DE102019103789A1 - Printing unit and printing machine with a printing unit - Google Patents

Abstract

The invention relates to a printing unit for printing substrate by a rotogravure printing process, with a forme cylinder which comprises an imaging pattern of depressions on its circumference, and with an inking unit for coloring the pattern of depressions provided on the forme cylinder, comprising a first inking unit cylinder which is in the area its outer surface comprises depressions corresponding to depressions on the forme cylinder and can be colored by an inking device, the inking device comprising an ink supply space which is at least partially limited by its outer surface on the side facing the inking unit cylinder comprising the depressions, and with at least the one in the operating direction of rotation of the inking unit cylinder comprising the depressions, a retaining means is provided on the downstream side of the ink supply space, through which, viewed in the operating direction of rotation, behind the ink supply space and in front of the nip point with a second color printing cylinder previously applied to the outer surface of the first inking cylinder printing ink can be removed. The ink distribution device is provided with at least one ink distributor, which can be moved back and forth in the axial direction of the first inking unit cylinder by a drive means and comprises an end protruding into the ink supply space at least in the working position and / or an ink outlet of a line system provided for supplying ink which opens into the ink supply space.

Description

10. The invention relates to a printing unit and a printing press with a printing unit according to claims 1 and 10, respectively.

The EP 2 909 033 B1 discloses an intaglio printing machine with a printing unit, in which a plate cylinder designed as an intaglio cylinder is indirectly inked via an ink collecting cylinder. This receives the printing ink via several stencil rollers, which in turn are colored by inking devices. In one embodiment, the inking is carried out by two inking rollers each, which receive the ink via a doctor roller which interacts with an ink fountain. In another embodiment, an ink transfer roller is additionally provided between the doctor roller and the stencil roller.

In the US 4,604,951 A is an Intaglio printing machine with disclosed with a plate cylinder carrying a printing plate, with an applicator roller in rolling contact with the plate cylinder, which has a structure of ink-transfer elevations on the circumference, and with an inking device, which comprises a duct roller and is in rolling contact with the applicator roller. The duct roller has essentially the same circumference as the applicator roller and has on its outer circumference corresponding depressions of different depths to the depressions on the printing plate. When printing, a distance of 0.03 to 0.05 mm is set between the roller and the ink knife.

Through the WO 2005/077656 A1 a inking system of an intaglio printing machine is known, in one embodiment the gravure printing plate is inked directly by a stencil roller, which in turn is inked by a selective ink cylinder. The latter is sprayed with printing ink on its circumferential surface, the excess ink being removed by means of a wiping roller before contact with the stencil roller. In the remaining versions, the intaglio printing plate is inked indirectly via a transfer or collecting cylinder, which is inked via one or more stencil rollers, which in turn is or are inked by a selective ink cylinder. The latter is supplied with printing ink on its circumferential surface by a spray device or a doctor roller which interacts with an ink fountain, the excess ink being removed again by means of a wiping roller before contact with the stencil roller.

The CN 101544098 B relates to a duct roller, an ink transfer device and an ink transfer system of a gravure printing machine. The ink is transferred from an ink supply via an inductor roller, which has an engraving corresponding to the engraving on the gravure cylinder, to an elastic ink roller and from there to the gravure cylinder. When the paint is applied to the duct roller, its outer surface is in contact with a hook-shaped scraper to wipe off the paint at the non-engraved areas. As a result, no uniform ink layer is applied to the elastic ink roller, but rather a color sample with different thicknesses, corresponding to the pattern of the engraving on the gravure cylinder, similar to the shape of a relief. The pressure of the contact on the lateral surface can be adjustable via an adjusting device.

The invention has for its object to provide a printing unit and a printing press with a printing unit.

The object is achieved by the features of claims 1 and 10, respectively.

The advantages that can be achieved with the invention consist in particular in that the consumption of printing ink can be reduced to a particularly low value.

In particular using a corresponding inking cylinder comprising elevations, in particular interlocking and / or disjointed, partial image structures with different colors can be produced.

By using a collecting cylinder that works together with several inking units, several colors can be printed at the same time, in particular with interlacing and / or unrelated partial image structures.

In a particularly advantageous embodiment for a printing unit for printing, preferably arc-shaped, substrate using a gravure printing method, it comprises a forme cylinder, which comprises an imaging pattern of depressions on its circumference, and an inking unit for coloring the pattern of depressions provided on the forme cylinder. The inking unit comprises an inking device, by means of which a first inking unit cylinder, which comprises depressions corresponding to depressions on the forme cylinder in the area of its lateral surface, can be inked in the area of an application point lying on its circumference, and a second inking cylinder, which preferably has depressions in the area of its lateral surface has corresponding elevations on the forme cylinder or raised areas which correspond to regions of the imaging pattern of depressions comprising depressions on the forme cylinder. The inking device comprises at least one in the direction of rotation the inking cylinder comprising the depressions downstream of the application point - in particular between this application point and a nip point to the downstream inking unit cylinder - a z. B. designed as a doctor blade or ink knife, through which in the direction of rotation D considered behind the ink application and before the first nip point with the second inking cylinder previously applied to the outer surface of the first inking cylinder printing ink is removable.

In a particularly preferred embodiment, a third inking unit cylinder having a preferably elastic and / or compressible outer surface is provided between the second inking unit cylinder, which advantageously has the elevations or raised areas, and the forme cylinder.

In an advantageous embodiment, a squeegee designed and / or effective and - in particular operationally, d. H. at least in the working or operating position or during production - provided in contact with the outer surface of the inking cylinder comprising the depressions, by means of which printing ink lying on non-engraved areas can be removed.

In another advantageous embodiment, the retaining means is spaced apart from the lateral surface in its working position, e.g. B. at least 2 microns, especially at least 5 microns, and / or z. B. at most 100 microns, in particular at most 50 microns, spaced and / or spaced from the lateral surface, adjustable color knife formed by which on non-engraved areas printing ink to a small layer thickness, for. B. at least 2 microns and / or z. B. at most 100 microns, in particular at most 50 microns, lying layer thickness is removable.

The “application point” is also to be understood as a circumferential section that calculates in the circumferential direction and on which ink is applied to the first inking unit cylinder by the inking device.

In a particularly advantageous embodiment, the printing unit for printing on, preferably arc-shaped, substrate by a gravure printing process comprises a forme cylinder, which has an imaging pattern of depressions, for. B. engravings, and an inking unit for coloring the pattern of depressions provided on the forme cylinder. The inking unit in this case comprises an inking device, by means of which a first inking unit cylinder can be inked, which comprises depressions corresponding to depressions on the forme cylinder in the area of its lateral surface, the inking device comprising an ink storage space which, on the side facing the inking cylinder comprising the depressions, at least partially through the lateral surface of which is limited, and a second inking cylinder which has elevations corresponding to depressions on the forme cylinder in the area of its lateral surface or raised areas which correspond to depressions-encompassing areas of the imaging pattern of depressions on the forme cylinder.

In one embodiment, the inking device is arranged on the side of the inking unit cylinder which has the depressions and faces the inking unit cylinder which has the elevations or raised areas. In another embodiment, however, provided on the side facing away and / or on the circumference of the first inking cylinder in the region of the upper half and / or on the side rotating upward during operation.

Instead of or in addition to this, the printing unit in a further development comprises a plurality of ink trains, each with a coloring device, a first inking unit cylinder having depressions and a second inking unit cylinder, which has elevations or raised areas, via which the forme cylinder can be inked directly or indirectly. The first inking cylinder of two ink trains have z. B. different patterns of wells.

Instead of or in addition to the aforementioned advantageous designs and variants, the inking device advantageously comprises a removal device for printing ink collecting behind a retaining means and / or at least the retaining means is designed to be axially changeable and / or at least the retaining means can be adjusted in the radial direction while maintaining the inclination and / or a color distribution device with an axially oscillating color distributor with a distributor head and / or a color outlet is provided and / or monitoring and / or regulation of the fill level is provided and / or the printing ink in the line path to the outlet at the inking device can be temperature-controlled by a temperature control device.

Further design variants and further developments can be found individually or in combinations of the following description and the subclaims.

Exemplary embodiments of the invention are shown in the drawings and are described in more detail below.

• 1a eine Seitenansicht einer Druckmaschine, insbesondere Tiefdruckmaschine in einer ersten Ausführung;
• 1b eine Seitenansicht einer Druckmaschine, insbesondere Tiefdruckmaschine in einer zweiten Ausführung;
• 2a einen vergrößerte Darstellung des Druckwerkes aus 1a;
• 2b einen vergrößerte Darstellung des Druckwerkes aus 1b;
• 3a einen vergrößerten Ausschnitt aus dem Druckwerk gemäß 2a;
• 3b einen vergrößerten Ausschnitt aus dem Druckwerk gemäß 2b;
• 4 eine schematische Darstellung a) eines Musters von Vertiefungen auf dem Formzylinder, b) eines Musters von korrespondierenden Erhebungen auf dem die Erhebungen aufweisenden Farbwerkszylinder und c) eines Musters von korrespondierenden Vertiefungen auf dem die Vertiefungen aufweisenden Farbwerkszylinder;
• 5 eine Seitenansicht einer ersten Ausführung für den die Vertiefungen umfassenden Farbwerkszylinder mit Einfärbeeinrichtung;
• 6 eine Schrägansicht der Einfärbeeinrichtung aus 5;
• 7 eine Draufsicht auf eine Einfärbeeinrichtung gemäß 5;
• 8 eine Detailansicht aus der Einfärbeeinrichtung gemäß 5;
• 9 eine Detailansicht einer Lagerung der das Rückhaltemittel tragenden Traverse mit Axialantrieb;
• 10 ein Detailschnitt des Axialantriebes aus 9 aus anderer Richtung;
• 11 eine Einzelansicht der Farbverteileinrichtung;
• 12 eine Detailansicht der Farbverteileinrichtung aus 11 von schräg unten;
• 13 eine Detailansicht zur Linearführung aus der Einfärbeeinrichtung gemäß 5;
• 14 eine Gesamtansicht der im Gestell angeordneten Einfärbeeinrichtung;
• 15 eine Ausführung der Einfärbeeinrichtung mit alternativen Ausgestaltung des Farbvorlageraumes;
• 16 eine Seitenansicht der Einfärbeeinrichtung mit Stellantrieb;
• 17 eine Seitenansicht im Schmitt der Einfärbeeinrichtung gemäß 16.

Show it:

• 1a a side view of a printing press, in particular gravure printing press in a first embodiment;
• 1b a side view of a printing press, in particular gravure printing press in a second embodiment;
• 2a an enlarged view of the printing unit 1a ;
• 2 B an enlarged view of the printing unit 1b ;
• 3a an enlarged section of the printing unit according to 2a ;
• 3b an enlarged section of the printing unit according to 2 B ;
• 4th a schematic representation of a) a pattern of depressions on the forme cylinder, b) a pattern of corresponding elevations on the inking cylinder having the elevations and c) a pattern of corresponding depressions on the inking cylinder having the depressions;
• 5 a side view of a first embodiment for the inking cylinder comprising the recesses with inking device;
• 6 an oblique view of the inking device 5 ;
• 7 a plan view of a coloring device according to 5 ;
• 8th a detailed view of the coloring device according to 5 ;
• 9 a detailed view of a bearing of the cross member carrying the retaining means with axial drive;
• 10th a detailed section of the axial drive 9 from another direction;
• 11 a single view of the color distribution device;
• 12th a detailed view of the color distribution device 11 from diagonally below;
• 13 a detailed view of the linear guide from the coloring device according to 5 ;
• 14 an overall view of the inking device arranged in the frame;
• 15 an embodiment of the inking device with an alternative design of the ink reservoir;
• 16 a side view of the inking device with actuator;
• 17th a side view in Schmitt the inking device according to 16 .

A printing press, in particular a security printing press, comprises at least one printing unit 500 through which substrate S is printable at least according to a gravure printing process, for example a substrate feed 100 , through which the printing machine on the input side the substrate to be printed S can be fed, a first conveyor line 200 through which the substrate S the at least one printing unit 500 is feedable, a product shot 400 , through which the at least single printed substrate S ' can be combined into containers, as well as a second conveyor line 300 through which the substrate S ' - If necessary, via further processing units - the product intake 400 is feedable.

The printing machine is e.g. B. designed as a sheet-fed printing press, in particular as a sheet-fed printing press, preferably as a sheet-fed printing press printing in an intaglio printing process. The intaglio printing process is a gravure printing process which is preferably used for the industrial production of banknotes, security documents or security elements.

The printing press that preferably prints using a gravure printing process, in particular in an intaglio printing process, in a preferred embodiment comprises a sheet-fed printing press in addition to the at least one printing unit that works using a gravure printing process, in particular an intaglio printing process 500 preferably at least one as a sheet feeder 100 executed substrate feed 100 , by means of which a substrate to be printed S in the form of, in particular, stacked substrate sheets S , e.g. B. substrate sheet S , in particular securities sheets S , is provided on the input side of the printing press or at least can be provided. The rectangular substrate sheets S have z. B. an edge dimension in the range between 475 x 450 mm and 700 x 820 mm; the grammage of the substrate sheets S lies z. B. in the range between 70 g / m ² and 120 g / m ² . It also includes one from the first conveyor line 200 included arch system 201 , by means of which on the sheet feeder 100 provided substrate sheets S e.g. B. via linear funding 202 and / or one or more transfer drums 203 the or a first printing unit 200 the press in a sequence, d. h are fed individually one after the other or at least can be fed. Downstream of the or a last printing unit 500 the printing machine further z. B. one of the second conveyor line 300 included, for example as a rotating conveyor belt or as a rotating chain system, in particular chain gripper system designed transport device 301 to which the at least through the printing unit 500 printed substrate sheet S ' directly or via at least one or more, e.g. B. from the second conveyor line 300 included intermediate cylinders are handed over to the Transport device 301 passed substrate sheets S ' by means of this to a subsequent processing unit or to a delivery 400 , here stack delivery 400 , e.g. B. Multi-stack delivery, trained product intake 400 , are transported or are at least transportable and are stored there or at least can be stored. In execution from 1a and 1b shows the stack delivery 400 in the direction of transport T the substrate arch S ; S ' considered z. B. four stacks or stacking rooms arranged one behind the other 401 on. In the area of the transport facility 301 can an unmarked, z. B. optoelectronic, preferably camera-based inspection system, by means of which a quality of the printed substrate sheet S ' is checked or at least can be checked. The substrate arch S ' are checked in particular to ensure that they are free of errors in comparison with a given template. Depending on this test result, the substrate sheets S ' then placed on a specific stack of the multi-stack delivery.

In principle, at least one printing unit working according to an intaglio printing process 500 in the first and / or second conveyor line 200 ; 300 one or more further printing units operating according to the same or different printing processes can be provided.

The printing unit working according to a gravure printing process, in particular an intaglio printing process 500 , hereinafter also as a gravure printing unit 500 referred to, includes at least one also as an impression cylinder 501 effective and / or designated printing unit cylinder 501 and one with the impression cylinder 501 a pressure point 502 training, as a forme cylinder 503 for rotogravure printing cylinders 503 , especially Intaglio printing cylinders 503 , the impression cylinder 501 and the forme cylinder 503 preferably under high pressure against each other or at least employable. In the form of an arched substrate S ; S ' processing printing machine includes the impression cylinder 501 preferably one or more holding means, e.g. B. gripper bars through which the arcuate substrate S on the impression cylinder 501 overlying by the pressure point 502 is eligible for funding. The forme cylinder 503 carries one or more printing forms on its circumference 504 with the image to be printed, e.g. B. Subject, underlying pattern of depressions 514 , hereinafter referred to as "engravings" 514, where not explicitly specified, regardless of their manufacture. Unless explicitly differentiated, it should be used as a printing form 504 , especially gravure form 504 both a the wells 514 or engravings 514 comprehensive cylinder outer circumferential surface itself or a preferred embodiment than on the forme cylinder 503 releasably arranged or arrangeable, the wells 514 or engravings 514 comprehensive printing form 504 , e.g. B. as a pressure plate 504 or possibly be understood as a printing form sleeve. The forme cylinder is preferably 503 "Multiple size", e.g. B. triple the size, and is to accommodate several, for. B. three, printing form 504 one after the other and / or for printing several z. B. three, print lengths, in particular several z. B. three, substrate sheet S executed per revolution.

The printing unit is preferred 500 or the printing press for printing on the substrate S , especially the substrate sheet S , designed with multiple uses. That corresponding to a printing or repeating length and / or a substrate sheet S The overall image motif assigned is preferably due to the image motifs on the substrate of a multiplicity of juxtaposed in several columns and one behind the other in several rows S benefits to be printed, e.g. B. banknotes formed. Accordingly, the engraving pattern is a printing form assigned to the printing length 504 through a corresponding number of columns and rows arranged in a matrix-like manner - in particular with the same motif - patterns of depressions, e.g. B. Engraved motifs.

There is a removal device for removing excess paint 506 , e.g. B. a wiper 506 with a wiping cylinder 507 , is against the forme cylinder 503 employed or at least employable. The wiping cylinder 507 is on its outer surface z. B. coated with a plastic.

The forme cylinder 503 or a printing form provided on this 504 is through an inking unit 508 one or preferably multi-colored. This inking unit 508 can be arranged in total or in sections of the preferably spatially fixed, which is the pressure point 502 forming printing unit cylinder 501 ; 503 comprehensive printing part 509 be mounted so as to be movable and / or even divisible.

The inking unit 508 includes - with regard to the ink transport direction in the inking unit 508 viewed at the upstream end - one, for example, by an ink supply system with printing ink 517 supplied or supplyable - coloring device 511 , through which a - z. B. first - inking cylinder 512 can be colored. This inking cylinder 512 includes in the area of its lateral surface 518 Indentations 513 , in the following where not explicitly specified, regardless of their manufacture, also referred to as “engravings” 513, which refer to the or part of the engravings 514 on the printing form 504 of the forme cylinder 503 correspond. This does not mean that they have the same dimensions and the same depth as the corresponding engravings 514 must have, but that their shape and / or depth are related to one another, which is or is obtained, for example, on the basis of established or to be established regularities. Is preferred for engravings 513 on the inking cylinder 512 a larger width b513 , e.g. B. as a line width b513 , and / or a greater depth is provided than for the corresponding engravings 514 on the forme cylinder 503 or the printing form enclosed or carried by this 504 . For example, narrow line structures on the printing form 504 on the engravings 513 comprehensive inking cylinder 512 partially even merge into larger engraved areas. For the sake of simplicity, the engravings 513 comprehensive inking cylinder 512 , where not explicitly specified, regardless of the production of the specializations 513 synonymous as a color engraving cylinder 512 designated.

< 10, insbesondere n = 1, 2 oder 3.The outside diameter of the color engraving cylinder 512 is preferably related 1 : n to the outside diameter of the forme cylinder 503 , with n ∈

<10, in particular n = 1, 2 or 3.

Through the coloring device 511 is the first inking cylinder 512 that in the area of its lateral surface 518 to deepening 514 on the forme cylinder 503 corresponding recesses 513 includes, can be colored at an order point lying on its circumference. In this context, the “application point” is also to be understood as a circumferential section that calculates in the circumferential direction and on which ink is applied to the first inking cylinder 512 through the inking device and / or contact with the available ink 517 takes place. The order at the order point can in principle be of any design.

In a preferred embodiment, it comprises the color engraving cylinder 512 inking device 511 a paint room 516 which on the the color engraving cylinder 512 facing side at least in part through its lateral surface 518 is limited (see e.g. 3a and 3b such as 15 ). For example, opening or protruding into the color space 516 - e.g. B. in its axial position in the middle - the opening of at least one - stationary or axially moving - ink supply line through which the proportion of used printing ink 517 in the color presentation room 516 is or can be replaced. Under the paint room 516 should here z. B. generally be understood that space in which is to be applied, with the lateral surface 518 ink in contact 517 located. Depending on the version, this can be a color space that is open at the top, open at the bottom, or closed at the top and bottom 516 be.

With the engravings 513 or wells 513 of the inking cylinder 512 for example, there are depressions with a depth of, for example, up to a maximum of 0.3 mm, in particular a maximum of 0.2 mm compared to the non-engraved lateral surface area.

Downstream of the color engraving cylinder 512 is in the inking unit 508 one to be colored by this - e.g. B. second - inking cylinder 519 provided that in the area of its - preferably elastic and / or compressible - outer surface 521 at least raised areas 522 shows which engraved areas 523 the printing form to be inked 504 correspond. In a particularly advantageous embodiment, however, are on the lateral surface 521 to - especially individual - engravings 514 (i.e. individual engraved lines) of the printing form 504 corresponding surveys 524 , e.g. B. provided in the manner of a relief. The latter does not mean that the surveys 524 the same dimensions in the surface as the corresponding engravings 514 must have, but that their shape in a defined relation to the shape of the corresponding engraving 514 the printing form 504 stands, which is also obtained here, for example, on the basis of established or to be determined regularities. For the sake of simplicity, the raised areas 522 and / or surveys 524 comprehensive inking cylinder 519 , where not explicitly specified, regardless of the type and execution of the surveys 524 synonymous as a color relief cylinder 519 designated. Preference is given to engravings 514 corresponding surveys 524 on the color relief cylinder 519 a larger width b524 intended as for the corresponding engravings 514 on the forme cylinder 503 or the printing form 504 (e.g. as width b514 or knitting strength b514 ). For example, individual surveys 524 in narrow line structures on the forme cylinder 503 or on the printing form 504 on the color relief cylinder 519 partially to larger surveys 524` merge. The individual engravings are also in the event of mergers occurring 514 on the forme cylinder 503 Basis for the pattern of corresponding surveys 524 ; 524` and in this sense are also considered to be individual wells 514 on the forme cylinder 503 to be understood accordingly. In addition, preference is also given to at least a number of surveys which are actually individually resolved 524 on the outer surface 521 of the color relief cylinder 519 includes. Especially in the case of the above-mentioned raised areas 522 with compared to individual surveys 524 This second inking cylinder becomes larger 519 also as a template cylinder 519 designated.

In the surveys 524 ; 524` for example, surveys 524 ; 524` with a height of, for example, between 0.03 and 2.0 mm, in particular between 0.5 and 1.2 mm, compared to the non-printing base. For example, the non-printing reason is the same Depth is provided so that with elevations rolling in the same cylindrical envelope surface, the elevations above ground are the same height. In the case of larger raised areas 522 the height of the ground can be greater than that of the individual engravings 514 correlated surveys 513 .

The width is a particularly preferred embodiment b524 from to engravings 514 the printing form 504 corresponding surveys 524 on the color relief cylinder 519 larger than the width b513 the one on the color engraving cylinder 512 corresponding engravings 513 , and the width of these engravings 513 on the color engraving cylinder 512 again larger than the width b514 the corresponding engravings 514 on the forme cylinder 503 or on the printing form 504 (see e.g. 4th ).

In contrast to the above-mentioned raised areas 522 in which the raised area 522 for example over the area of a variety, e.g. B. more than fifty, adjacent engravings 514 on the forme cylinder 503 extends, it is about to engravings 514 the printing form 504 corresponding surveys 524 preferably surveys 524 , which has a maximum width in the area of its smallest diameter, for example b524 of 0.6 mm and / or a width which is at most 0.5 mm larger b524 than that of the corresponding engraving 514 on the forme cylinder 503 have and / or which z. B. individual engravings 514 on the forme cylinder 503 with a width that is ten times larger by a maximum b513 map and / or which, for example, engravings spaced 1 mm apart 514 on the forme cylinder 503 map individually. There are e.g. B. at least a number, in particular a plurality, of the forme cylinder 503 present engravings 514 individually resolved as surveys 524 on the color relief cylinder 519 pictured.

The engravings 513 on the color engraving cylinder 512 are, for example, directly on the outer surface 518 of the color engraving cylinder 512 provided by the cylinder jacket of the color engraved cylinder 512 on the outer circumference is at least included, or on the outer circumference of an ink transfer form in the form of a printing form, which is in the form of a circumferentially closed ink transfer form sleeve, e.g. B. a so-called. Sleeves, or as a finite gravure form, z. B. with leading and trailing ink transfer form end can be formed.

The inking device 511 includes at least in the direction of rotation D of the wells 513 comprehensive inking cylinder 512 a restraining device downstream of the above-mentioned job site 526 , e.g. B. a squeegee or an ink knife, by which or which in the direction of rotation D considered after the ink application - and especially before a nip point with a subsequent inking cylinder 519 - before on the outer surface 518 applied ink 517 is removable.

In particular, the inking device 511 on at least in the direction of rotation D of the color engraving cylinder 512 downstream side of the paint room 516 such a restraint 526 on which in the direction of rotation D viewed on the output side of the color presentation space 516 , ie in the area of the downstream end of the ink reservoir 516 , on the previously by contact with the lateral surface 518 on this carried ink 517 is removable. The color presentation room 516 is in this version of the paint application on its downstream side in the circumferential direction by the retaining means 526 limited.

The inking device preferably comprises 511 also a sensor device, by means of which a measure for that in the ink reservoir 516 existing color quantity and / or filling level, at least however information about the reaching of a critical filling state, e.g. B. for a lower and / or an upper limit of the fill level.

In a first, e.g. B. in terms of a particularly low color entry advantageous embodiment includes the coloring device 511 on at least in the direction of rotation D of the color engraving cylinder 512 downstream side of the application site or the color presentation room 516 a restraint 526 , which by - in particular at least in the working or operating position - in contact with the preferably hard and unyielding outer surface 518 of the color engraving cylinder 512 standing, preferably variable or adjustable with respect to its contact force, wiping means, in particular a doctor blade, is formed, by means of which printing ink applied to non-engraved areas 517 - is essentially completely - removable. This is an entry of printing ink 517 in places where on the forme cylinder 503 no ink 517 is particularly reduced from the outset. This is done by completely removing the ink 517 also be understood to be the case that traces of printing ink are still present despite scraping under contact 517 remain on non-engraved surface areas.

The restraint 526 , in particular as a wiping agent, e.g. B. as a doctor blade, is advantageously "positive" or correspondingly "positive" in the inking device 511 arranged, ie adjusted with an inclination to the tangent, so that the tangent at the point of contact with the restraining means 526 , e.g. B. wipers, especially the doctor blade, on the side of the ink reservoir 516 forms an acute angle. This angle prevails z. B. at least in the area of the end of action, ie in a z. B. at least 3 mm long, end portion of the restraint 526 which is in contact or contactless with the outer surface 518 works together.

In a second, e.g. B. with respect to a wear advantageous embodiment, the coloring device 511 on at least in the direction of rotation D of the color engraving cylinder 512 downstream side of the application site or the color presentation room 516 for example, a restraining means designed as a preferably adjustable color knife 526 include, through which in the working or operating position a small, preferably adjustable distance, for. B. at least 2 microns, in particular at least 5 microns and / or for example less than 100 microns, advantageously less than 50 microns, in particular less than 20 microns, to the outer surface 518 of the color engraving cylinder 512 producible or manufactured in the company. As a result, the printing ink applied to non-engraved areas 517 to a thin layer of e.g. B. at least 2 microns, in particular at least 5 microns and / or for example less than 100 microns, advantageously less than 50 microns, especially less than 20 microns, limited or limited.

In particular in connection with an at least extensive removal of the printing ink 517 , ie the complete or the removal down to a thin layer, from the non-engraved surface areas of the color engraving cylinder 512 a significant color entry is selectively achieved at desired points, which is why the engravings 513 or wells 513 having inking cylinders 512 or color engraving cylinder 512 is also referred to as a “selective cylinder” 512.

The color relief cylinder 519 has on the circumference, for example, a - preferably elastic and / or at least slightly compressible - material layer, which has the outer surface on its outside 521 trains and the sublime areas 522 or surveys 524 or intervening depressions.

The one by the inking device 511 Color engraving cylinders to be inked 512 and the downstream color relief cylinder 519 place a color unit here - possibly with one or more inking rollers or cylinders arranged in series between them 529 , in the following also as a color train 529 denotes, by which or which printing ink 517 a certain color in the printing unit 500 can be entered and towards the forme cylinder 503 is eligible for funding.

This color train 529 can basically in the region of the downstream end, for. B. directly with the outer surface 521 of the template cylinder 519 , with the forme cylinder 503 or its printing form 504 interacting in the printing unit 500 be arranged. In an advantageous embodiment with regard to multi-color printing, several, e.g. B. at least two such color combinations 529 around the forme cylinder 503 be arranged around. It can be the forme cylinder 503 also one or more in the above manner with a color engraving cylinder 512 executed color combinations 529 and one or more differently executed, z. B. conventional, without color engraved cylinder, color units 532 , e.g. B. Color trains 532 , be assigned with, for example, an ink fountain comprising an ink fountain and an ink fountain roller with a flat surface.

In the case of multiple colors 532 For example, a so-called color separation of the print image, that is to say a partial print image assigned to this color, is colored by this. The patterns of depressions 513 and / or surveys 524 ; 524` or raised areas 522 on the relevant inking cylinder 512 ; 519 two color trains 529 are therefore, at least to a large extent, different from one another.

In one embodiment, which is preferred, in particular with regard to multicolor printing, is the color train 529 in the area of the downstream end, e.g. B. the color relief cylinder 519 , with another, e.g. B. as a transfer cylinder 531 effective inking cylinder 531 arranged interactively. This is in turn in the printing unit 500 with the forme cylinder 503 arranged interacting and preferably has an elastic and / or compressible outer surface.

In a particularly preferred version of the printing unit 500 for one - especially at the printing point 502 simultaneous - multi-color printing unit 500 is the further inking cylinder 531 as a color collecting cylinder 531 executed or effective. Here, several, for. B. at least two, in the above manner with color engraving cylinder 512 executed color combinations 529 or a combination of one or more in the above manner with a color engraving cylinder 512 executed color combinations 529 and one or more differently executed, z. B. conventional, without color engraved cylinder, color trains 532 with, for example, an ink fountain comprising an ink fountain and an ink fountain roller with a flat surface on the circumference of the ink collecting cylinder 531 be arranged. For example, a total of five color combinations 529 ; 532 be provided, of which, for example, three - e.g. B. lower - color stripes 529 as a selective printing ink 517 color traces 529 (briefly selective color combinations 529 ) and the other two - e.g. B. upper - color trains 532 are conventional (see e.g. 2 B) . In principle, however, there can also be a different heterogeneous division and / or positioning of selective and conventional color combinations 529 ; 532 , e.g. B. a lower and an upper color 532 of five color combinations 529 ; 532 conventional and three selective color combinations 529 in between, or a homogeneous design with exclusively selective color combinations 529 be provided.

Basically, the coloring device 511 arbitrarily on the free, ie not on the nip point to the color relief cylinder 519 or possibly other components concealed, circumference with the outer surface 518 be arranged interactively.

In a first version (see e.g. 1a , 2a and 3a) can the inking device 511 however on that of the color relief cylinder 519 opposite side of the color engraving cylinder 512 be arranged. The above contact line or line of the smallest distance is z. B. on that of the color relief cylinder 519 opposite side.

One in execution of the restraint 526 as a scraper, in particular doctor blade, between this and that of the outer surface 518 of the color engraving cylinder 512 formed contact line or in the execution of the restraint 526 as a color knife, the line of the smallest distance on the circumference of the color engraving cylinder 512 is therefore in this first version for the positioning of the inking device 511 on a peripheral portion of the color engraving cylinder 512 that on the the color relief cylinder 519 facing side, especially in the direction of rotation D viewed in front of the intersection with the above-mentioned vertical plane. In the case of a line of contact, it is of course also to be understood as a contact which, viewed in the circumferential direction, has a real, non-zero width, e.g. B. has a width of up to 2 mm. In the case of contact, this can be achieved by "grinding in" the squeegee edge by contacting the outer surface 518 caused and / or wanted for better sealing.

In an alternative second embodiment (see e.g. 1b , 2 B and 3b) is the inking device 511 on the color relief cylinder 519 facing side of the color engraving cylinder 512 arranged. It is under one side of the color engraving cylinder 512 to understand a half space on one side by the axis of rotation R512 of the color engraving cylinder 512 trending vertical plane.

Where it is for the two above Functionally the same components or groups of components are not distinguished here in the reference numerals used for this.

The inking cylinders 512 ; 519 ; 531 and the inking device 511 can be used together with the printing unit cylinders 501 ; 503 be provided in a common frame or in its own, for example from the printing unit cylinders 501 ; 503 supporting frame different frame 533 ; 538 , e.g. B. partial frame 533 ; 538 , be arranged.

Basically independent of the special position and / or special design of the inking device 511 The inking unit frame is designed to be divisible, but advantageously in connection with one of the above positions and / or designs. It includes a z. B. the at least and the inking device 511 and the color engraving cylinder 512 load-bearing frame 538 , e.g. B. partial frame 538 , with frame walls provided on both sides, which of one or the color relief cylinder 519 and if necessary the transfer cylinders 531 supporting frame part is separable and radially, in particular horizontally, movable or moved away, for example in the open state to form an operating and / or maintenance space between them for the operating personnel. This part of the frame can also be used for the printing unit cylinders 501 ; 503 be the supporting frame part, but is preferred as one only the inking unit 508 assigned subframe 533 executed, which in turn from one of the printing unit cylinders 501 ; 503 load-bearing, preferably spatially fixed partial frame radially of the printing unit part 509 , in particular horizontally, can be moved away, for example in the open state to form an operating and / or maintenance space between them for the operating personnel.

Basically independent of the special position and / or special design of the inking device 511 The inking device is advantageous, however, in connection with one of the above positions and / or designs 511 , but at least the restraint 526 , e.g. B. scraper or squeegee or the ink knife, and possibly the limitation of the ink reservoir 516 on the part of the inking device 511 , regarding the relative radial position to the color engraving cylinder 512 adjustable, for example stronger or closer to the lateral surface 518 and less strong or further away from the lateral surface 518 movable (see e.g. schematically indicated by double arrow 534 ). The positioning is done by an actuator 551 , e.g. B. via one of the actuator 551 included gearbox 527 and / or preferably by one of the actuator 551 includes remote-controlled drive means 536 . The latter is in an advantageous embodiment as a force-based drive means 536 formed, preferably by a pressure-operated actuator 536 , e.g. B. working cylinder 536 , especially pneumatic cylinders 536 . This can be used especially in training the restraint 526 ensure a positioning force as a doctor blade and / or vary specifically by selecting the pressure level. In the execution of the restraint 526 as - e.g. B. adjustable in distance - color meter can such a force-based drive means 536 for example against a - preferably adjustable - Slings can be adjusted. This adjustment movement preferably takes place at least in a region close to the cylinder, ie, for example, at least the last 3 mm before reaching the lateral surface 518 , linear or at least approximately linear. In the case of a pivoting movement about a pivot axis, preferably with a radius of curvature that corresponds to at least twice the color engraving cylinder diameter. A movement is particularly advantageous for which the angle of inclination of the restraint means in the adjustment range 526 or the entire moving arrangement is retained. The movement can take place via a guide which defines the movement path 576 be fixed in the drive train between drive means 536 and includes the component to be moved or, parallel to the drive train acting on the component, forces the component to be moved onto the movement path. The the angle of inclination of the restraint 526 or the paint room 516 on the part of the inking device 511 delimiting parts, e.g. B. with respect to the horizontal, maintaining leadership 576 can e.g. B. as a straight linear guide in particular 576 or as a parallelogram guide 576 be provided .. The inking device 511 or at least the restraint 526 and the paint room 516 on the part of the inking device 511 For this purpose, forming parts are, for example, directly or indirectly on a side part 537 , e.g. B. side frame part 537 , especially side plates 537 , correspondingly movably mounted, which in turn is fixed to the frame on a frame 538 of the inking unit 508 or preferably on one with respect to the axis of rotation R512 of the color engraving cylinder 512 solid holding means 539 , e.g. B. Bracket 539 , is stored. In the preferred case that the color engraving cylinder 512 e.g. B. adjustable for adjustment purposes in the radial direction in the frame 538 of the inking unit 508 is stored, is due to the cylinder-fixed storage of the inking device 511 or the inking device 511 load-bearing frame part 537 even if the position of the color engraving cylinder changes 512 a constant relative position of the restraint 526 to lateral surface 518 guaranteed. The bracket 539 can, for example, be fixed with an outer, non-rotating bearing ring of the pin of the color engraving cylinder 512 receiving radial bearing be arranged. The outer bearing ring can be executed eccentrically with respect to its bore and in z. B. a frame bore rotatable or in an eccentric ring in z. B. a rack hole provided eccentric bearing.

The actuating mechanism and its drive can in principle be designed such that in addition to adjusting the position of the restraint 526 and / or the contact force or a distance, also a turning off of the inking device, which is necessary, for example, for maintenance or set-up purposes 511 over a large travel range, e.g. B. at least 50 mm, in particular 100 mm away. The coloring device is in an advantageous embodiment 511 however, e.g. B. on the frame part 537 , from the color engraving cylinder 512 movable away, for example around one on the frame part 537 intended axis 541 pivotable, stored. The back and forth movement can be done manually or by a remotely operated drive means.

Basically independent of the special position and / or special design of the inking device 511 The inking device is advantageous, however, in connection with one of the above positions and / or designs 511 , but at least the restraint 526 , e.g. B. as a scraper or squeegee or as a farm eater, and possibly the limitation of the ink reservoir 516 on the part of the inking device 511 , in the relative axial position to the color engraving cylinder 512 movable, in particular changeable, for example oscillating between a right reversal position and a left reversal position. This movement corresponds to e.g. B. in 3a and 3b a movement in or out of the leaf plane and is therefore only by a slightly oblique double arrow 542 and the symbols representing an arrow end and an arrow tip are indicated. This traversing movement is preferably carried out over a stroke of at least 2 mm in total, for. B. between 3 to 8 mm, preferably between 4 to 6 mm stroke. The storage of the inking device 511 or at least the restraint 526 , e.g. B. as a scraper or squeegee or ink knife, and possibly the limitation of the ink reservoir 516 on the part of the inking device 511 is designed to an axial traverse over a stroke of at least 2 mm, for. B. a stroke between 3 to 8 mm, preferably between 4 to 6 mm. The axial movement takes place via an axial drive 552 , for example traversing drive 552 , e.g. B. via a traversing drive 552 included gearbox 528 and / or preferably by one of the traversing drive 552 includes remote-controlled drive means 543 , especially an electric motor 543 . The inking device 511 or at least the restraint 526 , especially the squeegee, and the ink room 516 on the part of the inking device 511 forming parts are for example on the frame part 537 or the color engraving cylinder 512 load-bearing frame, frame part or partial frame 538 accordingly axially movable. This storage, which enables the axial relative movement, can, as explained above, be carried out centrally or directly on the frame 538 of the inking unit 508 or preferably on a cylinder-fixed holding means 539 be provided. A frequency for the axial traversing is, for example, between 0.05 and 1.00 Hz, preferably in the range from 0.1 to 0.3 Hz.

Basically independent of the special position and / or special design of the inking device 511 A device is advantageous, however, in connection with one of the above positions and / or designs 544 for axial equalization of the color level in the ink storage room 516 , e.g. B. a color distribution device 544 , in particular paint mixing device 544 , intended. This includes, for example, at least one as a distributor finger 546 effective color distributor 546 or especially paint stirrer 546 that with a front end 553 - At least in the working position in the paint room 516 especially so far that it ends 553 in operationally before the restraint 526 or the doctor blade immerses or can immerse the existing filling level. The color distributor 546 the color distribution device 544 can instead of the submerged end 553 or preferably additionally a color outlet 619 include that on the color manifold 546 axially in the ink room 516 is moved back and forth or is movable and thereby to supply ink 517 distributed. In operation, it forms in the paint room 516 available, especially viscous printing ink 517 a so-called ink roller, which is directly in front of the restraint 526 by contact with the lateral surface moving past 518 forms. The at least one color distributor 546 is axially movable, for example, directly or indirectly on the inking device 511 supporting frame 533 ; 538 or preferably on a side part 537 ; 558 the inking device 511 or directly on an optional cross member 547 , e.g. B. Traverse 547 stored. For example, he is on a sled 548 arranged in a linear guide 549 axially movably and - for example via a gear which transforms a rotation into a linear movement - by a drive means 581 , e.g. B. an electric motor 581 , movable back and forth. The color distributor is advantageous 546 with a frequency between at least 0.3 Hz, preferably at least 0.5 Hz back and forth.

Basically independent of the special position and / or special design of the inking device 511 The color engraving cylinder is advantageous, however, in connection with one of the above positions and / or designs 512 operational - ie for example for an exchange or for maintenance and / or armament purposes and / or z. B. without disassembling additional inking unit components - can be removed in the inking unit 08 or its frame 533 ; 538 stored. In one embodiment, this can be a removal in the axial direction of the inking cylinder 512 or in another embodiment, a removal in the radial direction.

Basically independent of the special position and / or special design of the inking device 511 The color engraving cylinder is advantageous, however, in connection with one of the above positions and / or designs 512 temperable, in particular designed to be flowed through by temperature control fluid.

Basically independent of the special position and / or special design of the inking device 511 , but advantageous in connection with one of the above positions and / or designs is the color master 516 ink to be fed 517 in the pipeline upstream of an exit into the paint room 516 temperable. For this purpose, for example, a temperature control device is in the paint supply line 604 especially heating device 604 intended.

Basically independent of the special position and / or special design of the inking device 511 The color engraving cylinder is advantageous, however, in connection with one of the above positions and / or designs 512 rotationally by its own, from the drive of the other inking cylinder 519 ; 531 and / or printing unit cylinders 501 ; 503 mechanically independent drive motor 616 drivable.

Without restricting the above-mentioned designs and variants, a first exemplary embodiment is further detailed below, in which the inking device 511 on that of the color relief cylinder 519 opposite side of the color engraving cylinder 512 is arranged. The restraint acts 526 e.g. B., for example as an ink knife or in particular as a doctor blade, on the upward rotating side of the engraving cylinder in operation 512 with this together. The latter applies in particular to the execution of the inking unit 508 with additional transfer cylinder 531 , especially ink collecting cylinders 531 .

The inking device 511 includes at least in the direction of rotation D of the wells 513 comprehensive inking cylinder 512 downstream side of the above-mentioned application site or the color presentation room 516 the restraint 526 , e.g. B. a squeegee or an ink knife, by which or which in the direction of rotation D considered after the ink application - and especially before a nip point with a subsequent inking cylinder 519 - before on the outer surface 518 applied ink 517 is removable. In this version the restraint is 526 preferably designed as a doctor blade and removed on the outer surface 518 previously applied ink 517 of non-engraved areas in the above sense completely.

The contact line or in the execution of the restraint 526 as a color knife, the line of the smallest distance on the circumference of the color engraving cylinder 512 is preferably in the region of the upper half, e.g. B. in the range of 10 ° to 30 ° above the horizontal, the color engraving cylinder 512 . The retention means, which is preferably designed as a doctor blade 526 is in a two-part restraint holder 554 , especially doctor blade holder 554 , held, especially clamped, the z. B. Color space side of a recording bar 556 and on the outside a releasably connected to the former, for. B. screwed, cover strip 557 having. The restraint holder 554 , especially the mounting bar 556 , can for example be self-supporting and immediate, e.g. B. directly on side panels 537 ; 558 , e.g. B. side frame parts 537 ; 558 , for example side plates 537 ; 558 , be stored, but is preferably on or on a cross member 547 , e.g. B. the traverse 547 , arranged the z. B. on both sides of the front frame parts 537 ; 558 is stored. A part of the mounting bar that continues downwards 556 alone or together with the possibly provided traverse 547 or a possibly provided further component forms the rear, ie the color engraving cylinder 512 opposite limitation of the color presentation space 516 . The color template is at the bottom 516 In a first variant, it is open - except for a color distributor that protrudes from below if necessary 546 a possibly provided color distribution device 544 and / or an ink collecting device provided, for example, underneath 561 for printing ink that drips off during operation or afterwards 517 . There is, for example, a guide device 563 , e.g. B. a one-part or multi-part the lateral surface 518 straight or almost touching baffle 563 provided which is the printing ink 517 to the lateral surface 518 conducts to in the direction of rotation back to the restraint 526 to be transported. Underneath can be a container 562 , e.g. B. a sump 562 for recording, for example, at a standstill from the color storage room 516 running ink 517 be provided.

From the effective edge 566 of the restraint 526 , e.g. B. the squeegee edge 566 that of the recording bar 556 spaced apart is, for example, one in the color presentation space 516 uplifting barrier 564 , e.g. B. Drop barrier 564 , provided by which ink runs off 517 is counteracted at the rear boundary. This barrier 564 can by shaping the mounting strip 556 or with a separate, angled bar 564 be educated.

On the front side is the color presentation room 516 through side panels 567 , e.g. B. side plates 567 limited. These side panels 567 , also known as a side seal, closes the color space 516 from the side and have on the color engraving cylinder 512 facing side 568 , e.g. B. Seal side 568 , a profile complementary to the cooperating cylinder circumferential section. This means that this side can be positioned almost without a gap on the relevant cylinder circumferential section. The side parts 567 can be formed from an at least slightly compressible and / or elastic material or on the side effective for sealing 568 an edition of a resilient, e.g. B. compressible and / or elastic material. The side parts 567 are z. B. on the face of the mounting strip 556 the restraint holder 554 and / or on the crossbeam carrying them 547 arranged, in particular releasably attached. They can go in the direction of the color engraving cylinder 512 movably mounted and z. B. by spring means, e.g. B. compression spring, in the direction of the color engraving cylinder 512 be biased. The two side parts 567 act directly on the engraving 513 having lateral surface 518 or in the case of one from the color engraving cylinder 512 worn, the engravings color transfer form preferably together with edge areas of this color transfer form.

With the mounting bar 556 the restraint holder 554 and / or with the cross member carrying them 547 can be a holding device 569 be provided on which a possibly provided, below-described acceptance device 572 arranged, in particular can be arranged releasably.

The the color template room 516 on the part of the inking device 511 immediately surrounding components, e.g. B. at least the restraint holder 554 including restraint 526 , the cross member, if any 547 , possibly the side parts 567 , a possibly provided acceptance device 572 or holding device 569 for an acceptance device 572 and, if necessary, firmly on these components, e.g. B. detachably arranged for maintenance or set-up purposes other components such. B. further restraint means and / or possibly provided color knife drives, are also in their entirety below as a color unit 571 referred to, especially in connection with a restraint designed as a color knife 526 also as a color box 571 .

This color unit 571 is preferably taken as a whole from the inking device 511 removable, but advantageously at least within the inking device 511 from a working position to one of the color engraving cylinder 512 Maintenance or set-up position further away can be moved. This is the color unit 571 movable, in particular linearly movable, directly on the color engraving cylinder 512 load-bearing frame, frame part or partial frame 538 or preferably on a side part 537 ; 558 , e.g. B. frame part 537 ; 558 , especially a side plate 537 ; 558 , stored, which in turn is directly or indirectly - in turn movable or rigid - on the color engraving cylinder 512 load-bearing frame, frame part or partial frame 538 is worn. The linearly movable storage preferably takes place via a linear guide 573 , e.g. B. dovetail guide 573 .

In an advantageous embodiment already mentioned above, the restraint is 526 , especially the restraint 526 comprehensive and / or the color presentation room 516 limiting color unit 571 by an actuator 551 with z. B. a drive means 536 and / or a transmission 527 , in his or her radial position relative to the color engraving cylinder 512 adjustable, in particular on this on and off this, trained. The drive means 536 is in an advantageous embodiment as a force-based drive means 536 trained, preferably as a pressure-operated cylinder 536 , especially pneumatic cylinders 536 . This can be used especially in training the restraint 526 as a doctor blade ensure a certain setting force and / or vary selectively by choosing the pressure level. In the execution of the restraint 526 as - e.g. B. adjustable in distance - color meter can such a force-based drive means 536 the restraint 526 or the color unit 571 for example against a - preferably adjustable - sling. In an advantageous embodiment, this is also possible via a linear guide 576 or, if necessary, can also be realized by pivoting about a pivot axis, a parallelogram guide is to be preferred in a version for the radially movable bearing, especially in connection with a possible traversing movement 576 intended. This is at least the restraint 526 comprehensive color unit 571 the color unit on both sides or each 571 or the restraint 526 in the above sense, relatively movable side part 558 mounted on two rockers 574 - in particular in the manner of two mutually opposite sides of a parallelogram. These two wings 574 grab the restraint 526 supporting color unit 571 or on the restraint holder 554 on two at different distances from the color engraving cylinder 512 standing positions and are pivotable about pivot axes which are spaced apart from one another accordingly. On the frame side, they can be pivoted at the same distance above one another about respective pivot axes, the distance between the pivot axes on the respective rocker 574 for both wings 574 one is yourself.

The wings 574 are for example in the event that the restraint 526 or the comprehensive color unit 571 are axially movable or changeable, preferably as elastically deformable rockers 574 , e.g. B. formed as a sheet metal strip.

The wings can be mounted on the frame 574 directly on the color engraving cylinder 512 load-bearing frame, frame part or partial frame 538 , or indirectly on such a frame, frame part or partial frame 538 connected, one- or multi-part side or .. frame part 537 be stored. The wings are preferred 547 on the frame side on the one-part or multi-part side or frame part 537 mounted on which also the drive means causing the actuating movement 536 attacks on the frame side. As a drive 536 is possibly an electric motor, but here preferably a pressure-operated cylinder 536 , especially pneumatic cylinders 536 , intended. In the event that the above-mentioned axial mobility or traversing is provided, the drive means is coupled to the drive means 536 to the color unit 571 or the restraint holder 554 via an articulated connection 577 , e.g. B. via a ball joint head 577 .

The color engraving cylinder 512 and the inking device 511 can directly on the printing unit frame or on the relevant partial frame 538 (533) can be arranged. In an advantageous further development, they are on side parts 578 one the color engraving cylinder 512 and the inking device 511 bearing supporting frame, which - for example via slide or in particular roller bearings - as a unit, in particular along a horizontal direction, on guides 579 movable, for example movable, in particular with the color engraving cylinder 512 to the downstream inking cylinder 519 is on or off this.

In an advantageous embodiment with changeable or changeable retention means 526 or changeable or changing color unit 571 is basically an axial drive 552 an axially acting linear drive, e.g. B. an electric motor rotated and reversible in the direction of rotation spindle drive, in particular ball screw drive, or a reversible linear motor in the direction of movement can be provided. In a preferred embodiment here, the axial drive takes place via the rotation of an electric motor 543 executed drive means 543 into a linear motion gear 528 . This includes, for example, a rotatable, with an axis of rotation z. B. perpendicular to the desired axial direction eccentric disc 583 which in a recess 584 engages with the restraining means holder on a crosswise fixed or at least stiff 554 connected component is provided. The latter can be an extension, for example 586 , e.g. B. a tab 586 , be that on the color unit 571 directly or - in the case of an above-mentioned removability - on the color unit 571 radially movable side part 558 is arranged. The recess 584 viewed in the axial direction has a clear width that is the outer diameter of the eccentric disc 583 corresponds to or is slightly larger. Perpendicular to this, for example, a larger clear width is provided at least the diameter of the eccentric disc 583 plus the double eccentricity. The eccentric disc 583 can by the electric motor 581 directly, or via a gearbox 587 , e.g. B. here a corner gear 587 , be driven.

In an advantageous embodiment with an above-mentioned color distribution device 544 , includes the inking device 511 an above facility 544 for axial color distribution and / or equalization with one in the axial direction of the color engraving cylinder 512 considered (see e.g. double arrow 588 ) axially moveable color distributor 546 . The at least one color distributor 546 , e.g. B. Distribution fingers 546 , is here, for example, over a sled 548 on one - e.g. B. from the above traverse 547 different - cross beams 589 , e.g. B. another traverse 589 , axially movably mounted, which in turn in each case on the end face, directly or indirectly on the inking device 511 supporting frame 533 ; 538 or preferably on a side part 537 ; 558 the inking device 511 is stored. The color distributor 546 the color distribution device 544 can instead of the submerged end 553 or preferably additionally a color outlet 619 include that on the color manifold 546 axially in the ink room 516 is moved back and forth and is movable and thereby the ink to be fed 517 equally axially distributed.

The - here z. B. only - color distributor 546 is on a sled 548 arranged in a linear guide 549 axially movably supported and - for example via a gear which converts a rotation into a linear movement 582 - by a drive means 581 , e.g. B. an electric motor 581 , movable back and forth. The gear 582 is here preferably as a gear unit transforming a rotation into a linear movement 582 , in particular a traction mechanism transmission 582 executed. It includes a traction device, preferably rotating 591 , e.g. B. a toothed belt 591 on which of the in or on the leadership 549 , especially linear guidance 549 , stored sledge 548 is fixed in such a way that the axially moving traction means 591 or the run of a rotating traction device 591 follows, on which it is - preferably releasably - fixed. Here is the traction device 591 For example, clamped on a sled-fixed block. On the sledge 548 For example, rollers are provided which interact with lateral, axially extending guides. The traction device 591 is for example by a - z. B. by the traction means 591 partially wrapped drive wheel 592 , e.g. B. Pulley 592 , drivable or driven. This is due to the electric motor 581 driven or driven directly or via a gear.

The reversal of movement can be controlled, for example, via a contactless sensor 617 , e.g. B. a proximity switch 617 respectively. In addition, an emergency stop switching element 618 , e.g. B. designed as a mechanically actuated emergency stop switch 618 , be provided, which is on the face of the carriage 548 or one with the sledge 548 axially moving component is provided in the path of movement.

The distributor finger 546 can be in the area of its front end, effective for the distribution 553 , e.g. B. a mixing head, 553 , several stirring elements 593 include which, for example in the manner of paddles or as - z. B. multi-row arrangement of tines can be formed.

In an advantageous embodiment of an above-mentioned color distribution device 544 comprehensive coloring facility 511 this comprises a sensor device 594 , by which a measure of that in the color presentation room 516 existing color quantity and / or filling level, at least however information about the reaching of a critical filling state, e.g. B. for a lower and / or an upper limit of the fill level.

For this purpose, includes between sledges 548 and mixing head 553 lying arm a section 596 , which is designed with a lower transverse stiffness in the axial direction compared to other arm sections. In particular, this section 596 with such reduced transverse rigidity so that the arm in this section 596 in working position with axial movement at operating speed and sufficiently filled ink reservoir 516 - undergoes a significant elastic bend at least in the axially central movement section and / or at maximum axial speed. In this section 596 is on at least one side pointing in the axial direction, preferably on both sides, a sensor extending in the longitudinal direction of the arm and detecting a stretch and / or compression 597 , e.g. B. Strain Gauges 597 , intended. The strain gauge (s) 597 load-bearing section 596 can be achieved by a web-like taper 598 embrace opposite arm sections. The area of rejuvenation 598 can be used with compressible and / or elastic filling pieces 599 be filled. Basically, the arrangement of one or more such sensors 597 in a simple design - possibly with losses in accuracy - can also be provided on an arm of homogeneous cross section.

The sensor device 594 or the strain gauge (s) 597 is or are operatively connected to signaling and / or control means, not shown.

In normal operation, ie a sufficient fill level, it delivers in the ink storage room 516 present printing ink 517 for those in the working position and at operating speed changeable color distributor 546 a certain resistance, which results in a certain, operationally desired bend and thus a certain signal. Is the color template room missing? 516 now on ink 517 , the resistance decreases and the signal representing the elongation changes accordingly. A lower limit can be determined empirically, for example. Although an evaluation of the current fill level via a correlation of the signals with the fill level over a range is conceivable, monitoring for reaching a limit value is provided in a simpler embodiment, upon reaching which a warning and / or preferably a refill of a certain amount of printing ink is provided 517 he follows. For this purpose, the evaluation and / or control means relating to the fill level can be provided with an actuating and / or conveying device 601 , e.g. B. a valve or preferably a pump 601 , be connected through which printing ink 517 from a color reservoir 602 , e.g. B. a paint tank 602 , in the color presentation room 516 is eligible. The funding takes place z. B. via a line system with at least one flexible or / or at least one rigid line section 603 .

Basically, the supply of the printing ink 517 in the color presentation room 516 on one, e.g. B. in the middle or stationary at several axially spaced locations. This is particularly the case, for example, in the event that no above-mentioned color distribution device 544 is provided. In an advantageous embodiment, the ink supply through the line system takes place via an in the ink reservoir 516 opening color outlet 619 that is axially in the ink room 516 is moved back and forth or is movable. In version with color distribution device 544 becomes the color outlet 619 preferably with the color distributor 553 moves and is especially on the color distributor 553 arranged. The one for the color outlet 619 or at least to a connection point on the slide 548 leading line section 603 can be flexible or rigid as described here. In the case of a rigid design, at least one oscillating part of the line system, in particular the above-mentioned line section 603 , can be on the side of the frame 538 a frame construction 621 be provided, the upstream flexible line section 622 leads and / or offers protection of the operating personnel against collision.

In an advantageous embodiment, the supply system, in particular in the line system, comprises a temperature control device 604 through which the printing ink 517 can be tempered to a constant and / or desired operating temperature. In principle, this can be anywhere in the conveying path between the color reservoir 602 and color exit point, e.g. B. ink outlet 619 , in the color presentation room 516 provided and be carried out in principle in any manner. However, it is preferred here as a heating device based on electrical resistance 604 or a heater based on electromagnetic induction 604 formed and / or is in a - preferably rigid - line section 603 , e.g. B. integrated into its cable sheath. An advantageous embodiment comprises, for example, a tubular sleeve made of ferrous material that can be excited by a coil winding and which is arranged directly or via a non-magnetic and / or thermally highly conductive coaxial sleeve, e.g. B. a copper sleeve, the actual line itself forms or surrounds such. The line section 603 and / or an outlet-side end of the temperature control device 604 is preferably close in the feed system, e.g. B. less than twice the width b512 of the color engraving cylinder 512 removed, intended for color exit.

Particularly advantageous for an embodiment in which the restraint means 526 on the side of the color engraving cylinder that rotates upwards during operation 512 interacts with this, but not just for such, arrangements are in place on the downstream side of the edge 566 of the restraint 526 , e.g. B. the squeegee edge 566 , no or at least a large amount of printing ink 517 collects. This can be a measure, for example, according to which the restraint 526 on its downstream side, at least in an area close to the edge, a paint-repellent, for. B. oleophobic surface layer, e.g. B. has coating.

Instead or in addition to this, for example, there is an acceptance device 572 provided, through which, if necessary, on the downstream side of the edge 566 of the restraint 526 , e.g. B. the squeegee edge 566 , collecting ink 517 is removable, in particular removable. As a result of the highly viscous nature of the printing ink 517 can this - e.g. B. even with restraint employed as a doctor 526 - gradually under the edge 566 step through and accumulate on the other side. This can also be done by conveying in the engravings 513 be justified. The removal from the downstream side of the edge 566 can basically be done in different ways. For example, from the acceptance device 572 a blowing device directed towards the downstream edge region, e.g. B. a so-called air sword, can be included, through which otherwise accumulating ink 517 continuously or clocked on the outer surface 518 blown and always transported in small quantities.

In an advantageous embodiment shown here, the removal device comprises 572 a - preferably over at least the entire width of the restraint 526 and / or by the side parts 567 limited at the face Color space 516 extending - cleaning tape 606 , which is adjacent to the downstream edge 566 of the restraint 526 at a short distance from the lateral surface 518 of the color engraving cylinder 512 , e.g. B. less than 10 mm, e.g. B. less than 5 mm, preferably less than 3 mm apart, is guided past this or can be passed. The distance from the edge is 566 viewed in the direction of rotation z. B. also less than 10 mm, e.g. B. less than 5 mm, preferably less than 3 mm. The fresh cleaning tape is preferred 606 from a stock 608 taken, e.g. B. a role 608 processed, possibly via one or more deflection elements 611 , e.g. B. pulleys 611 , in the angle between the lateral surface 518 and downstream side of the restraint 526 introduced there by a - preferably wedge-like immersed in the angle - deflecting element 607, z. B. guide wedge 607 , deflected, and possibly via one or more deflection elements 612 , e.g. B. pulleys 612 in one shot 609 collected, e.g. B. on a roll 609 is wound up. As a cleaning tape 606 is preferably an at least slightly absorbent cleaning tape 606 , especially a paper web 606 , intended. The above-mentioned elements of the acceptance device 572 are preferred in a common rack 613 arranged, which for example as a whole from the coloring device 511 removable, e.g. B. of the above holding device 569 - For example, after opening any holding and / or locking device provided 614 - is removable.

In a variant for the coloring device 511 - Exemplified on and particularly advantageous, but not only for the first embodiment - is the color space 516 in operation, ie in the position of the downstream restraint 526 also on the upstream side by at least one further retention means, preferably designed as a doctor blade 623 essentially completely closed. In doing so, the further restraining device can be used 623 as a wiping device or doctor blade preferably there is contact or a small distance, for. B. less than 50 microns, present or be predictable.

In one version of the paint storage room, which is closed on both sides 526 can be used as a chamber in a chambered doctor blade 627 between downstream restraining means 526 , e.g. B. as a doctor blade, and the upstream retention means 623 , e.g. B. as a doctor blade (see e.g. 15 ). This chamber squeegee 627 can, for example, be self-supporting and direct, e.g. B. directly on side panels 537 ; 558 , e.g. B. side frame parts 537 ; 558 , for example side plates 537 ; 558 , be stored, but is preferably on or on an above-mentioned cross member 547 , e.g. B. the traverse 547 , arranged the z. B. on both sides of the front frame parts 537 ; 558 stored.

In addition to this, upstream of the upstream restraint means 623 a guidance device 624 , e.g. B. a baffle 624 , to the outer surface 518 be employed or employable. This is used, for example, to collect and discharge printing ink located in the chamber 517 after the chamber doctor blade has been switched off 627 and is for example via an adjusting mechanism 626 even on the outer surface 518 on and off of this.

Reference list

100

Substrate feed, sheet feeder

200

Conveyor line, first

201

Bow system

202

Funding

203

Transfer drum

300

Conveyor line, second

301

Transport device

400

Product intake, delivery, stack delivery

401

Stacking space

500

Printing unit, gravure printing unit

501

Printing cylinder, impression cylinder

502

Pressure point

503

Printing unit cylinders, form cylinders, intaglio printing cylinders, multi-color printing units

504

Printing form, gravure form, printing plate

505

-

506

Removal device, wiper device

507

Wiper cylinder

508

Inking unit

509

Printing part

510

-

511

Coloring device

512

Inking cylinder, color engraving cylinder, selective cylinder

513

Deepening, engraving ( 512 )

514

Deepening, engraving ( 504 )

515

-

516

Color space

517

Printing ink

518

Lateral surface ( 512 )

519

Inking cylinder, color relief cylinder, stencil cylinder

520

-

521

Lateral surface ( 519 )

522

Area, raised ( 521 )

523

Area, engraved ( 504 )

524

Survey

524`

Elevation, merged

525

-

526

Restraint

527

transmission

528

transmission

529

Color unit, color train, selective

530

-

531

Inking cylinder, transfer cylinder, ink collecting cylinder

532

Color unit, color train, conventional

533

Frame, partial frame

534

Double arrow

535

-

536

Drive means, actuator, pressure medium operated, working cylinder, pneumatic cylinder

537

Side part, frame part, side plate

538

Frame, partial frame

539

Holding means, bracket

540

-

541

axis

542

Double arrow

543

Drive means, electric motor

544

Device for axial equalization, paint distribution device, paint mixing device

545

-

546

Paint distributor, distributor finger, paint mixer

547

Cross member, crossbar

548

Sledge

549

Guidance, linear guidance

550

-

551

Actuator

552

Axial drive, traversing drive

553

End, effective, mixing head ( 546 )

554

Restraint device holder, squeegee holder

555

-

556

Mounting bar

557

Cover strip

558

Side part, frame part, side plate

559

-

560

-

561

Ink collector

562

Collecting container, collecting pan

563

Guide device, guide plate

564

Barrier, drop barrier, bar

565

-

566

Edge, squeegee edge

567

Side part, side plate

568

Side, sealing side ( 567 )

569

Holding device

570

-

571

Color unit, color box

572

Acceptance device

573

Linear guide, dovetail guide

574

Swingarm

575

-

576

Guide, linear guide, parallelogram guide

577

Connection, ball joint head

578

Side panel

579

guide

580

-

581

Drive means, electric motor ( 544 )

582

Gearbox, traction mechanism gearbox ( 544 )

583

Eccentric disc

584

Recess

585

-

586

Extension, bracket

587

Gear, corner gear

588

Double arrow

589

Cross member, crossbar

590

-

591

Traction means, timing belt

592

Driving wheel, belt wheel

593

Stirring elements

594

Sensor device

595

-

596

Section ( 546 )

597

Sensor, strain gauge

598

rejuvenation

599

Filling piece

600

-

601

Actuator and / or conveyor, pump

602

Color reservoir, color tank

603

Line section

604

Temperature control device, heating device

605

-

606

Cleaning tape, paper web

607

Deflection element, guide wedge

608

Stock, roll

609

Recording, role

610

-

611

Deflection element, deflection roller

612

Deflection element, deflection roller

613

Frame ( 572 )

614

Holding and / or locking device

615

-

616

Drive motor

617

Sensor, proximity switch

618

Emergency stop switch element, emergency stop switch

619

Ink outlet

620

-

621

Frame construction

622

Line section

623

Restraint, other

624

Guide device, guide plate

625

-

626

Adjusting mechanism

627

Chamber squeegee

b512

width

b514

Width, line width

b513

Width, line width

b524

width

R512

Axis of rotation

D

Operating direction

S

Substrate, substrate sheet, substrate sheet, security sheet

S '

Substrate, simply printed

T

Direction of transport

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• EP 2909033 B1 [0002]
• US 4604951 A [0003]
• WO 2005/077656 A1 [0004]
• CN 101544098 B [0005]

Claims (10)

Printing unit (500) for printing substrate (S) according to a gravure printing method, with a forme cylinder (503), which has an imaging pattern of depressions (514) on its circumference, and with an inking unit (508) for coloring the on the forme cylinder (503 ) provided pattern of depressions (514), comprising a first inking cylinder (512), which comprises depressions (513) corresponding to depressions (514) on the forme cylinder (503) in the area of its lateral surface (518) and can be colored by a coloring device (511) The inking device (511) comprises an ink reservoir (516) which is at least partially delimited on the side facing the inking cylinder (512) comprising the depressions (513) by its lateral surface (518), and at least in the direction of rotation (D) of the inking cylinder (512) comprising the recesses (513) downstream of the ink supply space (516), a retaining means (526) is provided, through which viewed in the direction of rotation (D) behind the ink reservoir (516) and before the nip point, a second inking cylinder (519) can be used to remove printing ink (517) previously applied to the outer surface (518) of the first inking cylinder (512), characterized in that an ink distribution device (544) is provided with at least one ink distributor (546) which can be moved back and forth in the axial direction of the first inking unit cylinder (512) by a drive means (581) and an end (553) and which protrudes into the ink supply space (516) at least in the working position / or comprises a paint outlet (619), which opens into the paint reservoir (516), of a line system provided for the paint supply. Printing unit after Claim 1 , characterized in that the color distributor (546) is arranged on a carriage (548) which is mounted in an axially movable manner in a linear guide (549) and is reciprocated by the drive means (581) via a gear (582) which converts it into a linear movement is movable here. Printing unit after Claim 1 or 2nd , characterized in that the ink distribution device (544) comprises a sensor device (594) for filling level monitoring and / or control for the printing ink (517) held in the ink storage space (516), which is located on a carriage (548) and in the ink storage space (516) protruding end (553) lying arm portion of the color distributor (546), z. B. on at least one side pointing in the axial direction, comprises a sensor (597) detecting an expansion and / or compression. Printing unit after Claim 1 , 2nd , or 3, characterized in that the inking unit (571) is movably mounted in the inking device (511) with respect to its radial distance from the first inking unit cylinder (512) and in its radial relative position by an actuator (551) comprising a remotely operable drive means (536) first inking cylinder (512) is adjustable. Printing unit after Claim 1 , 2nd , 3rd or 4th , characterized in that the second inking cylinder (519) in the area of its lateral surface (521) has elevations (524; 524 ') corresponding to individual depressions (514) on the forme cylinder (503) or raised areas (522), the depressions (514) corresponding areas (523) of the imaging pattern of depressions (514) on the forme cylinder (503). Printing unit after Claim 1 , 2nd , 3rd , 4th or 5 , characterized in that the inking device (511) is arranged on that side of the inking cylinder (512) having the depressions (513), which faces away from the second inking cylinder (519) and / or that the retaining means (526) on the circumference of the first inking cylinder (512) is arranged in the region of the upper half and / or on the side which rotates upwards during operation, cooperating with the latter. Printing unit after Claim 1 , 2nd , 3rd , 4th , 5 or 6 , characterized in that a third inking unit cylinder (531), which cooperates with the second inking unit cylinder (519) via a second nip point, is provided, which forms a further nip point with the form cylinder (503) for coloring it. Printing unit after Claim 7 , characterized in that the printing unit (500) comprises a plurality of ink trains (529), each with an inking device (511), a first inking unit cylinder (512) having depressions (513) and a second inking unit cylinder (519), which are arranged over the respective second inking unit cylinder (519) with the third inking cylinder (531) designed as an ink collecting cylinder (531) are arranged cooperating on its circumference and / or that the first inking cylinder (512) of two ink trains (529) have mutually different patterns of depressions (513) and / or the second inking cylinder (519) of two ink trains (529) have mutually different patterns of elevations (524; 524 ') or raised areas (522). Printing unit after Claim 1 , 2nd , 3rd , 4th , 5 , 6 , 7 or 8th , characterized in that the retaining means (526) than in its working position in contact with the lateral surface (518) of the Squeegee cylinder (512) standing squeegee is formed recesses (513). Printing machine with a printing unit (500) according to one of the Claims 1 to 9 , characterized by its design as a security printing machine and / or as a sheet-shaped substrate (S) processing printing machine and / or a gravure printing machine working according to the Intaglio method, comprising a substrate feed (100) through which the substrate (S) to be printed can be fed to the printing machine on the input side is, a first conveyor line (200) through which the substrate (S) can be fed to the at least one printing unit (500), a second conveyor line (300) through which the substrate (S ') directly or indirectly a product holder (400) can be supplied, through which the at least single-printed substrate (S ') can be combined into containers.

Images