substrate 04, z. B. a paper web 04 (short: web 04) are delivered. Preferably, however, it is delivered here in the indirect planographic printing process, ie in offset printing, via a printing cylinder 06 designed as a transfer cylinder 06 in the region of a printing location 07 to the printing substrate 04. The substrate 04 can basically as well in a Sheet-fed press to be printed to be printed sheet.

The printing location 07 is preferably formed as a printing gap 07 with a further printing unit cylinder 08, which serves as an abutment for the transfer cylinder 06 via the printing material 04 to be printed. This third printing cylinder 08 can run as a pure, no ink leading impression cylinder, but advantageously as a second, ink-carrying transfer cylinder 08 of a second printing unit 09 with a second designed as a forme cylinder 10 printing cylinder 10. This forms with the first printing unit 01 at each other on the substrate 04 employed transfer cylinders 06; 08 as a double pressure point 07 for the simultaneous two-sided printing trained pressure point 07 (see, eg. Fig. 10 ). In an advantageous embodiment, the centers of the two printing couple cylinders 02 are in the print-on position; 06 of the printing unit 01 and the third printing cylinder 08, in the embodiment with double pressure point 07, the centers of all four printing cylinder 02; 06; 08; 10, in a common plane E (see eg Fig. 10 ).

The inking unit 03 has the input side, d. H. Formzylinderfern a Farbdosiersystem 11, through which the ink is metered into the inking unit 03 dosed at least in terms of their amount. In the present inking unit 03, the ink metering system 11 should preferably be designed as a continuous inking system. Between Farbdosiersystem 11 and forme cylinder 02 a depending on the type of inking different pronounced compactor is provided by which the registered ink "triturated", d. H. is as uniform as possible on the roll circumferences. The tendency is to increase with the number of rolls, i. H. the color splitting, the quality of the trituration, the flexibility in setting and the capacity of inked and evened ink stored in the inking unit 03, but at the same time leads to increased space requirements and high costs.

The inking unit 03 described below in examples saves space and costs, However, at the same time formed with a high quality in the trituration and an optimal flexibility with regard to the controllability of the color input.

The inking unit 03 has (at least) two rotatably mounted rollers 12.1; 12.2, z. B. inking rollers 12.1; 12.2, on, by which employed in the form of cylinder 02 state ink is applied to the printing form. With regard to an order of passage of a form cylinder point through the adjacent Nippstellen the inking rollers 12.1; 12.2 also be referred to as the front inking roller 12.1 and 12.2 rear inking roller. These two inking rollers 12.1; 12.2 receive the ink directly and / or indirectly from a central roller 13, which the ink from an upstream of the inking unit 03 provided further roller 14, z. Example, a ductor roller 14, which in turn upstream indirectly or preferably directly supplied by the ink metering system 11 with ink. In principle, the central roller 13 can be supplied with ink by means of a vibrating roller (not shown) oscillating between the ductor roller 14 and the central roller 13 or by means of one or more further rollers arranged between the central roller 13 and the ductor roller 14.

However, preference is given to a continuous, preferably direct ink transfer from the ductor roller 14 to the central roller 13 in that it is permanently in contact with a color film applied to the ductor roller 14. Preferably, the central roller 14 rotates approximately (eg a maximum of ± 2% deviation) with the peripheral speed of the printing cylinder 02; 06 and the ductor roller 14 with one of these significantly different, in particular significantly lower (eg, at least a factor of 2 lower in production) peripheral speed. Due to the difference in the peripheral speed ink is permanently removed from the ink jet of the ductor roller 14 by the central roller 13. The centers of the central roller 13 and the ductor roller 14 are preferably mounted so spaced apart, so that between the color-free lateral surfaces a gap 18, z. B. a gap 18th a width of 0.03 to 0.08 mm, remains. This is large enough that the bare lateral surfaces are not in contact, but small enough that through the central roller 13 printing ink can be removed from the inked Ductor roller 14. The column 18 is preferably adjustable in width by at least one of the two rollers 13; 14, z. B. the roller 14, on the frame in a direction with at least one perpendicular to its axial component is movable. So that the roller 13 can safely remove sufficient ink from the ink film of the ductor roller 14, it is preferably with a structured lateral surface, for. B. in the manner of a film roller 13 or possibly also formed in a suitable type of an anilox roller.

In an advantageous embodiment, the width of the gap 18 is adjustable by z. B. the Ducktorwalze 14 (possibly together with components of the ink metering system 11) and / or the central roller 13 (possibly together with other components of the compactor) is mounted movable relative to each other at a distance or are. In one embodiment, this example, the central roller 13 is movable, in particular z. B. adjustable in eccentric bearings, stored. In another advantageous embodiment, for. B. the ductor roller 14 and possibly the ink metering system 11 movably mounted. For this purpose, for example, ductor roller 14 and ink dosing system 11 are arranged on a common, movably mounted frame part. With regard to the axial direction of the central roller 13, it is preferably fixed to the frame in all variants, ie. H. for example, not changeable, stored.

Preferably, the ductor roller 14 with respect to its rotation by a mechanically independent of the central roller 13 motor 16 - z. B. directly or via a transmission (eg., A gear transmission or a belt drive) - forcibly driven. The drive takes place in the above-mentioned manner adjustable roller 13 z. B. via an angle and / or offset compensating coupling or via a balance shaft. Motors or drive motors are indicated in the figures by the corresponding quadrant filled circle symbol. Preferably, the engine 16 and thus the speed of the Ductor roller 14 formed variable. As a result, the quantity of ink to be transferred from the ductor roller 14 to the central roller 13 is variable and thus adjustable. The storage of the ductor roller 14 is advantageously within a clearance of the printing cylinder 02; 06; 08; Provided 10 frontally supporting frame walls, ie in each case on the inside of the respective frame escape.

Preferably, the ink fountain roller 14, the ink supplying color inking system 11 is designed zonal adjustable with respect to the ink to be entered. Here are several across the width of the inking unit 03 adjacent sections, z. B. zones, independently of each other with respect to the introduced or introduced color quantity adjustable. For this purpose, the ink metering system 11 has an adjustable metering device 17 in sections. The metering device 17 may include the zones associated with line openings of a Pumpfarbwerkes, the Farbauslassmengen for pipe openings of different zones individually z. B. via valves or individual pumps is adjustable. In the preferred embodiment set forth here, the ink metering system 11 is designed as a so-called ink fountain 11 and comprises as metering device 17 juxtaposed across the width of the inking unit 03 a number of color blades 17 or color slices obtained by slitting a wider blade - which is also under the meaning of "several Color knife "should fall. These color blades 17 (or tongues) are each individually adjustable by means not shown and explained in their distance from the lateral surface of the ductor roller 14. Preferably, the adjusting means are actuated by a control and / or regulating device of the printing press and / or a control station ferbetätigt controllable. Depending on the distance set, a color layer of greater or lesser thickness can pass from the ink reservoir of the ink fountain 11 through the gap formed between the ink knife 17 and the lateral surface and be introduced into the compactor of the inking unit 03. By individually adjustable color meter 17 (or tongues) can thus zonal, ie sections over the effective width of the inking unit 03 and the Farbdosiersystems 11, the amount of ink to be entered are set. The Recording for the ink fountain 11 is advantageously within a clearance of the printing cylinder 02; 06; 08; Provided 10 frontally supporting frame walls, ie in each case on the inside of the respective frame escape.

In a first, simplest embodiment of the extremely short, but preferably zonally adjustable inking unit 03, this z. B. two inking rollers 12.1; 12.2, a z. B. with structured lateral surface running central roller 13, a co-operating through a gap 18 ductor roller 14 and a preferably zonal adjustable Farbdosiersystem 11. In this embodiment, the inking unit 03 has a shortest ink path from the ink metering system 11 via a ductor roller 14, via a central roller 13 arranged with a small gap 18, to an inking roller 12.1 in contact with the latter in this example. 12.2, and from there on the forme cylinder 02 on. In this simplest embodiment, the two inking rollers 12.1; 12.2 employed both to the forme cylinder 02 and to the roller 13. Of the cooperating with the ductor roller 14 via a gap 18 central roller 13 is here so ink with respect to the ink stream downstream at two circumferentially spaced locations by the rollers 12.1; 12.2 accepted.

The central roller 13 is preferably driven for all examples, medium or direct rotationally. For this purpose, it can on the pin via a mechanical drive connection of one of the printing cylinder 02; 06 forth, or preferably by a drive motor 19 mechanically independent of the printing cylinder 02; 06 be rotationally forced.

In a second embodiment of the inking unit 03 which is more advantageous in terms of trituration and equalization, however, at least one further roller 21.1 is provided in the inking unit 03; 21.2 (eg take-off roll 21.1; 21.2), which cooperates with the central roll 13 downstream. This in turn acts downstream with another roller 22.1; 22.2 (eg transfer and / or transfer roller 22.1; 22.2), and the latter with the circumference of the central roller 13 geometrically closest to the inking roller 12.1; 12.2 together.

Preferably, as shown, two such take-off rollers 21.1; 21.2, z. B. on both sides of a center of the forme cylinder 02 and the central roller 13 connecting plane Z, provided on the circumference of the central roller 13, which in each case via a transmission and / or Verreibewalze 22.1; 22.2 with the geometrically closest inking roller 12.1; 12.2 work together. At least the transfer and / or Verreibewalzen 22.1; 22.2 are preferably movable in the axial direction and mounted forcibly via a corresponding drive changierbar. The traversing drive is not shown here concretely, but can basically via a gear from the rotational movement of the roller 22.1; 22.2 are derived (cost-effective) or by a specially provided for this drive means (variable with respect. Frequency). In either case, the traversing motion is forced. This is done for example by a rotational movement of the roller 22.1; 22.2 or a motor rotor in an iridescent axial movement converting gear, z. B. via a co-rotating with a circumferential groove groove driver, via a swash plate, via a worm or a crank gear. The roller 22.1; 22.2 or the rollers 22.1; 22.2 are rotatory here only by friction with the take-off roller 21.1; 21.2 and / or the inking roller 12.1; 12.2 driven, but can also be further development by the drive motor 19 of the central roller 13, by a drive of the printing cylinder 02; 06 or even a specially provided drive motor be driven individually or in pairs rotationally forced. The take-off and the inking rollers 21.1; 21.2; 12.1; 12.2 are preferably rotationally driven only by friction. At least the take-off and inking rollers 21.1; 21.2; 12.1; 12.2 preferably have an elastic and / or compressible shell layer, for. B. containing an elastomer on. The lateral surface of the inking roller 12.1; 12.2 is preferably formed with a hardness in the range of 35-40 ° Shore A. The lateral surfaces of the central roller 13 and / or the

Transfer and / or Verreibewaltze 22.1; 22.2 are preferably formed with a hard, substantially unyielding lateral surface. The lateral surfaces (or possibly the entire roller body) of the transfer and / or Verreibewalze 22.1; 22.2 are for example made of a polyamide, for. B. from Rilsan, or from a metal, for. B. made of copper.

To a slip in the friction gear between form cylinder 02 and the inking rollers by z. B. to be able to influence varying depression of soft rolls, preferably no mechanical drive connection is provided between the inking unit 03 and at least the forme cylinder 02. For this purpose, the forme cylinder 02 is positively driven in rotation by a drive motor 23 which is mechanically independent of the inking unit 03 -directly or via a transmission. Transfer cylinder 06 and forme cylinder 02 of the printing unit 01 (09) can be driven in pairs by a common drive motor 23, or individually by a separate drive motor 23.

• In der ersten, besonders vorteilhaften Ausführungsvariante (siehe z. B. Fig. 1) stehen lediglich die beiden Abnahmewalzen 21.2; 21.2 in Berührkontakt mit der zentralen Walze 13, während die beiden Auftragwalzen 12.1; 12.2 ohne Berührung zur zentralen Walze 13 angeordnet sind. Von der mit der Duktorwalze 14 über einen Spalt 18 zusammen wirkenden, z. B. in der Art einer "Filmwalze" 13 wirksamen und/oder ausgebildeten (zentralen) Walze 13 wird auch hier Druckfarbe an zwei in Umfangsrichtung voneinander beabstandeten Stellen durch zwei im Farbwerk 03 stromabwärts zur zentralen Walze 13 angeordnete Walzen 21.1; 21.2 abgenommen. Hierbei erfolgt eine nach Auftrag durch die Duktorwalze 14 nachfolgende erste Farbabnahme durch eine Abnahmewalze 21.2, welche die Druckfarbe über eine Übertragungs- und/oder Verreibewalze 22.2 an die zusammen wirkende Farbauftragwalze 12.2 überträgt. Eine zweite Farbabnahme erfolgt über die andere Abnahmewalze 21.1, welche die Druckfarbe ebenfalls über eine die Druckfarbe vergleichmäßigende Übertragungs- und/oder Verreibewalze 22.1 an die zugeordnete Farbauftragwalze 12.1 überträgt. Das Farbwerk 03 arbeitet stromabwärts der zentralen Walze 13 somit zwar in der Art eines zweizügigen Walzenfarbwerks, jedoch teilen sich die beiden Zweige bzw. Walzenzüge an einer z. B. in Funktion einer Filmwalze 13 ausgebildeten, stromaufwärts mit einer Duktorwalze 14 zusammenwirkenden Walze 13.

Two variant embodiments of the inking unit 03 from the second exemplary embodiment are set out below:

• In the first, particularly advantageous embodiment variant (see, for example, FIG. Fig. 1 ) are only the two take-off rollers 21.2; 21.2 in touching contact with the central roller 13, while the two applicator rollers 12.1; 12.2 are arranged without contact with the central roller 13. Of the cooperating with the ductor roller 14 via a gap 18, z. B. in the manner of a "film roll" 13 effective and / or trained (central) roller 13 is here also ink at two circumferentially spaced locations by two in the inking unit 03 downstream of the central roller 13 arranged rollers 21.1; 21.2 accepted. Here, a subsequent order by the duct roller 14 subsequent first color decrease takes place by a take-off roller 21.2, which transmits the ink via a transfer and / or Verreibewalze 22.2 to the co-acting inking roller 12.2. A second color decrease takes place via the other removal roller 21.1, which likewise transfers the printing ink to the associated inking roller 12.1 via a transfer and / or transfer roller 22.1 which compares the printing ink. The inking unit 03 thus operates downstream of the central roller 13 thus indeed in the manner of a two-pass roller inking unit, however, the two branches or compactors share at a z. B. in function of a film roll 13, upstream with a ductor roller 14 cooperating roller 13th

In a second embodiment variant (see, for example, Fig. 2 ) are both the two take-off rollers 21.2; 21.2, as well as the two applicator rollers 12.1; 12.2 in touching contact with the central roller 13. Of the cooperating with the ductor roller 14 via a gap 18, z. B. in the manner of a "film roll" 13 effective and / or trained (central) roller 13 is here ink at four circumferentially spaced locations by downstream of the central roller 13 arranged rollers 12.1; 12.2; 21.1; 21.2 accepted. Here, a subsequent order by the duct roller 14 subsequent first color decrease takes place by a take-off roller 21.2, which transmits the ink via a transfer and / or Verreibewalze 22.2 to the co-acting inking roller 12.2. A second and a third color decrease takes place in each case directly through the respective inking roller 12.2; 12.1, and a fourth color decrease again via a take-off roller 21.1, which emits the ink again over a printing ink uniforming transfer and / or Verreibewalze 22.1 to the associated inking roller 12.1.

For the preceding examples, the roller 13 - in contrast to a z. B. in a conventional short or anilox inking with a squeegee co-operating anilox roller - in their training z. B. characterized in that it directly above the above gap 18 for ink absorption directly, ie without further intermediate roll (s), with a ductor roller 14 cooperates. Unlike one Function of an anilox roller, however, is not operatively connected to the ink dosing with a squeegee scraping off the excess ink. D. h., The central, preferably structured roller 13 is formed without touching contact to a printing ink decreasing doctor. The ink metering takes place here preferably only via the gap 19 and the ink fountain roller 14 upstream Farbdosiersystem 11th

As already stated above, the central roller 13 is preferably formed with a structured outer surface, so that they z. B. in function of a "film roll" 13 sufficient ink from the ductor roller 14 can decrease. In this case, the central, with the ductor roller 14 cooperating roller 13 may advantageously be constructed in the manner of a film roller 13, but in principle also in the manner of a conventional anilox roller 13, whose structure z. B. is given by a regular structure of wells or Haschuren on the lateral surface. In the present application and function but then no squeegee to the z. B. operated in the manner of a film roller 13 anilox roller 13 and / or provided. The structuring on the lateral surface should be such that viewed along at least one direction on the lateral surface, which may extend in the axial, circumferential or in a direction lying between the axial and circumferential direction, in the middle z. B. at least 0.5 wells per cm, advantageously at least one depression per cm are provided ("fineness" of structuring). A so-defined "fineness" of the structure on the roller 13 can basically be between one recess and 50 recesses per cm, whereby a distinction can be made between a coarse, a fine and a middle region. For example, an area for coarse patterning may be formed in 0.5 to 15 wells per cm and an area for fine patterning in e.g. B. 30 to 80, z. B. greater than 30, advantageously at least 35, and less than 80, advantageously at most 75, recesses per cm are seen. A bordering the fine and coarse area overlapping middle area is z. B. in 5 to 50, in particular 10 to 45 wells per cm. The central area thus includes anilox rolls of offset printing with a coarser structure and film rolls with a particularly fine structure.

Depending on the version of the inking unit 03 in one of the o. G. Examples, it may be of particular advantage to form the roller 13 with a finer or coarser structure.

In the embodiment according to the first exemplary embodiment and the second variant of the second exemplary embodiment, it may be advantageous to use the roller 13 (eg in the manner of an anilox roller 13 with cups or hashes) with a structuring in the region of the fine structuring, in particular z. B. in the overlapping of the fine and medium structuring provided. In the first variant of the second embodiment, it may be advantageous to provide the roller 13 (eg in the manner of an anilox roller 13 or film roller 13) with structuring located in the central area. Here, the roller 13 is then z. B. as a "coarse screen roller" or a "fine film roller" executed.

In a further development, the inking unit 03 is designed such that it can optionally be switched between an operation according to the first and the second embodiment of the second example. For this purpose, z. B. at least one of the inking rollers 12.1; 12.2 or z. B. both (or all) inking rollers 12.1; 12.2 (and, if appropriate, together with this or these the associated rollers 22.1, 22.2 and / or rollers 21.1, 21.2) be movably mounted between the two corresponding positions. Then can be switched or selected as needed between a setting with an increased number of nips or a setting while avoiding too short color path.

Thus, in an advantageous third embodiment of the inking unit of the second embodiment, one of the application rollers 12.1; 12.2, preferably in the direction of rotation of the central roller 13 after the nip with the ductor roller 14 next Application roller 12.2, according to the principle Fig. 1 be arranged without direct contact with the central roller 13, while at least one other applicator roller 12.1; 12.2 according to the principle Fig. 2 both in contact with the forme cylinder 02 and the central roller 13 ( Fig. 3 ). That too Fig. 1 and 2 otherwise stated in each case to supplement this applies accordingly. In a further development, at least the application roller 12.2, which is not in contact with the central roller 13 in this embodiment, is movably mounted in the inking unit 01, so that it can be engaged with the forme cylinder 02 and the central roller 13 simultaneously in a different mode of operation. The contact with the further roller 22.1; 22.2 is preferably given in both operating situations. This is a direct ink path from the ductor roller 14 via the central roller directly to the applicator roller 12.2 and from there to the forme cylinder 02 at least for one of the applicator rollers 12.1; 12.2 preventable. This preferably applies to the last applicator roller 12.2 in the direction of rotation with respect to the forme cylinder 02 before the nip position with the transfer cylinder 06. In this case, the danger is particularly great that possibly a still visible pattern from the structured surface of the central roller 13 without being smoothed again reflected on the forme cylinder 02 and the printing plates.

In a highly adaptable design, the applicator rollers 12.1; 12.2 stored such that in an operating position two applicator rollers 12.1; 12.2 are in contact with the forme cylinder 02, but not in direct contact with the central roller 13, in the second operating situation an applicator roller 12.1; 12.2 is in contact with forme cylinder 02 and directly to the central roller 13 and another applicator roller 12.1; 12.2 to the forme cylinder 02, but not directly to the central roller 13, and in the third mode of operation two or all applicator rollers 12.1; Although 12.2 are in contact with the forme cylinder 02, but not directly to the central roller 13.

In a third embodiment (see eg. Fig. 4 and 5 ), the central roller 13 does not interact directly with the ductor roller 14. Ducktorwalze 14 and central roller 13 are spaced apart so far that no direct ink transfer takes place. The ductor roller 14 transmits the ink here via a gap 18 'on an additionally arranged roller 31, z. B. Filmwalze 31, which in turn the ink downstream on one of the central roller 13 arranged rollers 21.1; 21.2, in particular with respect to their center further than the central roller 13 spaced roller 21.1; 21.2 (see above) transmits. In principle, the rollers 21.1; 21.2; 22.1; 22.2; 12.1; 12.2 be arranged or executed as in the first or the second variant of the second embodiment. Here, however, the arrangement according to the second variant is advantageous, ie with simultaneously applied to form cylinder 02 and central roller 13 in Druck-An salaried or adjustable inking rollers 12.1; 12.2. The additional roller 31 can then either be arranged in the inking unit 03 so that it interacts with the upper roller 21.2 in the first variant of the third exemplary embodiment (eg. Fig. 4 ), or that it interacts with the lower roller 21.1 in a second variant (eg. Fig. 5 ). In the two variants of the third embodiment, the central roller 13 either smooth, ie formed without structuring or with a fine structure, while the film roller 31 as an effective roller 31 is preferably formed with a structuring on the lateral surface in the coarse region.

In a third ( Fig. 6 ) and fourth ( Fig. 7 ) Variant of the third embodiment, the roller assembly corresponds to that of the first ( Fig. 4 ) or second ( Fig. 5 ) Variant with the difference that the film roller 31 is in direct contact only with the ductor roller 14 and with the central roller 31. That too Fig. 4 and Fig. 5 otherwise stated. In the Fig. 6 Preferably in the direction of rotation of the central roller 13 following application roller 12.2 or in Fig. 7 With respect to the direction of rotation of the central roller 13 of the nip with the film roller 31 preceding applicator roller 12.1 can then with a rider than roller 22.2; 22.1 effective, preferably changeable, roller 22.2; 221 work together. In a development, this roller 22.2; 22.1 or can this together with the respective applicator roller 12.2; 12.1 so movable be arranged that the roller 22.2; 22.1 in another operating situation with simultaneous contact with the applicator roller 12.2; 12.1 also in contact with the film roller 31 accordingly Fig. 4 or. Fig. 5 is available.

In a fifth ( Fig. 8 ) and sixth ( Fig. 9 ) Variant of the third embodiment of the inking unit 01 (09) corresponds to the roller arrangement of those of the first ( Fig. 4 ) or second ( Fig. 5 ) Variant with the difference that the applicator roller 12.2; 12.2, which with this order roller 12.2; 12.1 associated intermediate roller 22.2; 22.1 and cooperating with the latter roller 22.2; 22.1 forms a roller train to the film roller 31, although it is employed on the forme cylinder 02, but not on the central roller 13. That too Fig. 4 and Fig. 5 otherwise stated. In a development, this applicator roller 12.2; 12.1, however, be arranged so movable that this applicator roller 12.2; 12.1 in another operating situation in simultaneous contact with the forme cylinder 02, the roller 21.2 and the central roller 13 can be brought.

For the second printing unit 09 of a double printing unit 26, the one mentioned for the first printing unit 01 is to be used correspondingly for all examples.

Under "structuring" are understood here not only due to minor surface roughness unevenness, but - preferably retrospectively z. B. introduced mechanically, thermally or by chemical reaction in the surface - wells of at least 10 .mu.m, in particular at least 20 microns, depth against the undisturbed surface.

The structure of the structured roll 13 (or the roll 31) may be defined, for example, by pits (for example in the form of an anilox roll), by a number of recesses which are inclined relative to the circumferential direction, for example by means of a fineness. As scribed or introduced by laser grooves or a number of each other crossed rotating Depressions, z. As grooves, be formed so that ultimately diamond-shaped elevations remain. Also, the roller 13 (or roller 31), in particular as a film roller 13 (31) may be formed in cross-section with a polygonal circumference, the secants then as depressions for "gripping" of the ink are effective. In another advantageous embodiment, the roller 13 or 31 (eg in the form of a film roller 13, 31) has a lateral surface with a stochastic structure of depressions, ie a lateral surface with an irregular distribution of depressions structuring this surface, which for example also have an uneven shape and / or no specific preferred direction. The stochastic structure is z. B. by shot peening into the originally smooth and homogeneously formed lateral surface of the roller 13; 31 introduced. The roller 13; 31 has z. B. a hard surface (eg., At least 50 Shore D) on.

In a particularly advantageous embodiment, the central roller 13 is designed to be tempered. For this purpose, it is associated with a tempering device, not shown, through which the temperature of the roll shell and / or located on the roll shell ink is directly or indirectly tempered. For this purpose, the roller 13 is preferably designed to be permeable by a tempering fluid, which is supplied, for example, from a suitable tempering device. In this case, the tempering device may be the one which also supplies the forme cylinder 02 with tempering agent.

In an advantageous development, temperature control means (corresponding temperature control device and sensor system) are provided, by which pressure drop located and / or entering the ink fountain 11 can be tempered, or at least in one side (eg at higher temperatures or lower temperatures) or two-sided (at higher and lower temperatures) limited or limited temperature range can be maintained. Thus, the over the gap between the rollers 13 and 14 and / or between the ink blades 17 and the roller 14th required regulatory range restrictable.

The compact arrangement of the printing ink from the central roller 13 decreasing rollers 21.2; 12.2; 12.1; 21.1 of the second, third and fourth embodiments leads to a high number of color fissions in a confined space and also reduces by the presence of transmission and / or Verreibewalzen 22.1; 22.2 the formation of pronounced in the axial direction of color density fluctuations in the inking unit 03, as they may arise, for example, by axially differing due to the print image color decrease. This effect is in particular also countered by the combination with the formation of the ink metering system 11 as a zone-wise with respect to the amount of ink supplied system 11 adjustable.

The inking unit 03 is due to the special geometric arrangement of the rollers 12.1; 12.2; 13; 14; 21.1; 21.2; 22.1; 22.2; 31 extremely compact. The axis of rotation of the central roller 13 is in this case arranged at a smaller distance from the forme cylinder 02 than a roller 21.1 cooperating with the central roller 13; 21.2, in particular as a following after coloring first and a last of several (eg., Two or four) with the roller 13 downstream of the color decrease cooperating rollers 21.1; 21.2. By this arrangement, a color flow at a location on the circumference of the roller 13, which lies in the area facing away from the forme cylinder 02 "Haibschale" of the cylindrical almond surface of the roller 13, and is about more splitting and / or Verreibestellen to this roller thirteenth led around to the forme cylinder 02 out. In the case of the first and second embodiment, two, one transmission and / or Verreibewaltze 22.1; 22.2 having rollers in the manner mentioned around the ink supplying the central roller 13 around. The center of the central roller 13 is in this case z. B. on the side of the mold cylinder near one of the centers of the two pickup rollers 21.1; 21.2 connecting level arranged. The take-off point of the take-off roller 21.1; 21.2 are z. Example, in an angular range between 90 ° and 180 °, measured (each) of the form cylinder next circumferential point in Circumferential direction of the shortest path to the respective take-off roller 21.1; 21.2. The formzylindern closest circumferential point corresponds to the form cylinder near intersection of the plane Z with the circumferential circle. As a result, the two compactors together with the forme cylinder 02 surround the central roller 13 over an angular range of more than 180 °. This arrangement, while retaining a plurality of equalizing nip points, saves significant space over conventional solutions. The above-mentioned principle of the larger distance of the rotation axis of the take-off roll 21.1; 21.2 from the center of the forme cylinder 02 is also applicable to an arrangement, this being provided by only one of several or by only one provided on the circumference of the roller 13 take-off roller 21.1; 21.2 is fulfilled.

With regard to the stability and / or operability, it is advantageous if the central roller 13 is arranged in the inking unit 03, that the imaginary, the centers of the forme cylinder 02 and the central roller 13 connecting plane Z a horizontal, through the center of the forme 02 going plane H at an angle β of 20 ° to 25 ° intersects. Preferably, the center of the roller 13 is below that of the forme cylinder 02. The inking and take-off rollers 12.1; 12.2; 21.1; 21.2 are advantageously arranged in the inking unit 03 such that the planes, which in each case through the centers of the upper rollers 12.2; 21.2 and the center of the central roller 13, intersect at an angle γ2 of 80 ° to 95 °, while the planes passing through the centers of the lower rollers 12.1; 21.1 and the center of the central roller 13, intersect at an angle γ1 of 65 ° to 80 °.

In development, with one or both of the rollers 22.1; 22.2 downstream two, z. B. executed with a smaller diameter, engageable with the forme cylinder 02 inking rollers 12.1; 12.2 be provided acting together. In this embodiment, with the forme cylinder 02 a total of three or even four Inking rollers 12.1; 12.2 be arranged cooperatively.

In one the o. G. Arrangement of take-off rollers 21.1; 21.2 generalized variant, the central roller 13 also act on a plurality of upstream rollers with a Farbdosiersystem 11 together. Here it acts z. B. not directly with a ductor roller 14 and must, for. B. also not be formed with a structured lateral surface. The aforesaid for arranging the take-off rollers 21.1; 21.2 on the circumference of the central roller 13, in particular with respect to the relative position of the centers with respect to the center of the roller 13 and / or the forme cylinder 02, is also applicable here.

In principle, inking unit 03 is to be used in printing units 01 (09) of printing units of different types, for example in sheet-fed offset printing, in I-printing units encountered in commercial printing, in satellite printing units provided in newspaper or semi-commercial printing or here preferably in newspaper or semi-commercial printing stacked in a printing tower lying double printing units.

Of particular advantage is the arrangement of the described compact inking unit 03 in printing units 24, which provide as small a space (with respect to base and ceiling height) a plurality of pressure points 07 (preferably per web page at least four pressure points 07), but still easy to use by the operating staff (eg during maintenance, printing plate change, cleaning and / or adjustment) should be.

Such a printing unit 24 is, for example, by a printing tower 24 with at least four stacked double printing units 26 of two at their transfer cylinders 06; 08 as a double pressure point 07 cooperating printing units 01; 09 (see eg 10 and 11 , In respect of the stability of an advantageous embodiment, the printing cylinder 02; 06; 08; 10 of the Double printing 26 arranged in the above common plane E. Possibly. occurring channel beats then take place simultaneously and z. T. counter directed. In order to avoid fluttering of the printing substrate 04 and thus quality losses in a flat design of the double printing unit 26, the plane E is preferably inclined at an angle α of 76 to 86 ° to the plane of the incoming web 04. In a vertically extending track 04, the plane is thus inclined by 4 ° to 14 ° to the horizontal plane H.

For the second printing unit 09 with the printing cylinders 08; 10 and the inking unit 03 is the first printing unit 01, the printing cylinder 02; 06 and the inking unit 03 to apply executed in the same way.

With regard to the stability and / or operability, it is also advantageous if the compact inking unit 03 is used in conjunction with a divisible printing unit 24. As a result, can be built even closer, while remaining sufficiently easy to use. Thus, for example, due to the short design of an outer side printing plates are changed, this z. B. manually hang or preferably are to be introduced into a device for semi or fully automatic plate change.

One in the area of its double pressure point (s) 07 operational, d. H. for setup and maintenance purposes (as opposed to disassembly or disassembly), separable executed printing unit 24 has two separable parts, hereinafter referred to as partial pressure units 24.1 and 24.2, on.

For this purpose, the printing cylinder 02; 06; 08; 10 of the plurality of (four) stacked double printing units 26 rotatable in or on a right and a left frame or wall section 27; 28 stored in such a way that the two printing cylinder 02; 06 or 08; 10 of a same printing unit 01; 09 the same frame or wall section 27; 28 are assigned. Preferably, the Printing cylinder 02; 06 or 08; 10 more, in particular all the web 04 on the same side printing printing 01; 09 on the same frame or wall section 27; 28 stored. The printing cylinder 02; 06 or 08; 10 can in principle only one side, ie flying on only one end frame frame sections 27; 28 be stored. Preferably, however, each partial printing unit 24.1; 24.2 two end faces to the printing cylinder 02; 06 or 08; 10 arranged rack or wall sections 27; 28 provided. The two separable partial pressure units 24.1 and 24.2 have the respective frame or wall sections 27; 28 and printing units 01; 09 (printing cylinder 02, 06 or 08, 10 and inking 03) on.

The partial printing units 24.1; 24.2 are along a direction perpendicular to the axis of rotation of the printing cylinder 02; 06 or 08; 10 movable towards or away from each other by preferably one of both spatially fixed (here partial pressure unit 24.1), d. H. for example, on a floor 29 of the printing room, a space-fixed support 29, a mounting plate 29 or a mounting frame 13 for the printing unit 24 stationary, and the other (here partial printing unit 24.2) movable relative to the bottom 29 or support 29 or the mounting plate 29 or Mounting frame 29 is mounted. In the area of the pressure points 07 or transfer cylinder 06; 08 to perform maintenance, the printing unit 24 can be moved apart; It is therefore not a particularly large vertical distance between superimposed printing units 01; 09 required.

Due to the compact inking unit 03 and possibly iVm the divisible printing unit 24 and possibly with the arrangement of the printing cylinder 02; 06; 08; 10 in common plane E is a printing unit 01; 09 and a printing unit 24 created which or which ensures good operability in a confined space and is individually adjustable with sufficient print quality in terms of color zones.

LIST OF REFERENCE NUMBERS

01

Printing unit, offset printing unit, dry offset printing unit

02

Printing cylinder, form cylinder

03

inking

04

Substrate, paper web, web

05

-

06

Printing cylinder, transfer cylinder

07

Pressure point, pressure gap, double pressure point

08

Printing cylinder, transfer cylinder

09

printing unit

10

Printing cylinder, form cylinder

11

Color dosing system, color box

12

Roller, inking roller

13

Roller (central, structured), film roller, anilox roller

14

Roller, ductor roller

15

-

16

engine

17

Dosing device, colorimeter

18

Gap (13; 14)

19

drive motor

20

-

21

Roller, take-off roller

22

Roller, transfer and / or Verreibewalze

23

drive motor

24

Printing unit, printing tower

25

-

26

Double printing

27

Rack section, wall section

28

Rack section, wall section

29

Floor, support, mounting plate, mounting frame

30

-

31

Roller, film roller

e

Level (D02; 06; 08; 10)

H

horizontal plane

Z

Plane (connecting centers of the forme cylinder and the central roller)

α

Angle (E; 04)

β

Angle (H; Z)

δ1

corner

δ2

corner

Claims (18)

Inking unit (03) of a printing machine having at least one offset printing unit (01) with a forming cylinder and a transfer cylinder (02, 06; 10, 08), wherein the inking unit (03) has at least two inking rollers (12.1) which can be set against the forme cylinder (02; 12.2) which can be fed directly in parallel from a central roller (13), and wherein the central roller (13) is arranged to act together to form a color film via a nip (18) with a ductor roller (14), which in turn is arranged to cooperate with a zonally adjustable ink dosing system (11), characterized in that at least one further roller (21.1, 21.2) acts as a take-off roller on the surface of the central roller (13) acting together with the ductor roller (14) (21.1, 21.2), which is also co-located with the central roller (13) downstream of the ink stream, and which in turn is downstream s with a transfer and / or Verreibewalze (22.1; 22.2), and the latter with the on the circumference of the central roller (13) geometrically closest inking roller (12.1; 12.2) is arranged to cooperate, and that with the ductor roller (14) cooperating roller (13) structured a regular or stochastically Lateral surface identifies. Inking unit according to Claim 1, characterized in that two further rollers (21.1, 21.2) are arranged as take-off rollers (21.1, 21.2) on the lateral surface of the roller (13) which cooperates with the ductor roller (14). Inking unit according to claim 3, characterized in that the two take-off rollers (21.1; 21.2) are arranged in the inking unit (03), so that the center of the central roller (13) on the side of the cylinder nearer the printing cylinder is one of the centers of the two pickup rollers (21.1; 21.2). arranged connecting level are. Inking unit (03) of a printing machine having at least one offset printing unit (01) with a transfer cylinder (02, 06; 10, 08), the ink supply being zonal with respect to the quantity of ink with respect to a plurality over the width of the inking unit (03) Sections independent of each other adjustable Farbdosiersystem (11) is provided, wherein the Farbdosiersystem (11) for ink discharge downstream with a ductor roller (14) cooperates, and wherein in the inking unit (03) downstream of the Ducktorwalze (14) a central roller (13) is provided which is in touching contact with two rollers (21.1; 21.2) and which has a structured lateral surface, characterized in that the two rollers (21.1; 21.2) are each indirectly indirectly connected via at least one further roller (22.1; 22.2; 12.1; 12.2) The form cylinder (02, 10) are in operative contact, that the two rollers (21.1; 21.2) are arranged on the lateral surface of the central roller (13), s odass the center of the central roller (13) on the form cylinder closer side of one of the centers of the two rollers (21.1; 21.2) are arranged connecting plane, and that the central roller (13) cooperating with the ductor roller (14) is operatively connected to a tempering device for its temperature control. Inking unit according to claim 4, characterized in that the central roller (13) upstream of the ductor roller (14) is arranged cooperatively. An inking unit according to claim 4, characterized in that the two rollers (21.1, 21.2) downstream via in each case at least one further roller (22.1; 22.1), in particular via an axially changierbaren roller (22.1; 22.1), each with at least one inking roller (12.1; 12.2) are in operative contact. Inking unit according to claim 1 or 6, characterized in that the two Ink application rollers (12.1, 12.2) to the forme cylinder (02, 10) employed, but without direct contact with the contact with the ductor roller (14) cooperating roller (13) are arranged. Inking unit according to claim 1, 4 or 5, characterized in that the structuring of the central roller (13) viewed along at least one direction on the lateral surface, which may extend in the axial, in the circumferential or in a direction lying between the axial and circumferential directions, in the middle 30 to 80, in particular 35 to 75, recesses per cm are provided. Inking unit according to Claim 1 or 4, characterized in that none of the roller (13) which cooperates with the ductor roller (14) has no contact contact with a squeegee device which scrapes off a paint. Inking unit according to Claim 1, characterized in that the roller (13) which cooperates with the ductor roller (14) is in operative connection with a tempering device for its temperature control. An inking unit according to claim 1, characterized in that at least the at least one inking roller (12.1; 12.2) is movably mounted between two positions, so that it is optionally between an operation, wherein both the at least one take-off roller (21.2; 21.2) and this applicator roller (12.1, 12.2) are in contact contact with the central roller 13, and an operation, wherein the take-off roller (21.2; 21.2) is in contact contact with the central roller (13) and the next succeeding applicator roller (12.1; 12.2) without contact with the central roller 13 are arranged, can be switched. Inking unit according to claim 2 or 4, characterized in that at least one of the inking rollers (12.1, 12.2) is movably mounted between two positions are arranged so that they are either between an operation, wherein both the two take-off rollers (21.2; 21.2) and the two applicator rollers (12.1; 12.2) are in contact with the central roller 13, and an operation, wherein the two take-off rollers (21.2 21.2) are in contact with the central roller (13) and the two applicator rollers 12.1; 12.2 without contact to the central roller (13) are arranged, can be switched. Printing unit (24) of a printing machine having a plurality of a form and a transfer cylinder (02, 06; 10, 08) having offset printing units (01) and each one of the forme cylinder (02; 10) associated with its coloring inking unit (03), characterized by the Execution of the inking unit (03) according to one or more of claims 1 to 12. Printing unit of a printing press with at least one offset printing unit (01) having a forming cylinder and a transfer cylinder (02, 06; 10, 08) and an inking unit (03), wherein the inking unit (03) can at least two adjoin the forme cylinder (02; Inking rollers (12.1, 12.2), which can be fed directly or indirectly in parallel from a central roller (13), and wherein the central roller (13) is provided upstream with a roller (21.1, 21.2, 31), and the latter upstream with a roller another roller (31) cooperating, which is arranged to cooperate to form a color film via a gap (18 ') with an upstream ductor roller (14), and the ductor roller (14) in turn with a Farbdosiersystem (11) is cooperatively arranged, which with respect to the amount of ink with respect to several over the width of the inking unit (03) adjacent zones is independently adjustable, characterized in that the Offsetdruckwe rk (01) is designed as a dry offset printing unit (01), ie without a dampening unit, and that the roller (31) and / or the central roller (13) acting together with the ductor roller (14) are operatively connected to a temperature control device for their temperature control stands. Printing unit according to claim 13 or 14, characterized in that the forme cylinder (02, 10) is in operative connection with a tempering device for its tempering. Printing unit according to claim 1, 4 or 14, characterized in that means for controlling the temperature of the zonally adjustable Farbdosiersystem (11) located or entering this ink is provided. Printing unit according to Claim 13 or 14, characterized in that the printing unit (24) has a plurality of double printing units (26) of two printing units (01, 09) acting together with their transfer cylinders (06, 08) as a double printing location (07). Printing unit according to claim 1 or 14, characterized in that gap (18) between the two rollers (13; 14) is adjustable in its width.

Images